CN201764467U - Vapour-water circulation system of coal mine ventilation air methane (VAM) oxidization device - Google Patents
Vapour-water circulation system of coal mine ventilation air methane (VAM) oxidization device Download PDFInfo
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- CN201764467U CN201764467U CN2010202591287U CN201020259128U CN201764467U CN 201764467 U CN201764467 U CN 201764467U CN 2010202591287 U CN2010202591287 U CN 2010202591287U CN 201020259128 U CN201020259128 U CN 201020259128U CN 201764467 U CN201764467 U CN 201764467U
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Abstract
The utility model relates to a vapour-water circulation system of a coal mine ventilation air methane (VAM) oxidization device, belonging to the technical field of ultralow concentration methane counterflow oxidization and low-density energy recovery. Water in a steam dome enters two evaporators for evaporation under the driving of a circulation water pump and returns to the steam dome by a water return pipe; vapour in the steam dome enters two overheaters to be heated into overheated vapour which is transmitted to the outside; water in a water tank sequentially enters an electric adjusting valve and a preheater under the driving of a water charging pump, and is heated by the overheated steam dome in the preheater and then enters the steam dome; a temperature control electric adjusting valve is utilized for controlling the temperature of charged water; according to signals of a liquid level meter and a steam flowmeter, a PLC (programmable logic controller) controls the openness of the electric adjusting valve, thus realizing continuous and stable water charging; and when heating is started, circulating water can pass through the overheater by switching the valve so as to protect the overheater. The vapour-water circulation system has the advantage of small steam parameter fluctuation, stable running, reliable operation and the like.
Description
Technical field
The utility model relates to a kind of steam-water circulation system of coal mine ventilation air methane oxidation device, belongs to super low concentration methane counter flow oxidation and low-density technical field of energy recovery.
Background technology
The main component of coal mine gas is a methane, is the gas energy.In order to improve the security of Coal Production, adopt a large amount of the ventilation to discharge coal mine gas (being called coal mine methane) usually.At present, often adopt accumulation of heat counter flow oxidation technology governance and utilize coal mine wind-lack gas, it is oxidized to carbon dioxide and water, and reclaim its heat in order to produce hot water and steam etc.When coal mine methane gas oxidation device moved, the oxidation bed middle part was a high-temperature area, and temperature is more than 1000 ℃, and the both sides temperature reduces gradually, approaches normal temperature until the oxidation end; Coal mine methane is oxidized bed heating after entering oxidation bed, and temperature raises gradually, until methane oxidation in the high-temperature region; The hot gas of oxidation continues to move to the another side of oxidation bed, and the heat transferred oxidation bed is lowered the temperature gradually.The key of this technology is constantly to switch to enter oxidation bed gas flow direction, to guarantee coal mine wind-lack gas oxidation in high-temperature region, oxidation bed middle part.Facts have proved that when methane concentration was 0.2% in the weary wind, the oxidation liberated heat can be kept the sub-fraction energy that the heat radiation of oxidation unit surface of shell and exit gas are taken away, oxidation unit still can turn round and not need energy outside the supplementary quota.If methane concentration is higher than at 0.2% o'clock, unnecessary heat can be used from the oxidation bed taking-up.
The heat-obtaining technology is very crucial, and it not only influences the thermal efficiency, also has influence on oxidation unit work operation stability.The Maritime Affairs University Of Dalian adopts thermo-electric generation system to utilize ventilation air gas oxidation liberated heat (200910010612.8), thermoelectric generator is arranged in the top and the bottom of oxidation unit high-temperature area, hot junction, thermo-electric generation unit contacts the interior insulation board in this zone, the external insulation plate that the cold junction contact of thermo-electric generation unit links to each other with heat exchanger, produce big thermograde between hot junction, thermo-electric generation unit and the cold junction, carry out thermoelectric conversion power generation, but do not see the report of its practical application.
Normal at present employing is extracted oxidation bed more than heat with the method that heat exchanger is placed in both sides, high-temperature region, oxidation bed center, and the great advantage of this heat taking method is the heat exchange efficiency height.The coal mine methane gas oxidation device of Sweden MEGTEC company exploitation is produced superheated steam by built-in steam pipe, promotes the generating of steam turbin generator group.Consider the needs of safe and stable operation, the built-in steam pipe of oxidation bed constitutes the part of traditional steam boiler, and other parts of generating steam circulation all adopt conventional art.
