CN104089182A - Conveying system for blast furnace coal gas pipe network and operation method thereof - Google Patents
Conveying system for blast furnace coal gas pipe network and operation method thereof Download PDFInfo
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- CN104089182A CN104089182A CN201410276177.4A CN201410276177A CN104089182A CN 104089182 A CN104089182 A CN 104089182A CN 201410276177 A CN201410276177 A CN 201410276177A CN 104089182 A CN104089182 A CN 104089182A
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Abstract
The invention discloses a conveying system for a blast furnace coal gas pipe network, which comprises a coal gas pressing machine, a machine front main pipe, a machine rear main pipe and a control device, wherein the coal gas pressing machine is connected with the machine front main pipe and the machine rear main pipe, and a pressure relief and water-sealed valve is arranged between the machine front main pipe and the machine rear main pipe. With the adoption of the technical scheme provided by the invention, technical problems that accidents of pressing machine surge, machine rear coal gas pipeline impact and fluctuation, coal gas leakage and the like have high possibility, meanwhile, as a return valve in a protection system is a sealed butterfly valve, the action slowing-down time is about 30 seconds, and when abnormal situations occur, coal gas overpressure and leakage can be caused within 20-30 seconds in the prior art can be effectively solved. The conveying system has the benefits that through the pressure relief and water-sealed valve, a conveying pipeline can safely and reliably operate; during the operation on a low water level, the pressing machine is not turned on, and the conveying capacity reaches about 60 percent, so that about hundreds of millions of electricity are saved yearly; meanwhile, the conveying system has the characteristics of low manufacturing cost, stable operation, long service life and the like.
Description
Technical field
The invention belongs to the device fabrication and the operating method technical field that are applied to blast furnace gas pipeline network system, specifically, relate to a kind of transporting system for blast furnace gas pipeline network and operating method thereof; The conveying equipment that the present invention is specifically related to is for gas pressing conveying process.
Background technique
In blast furnace gas pipeline network system, smelter gas pressing transporting system is equipped with gaspipe network and many gas compressors of heavy caliber (2m-4m).As everyone knows, there is device fabrication wave properties in blast furnace aborning, coke oven, converter etc., and the coal gas such as other various stoves, kiln, kitchen range uses device fabrication also to have wave properties, therefore, be typically provided with various types of for storing and the gas cabinet of leveling gas pressure at coal gas supervisor net, realize the round-the-clock hanging net operation of gas cabinet and quick handling capacity, guarantee to be responsible for net gas pressure stable.Meanwhile, prevent the guarantee gaspipe network safe operation under various faults and emergency conditions.
At present, in supervisor's net, be provided with burning bleeding device, its bleeding device control valve has quick opening function.If the generating capacity of certain enterprise's blast furnace gas is 1,600,000 m
3/ h, is provided with 300,000 m
3blast furnace gas POC cabinet and 500,000 m
3the blast furnace gas combustion diffusing tower of/h, facts have proved that the configuration of such blast furnace gas pipeline network system is safe and reliable.But as the use such as electricity generation boiler, CCPP unit coal gas system, use blast furnace gas per hour is about 600,000 m for the large shape coal-gas user of a certain class
3left and right, and by many gas compressor pressurized delivered.There is following technical problem in gas pressing transporting system of the prior art:
1, in prior art, in the time of normal production, it is multinomial that the coal gas of every generation boiler is cut the chain controlled conditions 10 of valve soon, no matter be water generating, electricity, the system temperatures such as instrument, pressure, the exceeding standard of flow parameter all can be caused coal gas and be cut soon valve and close, and boiler is cut soon closing of valve and will be caused gas pressure fast rise after pressuring machine, further cause second action that boiler is cut valve soon, if the overpressure protection system of Gas Pressurization Station design imperfection, control not in time, will cause pressuring machine surge, after machine, gas pipe line impacts the accidents such as fluctuation and gas leakage, when serious, will lead to casualties.
