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DL/T 1996-2019: Specification of performance test for ammonia flue gas desulfurization
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Specification of performance test for ammonia flue gas desulfurization
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DL/T 1996-2019
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Basic data | Standard ID | DL/T 1996-2019 (DL/T1996-2019) | | Description (Translated English) | Specification of performance test for ammonia flue gas desulfurization | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | F24 | | Classification of International Standard | 27.060 | | Word Count Estimation | 13,172 | | Date of Issue | 2019-06-04 | | Date of Implementation | 2019-10-01 | | Quoted Standard | GBZ/T 192.1; GB/T 535; GB/T 536; GB/T 631; GB 8978; GB/T 10184; GB/T 12348; GB/T 16157; GB/T 18204.2; GB/T 21508; GB/T 23349; GB/T 32954; HG/T 2784; HG/T 2785; HJ 533; HJ 836; HJ 2001 | | Issuing agency(ies) | National Energy Administration | | Summary | This standard specifies the content, time, conditions and methods of the performance acceptance test for ammonia flue gas desulfurization units. This standard is applicable to the performance acceptance test of ammonia flue gas desulfurization (flue gas desulfurization with liquid ammonia, gas ammonia, ammonia water or other ammonia substances as absorbent) devices, and can also be used for post-evaluation and other purposes. | DL/T 1996-2019: Specification of performance test for ammonia flue gas desulfurization---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Specification of performance test for ammonia flue gas desulfurization
ICS 27.100
F 24
Record number. 63143-2018
People's Republic of China Electric Power Industry Standard
Specification for performance acceptance test of ammonia flue gas desulfurization unit
2019-06-04 released
2019-10-01 implementation
Issued by National Energy Administration
Table of contents
Preface...II
1 Scope... 1
2 Normative Reference Documents... 1
3 Terms and Definitions... 1
4 Test requirements... 2
5 Test content... 3
6 Test method... 4
7 Performance Test Report... 8
8 Typical measuring point layout... 9
Foreword
This standard is in accordance with the rules given in GB/T 1.1-2009 "Guidelines for Standardization Work Part 1.Standard Structure and Compilation"
Then drafted.
Certain contents of this standard may involve patents. The issuing organization of this standard does not bear the responsibility for identifying these patents.
This standard was proposed by the China Electricity Council.
This standard is under the jurisdiction of the Power Plant Boiler Standardization Technical Committee (DL/T C 08).
Drafting organizations of this standard. Xi'an Thermal Power Research Institute Co., Ltd., Jiangsu New Century Jiangnan Environmental Protection Co., Ltd.
The main drafters of this standard. Niu Yongjun, Dan Huijie, Li Xinghua, Lei Ming, He Yangpeng, Meng Linghai, Yu Zhao, Huan Xuanzhou,
Jia Xixi, Xue Guodong, Qin Xing, Qi Lifang, Chen Chuanwen, Wang Jinyong, Luo Yongying, Li Jiawei.
This standard is issued for the first time.
The opinions or suggestions during the implementation of this standard are fed back to the Standardization Management Center of the China Electricity Council (Beijing
No. 1 Ertiao, Baiguang Road, 100761).
Specification for performance acceptance test of ammonia flue gas desulfurization unit
1 Scope
This standard specifies the content, time, conditions and methods of the performance acceptance test of ammonia flue gas desulfurization equipment.
This standard applies to ammonia flue gas desulfurization (flue gas desulfurization using liquid ammonia, gas ammonia, ammonia water or other amino substances as absorbents)
The performance acceptance test of the device can also be used for post-evaluation and other purposes.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version is suitable
Used in this document. For undated reference documents, the latest version (including all amendments) is applicable to this standard.