In recent years, China's independent research coal mine methane gas oxidation device of going into overdrive." coal mine ventilation air methane oxidation device " of Shengli Oilfield Shengli Power Machinery Co., Ltd (200620081956.X) adopts 2 built-in heat exchangers extraction oxidation heat liberations to be used to produce saturated vapor.But this patent only relates to the oxidation bed built-in heat exchanger, does not relate to steam-water circulation system.
Shandong Technology Univ discloses a kind of device that adopts a plurality of heat exchangers to extract the oxidation bed heat in " mine air-lack mash gas thermal oxidation apparatus " (200810249860.3), at both sides, ceramic oxidation bed central area difference symmetric arrangement 1 outside heat exchanger and 1 inboard heat exchanger, its heat exchanger tube is made snakelike, there is square fin straight line pipeline section outside, is arranging ceramic honey comb in the space between heat exchanger tube; Stagger mutually between the heat exchanger tube of outside heat exchanger and inboard heat exchanger, all fin heat exchange pipes are all surrounded by pottery; Have easy for installation, expense is low, easily advantage such as replacing has solved the excessive problem of heat exchanger temperature difference.But this patent only relates to the oxidation bed built-in heat exchanger.In order to improve the coal mine methane gas oxidation device stable operation of China's independent research, be necessary to research and develop the steam-water circulation system of coal mine methane gas oxidation device.
The utility model content
The purpose of this utility model provide a kind of can be according to the characteristics of coal mine methane gas oxidation device operation, the steam-water circulation system of coal mine ventilation air methane oxidation device of excellent working performance.Its technical scheme is:
A kind of steam-water circulation system of coal mine ventilation air methane oxidation device, comprise and be provided with liquid level gauge, the drum of Pressure gauge and safety valve, the evaporimeter loop, the moisturizing loop, the blow-off pipe of steam output pipe road and connection drum bottom, wherein the evaporimeter loop comprises water inlet pipe, return pipe and the evaporimeter that is arranged in the oxidation bed, the arrival end of evaporimeter is communicated with the bottom of drum through water inlet pipe, the port of export is communicated with the top of drum through return pipe, the moisturizing loop comprises filling pipe, water tank and small pump, wherein the arrival end of small pump is communicated with water tank by filling pipe, the port of export is communicated with the bottom of drum by filling pipe, the steam output pipe road comprises and is provided with thermocouple, Pressure gauge, steam-flow meter, the overheated steam pipe of the 4th valve, it is characterized in that: set up PLC, the superheater loop, water circulating pump, flowmeter, electric control valve, temperature-control electric control valve and the preheater that is provided with heating tube, wherein water circulating pump and flowmeter are arranged on the water inlet pipe, preheater and electric control valve are serially connected on the port of export and the filling pipe between the drum of small pump, the port of export of heating tube is through condensate pipe water receiving case, arrival end is taken over live steam pipe through the pre-live steam pipe that is provided with the temperature-control electric control valve, the superheater loop is serially connected between drum top and the overheated steam pipe, comprise the saturated steam pipe that is provided with first valve and be arranged on the interior superheater of oxidation bed, between first valve is near the saturated steam pipe of superheater side and water inlet pipe, be provided with first tube connector, between the top of overheated steam pipe and return pipe, be provided with second tube connector with the 3rd valve with second valve; Liquid level gauge, flowmeter, steam-flow meter, thermocouple link to each other with PLC by data wire, and electric control valve links to each other with PLC by holding wire with the temperature-control electric control valve.
Described steam-water circulation system of coal mine ventilation air methane oxidation device, evaporimeter and superheater are two groups, the upper and lower sides that is arranged on the oxidation bed high-temperature region of two groups of superheater symmetries, and two groups of evaporimeters are arranged symmetrically in the outside of two groups of superheaters.