2, in prior art; the overpressure protection system of Gas Pressurization Station normally has two covering devices, and the one, before and after machine, between house steward, be provided with a set of reflux valve control system, but reflux valve is airtight butterfly valve; slow in one's movementsly be about 30 seconds, and before machine, the regulating power of modulating valve is very little.In the time there are abnormal conditions, under exceptional condition, when particularly a certain seat boiler coal gas is cut soon valve and closed, will cause within the scope of 20-30 second that coal gas superpressure leaks etc., cause the generation of production accident.
Summary of the invention
Technical problem to be solved by this invention is, in prior art, it is multinomial that the coal gas of every generation boiler is cut the chain controlled conditions 10 of valve soon, if wherein exceeding standard of an index all can be caused coal gas and cut soon valve and close, and boiler cuts soon closing of valve and will cause gas pressure fast rise after pressuring machine, further cause the action that second boiler cut valve soon, easily cause pressuring machine surge, after machine, gas pipe line impacts the accidents such as fluctuation and gas leakage, when serious, will lead to casualties; Simultaneously because overpressure protection system of the prior art is provided with a set of reflux valve control system, but reflux valve is airtight butterfly valve, is slow in one's movementsly about 30 seconds, and before machine, the regulating power of modulating valve is very little.In the time there are abnormal conditions, will cause coal gas superpressure within the scope of 20-30 second to leak etc., cause the technical problems such as the generation of production accident, and a kind of transporting system for blast furnace gas pipeline network and operating method thereof are provided.
Technical conceive of the present invention is that, in order to solve the above-mentioned pressuring machine surge that easily causes, after machine, gas pipe line impacts the accidents such as fluctuation and gas leakage; Simultaneously because the reflux valve in protective system is airtight butterfly valve, be slow in one's movementsly about 30 seconds, in the time there are abnormal conditions, will cause within the scope of 20-30 second the coal gas superpressure technical problem that leaks etc.; Technical conceive provided by the present invention is, before the gas compressor machine in gas pressing transporting system and after machine, between house steward, setting up pressure release water-sealing valve, realizes abnormal failure Coal Under atmospheric pressure stable, not superpressure, do not leak; Meanwhile, regulate the water level of pressure release water-sealing valve, realize 60% coal gas system gravity flow ability.
Technological scheme provided by the present invention is, a kind of transporting system for blast furnace gas pipeline network, comprise house steward and control gear after gas compressor, the front house steward of machine, machine, be connected with house steward after house steward, described machine before described machine at described gas compressor, before described machine, after house steward and machine, between house steward, be provided with pressure release water-sealing valve.
Described pressure release water-sealing valve is formed by Plate Welding, and it is 40 ° of-60 ° of centrums that the bottom of described pressure release water-sealing valve is provided with inclination, is provided with bleeding device at the top of described centrum, and the diameter of described bleeding device is 100mm.
The top of described pressure release water-sealing valve is provided with inlet pipeline and outlet conduit, is provided with and takes out stifled blind plate special flange device within the scope of the 300-600mm more than top of described pressure release water-sealing valve.
Described pressure release water-sealing valve is provided with suction tude and steam outlet pipe, and described suction tude is inserted 200-400mm place in described pressure release water-sealing valve, and described steam outlet pipe inserts the following 400-800mm of high water level place in pressure release water-sealing valve; The mouth of pipe distance of described suction tude and described steam outlet pipe differs 600-1000mm, and the mouth of pipe of described suction tude and the mouth of pipe of described steam outlet pipe are all made as expansion type.
Described steam outlet pipe inserts after the machine that in pressure release water-sealing valve, the minimum value below high water level is described gas compressor the difference of pressure before pressure and machine, and maximum value is the difference of alarming value and the front pressure of machine after machine.
Described pressure release water-sealing valve is provided with the identical highstand shedding water seal arrangement of two cover functions, low water level overflow water seal apparatus, and the effective height of overflow water seal is that after machine, maximum service pressure adds 500mm, its diameter 80-150mm.
Described pressure release water-sealing valve is provided with intake pipe, and described intake pipe is set to U-shaped reverse-stop type.
