CN205480969U - Gaseous oxidation unit's of leading ultra -low concentration methane gas exhaust -heat boiler - Google Patents
Gaseous oxidation unit's of leading ultra -low concentration methane gas exhaust -heat boiler Download PDFInfo
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- CN205480969U CN205480969U CN201620192352.6U CN201620192352U CN205480969U CN 205480969 U CN205480969 U CN 205480969U CN 201620192352 U CN201620192352 U CN 201620192352U CN 205480969 U CN205480969 U CN 205480969U
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- methane
- methane gas
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Abstract
The utility model discloses a gaseous oxidation unit's of leading ultra -low concentration methane gas exhaust -heat boiler, including the boiler flue and rather than the chimney that communicates, the front end intercommunication of boiler flue has the methane oxidation device, be equipped with leading evaporimeter, over heater, high temperature gas gas preheater, evaporimeter, economizer and low temperature gas gas preheater by the front end in proper order to the rear end in the boiler flue, low temperature gas gas preheater closes on the chimney, low temperature gas gas preheater's exit end is equipped with the gaseous flue of low temperature gas with high temperature gas gas preheater's entry end, and high temperature gas gas preheater's exit end is equipped with the gaseous flue of high temperature gas with the entry end of methane oxidation device, it mends right combustor to be equipped with in the gaseous flue of high temperature gas. Has following advantage: realize the gaseous high -efficient low -cost oxidation of ultra -low concentration methane gas to retrieve the profit with methane oxidation device waste heat.
Description
Technical field
This utility model belongs to environmental protection and energy saving technical field, the waste heat boiler of a kind of preposition super low concentration methane methane gas oxidation unit.
Background technology
Coal is the fuel that China's consumption is maximum, and methane gas is the mixture of a kind of fuel gas of association in coal mining, mainly air and CH4.For ensureing production safety, need to be passed through large quantity of air to dilute mine air before coal mining so that it is the methane concentration in colliery reduces, and enters air the most again.This methane gas being pumped in air, methane content is generally below 1%.For a long time, owing in this coalmine ventilation methane gas, methane concentration is low, it is difficult, large-minded to be enriched with, utilize technical difficulty relatively big, be therefore typically all directly discharged to air, be seldom recycled.The CH4 that China enters air by coalmine ventilation gas every year is 130～170 billion cubic meters.CH4, as being only second to the greenhouse gases of CO2, causes huge harm to environment.If this super low concentration methane methane gas can be carried out oxidation processes; it is converted into water and carbon dioxide; eliminating or reduce the discharge of dusty gas, recycle the waste heat of oxidation unit simultaneously, this has direct and important meaning to environmental conservation and utilization of energy.
Utility model content
Technical problem to be solved in the utility model is to provide the waste heat boiler of a kind of preposition super low concentration methane methane gas oxidation unit, it is achieved the oxidation of super low concentration methane methane gas high efficiency, low cost, and carries out methane oxidation device waste heat reclaiming profit.
For solving above-mentioned technical problem, the waste heat boiler of the preposition super low concentration methane methane gas oxidation unit that this utility model provides, it includes boiler flue and the chimney communicated therewith, the front end of described boiler flue is communicated with methane oxidation device, being sequentially provided with front-packed evaporator, superheater, high temperature methane gas preheater, vaporizer, economizer and low temperature methane gas preheater by front end to rear end in described boiler flue, described low temperature methane gas preheater closes on chimney；The port of export of low temperature methane gas preheater is provided with low temperature methane gas flue with the arrival end of high temperature methane gas preheater, and the port of export of high temperature methane gas preheater and the arrival end of methane oxidation device are provided with high temperature methane gas flue；The right burner of benefit it is provided with in described high temperature methane gas flue.Super low concentration methane methane gas close to room temperature is preheated to about 500 DEG C through high and low temperature methane gas preheater successively, then afterburning burner is utilized to be further heated to about 850 DEG C, and methane oxidation device is set before waste heat boiler heating surface, meet time and the space requirement of methane oxidation.
