CN103074135A - Low-concentration methane gas dewatering method and complete equipment - Google Patents
Low-concentration methane gas dewatering method and complete equipment Download PDFInfo
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- CN103074135A CN103074135A CN201210577295XA CN201210577295A CN103074135A CN 103074135 A CN103074135 A CN 103074135A CN 201210577295X A CN201210577295X A CN 201210577295XA CN 201210577295 A CN201210577295 A CN 201210577295A CN 103074135 A CN103074135 A CN 103074135A
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Abstract
The invention discloses a low-concentration methane gas dewatering method and complete equipment. The method comprises the following steps: first, filling the low-concentration methane gas from a coal layer into a filter, and desorbing particles and water mist in the methane gas; next, filling the obtained methane gas from the former step into a precooler for precooling, and performing heat exchange with the cooled low-concentration methane gas, so as to realize first-time temperature reduction; third, filling the low-concentration methane gas subjected to first-time temperature reduction into a gas-water heat exchanger to perform heat exchange with refrigerant water, and performing temperature reduction and dehumidification; fourth, filling the low-concentration methane gas subjected to performing temperature reduction and dehumidification into the gas-water separator to remove the water mist; fifth, allowing the low-concentration methane gas subjected to water mist removal again to pass through a heat exchange pipe to enter the precooler where heat exchange is performed with the low-concentration methane gas entered from the filter through the surface of the heat exchange pipe, so as to realize the first-time temperature reduction of the newly entered low-concentration methane gas; and finally, feeding the low-concentration methane gas which is raised in temperature after heat exchange in the heat exchange pipe into a generator set for power generation. The method has high dewatering efficiency and is wide in application.
Description
Technical field
The present invention relates to a kind of environmental protection equipment, deliver to dewatering and the device that power plant is invented after especially a kind of moisture low concentration gas dehydration that colliery can be produced, specifically a kind of low concentration gas dewatering and complexes
.
Background technology
At present, low dense gas occupies very large proportion in coal mine gas drainage, due to the methane content (5% ~ 25%) of low dense gas in the limits of explosion scope, so the conveying to low dense gas has stricter requirement, in engineering, gas feed system adopts thin water smoke to carry, a large amount of water smoke enters generating set with low dense gas, and generating set is caused damage.
Water vapour is blended in combustion gas and does not participate in burning, finally along with flue gas is discharged engine together, and 600 ℃ of left and right of funnel temperature, to there be a lot of heats to be absorbed by water vapour, additionally increase the consumption of fuel gas, reduced the efficiency of generating set, increased the power consumption of delivery system.
The water of using in the water smoke delivery system is all processed by water softening system, a large amount of water smoke is swept along by gas and is wasted, by low dense gas dehydration dehumidification system, the water smoke in gas and water vapour are removed to collect again and turn back in spraying system, reduce the consumption of the softening water of spraying system, reduced system operation cost.
General machinery dehumidifying, water rem oval is low, can only remove operative liquid water, and can not regulate the relative humidity and the temperature that enter generating set, be badly in need of a kind of corresponding device of exploitation for the characteristic of low dense gas feed system for this reason, adopt cool-down dehumidification to dehumidify and combine with machinery, reach dewater, the purpose of temperature adjustment, damping.
Summary of the invention
The objective of the invention is for low concentration gas mechanical dehydration weak effect, inefficient problem, invent a kind of cooling and machinery of adopting and remove the warm low concentration gas dewatering combined, and a kind of corresponding complexes are provided simultaneously
.
One of technical scheme of the present invention is:
A kind of low concentration gas dewatering is characterized in that it comprises the following steps:
At first, make to enter strainer from the low concentration gas in coal seam, by the water smoke in gas and particulate matter removing;
Secondly, the low concentration gas that makes to remove water smoke and particulate matter enters in pre-cooler and carries out precooling, and with carry out heat exchange through cooled low concentration gas, realize cooling for the first time;
The 3rd, make to enter in the aqueous vapor interchanger and carry out heat exchange, cool-down dehumidification with chilled water through the low concentration gas of cooling for the first time;
The 4th, the low concentration gas after reducing temperature and humidity is entered in air water separator, remove water smoke wherein;
The 5th, make the low concentration gas after again removing water smoke again enter in pre-cooler and carry out heat exchange with the low concentration gas on the heat transfer tube surface of flowing through entered from strainer by heat transfer tube, realize the cooling for the first time of the low concentration gas to newly entering; When the low concentration gas in heat transfer tube heats up, humidity descends;
Finally, the low concentration gas in the heat transfer tube after heat exchange heats up is sent in generating set and generated electricity.