Described pressure release water-sealing valve bottom is provided with a diameter 300-500mm, and the horizontal hydathode that length is 400-600mm is provided with the blowdown valve of a diameter 80-150mm in the termination of described horizontal hydathode.
A kind of operating method of the transporting system for blast furnace gas pipeline network, described transporting system comprises house steward and control gear after gas compressor, the front house steward of machine, machine, be connected with house steward after house steward, machine before machine at described gas compressor, before described machine, after house steward and machine, between house steward, be provided with pressure release water-sealing valve, described pressure release water-sealing valve comprises 1# inlet valve, low water level 2# relief valve, high water level 3# relief valve, 4# water-feeding valve;
A, low water level are to high water level operating method;
Close low water level 2# relief valve, open high water level 3# relief valve, open 1# inlet valve, until close 1# inlet valve after highstand shedding, open the bypass 4# water-feeding valve of 1# valve simultaneously;
B, high water level are to the operating method of low water level;
Open low water level 2# relief valve, close 3# highstand shedding valve;
C, the emptying ability method of water-sealing valve;
Two of band coal gas water blockoff envelope turnover air pipe flange blind plates, close 1# inlet valve 4# water-feeding valve, open diffusion valve and 5# blowdown valve, and water-sealing valve and atmosphere are connected.
Adopt technological scheme provided by the present invention, can effectively solve in prior art, it is multinomial that the coal gas of every generation boiler is cut the chain controlled conditions 10 of valve soon, if wherein exceeding standard of an index all can be caused coal gas and cut soon valve and close, and boiler is cut soon closing of valve and will be caused gas pressure fast rise after pressuring machine, further cause second action that boiler is cut valve soon, easily cause pressuring machine surge, after machine, gas pipe line impacts the accidents such as fluctuation and gas leakage, when serious, will lead to casualties; Simultaneously because overpressure protection system of the prior art is provided with a set of reflux valve control system, but reflux valve is airtight butterfly valve, is slow in one's movementsly about 30 seconds, and before machine, the regulating power of modulating valve is very little.In the time there are abnormal conditions, will cause coal gas superpressure within the scope of 20-30 second to leak etc., cause the technical problems such as the generation of production accident.Pressure release water-sealing valve of the present invention can make transfer line safe and reliable to operation.When low water level operation, pressuring machine is not started shooting, and conveying capacity reaches approximately 60%, and year using electricity wisely is approximately millions of.Also there is the feature such as low cost of manufacture, stable, long service life simultaneously.
Brief description of the drawings
By reference to the accompanying drawings, the present invention is described further:
Fig. 1 is pressure release water seal valve arrangement schematic diagram of the present invention;
Wherein, 1 is pressure release water-sealing valve; 2 is inlet pipeline; 3 is outlet conduit.
Embodiment
As shown in Figure 1, technological scheme provided by the present invention is a kind of transporting system for blast furnace gas pipeline network, comprise house steward and control gear after gas compressor, the front house steward of machine, machine, be connected with house steward after house steward, described machine before described machine at described gas compressor, before described machine, after house steward and machine, between house steward, be provided with pressure release water-sealing valve 1.
Described pressure release water-sealing valve 1 is formed by Plate Welding, and it is 40 ° of-60 ° of centrums that the bottom of described pressure release water-sealing valve 1 is provided with inclination, is provided with bleeding device at the top of described centrum, and the diameter of described bleeding device is 100mm.Its length, width and height are respectively 2.5-3 times of the front house steward of machine, 1.5-2 times and 3-4 times.Device bottom is the bleeding device that the centrum top of 40 °-60 ° is provided with a diameter 100mm.
The top of described pressure release water-sealing valve 1 is provided with inlet pipeline 2 and outlet conduit 3, is provided with and takes out stifled blind plate special flange device within the scope of the 300-600mm more than top of described pressure release water-sealing valve 1.