The course of work of this utility model is:
When the coal mine methane gas oxidation device operate as normal, first valve and the 4th valve are in opening, and second valve and the 3rd valve are in closed condition.Water in the drum is under the driving of water circulating pump, enter two evaporimeters respectively through flowmeter and water inlet pipe, in evaporimeter, be heated, a part of water evaporation becoming steam, the carbonated drink two-phase mixture that flows out from evaporimeter enters drum through return pipe and carries out carbonated drink separation.The steam on drum top enters two superheaters respectively through the saturated steam pipe and first valve, is heated to form superheated steam in superheater, and the superheated steam of generation is given the external world through overheated steam pipe, the 4th valve, steam-flow meter.Water in the water tank enters electric control valve under the driving of small pump, enter in the preheater after water amount is regulated, and enters drum by filling pipe be heated to certain temperature by superheated steam in preheater after.Part superheated steam in the overheated steam pipe enters preheater through pre-live steam pipe, temperature-control electric control valve, carries out heat exchange and condensation with moisturizing in heating tube, and condensed water is got back in the water tank by condensate pipe.The temperature-control electric control valve is controlled the superheated steam amount that enters preheater, and is constant thereby assurance is added into the water temperature of drum.PLC controls the aperture of electric control valve according to the signal of liquid level gauge and steam-flow meter, thereby realizes the moisturizing of continous-stable, reduces the fluctuation of steam parameter in the drum.
In the coal mine methane gas oxidation device start-up course, the heat heating that oxidation bed is provided by electric heater or external firing device, temperature raises gradually, temperature reaches nearly 1000 ℃ until high-temperature region, oxidation bed middle part, and the temperature field that temperature height, both sides temperature reduce gradually in the middle part of forming, cut off electric heater or external firing device then.When beginning to start, with first valve and the 4th valve closing, with second valve and the 3rd valve opening, the water in the drum is divided into two-way under the driving of water circulating pump, and Yi Lushui enters two evaporimeters, comes out to enter return pipe from evaporimeter; Another road water enters two superheaters through first tube connector and second valve, comes out to enter return pipe through the 3rd valve and second tube connector from superheater, mixes with the water that comes out from evaporimeter, enters drum together.Can prevent like this superheater in the heating starting process by dry combustion method, effectively protect superheater.
After the steam pressure in the drum reaches rated value, with first valve and the 4th valve opening, with second valve and the 3rd valve closing.Recirculated water evaporates by evaporimeter, and saturated vapor enters superheater and is heated to form superheated steam, and the carbonated drink circulation enters normal operating conditions.
The utility model compared with prior art, major advantage and beneficial effect are:
(1) steam-water circulation system of the present utility model has two groups of evaporimeters and two groups of superheaters, can be at the both sides up and down of coal mine methane oxidation unit oxidation bed high-temperature region difference one group of evaporimeter of symmetric arrangement and one group of superheater, both extracted the part heat of both sides, oxidation bed high-temperature region, and helped the oxidation bed high-temperature region again and remain on the oxidation bed central area.Evaporimeter is arranged in the outside of superheater, helps forming the temperature field that oxidation bed central temperature height, two thermometric degree reduce gradually and distributes, and improves the oxidation unit operation stability.
(2) oxidation bed of most of coal mine methane oxidation units is a vertical structure, and the evaporation tube of evaporimeter is arranged horizontally in oxidation bed, has the danger of the stifled and dry combustion method of gas, set up water circulating pump and adopt forced circulation, the high magnification circulation can be realized, and quantity of circulating water, reliable operation can be regulated.
(3) be provided with between water inlet pipe before evaporimeter and the saturated steam pipe before the superheater between return pipe after first tube connector and second valve, the evaporimeter and the overheated steam pipe after the superheater and be respectively equipped with second tube connector and the 3rd valve.In start-up course, in drum, also do not form before the stable steam, can make recirculated water pass through superheater by opening the second and the 3rd valve, closing the first and the 4th valve, avoid the superheater dry combustion method.After steam in drum reaches requirement, by closing the second and the 3rd valve, opening the first and the 4th valve, make saturated vapor enter superheater again.
