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MT 182-1988: Alcohol blast burner structure and technical requirements
Status: Obsolete
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Alcohol blast burner structure and technical requirements
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MT 182-1988
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PDF similar to MT 182-1988
Standard similar to MT 182-1988 GB/T 29252 GB/T 11158 GB/T 10589 Basic data | Standard ID | MT 182-1988 (MT182-1988) | | Description (Translated English) | Alcohol blast burner structure and technical requirements | | Sector / Industry | Coal Industry Standard | | Classification of Chinese Standard | N61;D98 | | Word Count Estimation | 7,741 | | Date of Issue | 4/14/1988 | | Date of Implementation | 6/1/1988 | | Quoted Standard | GB 5675; GB 699; YB 146 | | Adopted Standard | BS 5865-81, NEQ | | Regulation (derived from) | Development-Reform-Office-Industry (2006) 97 | | Summary | This standard specifies the structure size alcohol burner, technical and assembly requirements. This standard applies to coal mine with a non-metallic products, laboratory tests used to make an alcohol burner combustion burners. | MT18: ---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.
Alcohol blast burner structure and technical requirements
Contents
1 Topic content and scope of application 1
2 Normative references 1
3 Technical requirements 1
4 Assembly requirements 3
Appendix A Burner Operation (Supplementary) 4
A1 burner operation 4
A2 Burner failure 4
MT/T 182-88
Ministry of Coal Industry Standards
Structure and technical requirements of burner for alcohol torch
1988-04-14 ratified
1988-06-01 implemented
1 Topic content and scope
This standard specifies the structural dimensions, technical and assembly requirements of alcohol torches.
This standard applies to alcohol torch burners (hereinafter referred to as abbreviations) for combustion tests under laboratory conditions of non-metallic products used in coal mines.
burner).
2 Reference standards
GB 5675 gray cast iron classification
GB 699 steel grade and general technical conditions of high-quality carbon structural steel
Chemical composition of YB146 brass processed products
3 Technical requirements
3.1 Dimensions
The specific dimensions of the burner are shown in Figure 1. Under certain environmental conditions, especially the burned materials produce corrosive gases during the combustion process
Under the conditions, the combustion tube at the upper part of the burner intake hole will be corroded, and the outer wall of the combustion tube will form a cone-shaped outer surface.
If the inner diameter and the total height of the burning tube do not change, it is considered that this tapered outer surface does not have any adverse effect on the normal operation of the burner.
The nozzle diameter of the burner nozzle (see Figure 2) should be 0.7 ± 0.04mm.
3.2 Materials
Each part of the burner is made of the following materials.
Burning tube. brass, H62 or H68 YB146.
Base. Cast iron. HT200 GB 5675.
Fire ring screen. copper wire mesh or stainless steel wire mesh 30 mesh/in.
Wire mesh between combustion tube and base. 30 mesh/in.
Spool. Steel, 45 GB 699.
Nozzle. brass, H62 or H68 YB146.
3.3 Joint seal
Burner joint sealing requirements are as follows.
The seal between the burner and the base. a fully-enclosed sealing ring made of asbestos sheet with an inner diameter of ϕ14mm and an outer diameter of ϕ22mm, thickness
3mm (the seal at the bottom of the combustion tube does not need to be sealed with PTFE plastic tape, because the effective seal of the connection depends on
Effective positive pressure between steel/asbestos gaskets).
Seal between control valve spool and combustion tube. PTFE plastic tape.
Thread seal between burner base and handle. PTFE plastic tape.
Seal between nozzle and combustion tube. PTFE plastic tape.
When assembling the joints of the burner, it is necessary to ensure a close fit to prevent leakage.
3.4 Fuel
The fuel is a mixture of 95% industrial ethanol and 5% methanol.
Fuel must be filtered before it can be used.
After use, the remaining fuel in the fuel bottle must be poured back into the storage container.
3.5 Fuel bottle
The volume of the fuel bottle should be 100mL, and the side of the fuel bottle should be equipped with a scale arm.The minimum scale value is 0.1mL.
It is equipped with a 6.35mm (单 ″) wall-type single-fork cock switch, and a transparent polyethylene plastic hose with a length of about 1000mm (inside
(Φ6mm diameter) is connected between the fuel bottle and the burner (see Figure 3).