Described pressure release water-sealing valve 1 is provided with suction tude and steam outlet pipe, and described suction tude is inserted the interior 200-400mm of described pressure release water-sealing valve 1 place, and described steam outlet pipe inserts the pressure release water-sealing valve following 400-800mm of 1 interior high water level place; The mouth of pipe distance of described suction tude and described steam outlet pipe differs 600-1000mm, and the mouth of pipe of described suction tude and the mouth of pipe of described steam outlet pipe are all made as expansion type.
Described steam outlet pipe inserts after the machine that the minimum value below pressure release water-sealing valve 1 interior high water level is described gas compressor the difference of pressure before pressure and machine, and maximum value is the difference of alarming value and the front pressure of machine after machine.
Described pressure release water-sealing valve 1 is provided with the identical highstand shedding water seal arrangement of two cover functions, low water level overflow water seal apparatus, and the effective height of overflow water seal is that after machine, maximum service pressure adds 500mm, its diameter 80-150mm.
Described pressure release water-sealing valve 1 is provided with intake pipe, and described intake pipe is set to U-shaped reverse-stop type, has the function in can anti-water inlet pipe of coal gas while cutting off the water.Its maximum water supply capacity should possess made the water level of device rise to high water level from zero-bit in 15 minutes.And at the 4# water-feeding valve of other in parallel one 4 points-1 cun of 1# inlet valve.
Described pressure release water-sealing valve 1 bottom is provided with a diameter 300-500mm, and the horizontal hydathode that length is 400-600mm is provided with the blowdown valve of a diameter 80-150mm in the termination of described horizontal hydathode.
A kind of operating method of the transporting system for blast furnace gas pipeline network, described transporting system comprises house steward and control gear after gas compressor, the front house steward of machine, machine, be connected with house steward after house steward, machine before machine at described gas compressor, before described machine, after house steward and machine, between house steward, be provided with pressure release water-sealing valve 1, described pressure release water-sealing valve 1 comprises 1# inlet valve, low water level 2# relief valve, high water level 3# relief valve, 4# water-feeding valve;
A, low water level are to high water level operating method;
Close low water level 2# relief valve, open high water level 3# relief valve, open 1# inlet valve, until close 1# inlet valve after highstand shedding, open the bypass 4# water-feeding valve of 1# valve simultaneously;
B, high water level are to the operating method of low water level;
Open low water level 2# relief valve, close high water level 3# relief valve;
C, the emptying ability method of water-sealing valve;
Two of band coal gas water blockoff envelope turnover air pipe flange blind plates, close 1# inlet valve 4# water-feeding valve, open diffusion valve and 5# blowdown valve, and water-sealing valve and atmosphere are connected.
Gas pressing transporting system provided by the present invention, the pipe network self-flow device of gas pressure superelevation in the time letting out device and conveying capacity 60%, the operating method under two kinds of running statees of this covering device.
The object of the invention is: set up pressure release water-sealing valve 1, realize abnormal failure Coal Under atmospheric pressure stable, not superpressure, do not leak.Regulate the water level of pressure release water-sealing valve 1, realize 60% coal gas system gravity flow ability.
Between the forward and backward house steward of gas compressor System Computer, set up 2 meters of pressure release water-sealing valves 1 of a set of diameter.
Claims (9)
1. the transporting system for blast furnace gas pipeline network, comprise house steward and control gear after gas compressor, the front house steward of machine, machine, be connected with house steward after house steward, described machine before described machine at described gas compressor, it is characterized in that, before described machine, after house steward and machine, between house steward, be provided with pressure release water-sealing valve (1).
2. a kind of transporting system for blast furnace gas pipeline network according to claim 1, it is characterized in that, described pressure release water-sealing valve (1) is formed by Plate Welding, it is 40 ° of-60 ° of centrums that the bottom of described pressure release water-sealing valve (1) is provided with inclination, top described centrum is provided with bleeding device, and the diameter of described bleeding device is 100mm.
3. a kind of transporting system for blast furnace gas pipeline network according to claim 1 and 2, it is characterized in that, the top of described pressure release water-sealing valve (1) is provided with inlet pipeline (2) and outlet conduit (3), is provided with and takes out stifled blind plate special flange device within the scope of the 300-600mm more than top of described pressure release water-sealing valve (1).