GBZ/T 192.1 Determination of Dust in the Air of Workplace Part 1.Total Dust Concentration
GB/T 535 Ammonium sulfate
GB/T 536 Liquid anhydrous ammonia
GB/T 631 chemical reagent ammonia
GB/T 3723 General Rules for Sampling Safety of Industrial Chemical Products
GB 8978 Integrated Wastewater Discharge Standard
GB/T 10184 Specification for performance test of power station boilers
GB/T 12348 Environmental Noise Emission Standard at the Boundary of Industrial Enterprises
GB/T 16157 Determination of particulate matter in exhaust gas from stationary sources and sampling method and amendment of gaseous pollutants
GB/T 18204.2 Hygienic inspection methods for public places Part 2.Chemical pollutants
GB/T 21508-2008 Coal-fired flue gas desulfurization equipment performance test method
GB/T 23349 Ecological indicators of arsenic, cadmium, lead, chromium and mercury in fertilizers
GB/T 32954 Determination of fluoride in fertilizers ion selective electrode method
HG/T 2784 Ammonium sulfite for industrial use
HG/T 2785 Ammonium Bisulfite for Industrial Use
HJ533 Ambient air and exhaust gas ammonia determination-Nessler's reagent spectrophotometric method
HJ836 Gravimetric method for determination of low-concentration particulate matter in waste gas from stationary sources
HJ.2001 General technical specification for ammonia flue gas desulfurization engineering
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Ammonia flue gas desulfurization
Refers to a wet flue gas desulfurization process that uses amino substances as absorbents to remove SO2 and other acid gases in flue gas, referred to as ammonia method.
3.2
Absorbent
Refers to the reactant used to remove SO2 and other acid gases in desulfurization projects.
3.3
By-product
Refers to the substance produced after the absorbent reacts with SO2, O2, etc. in the flue gas.
3.4
Free ammonia
Refers to ammonia that exists in gaseous form.
3.5
Dissolving ammonium
Refers to the total amount of ammonium salt dissolved in water.
3.6
Ammonia slip
Refers to the free ammonia in the unit flue gas volume (101325Pa, 0℃, dry basis, reference oxygen) after desulfurization when the desulfurization device is operating
The quality (mg/m3).
3.7
Crystallizer tank
Refers to the slurry pool that produces ammonium sulfate crystals or promotes the growth of ammonium sulfate crystals.
3.8
Oxidation tank
Refers to the slurry tank that oxidizes ammonium sulfite to ammonium sulfate.
3.9
Total solid particles concentration
Refers to the total amount of suspended solids and dissolved particulate matter per unit volume of flue gas (101325Pa, 0℃, dry basis, reference oxygen)
And, including the soot particles that cannot be completely collected by the dust collector and the secondary organisms produced in the flue gas desulfurization process (mg/m3).
3.10
Recovery rate of ammonia
Refers to the ratio of the quality of ammonia in the by-product of desulfurization engineering to the quality of ammonia used for desulfurization. Calculate according to formula (1).
4 Test requirements
4.1 Test time
The performance acceptance test of the newly-built desulfurization device shall be 2 after the completion of the overall trial operation of the desulfurization device (usually 168 hours).
Months later, at an appropriate time within 6 months. The performance acceptance test of the in-service desulfurization device should be run for half a month after maintenance
get on.
4.2 Performance test conditions and test conditions requirements
The performance acceptance test of the desulfurization device shall be carried out in the desulfurization equipment specified in the technical contract signed between the owner and the general contractor.
It should be carried out under the working conditions corresponding to the main performance guarantee value clauses, and should be carried out under the boiler BMCR working condition or ECR working condition. Sex
The acceptance test should last for 3 days or more under the stable operation of the desulfurization device design conditions.
During the performance acceptance test, the flue gas volume, temperature, soot content, SO2 concentration and other parameters at the inlet of the desulfurization device should be adjusted
To design conditions, the smoke and smoke composition should be within the design range to meet the design requirements.
4.3 The steady state of the desulfurization device performance acceptance test
If the desulfurization device is equipped with a bypass flue, the bypass baffle should be in a completely closed state. During the performance acceptance test,
The boiler and desulfurization device should operate stably, and the boiler load fluctuation of each test condition should not exceed 5%. The operation parameters of the desulfurization device
The number should not change much.
4.4 Requirements for fuel, absorbent and process water
During the performance acceptance test, the coal quality, absorbent and process water quality shall meet the design requirements.
4.5 Confirmation of the operation status of the desulfurization unit
Before the performance acceptance test starts, the general contractor shall confirm the operation status of the desulfurization device and contact the equipment supplier for
Calibration of online instruments such as the continuous flue gas emission monitoring system (CEMS), and proposes the main operation of the desulfurization device during the test
The method and parameter requirements are confirmed by all parties involved in the performance acceptance test.