As preferably, described methane oxidation device is provided with bend.On the one hand improve the methane methane gas time of staying at high operating temperatures, on the other hand increase super low concentration methane methane gas turbulivity in methane oxidation device, thus methane reaction can be allowed fully to carry out.
As preferably, the pipeline section of described methane oxidation device is long-pending more than high temperature methane gas flue sectional area.The methane in super low concentration methane methane gas is made fully to react.
As preferably, described high temperature methane gas flue is provided with high temperature heat source entrance.As there is other high temperature heat source at scene, it is possible to be introduced in high temperature methane gas flue.
After using above structure, the waste heat boiler of preposition super low concentration methane methane gas oxidation unit of the present utility model compared with prior art, has the advantage that
1, system is simple, and cost puts into low, it is not necessary to build the complicated fire coal of tradition or gas fired-boiler；
2, system arranges flexibly, and other high temperature heat source of available colliery scene aoxidizes；
3, systematic running cost is low.Owing to this boiler is with oxidation super low concentration methane for main oxidation object, and make full use of oxidation unit waste heat, super low concentration methane oxidation institute calorific requirement is preferably minimized.As used tradition pulverized-coal fired boiler, oxidation 1Nm3 super low concentration methane methane gas about needs additional 4MJ heat；And the present invention, oxidation 1Nm3 super low concentration methane methane gas only needs additional about 0.5MJ heat, more much lower than coal-powder boiler.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
Wherein: 1, methane oxidation device, 2, front-packed evaporator, 3, superheater, 4, high temperature methane gas preheater,
5, vaporizer, 6, economizer, 7, low temperature methane gas preheater, 8, chimney, 9, boiler flue, 10, high temperature methane gas flue, 11, low temperature methane gas flue, 12, afterburning burner, 13, bend, 14, high temperature heat source entrance.
Detailed description of the invention
The utility model will be further described to combine accompanying drawing below by embodiment.
As shown in Figure 1, the waste heat boiler of the preposition super low concentration methane methane gas oxidation unit that the present embodiment provides, it includes boiler flue 9 and the chimney 8 communicated therewith, the front end of described boiler flue 9 is communicated with methane oxidation device 1, described methane oxidation device 1 is provided with bend 13, being sequentially provided with front-packed evaporator 2, superheater 3, high temperature methane gas preheater 4, vaporizer 5, economizer 6 and low temperature methane gas preheater 7 by front end to rear end in described boiler flue 9, described low temperature methane gas preheater 7 closes on chimney 8；The port of export of low temperature methane gas preheater 7 is provided with low temperature methane gas flue 11 with the arrival end of high temperature methane gas preheater 4, and the port of export of high temperature methane gas preheater 7 and the arrival end of methane oxidation device 1 are provided with high temperature methane gas flue 10；The right burner 12 of benefit it is provided with in described high temperature methane gas flue 10.
The pipeline section of described methane oxidation device 1 is long-pending more than high temperature methane gas flue 10 sectional area, and described high temperature methane gas flue 10 is provided with high temperature heat source entrance 14.
Arrange waste heat boiler after methane oxidation device 1, be used for recycling high-temperature flue gas heat.A high-temperature flue gas part is for being heated into superheated steam by the water of boiler certain pressure, and another part is for being preheated to about 500 DEG C by super low concentration methane methane gas.