Described cold coal water is provided by handpiece Water Chilling Units, cold water storage cistern and water circulating pump circulation, and the water heat transfer tube flow through for refrigerant water is installed in the aqueous vapor interchanger, and low concentration gas carries out heat exchange with the water heat transfer tube in the aqueous vapor interchanger, to realize the purpose of cooling.
Two of technical scheme of the present invention is:
A kind of low concentration gas is dehydrated into covering device, it is characterized in that it is mainly by strainer 1, pre-cooler 2, aqueous vapor interchanger 3, air water separator 4, handpiece Water Chilling Units 5, cold water storage cistern 6 and water circulating pump 7 form, low concentration gas enters pre-cooler 2 from the exit end of strainer 1 from the entrance end of strainer 1 enters demist and particle, be equipped with in pre-cooler 2 for the low concentration gas through cooling and flow through and for carrying out from the low concentration gas of strainer 1 heat transfer tube 8 of heat exchange, low concentration gas enters aqueous vapor interchanger 3 after pre-cooler 2 is once cooling, and to carry out secondary cooling, the water heat transfer tube 9 flow through for refrigerant water is installed at aqueous vapor interchanger 3, the entrance end of water heat transfer tube 9 is connected with the exit end of water circulating pump 7, the entrance end of water circulating pump 7 is connected with the exit end of cold water storage cistern 6, the entrance end of cold water storage cistern 6 is connected with the exit end of handpiece Water Chilling Units 5, the entrance end of handpiece Water Chilling Units 5 is connected with the exit end of water heat transfer tube, through with lower concentration and its heat exchange after chilled water be stored in cold water storage cistern and use from water circulating pump from the exit end of water heat transfer tube enters the handpiece Water Chilling Units refrigeration, water circulating pump is sent the cold water of storing in cold water storage cistern into the water heat transfer tube that is arranged in aqueous vapor interchanger 3 and is realized cooling to the secondary circulation of the low concentration gas through once cooling, enter in aqueous vapor interchanger 3 in moisture separator 4 and further enter in the heat transfer tube 8 be arranged in pre-cooler after removal water smoke, and flow to generating set from heat transfer tube 8.
Described strainer 1, pre-cooler 2, aqueous vapor interchanger 3 and air water separator 4 all are connected with the blowdown interface.
Beneficial effect of the present invention:
Whole system of the present invention does not need control instruments on tracheae, guarantee that low dense gas is carried safe and reliable, handpiece Water Chilling Units reaches by controlling water temperature the purpose of controlling low dense gas temperature, and handpiece Water Chilling Units is installed on outdoor, with tracheae, enough safe distances are arranged, guarantee the security of system.
The present invention can improve the dewatering efficiency of low concentration gas, can provide the gas that meets the generating quality requirements for generating set.
The application that the present invention is low concentration gas provides new purposes, is conducive to mine safety and environment protection, provides the new energy for power plant simultaneously.
The inventive method is simple, and equipment cost is low, safe and reliable to operation.
Of the present invention applied widely, be not only applicable to the coal mine mash gas of methane concentration >=5%, also applicable to the damping that dewaters of refuse embedded gas, digestion gas.
The accompanying drawing explanation
Fig. 1 is the composition schematic diagram of complexes of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
Embodiment mono-.
As Fig. 1.