4.6 Revision of performance test results
Before the performance acceptance test begins, the general contractor shall provide the relevant correction curve and confirm it jointly by all parties involved in the performance acceptance test.
recognize. When the performance acceptance test conditions deviate from the design conditions, the confirmed correction curve should be used to adjust the test results in an appropriate range
Make corrections within.
5 Test content
5.1 The test items that should be done for the performance acceptance test of ammonia flue gas desulfurization device shall have at least the following contents
a) The flue gas flow rate of the desulfurization device;
b) The concentration of SO2 in the flue gas at the inlet and outlet of the desulfurization unit and the desulfurization efficiency of the desulfurization unit;
c) The concentration of particulate matter in the flue gas at the inlet and outlet of the desulfurization unit and the comprehensive dust removal efficiency of the desulfurization unit;
d) Ammonia escape concentration of desulfurization unit;
e) Ammonia recovery rate of desulfurization unit;
f) The flue gas temperature at the inlet and outlet of the desulfurization device;
g) Absorbent composition;
h) Absorbent consumption;
i) The components of desulfurization by-products;
j) The flue gas resistance of the desulfurization device;
k) Electricity consumption of desulfurization unit;
l) Water consumption of desulfurization device;
m) The output of desulfurization by-products;
n) Noise from main equipment of desulfurization unit;
o) The droplet content after the mist eliminator;
p) Dust concentration in the workplace.
5.2 Optional test items for the performance acceptance test of ammonia flue gas desulfurization device
a) HF content in the flue gas at the inlet and outlet of the desulfurization device;
b) HCl content in the flue gas at the inlet and outlet of the desulfurization device;
c) SO3 content in the flue gas at the inlet and outlet of the desulfurization device;
d) The NOx concentration in the flue gas at the inlet and outlet of the desulfurization unit and the denitration efficiency of the desulfurization unit;
e) Heavy metal Hg content in the flue gas at the inlet and outlet of the desulfurization device;
f) The amount of wastewater discharged from the desulfurization device and the quality of discharged wastewater;
g) Other performance guarantee values that need to be tested.
6 Test method
6.1 Records of main operating parameters of boilers and desulfurization devices
6.1.1 During the performance acceptance test, the main operating parameters of the boiler and desulfurization device should be manually recorded every 1 to 2 hours.
6.1.2 During the performance acceptance test, at least one industrial analysis and elemental analysis of coal should be carried out, and the sampling method should be in accordance with GB 10184
carried out.
6.2 Measurement of flue gas parameters
According to GB/T 21508.
6.3 Test of gaseous pollutants in flue gas and removal efficiency
6.3.1 Test location
Inlet and outlet flue of desulfurization device. The average value is calculated after multi-point measurement, and the number of sampling points is in accordance with GB/T 16157.
Row.
6.3.2 Test equipment
It is advisable to use a mobile test instrument with an accuracy not less than that of online measurement, or use the desulfurization device itself configured and verified
Monitoring instrument.
6.3.3 Test parameters
When testing the SO2 concentration in the flue gas, the O2 content in the flue gas should also be measured at the same time, and the test results should be measured according to the emission standards of various industries.
Standard requirements are converted.
6.3.4 Test method
Test according to the following requirements.
a) The original flue gas composition test is carried out in accordance with GB/T 16157, and the direct measurement method can be used.
b) When testing the net flue gas composition, in order to prevent ammonia escape from affecting the test results, the ammonia escape should be installed before entering the test instrument.
Sulfuric acid (98% concentrated sulfuric acid and water volume ratio 1.3) is placed in the first-stage absorption bottle (as shown in Figure 1), and the second
Grade absorption bottle is used as a buffer bottle.
c) The smoke composition test should adopt multi-point measurement and calculate the average value. The number of sampling points should be implemented according to GB/T 16157.
6.3.5 During the performance acceptance test, if the working conditions are continuously stable, the above method of measuring SO2 and O2 concentration can also be used to calibrate the desulfurization first.