Temperature is first passed through low temperature methane gas preheater 7 close to the super low concentration methane methane gas of room temperature and preheats, and low temperature methane gas preheater 7 is arranged in afterbody can reduce the exhaust gas temperature of waste heat boiler as far as possible.The super low concentration methane methane gas of low temperature methane gas preheater 7 outlet enters high temperature methane gas preheater 4 through low temperature methane gas flue 11 and is heated to about 500 DEG C.For the temperature of super low concentration methane methane gas is further increased to about 850 DEG C, afterburning burner need to be arranged in high temperature methane gas flue 10, as there is other high temperature heat source at scene, it is possible to be introduced into heating super low concentration methane methane gas.Super low concentration methane methane gas after heating enters preposition methane oxidation device 1 and carries out oxidation reaction, generates water and carbon dioxide.For making the methane in super low concentration methane methane gas fully to react, methane oxidation device 1 can improve gas flow area, both the pipeline section of methane oxidation device 1 was long-pending more than high temperature methane gas flue 10 sectional area, also the flue of methane oxidation device 1 can be arranged to bend shape simultaneously, on the one hand improve the super low concentration methane methane gas time of staying at high operating temperatures, the opposing party increases super low concentration methane methane gas turbulivity in methane oxidation device 1, thus methane reaction can be allowed fully to carry out.
Super low concentration methane methane gas high-temperature gas after methane oxidation device 1 aoxidizes enters waste heat boiler and carries out heat recovery and utilization.For protection boiler heating surface; one section of front-packed evaporator 2 arranged by waste heat boiler; high-temperature flue gas is reduced to suitable temperature; then sequentially enter superheater 3, high temperature methane gas preheater 4, vaporizer 5, economizer 6, low temperature methane gas preheater 7 carry out heat exchange; after last cigarette temperature drop is low, enter air by chimney 8.The concrete structure pattern of each waste heat boiler heating surface is identical with conventional waste heat boiler.
Claims (4)
1. the waste heat boiler of a preposition super low concentration methane methane gas oxidation unit, it is characterized in that: it includes boiler flue and the chimney communicated therewith, the front end of described boiler flue is communicated with methane oxidation device, being sequentially provided with front-packed evaporator, superheater, high temperature methane gas preheater, vaporizer, economizer and low temperature methane gas preheater by front end to rear end in described boiler flue, described low temperature methane gas preheater closes on chimney；The port of export of low temperature methane gas preheater is provided with low temperature methane gas flue with the arrival end of high temperature methane gas preheater, and the port of export of high temperature methane gas preheater and the arrival end of methane oxidation device are provided with high temperature methane gas flue；The right burner of benefit it is provided with in described high temperature methane gas flue.
The waste heat boiler of preposition super low concentration methane methane gas oxidation unit the most according to claim 1, it is characterised in that: described methane oxidation device is provided with bend.
The waste heat boiler of preposition super low concentration methane methane gas oxidation unit the most according to claim 1, it is characterised in that: the pipeline section of described methane oxidation device is long-pending more than high temperature methane gas flue sectional area.
The waste heat boiler of preposition super low concentration methane methane gas oxidation unit the most according to claim 1, it is characterised in that: described high temperature methane gas flue is provided with high temperature heat source entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620192352.6U CN205480969U (en) | 2016-03-14 | 2016-03-14 | Gaseous oxidation unit's of leading ultra -low concentration methane gas exhaust -heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620192352.6U CN205480969U (en) | 2016-03-14 | 2016-03-14 | Gaseous oxidation unit's of leading ultra -low concentration methane gas exhaust -heat boiler |
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| Publication Number | Publication Date |
|---|---|
| CN205480969U true CN205480969U (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620192352.6U Withdrawn - After Issue CN205480969U (en) | 2016-03-14 | 2016-03-14 | Gaseous oxidation unit's of leading ultra -low concentration methane gas exhaust -heat boiler |
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| Country | Link |
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| CN (1) | CN205480969U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588123A (en) * | 2016-03-14 | 2016-05-18 | 杭州锅炉集团股份有限公司 | Waste heat boiler of preposition ultra-low concentration methane gas oxidation device |
-
2016
- 2016-03-14 CN CN201620192352.6U patent/CN205480969U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588123A (en) * | 2016-03-14 | 2016-05-18 | 杭州锅炉集团股份有限公司 | Waste heat boiler of preposition ultra-low concentration methane gas oxidation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160817 Effective date of abandoning: 20171027 |
|
| AV01 | Patent right actively abandoned |