A kind of low concentration gas dewatering is characterized in that it comprises the following steps:
At first, make the lower concentration coal mine mash gas of methane concentration from coal seam >=5% enter strainer 1 by pipeline, by the water smoke in the lower concentration coal mine mash gas and particulate matter removing;
Secondly, the lower concentration coal mine mash gas that makes to remove water smoke and particulate matter enters in pre-cooler 2 and carries out precooling, heat transfer tube 8 is installed in pre-cooler 2, in heat transfer tube 8, stream has cooled lower concentration coal mine mash gas, the lower concentration coal mine mash gas of sending here in lower concentration coal mine mash gas in heat transfer tube 8 and strainer 1 carries out heat exchange, realizes cooling for the first time;
The 3rd, make to enter in aqueous vapor interchanger 3 and carry out heat exchange, cool-down dehumidification with chilled water through the lower concentration coal mine mash gas of cooling for the first time; Water heat transfer tube 9 is installed in aqueous vapor interchanger 3, has flowed through in water heat transfer tube 9 through the cooled chilled water of handpiece Water Chilling Units, after lower concentration coal mine mash gas and 9 heat exchange of water heat transfer tube, realize the reducing temperature twice wet down; Described cold coal water is provided by cooling unit, ice chest and water circulating pump circulation, and the water heat transfer tube flow through for refrigerant water is installed in the aqueous vapor interchanger, and the lower concentration coal mine mash gas carries out heat exchange with the water heat transfer tube in the aqueous vapor interchanger, to realize the purpose of cooling;
The 4th, the lower concentration coal mine mash gas after the reducing temperature twice wet down is entered in air water separator 4, remove water smoke wherein;
The 5th, lower concentration coal mine mash gas after again removing water smoke is transported to the heat transfer tube 8 that is arranged in pre-cooler 2 and carries out heat exchange with the lower concentration coal mine mash gas on heat transfer tube 8 surfaces of flowing through that enter from strainer 1 by pipeline, realize the cooling for the first time of the lower concentration coal mine mash gas to newly entering; When the lower concentration coal mine mash gas in heat transfer tube 8 heats up, humidity descends;
Finally, the lower concentration coal mine mash gas in the heat transfer tube 8 after heat exchange heats up is sent in generating set and generated electricity.
The present embodiment also can be used for processing the damping that dewaters of methane concentration >=5% refuse embedded gas and digestion gas.
Embodiment bis-.
A kind of low concentration gas is dehydrated into covering device, it is mainly by strainer 1, pre-cooler 2, aqueous vapor interchanger 3, air water separator 4, handpiece Water Chilling Units 5, cold water storage cistern 6 and water circulating pump 7 form, low concentration gas enters pre-cooler 2 from the exit end of strainer 1 from the entrance end of strainer 1 enters demist and particle, be equipped with in pre-cooler 2 for the low concentration gas through cooling and flow through and for carrying out from the low concentration gas of strainer 1 heat transfer tube 8 of heat exchange, low concentration gas enters aqueous vapor interchanger 3 after pre-cooler 2 is once cooling, and to carry out secondary cooling, the water heat transfer tube 9 flow through for refrigerant water is installed at aqueous vapor interchanger 3, the entrance end of water heat transfer tube 9 is connected with the exit end of water circulating pump 7, the entrance end of water circulating pump 7 is connected with the exit end of cold water storage cistern 6, the entrance end of cold water storage cistern 6 is connected with the exit end of handpiece Water Chilling Units 5, the entrance end of handpiece Water Chilling Units 5 is connected with the exit end of water heat transfer tube, through with lower concentration and its heat exchange after chilled water be stored in cold water storage cistern and use from water circulating pump from the exit end of water heat transfer tube enters the handpiece Water Chilling Units refrigeration, water circulating pump is sent the cold water of storing in cold water storage cistern into the water heat transfer tube that is arranged in aqueous vapor interchanger 3 and is realized cooling to the secondary circulation of the low concentration gas through once cooling, enter in aqueous vapor interchanger 3 in moisture separator 4 and further enter in the heat transfer tube 8 be arranged in pre-cooler after removal water smoke, and flow to generating set from heat transfer tube 8.Described strainer 1, pre-cooler 2, aqueous vapor interchanger 3 and air water separator 4 all are connected with the blowdown interface.