The inlet and outlet SO2 and O2 concentration on-line measuring instruments configured by the device itself, and through DCS or manual recording during the test
Calculate the desulfurization efficiency after statistics of these operating parameters.
6.4 Total particle concentration and dust removal efficiency
6.4.1 Sampling position and measuring point
Inlet and outlet flue of desulfurization device. The average value is calculated after multi-point measurement, and the number of sampling points is in accordance with GB/T 16157.
Row.
6.4.2 Test method
The total particulate matter concentration test in the flue gas at the inlet of the desulfurization device can be performed with reference to GB/T 16157.The outlet of the desulfurization device is low in concentration.
The degree of total particulate matter test should be performed according to HJ 836.
6.4.3 When testing the dust removal efficiency of the desulfurization device, the total particulate matter concentration test at the inlet and outlet of the desulfurization device should be performed simultaneously.
6.5 Ammonia escape concentration
6.5.1 Sampling position and measuring point
Outlet flue of desulfurization system. The average value is calculated after multi-point measurement, and the number of sampling points is implemented in accordance with GB/T 16157.
6.5.2 Test method
After the gas-liquid separation pretreatment according to GB/T 16157, the ammonia escape concentration is detected according to HJ 533.The test device is shown in Figure 2.
Show.
6.6 The purity of liquid ammonia or ammonia
6.6.1 Sampling location and sampling method
At the sampling port of the liquid ammonia storage tank, take a sample with a liquid ammonia purity tester, and then seal it with a rubber plug with a hole. In ammonia
At the sampling port of the water storage tank, use a frosted jar to sample and then seal it.
6.6.2 Test parameters
The purity of liquid ammonia or the concentration of ammonia.
6.6.3 Test method
The purity test of liquid ammonia is carried out according to GB/T 536, and the concentration test of ammonia water is carried out according to GB/T 631.
6.7 Desulfurization by-product test
6.7.1 Sampling position
Desulfurization by-product discharge port.
6.7.2 Test parameters
Appearance, mass fraction of moisture (H2O), ammonium sulfate (calculated as N content), free acid (calculated as H2SO4), fluoride,
Arsenic, cadmium, mercury, lead, chromium.
6.7.3 Test method
According to GB/T 535, GB/T 23349, GB/T 32954.
6.8 Ammonia consumption and ammonium sulfate output
6.8.1 The desulfurization device should be equipped with an absorbent metering device. The metering device should be used to monitor the absorbent consumption during the performance acceptance test.
Perform cumulative measurement, and the measurement device should be calibrated before testing.
6.8.2 During the performance acceptance test, the output of ammonium sulfate is calculated according to formula (2).
6.9 Slurry analysis
6.9.1 Sampling position
Discharge port or sampling port of crystallization tank and oxidation tank.
6.9.2 Test method
According to GB/T 535, HG/T 2784, HG/T 2785.
6.10 Electricity consumption
6.10.1 Test location
At the high voltage switch cabinet of the centralized power supply desulfurization device; at each power cabinet of the distributed power supply equipment.
6.10.2 Test method
During the performance acceptance test, a portable electric energy analyzer or an online electric energy meter shall be used for measurement, and shall be carried out according to GB/T 21508.
When the desulfurization device does not have a separate desulfurization fan, it should not be included in the power consumption of the fan.
6.11 Water consumption
6.11.1 Test location
At the water supply pipeline of the desulfurization unit.
6.11.2 Test method
During the performance acceptance test, use the online flow meter or ultrasonic flow meter on the water supply pipeline to measure, according to GB/T 21508
carried out.
6.12 Equipment noise
6.12.1 Test location
1m away from the noise generating equipment.
6.12.2 Test method
According to GB 12348.
6.13 Droplet content test after demister
6.13.1 Test location
Outlet flue of mist eliminator.
6.13.2 Method summary
According to Appendix D of GB 21508, isokinetic sampling is used to make the flue gas pass through the primary and secondary capture devices, and use multi-point testing to collect
The droplets in the flue gas at the outlet of the absorption tower, the droplets larger than a certain particle size in the flue gas adhere to the trap under the action of gravity and inertial force
On the inner wall of the device. Weigh after sampling. The weight of the trapping device after the test minus the weight after fully drying is the water in the drop.
the weight of. This weight includes the condensed water droplets in the flue, which needs to be used to capture the droplets and concentrate the mass concentration of ammonium sulfate in the circulating liquid
To fix it. When sampling, the demister should stop washing with water.