4 Assembly requirements
4.1 Assembly
Connect the fuel bottle and the burner with a transparent polyethylene plastic hose. The burner's working status can be inclined horizontally 45 ° or vertically
Place. In order to ensure the test to proceed smoothly, the liquid level of the fuel must be adjusted to a distance of 600 ± 20 mm above the center of the burner lamp.
Each connection of the burner must be closely fitted.
4.2 Inspection after assembly
After the burner is assembled, it must be checked whether the working condition is normal. Under flame stable combustion conditions, the burner should have.
a. Flame temperature is 960 ± 60 ℃;
b. Flame height is 150 ~ 180mm;
c. The burning consumption should be 2.55 ± 0.15mL/min.
When checking the fuel consumption, turn off the fuel bottle switch so that the fuel entering the burner can only come from the side arm marked with a scale to determine the fuel consumption.
Burner fuel consumption in 1min.
Appendix A
Burner operation
(Supplement)
A1 burner operation
Close the burner control valve and open the fuel bottle switch at the same time to check the fuel consumption.If the fuel consumption is not zero, then
There is a leak in the system.
Place the burner vertically in the preheating pan to inject fuel to three quarters, and then ignite the fuel. When the fuel in the preheating pan is exhausted
At 50%, the control valve of the burner is opened, and the flame is burned for 5 minutes before testing. If combustion is unstable, the control valve should be closed to
After the burner is preheated again, open the control valve of the burner to allow it to burn stably for 5 minutes before testing.
After a period of stable combustion, excessive heat entering the evaporation section will also lead to unstable combustion of the flame.
This phenomenon is called thermal oscillation phenomenon. Turn off the alcohol torch burner for a short time, lower the temperature of the evaporation part, and the flame can return to the original stable state.
A2 burner failure
A2.1 Leak
According to the method of A1, if the fuel consumption is greater than zero, there is a leak in the burner system. This leakage may lie in the burner section
One of the connections between the fuel supply and the fuel supply.
Except for the nozzle thread connection, any leakage at the connection can be found by igniting the leaking fuel.
Heavy leakage can be found based on the instability during flame combustion, but it is very difficult to find tiny leaks at the nozzle threads, so in
Good sealing performance must be ensured during assembly.
A2.2 Blocking
If the burner control valve is fully opened and the fuel consumption is still less than 2.55 ± 0.15mL/min, there will be resistance at the fuel outlet
Plugging or blockage, the direct cause of this blockage and blockage is that solid particulate impurities block the nozzle hole of the burner.
The main sources of solid particulate impurities include. cuttings during nozzle drilling, dust particles in fuel, residues after volatilization of alcohol
And rust on the bottom of the burner cast iron.
A2.3 Troubleshooting
When the working state of the burner does not meet the requirements specified in 4.2, the following steps can be taken to troubleshoot.
a. Disassemble the burner;
b.Remove the brass wire at the inlet pipe and the lamp body, remove the solid particulate impurities in the burner, and clean or replace the brass wire;
c. Remove the nozzle and clean it. In order to prevent the diameter of the nozzle hole from expanding and producing out of roundness, when cleaning the nozzle, you cannot use a steel needle to pin the nozzle hole;
d. Reassemble with appropriate sealing materials (refer to 3.3);
e. Check for leaks and check that the fuel consumption is correct.
A2.4 Cleaning method
Use a nozzle to inject the cleaning solution into the nozzle. If the effect is still not obvious by this method, you can use a filament with a hardness lower than that of brass.
(Such as paper rolls made of white paper, etc.), insert upward from the bottom of the nozzle hole, so as not to damage the outlet end of the nozzle hole.
Additional information.
This standard is proposed by the Technology Development Department of the Ministry of Coal Industry.
This standard was drafted by the Shanghai Research Institute of Coal Science Research Institute.
The main drafters of this standard are Gao Hong and Li Guowei.
This Standard is entrusted to the Shanghai Research Institute of the Coal Research Institute for interpretation.
This standard refers to the British standard BS58651981 "Small laboratory flame test structure and operation specification of alcohol torch".
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