In Fig. 1:
(1) unstripped gas enters one and removes water filter, and water smoke and part particulate matter are removed together, reduces the refrigeration duty of downstream refrigeration system, and the protection interchanger, extends the scavenging period of interchanger.
(2) low dense gas cooled dehydrated adopts two-stage cooling, and the one-level backheat is dewatered, damping; Low dense gas after filtration is introduced into pre-cooler and cooled low dense gas heat exchange, and low dense gas is lowered the temperature for the first time and reclaimed cold, save energy; Enter again water-gas interchanger and chilled water and carry out heat exchange, cool-down dehumidification; Cooled low dense gas enters air water separator, and the water smoke that condensation is gone out removes; Cold air enters pre-cooler and the hot gas heat exchange of coming in again, and the temperature of rising cold air reduces relative humidity in the time of intensification, and what reach generating set uses the gas quality requirements.
(3) the system low-temperature receiver is an electricity refrigeration handpiece Water Chilling Units, and chilled water system is established water pump and cold water storage cistern, is closed cycle; Pre-cooler and interchanger all adopt tube and shell heat exchanger, and heat transfer tube adopts stainless steel, prevent corrosion.
(4) device bottom that each generation water of condensation is assembled is provided with water of condensation row mouthful, and the access multilevel water seal, reclaim water of condensation.
(5) whole system does not need control instruments on tracheae, guarantee that low dense gas is carried safe and reliable, handpiece Water Chilling Units reaches by controlling water temperature the purpose of controlling low dense gas temperature, and handpiece Water Chilling Units is installed on outdoor, with tracheae, enough safe distances are arranged, guarantee the security of system.
The part that the present invention does not relate to all prior art that maybe can adopt same as the prior art is realized.
Claims (4)
1. a low concentration gas dewatering is characterized in that it comprises the following steps:
At first, make to enter strainer from the low concentration gas in coal seam, by the water smoke in gas and particulate matter removing;
Secondly, the low concentration gas that makes to remove water smoke and particulate matter enters in pre-cooler and carries out precooling, and with carry out heat exchange through cooled low concentration gas, realize cooling for the first time;
The 3rd, make to enter in the aqueous vapor interchanger and carry out heat exchange, cool-down dehumidification with chilled water through the low concentration gas of cooling for the first time;
The 4th, the low concentration gas after reducing temperature and humidity is entered in air water separator, remove water smoke wherein;
The 5th, make the low concentration gas after again removing water smoke again enter in pre-cooler and carry out heat exchange with the low concentration gas on the heat transfer tube surface of flowing through entered from strainer by heat transfer tube, realize the cooling for the first time of the low concentration gas to newly entering; When the low concentration gas in heat transfer tube heats up, humidity descends;
Finally, the low concentration gas in the heat transfer tube after heat exchange heats up is sent in generating set and generated electricity.
2. method according to claim 1, it is characterized in that described cold coal water is provided by cooling unit, ice chest and water circulating pump circulation, the water heat transfer tube flow through for refrigerant water is installed in the aqueous vapor interchanger, low concentration gas carries out heat exchange with the water heat transfer tube in the aqueous vapor interchanger, to realize the purpose of cooling.
3. a low concentration gas is dehydrated into covering device, it is characterized in that it is mainly by strainer (1), pre-cooler (2), aqueous vapor interchanger (3), air water separator (4), handpiece Water Chilling Units (5), cold water storage cistern (6) and water circulating pump (7) form, low concentration gas enters pre-cooler (2) from the exit end of strainer (1) from the entrance end of strainer (1) enters demist and particle, be equipped with in pre-cooler (2) for the low concentration gas through cooling and flow through and for carrying out from the low concentration gas of strainer (1) heat transfer tube (8) of heat exchange, low concentration gas enters aqueous vapor interchanger (3) after pre-cooler (2) is once cooling, and to carry out secondary cooling, the water heat transfer tube (9) flow through for refrigerant water is installed at aqueous vapor interchanger (3), the entrance end of water heat transfer tube (9) is connected with the exit end of water circulating pump (7), the entrance end of water circulating pump (7) is connected with the exit end of cold water storage cistern (6), the entrance end of cold water storage cistern (6) is connected with the exit end of handpiece Water Chilling Units (5), the entrance end of handpiece Water Chilling Units (5) is connected with the exit end of water heat transfer tube, through with lower concentration and its heat exchange after chilled water be stored in cold water storage cistern and use from water circulating pump from the exit end of water heat transfer tube enters the handpiece Water Chilling Units refrigeration, water circulating pump is sent the cold water of storing in cold water storage cistern into the water heat transfer tube that is arranged in aqueous vapor interchanger (3) and is realized cooling to the secondary circulation of the low concentration gas through once cooling, enter in aqueous vapor interchanger (3) in moisture separator (4) and further enter in the heat transfer tube (8) be arranged in pre-cooler after removal water smoke, and flow to generating set from heat transfer tube (8).