4. a kind of transporting system for blast furnace gas pipeline network according to claim 3, it is characterized in that, described pressure release water-sealing valve (1) is provided with suction tude and steam outlet pipe, described suction tude is inserted the interior 200-400mm of described pressure release water-sealing valve (1) place, and described steam outlet pipe inserts the pressure release water-sealing valve following 400-800mm of 1 interior high water level place; The mouth of pipe distance of described suction tude and described steam outlet pipe differs 600-1000mm, and the mouth of pipe of described suction tude and the mouth of pipe of described steam outlet pipe are all made as expansion type.
5. a kind of transporting system for blast furnace gas pipeline network according to claim 4, it is characterized in that, described steam outlet pipe inserts after the machine that the minimum value below interior the high water level of pressure release water-sealing valve (1) is described gas compressor the difference of pressure before pressure and machine, and maximum value is the difference of alarming value and the front pressure of machine after machine.
6. a kind of transporting system for blast furnace gas pipeline network according to claim 5, it is characterized in that, described pressure release water-sealing valve (1) is provided with the identical highstand shedding water seal arrangement of two cover functions, low water level overflow water seal apparatus, the effective height of overflow water seal is that after machine, maximum service pressure adds 500mm, its diameter 80-150mm.
7. a kind of transporting system for blast furnace gas pipeline network according to claim 6, is characterized in that, described pressure release water-sealing valve (1) is provided with intake pipe, and described intake pipe is set to U-shaped reverse-stop type.
8. a kind of transporting system for blast furnace gas pipeline network according to claim 7, it is characterized in that, described pressure release water-sealing valve (1) bottom is provided with a diameter 300-500mm, length is the horizontal hydathode of 400-600mm, is provided with the blowdown valve of a diameter 80-150mm in the termination of described horizontal hydathode.
9. the operating method for the transporting system of blast furnace gas pipeline network, described transporting system comprises house steward and control gear after gas compressor, the front house steward of machine, machine, be connected with house steward after house steward, machine before machine at described gas compressor, it is characterized in that, before described machine, after house steward and machine, between house steward, be provided with pressure release water-sealing valve (1), described pressure release water-sealing valve (1) comprises 1# inlet valve, low water level 2# relief valve, high water level 3# relief valve, 4# water-feeding valve;
A, low water level are to high water level operating method;
Close low water level 2# relief valve, open high water level 3# relief valve, open 1# inlet valve, until close 1# inlet valve after highstand shedding, open the bypass 4# water-feeding valve of 1# valve simultaneously;
B, high water level are to the operating method of low water level;
Open low water level 2# relief valve, close high water level 3# relief valve;
C, the emptying ability method of water-sealing valve;
Two of band coal gas water blockoff envelope turnover air pipe flange blind plates, close 1# inlet valve 4# water-feeding valve, open diffusion valve and 5# blowdown valve, and water-sealing valve and atmosphere are connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410276177.4A CN104089182A (en) | 2014-06-19 | 2014-06-19 | Conveying system for blast furnace coal gas pipe network and operation method thereof |
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| CN201410276177.4A CN104089182A (en) | 2014-06-19 | 2014-06-19 | Conveying system for blast furnace coal gas pipe network and operation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543443A (en) * | 2015-12-29 | 2016-05-04 | 中冶南方工程技术有限公司 | Antisurge control system of converter gas pressuring machine and method |
| CN118188559A (en) * | 2024-05-15 | 2024-06-14 | 宁波钢铁有限公司 | Converter gas pressurizing machine operation system, control method and converter gas pressurizing machine |
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| CN105543443A (en) * | 2015-12-29 | 2016-05-04 | 中冶南方工程技术有限公司 | Antisurge control system of converter gas pressuring machine and method |
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| CN118188559A (en) * | 2024-05-15 | 2024-06-14 | 宁波钢铁有限公司 | Converter gas pressurizing machine operation system, control method and converter gas pressurizing machine |
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Application publication date: 20141008 |