6.13.3 Test method
Record the sampling volume, and calculate the droplet concentration in the flue gas by analyzing the mass concentration of the test collection liquid. Calculate according to formula (3).
Where.
6.14 Dust concentration in the workplace of the desulfurization device
6.14.1 Test location
Loading and unloading rooms for by-products, etc.
6.14.2 Test method
According to GBZ/T 192.1.
6.15 Ammonia concentration in the workplace of the desulfurization unit
6.15.1 Test location
Places such as loading and unloading rooms for absorbents and by-products.
6.15.2 Test method
According to GB/T 18204.25 implementation.
6.16 Quality of wastewater discharged from desulfurization unit
If waste water needs to be discharged externally, the water quality shall comply with GB 8978.
7 Performance Test Report
According to GB/T 21508.
7.1 Data processing
7.1.1 The processing of test data and information should be processed in a timely and accurate manner using computer technology, and guaranteed by the quality assurance system
The accuracy and unity of various test data and information.
7.1.2 For the performance acceptance test, when the actual operating conditions of the desulfurization device deviate from the design conditions, all data should be
Converted to design conditions. The conversion is based on the performance correction curve provided by the general contractor in the supply contract. Correction curve deserves
To the confirmation of all parties involved in the test.
7.1.3 The performance correction curve includes at least.
a) Correction curve of desulfurization efficiency and inlet flue gas volume;
b) Modified curve of desulfurization efficiency and inlet sulfur dioxide concentration;
c) Correction curve of power consumption of desulfurization device and inlet flue gas volume;
d) Modified curve of power consumption of desulfurization device and inlet sulfur dioxide concentration;
e) Correction curve of water consumption of desulfurization device and inlet flue gas volume;
f) Correction curve between water consumption of desulfurization device and inlet flue gas temperature;
g) Correction curve of absorbent consumption of desulfurization device and inlet flue gas volume;
h) Correction curve of absorbent consumption of desulfurization device and inlet sulfur dioxide concentration.
7.2 Report content
A complete test report should be prepared according to the test process and results. The content of the test report should at least include the following chapters.
Description, purpose, content, arrangement of measuring points, methods, conditions, results, conclusions and analysis, attachments.
7.2.1 Overview
Introduce the background of the project, the construction status of the desulfurization device, the main design parameters, the process parameters and the parameters of the main equipment.
7.2.2 Test purpose
Including the design indicators of the desulfurization device and the goals and objectives that the test should achieve.
7.2.3 Test content
Including all test conditions and parameters to be tested.
7.2.4 Layout of measuring points
Including the location map of the measuring points and the grid distribution in the cross-section measurement.
7.2.5 Test method
Including the standards or specifications used in the test, the test procedures, the test process, the model of the measuring instrument and the name of the agent used
Wait.
7.2.6 Test conditions
Including the actual conditions of boilers, coal burning, absorbents and desulfurization devices during the test.
7.2.7 Test results
Including testing of original data, calculation formulas, conversion methods, amendments to the final test under the conditions specified in the contract or design documents
Test result.
7.2.8 Conclusion and analysis
Use item-by-item comparison to compare the indicators to be evaluated and test results item by item. To the performance acceptance test, reach the contract
Or, if the guaranteed value is specified in the design document, it will be deemed qualified; if the guaranteed value specified in the contract or design document is not reached, it will be deemed unqualified.
Analyze and discuss unqualified items.
7.2.9 Accessories
Including the flow chart of the desulfurization device, the test location and measuring point layout diagram, the original data and tables of the relevant test, the correction curve,
Run charts, etc.
8 Typical measuring point layout
8.1 Layout of measuring points for desulfurization device with bypass flue and booster fan
The measuring point arrangement of the desulfurization device with the bypass flue and the booster fan is shown in Figure 3.The measuring point should be installed according to the requirements of each project.
It depends on the specific situation.
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