4. complexes according to claim 3, is characterized in that described strainer (1), pre-cooler (2), aqueous vapor interchanger (3) and air water separator (4) all are connected with the blowdown interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210577295XA CN103074135A (en) | 2012-12-27 | 2012-12-27 | Low-concentration methane gas dewatering method and complete equipment |
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| CN201210577295XA CN103074135A (en) | 2012-12-27 | 2012-12-27 | Low-concentration methane gas dewatering method and complete equipment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103527346A (en) * | 2013-09-15 | 2014-01-22 | 贵州盘江煤层气开发利用有限责任公司 | Device for improving power generation efficiency through gas generator high-temperature flue gas refrigerating |
| CN103823142A (en) * | 2014-03-06 | 2014-05-28 | 贵州盘江煤层气开发利用有限责任公司 | Low-concentration gas power generation simulation device |
| CN109609224A (en) * | 2018-12-04 | 2019-04-12 | 南京工程学院 | Water removal cooling device and its implementation for shale gas |
| CN110368765A (en) * | 2019-07-24 | 2019-10-25 | 上海环境保护有限公司 | A kind of energy-efficient exhaust gas demisting wet down technique and device |
| CN110440244A (en) * | 2019-07-23 | 2019-11-12 | 北京君发可燃气体技术开发有限公司 | A kind of low concentration gas differential burner |
| CN114717032A (en) * | 2022-04-06 | 2022-07-08 | 中煤科工集团重庆研究院有限公司 | Low-concentration coal bed gas power generation efficiency improving system and method |
| CN114774173A (en) * | 2022-04-06 | 2022-07-22 | 中煤科工集团重庆研究院有限公司 | Low-concentration gas source quality adjusting system and method |
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| CN2497857Y (en) * | 2001-09-03 | 2002-07-03 | 吕应中 | Unitary gas dewaterer |
| CN2591531Y (en) * | 2002-11-12 | 2003-12-10 | 北京众合创业科技发展有限责任公司 | Low-temperature cold accumulation circulating water machine set |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527346A (en) * | 2013-09-15 | 2014-01-22 | 贵州盘江煤层气开发利用有限责任公司 | Device for improving power generation efficiency through gas generator high-temperature flue gas refrigerating |
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| CN109609224A (en) * | 2018-12-04 | 2019-04-12 | 南京工程学院 | Water removal cooling device and its implementation for shale gas |
| CN110440244A (en) * | 2019-07-23 | 2019-11-12 | 北京君发可燃气体技术开发有限公司 | A kind of low concentration gas differential burner |
| CN110440244B (en) * | 2019-07-23 | 2024-08-27 | 北京君发科技集团有限公司 | Low-concentration gas differential combustion device |
| CN110368765A (en) * | 2019-07-24 | 2019-10-25 | 上海环境保护有限公司 | A kind of energy-efficient exhaust gas demisting wet down technique and device |
| CN114717032A (en) * | 2022-04-06 | 2022-07-08 | 中煤科工集团重庆研究院有限公司 | Low-concentration coal bed gas power generation efficiency improving system and method |
| CN114774173A (en) * | 2022-04-06 | 2022-07-22 | 中煤科工集团重庆研究院有限公司 | Low-concentration gas source quality adjusting system and method |
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Application publication date: 20130501 |