(4) in drum during moisturizing, enter drum again after utilizing superheated steam in preheater, the water that replenishes to be heated to uniform temperature, reduced the temperature shock of the new water that replenishes to drum; Regulate the superheated steam amount that enters preheater by the temperature-control electric control valve, realize that the moisturizing water temperature after the preheating is constant; PLC is according to the signal of liquid level gauge and steam-flow meter, and the aperture of control electric control valve can realize the moisturizing of continous-stable.The steam parameter that these technical schemes help reducing in the drum fluctuates.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
Among the figure: 1, PLC 2, water tank 3, condensate pipe 4, small pump 5, electric control valve 6, heating tube 7, preheater 8, temperature-control electric control valve 9, thermocouple 10, Pressure gauge 11, filling pipe 12, flowmeter 13, water circulating pump 14, water inlet pipe 15, oxidation bed 16, blow-off pipe 17, liquid level gauge 18, drum 19, safety valve 20, pre-live steam pipe 21, first tube connector 22, first valve 23, second valve 24, saturated steam pipe 25, return pipe 26, evaporimeter 27, superheater 28, second tube connector 29, the 3rd valve 30, the 4th valve 31, steam-flow meter 32, by-pass valve control 33, overheated steam pipe
The specific embodiment
In the embodiment shown in fig. 1: evaporimeter 26 and superheater 27 are two groups, the upper and lower sides that is arranged on oxidation bed 15 high-temperature regions of two groups of superheater 27 symmetries, and two groups of evaporimeters 26 are arranged symmetrically in the outside of two groups of superheaters 27.Liquid level gauge 17 is arranged in the drum 18, and drum 18 is provided with Pressure gauge 10 and safety valve 19, and blow-off pipe 16 is communicated with the bottom of drum 18.The evaporimeter loop comprises the water inlet pipe 14 that is provided with water circulating pump 13 and flowmeter 12, return pipe 25, two groups of evaporimeters 26, the arrival end of two groups of evaporimeters 26 all is communicated with the bottom of drum 18 through water inlet pipe 14, the port of export all is communicated with the top of drum 18 through return pipe 25, the moisturizing loop comprises the filling pipe 11 that is provided with electric control valve 5, water tank 2, be provided with the preheater 7 and the small pump 4 of heating tube 6, wherein the arrival end of small pump 4 is communicated with water tank 2 by filling pipe 11, the port of export passes through successively through electric control valve 5, preheater 7 is communicated with the bottom of drum 18, the steam output pipe road comprises and is provided with thermocouple 9, Pressure gauge 10, steam-flow meter 31, the overheated steam pipe 33 of the 4th valve 30, the port of export of heating tube 6 is through condensate pipe 3 water receiving casees 2, arrival end is taken over live steam pipe 33 through the pre-live steam pipe 20 that is provided with temperature-control electric control valve 8, the superheater loop is serially connected between drum 18 tops and the overheated steam pipe 33, comprise saturated steam pipe 24 and two groups of superheaters 27 of being provided with first valve 22, between first valve 22 is near the saturated steam pipe 24 of superheater 27 sides and water inlet pipe 14, be provided with first tube connector 21 with second valve 23, between the top of overheated steam pipe 33 and return pipe 25, be provided with second tube connector 28 with the 3rd valve 29, liquid level gauge 17, flowmeter 12, steam-flow meter 31, thermocouple 9 links to each other with PLC1 by data wire, and electric control valve 5 links to each other with PLC 1 by holding wire with temperature-control electric control valve 8.
Claims (2)
1. steam-water circulation system of coal mine ventilation air methane oxidation device, comprise and be provided with liquid level gauge (17), the drum (18) of Pressure gauge (10) and safety valve (19), the evaporimeter loop, the moisturizing loop, the blow-off pipe (16) of steam output pipe road and connection drum (18) bottom, wherein the evaporimeter loop comprises water inlet pipe (14), return pipe (25) and be arranged on evaporimeter (26) in the oxidation bed (15), the arrival end of evaporimeter (26) is communicated with the bottom of drum (18) through water inlet pipe (14), the port of export is communicated with the top of drum (18) through return pipe (25), the moisturizing loop comprises filling pipe (11), water tank (2) and small pump (4), wherein the arrival end of small pump (4) is communicated with water tank (2) by filling pipe (11), the port of export is communicated with the bottom of drum (18) by filling pipe (11), the steam output pipe road comprises and is provided with thermocouple (9), Pressure gauge (10), steam-flow meter (31), the overheated steam pipe (33) of the 4th valve (30), it is characterized in that: set up PLC (1), the superheater loop, water circulating pump (13), flowmeter (12), electric control valve (5), temperature-control electric control valve (8) and be provided with the preheater (7) of heating tube (6), wherein water circulating pump (13) and flowmeter (12) are arranged on the water inlet pipe (14), preheater (7) and electric control valve (5) are serially connected on the port of export and the filling pipe (11) between the drum (18) of small pump (4), the port of export of heating tube (6) is through condensate pipe (3) water receiving case (2), arrival end is taken over live steam pipe (33) through the pre-live steam pipe (20) that is provided with temperature-control electric control valve (8), the superheater loop is serially connected between drum (18) top and the overheated steam pipe (33), comprise the saturated steam pipe (24) that is provided with first valve (22) and be arranged on the interior superheater (27) of oxidation bed (15), between first valve (22) is near the saturated steam pipe (24) of superheater (27) side and water inlet pipe (14), be provided with first tube connector (21), between the top of overheated steam pipe (33) and return pipe (25), be provided with second tube connector (28) with the 3rd valve (29) with second valve (23); Liquid level gauge (17), flowmeter (12), steam-flow meter (31), thermocouple (9) link to each other with PLC (1) by data wire, and electric control valve (5) links to each other with PLC (1) by holding wire with temperature-control electric control valve (8).
2. steam-water circulation system of coal mine ventilation air methane oxidation device according to claim 1, it is characterized in that: evaporimeter (26) and superheater (27) are two groups, the upper and lower sides that is arranged on oxidation bed (15) high-temperature region of two groups of superheaters (27) symmetry, two groups of evaporimeters (26) are arranged symmetrically in the outside of two groups of superheaters (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202591287U CN201764467U (en) | 2010-07-01 | 2010-07-01 | Vapour-water circulation system of coal mine ventilation air methane (VAM) oxidization device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202591287U CN201764467U (en) | 2010-07-01 | 2010-07-01 | Vapour-water circulation system of coal mine ventilation air methane (VAM) oxidization device |
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| CN201764467U true CN201764467U (en) | 2011-03-16 |
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| CN2010202591287U Expired - Lifetime CN201764467U (en) | 2010-07-01 | 2010-07-01 | Vapour-water circulation system of coal mine ventilation air methane (VAM) oxidization device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915411A (en) * | 2010-07-01 | 2010-12-15 | 山东理工大学 | Steam-water circulation system of coal mine ventilation air methane oxidation device |
| CN102225321A (en) * | 2011-04-11 | 2011-10-26 | 山东理工大学 | Preheating catalytic-oxidation device with burner starting for coal mine ventilation air methane |
| CN102980166A (en) * | 2012-12-25 | 2013-03-20 | 山东理工大学 | Steam-water circulating system utilizing waste heat of high-temperature calcined coke generated by pot calciner |
| CN103277130A (en) * | 2013-05-24 | 2013-09-04 | 中国矿业大学 | Mining area distributed coal mine gas near-zero emission poly-generation energy supply system |
| CN107036069A (en) * | 2017-05-18 | 2017-08-11 | 杭州江东富丽达热电有限公司 | Boiler steam and water circuit |
-
2010
- 2010-07-01 CN CN2010202591287U patent/CN201764467U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915411A (en) * | 2010-07-01 | 2010-12-15 | 山东理工大学 | Steam-water circulation system of coal mine ventilation air methane oxidation device |
| CN102225321A (en) * | 2011-04-11 | 2011-10-26 | 山东理工大学 | Preheating catalytic-oxidation device with burner starting for coal mine ventilation air methane |
| CN102980166A (en) * | 2012-12-25 | 2013-03-20 | 山东理工大学 | Steam-water circulating system utilizing waste heat of high-temperature calcined coke generated by pot calciner |
| CN102980166B (en) * | 2012-12-25 | 2014-09-24 | 山东理工大学 | Steam-water circulating system utilizing waste heat of high-temperature calcined coke generated by pot calciner |
| CN103277130A (en) * | 2013-05-24 | 2013-09-04 | 中国矿业大学 | Mining area distributed coal mine gas near-zero emission poly-generation energy supply system |
| CN103277130B (en) * | 2013-05-24 | 2015-03-04 | 中国矿业大学 | Mining area distributed coal mine gas near-zero emission poly-generation energy supply system |
| CN107036069A (en) * | 2017-05-18 | 2017-08-11 | 杭州江东富丽达热电有限公司 | Boiler steam and water circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110316 Effective date of abandoning: 20120201 |