CN104307193A - Immersed evaporation method - Google Patents
Immersed evaporation method Download PDFInfo
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- CN104307193A CN104307193A CN201410629158.5A CN201410629158A CN104307193A CN 104307193 A CN104307193 A CN 104307193A CN 201410629158 A CN201410629158 A CN 201410629158A CN 104307193 A CN104307193 A CN 104307193A
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Abstract
The invention discloses an immersed evaporation method. An immersed evaporation combustor is used, and the combustor consists of a circulating plate and a barrel. Specifically, landfill gas and combustion air enter a landfill gas combustion chamber for combustion, high temperature fuel gas is torn by a gas distribution weir at the bottom of the combustion chamber and then flows through a porous gas distribution board, hot gas is supplied to gas before torn by virtue of a plurality of separated gas outlets, the hot gas and the gas before torn are mixed, high temperature gas is broken up into numerous small bubbles, the heat transfer area is greatly increased, and evaporation gas is subjected to gas-liquid separation in a steam separation space and then is discharged by a steam pipe; the porous gas distribution board is composed of at least three radial vertical boards. Therefore, the immersed evaporation method has obvious social benefit and economic benefit.
Description
Technical field
The present invention relates to a kind of submergence method of evaporating.
Background technology
Current, the Environmental capacity of landfill yard is still weak link, and the rubbish of wherein dissolving derives again percolate and the landfill gas pollutant of high pollution, and particularly Landfill Leachate Pollution substrate concentration is high, output is large.The process of high concentrated organic wastewater be all the time environmental worker faced by a difficult problem, be very with percolate from garbage filling field especially.Landfill stabilization is an important step of solid waste management, and for a complete solid waste management system, landfill is absolutely necessary a key element.Rubbish can produce a large amount of landfill gas after landfill.Research in recent years shows, landfill yard is the third-largest methane gas occurring source being only second to wetland and rice field, and the greenhouse effects of Board Lot methane are than CO the last 2 21 times.CH 4 is a kind of resources, can be recycled, and if effectively do not controlled and utilizing, also there is the potential safety hazard of burning, blast.Also containing the gas be harmful to very much human body on a small quantity in landfill gas, as H 2S etc.
United States Patent (USP) 4278494 describes a kind of submerged evaporator, wherein there is the large pipeline that is used for supplying hot gas.This causes the vibration of evaporimeter and the splashing of liquid, and due to this reason, evaporimeter is equipped with the connector of horizontal firing room and band bellows.Since it is known the penetrability of gas jet increases along with speed and increases, because gas can not be supplied to very high speed, therefore along with the amount of gas increases, the size of the bubble of generation also increases.When the speed of gas is relatively low, it is not absorbed in liquid that it is fed into wherein well, and this is the reason that buoyancy causes strong expansion effect in gas.
If dealt with improperly, then form serious secondary pollution, the water environment of locality and atmospheric environment are constituted a threat to, and then threaten human health and life security.Therefore, strengthen the control of landfill gas and recycling work, offset except environmental pollution and potential safety hazard, the resource degree improving garbage loading embeading process, equal tool is of great significance.With regard to current technique, percolate does not reach rational cooperation with the process of landfill gas, and processing cost is still higher.
Leachate quality excursion is very large, not only annual more folded with the four seasons, the change alternately presenting regularity in dry season, rainy season, and also show regular change with landfill yard service time, maturity, and existing garbage leachate treatment process all also exists complex process, the holdup time is long, processing cost is high, process after water quality still have end item to be difficult to the problems such as up to standard, can to surface water and Groundwater formation pollution threat.
According in the scheme of Deutsche Bundespatent 3447337, submerged evaporator is operated by suction, thus, for discharge tube, only can use very little immersion depth.Use the pipe of the separation of installing obliquely in the device.Its shortcoming is, owing to moving away from guard system during safeguarding, therefore lid must be provided with the opening of correspondingly-sized.
Directly immersing in evaporation, allowing to pass liquid bubbling from the hot gas of dip tube discharge.By this way, material and heat can be produced from gas to by the efficient transmission the liquid that evaporates.Owing to not needing heat exchanger, therefore problem of materials is not problem.For this reason, directly immerse evaporimeter and be used in particular for chemistry and metallurgical technology, in chemistry and metallurgical technology, etching condition causes the problem relevant with material.Typically, such problem appears in the heating of strongly acidic solution (such as solution of metal sulfates), evaporation and crystallization.
In submerged evaporator, dip tube is assemblied in vertical position usually to minimize the amount of the building material directly contacted with the liquid that will be processed.
United States Patent (USP) 2867972 describes a kind of submerged evaporator, and this submerged evaporator makes every effort to minimized vibrations by making gas exhaust conduit engrail with saw-toothed profile.
According in the scheme of Finnish patent 85337, gas is fed into by multiple quite little VERTICAL TUBE will by the liquid that evaporates.Advantage is, can with relatively high speed supply gas, but penetrability still remains little, because jet size is little.In fact, even now, weakening of fluctuation is also insufficient generally.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention is achieved through the following technical solutions,
A kind of submergence method of evaporating, employ submergence evaporation burner, burner is made up of circulation plates and cylindrical shell, be specially: landfill gas and combustion air enter landfill gas combustion chambers burn, high-temperature fuel gas is torn by the distribution of gas weir of so burning bottom room, again through porous air distribution plate, hot gas is supplied to the gas before being torn by the gas vent of multiple separation, and mix, high-temperature gas is split into numerous minute bubbles, significantly increase heat transfer area, boil-off gas carries out gas-liquid separation at steam separated space, is then drained by steam pipe; Porous air distribution plate is made up of at least three radial vertical plates, and the quantity of vertical plate is at least 3.
Be preferably 4-8.
The submergence on distribution of gas weir of the present invention is 0.6-0.8m.
Porous air distribution plate of the present invention to be positioned under liquid level at least 0.2m.
Integral type evaporator with submerged combustion of the present invention is manufactured by stainless steel.
A modification of the present invention is: described porous air distribution plate is at least 2, and each porous air distribution plate be arranged in parallel at vaporization chamber liquid intermediate reach, and the porous air distribution plate of the superiors to be positioned under liquid level at least 0.2m.
Beneficial effect of the present invention:
1, be the shortcoming reducing to have occurred in submerged evaporator according to the object of submerged evaporator structure of the present invention, the fluctuation in such as surface level, this fluctuation brings the vibration causing the splashing of corrosion and cause the whole evaporimeter further fluctuated.
2, the present invention's energy evaporation and concentration percolate of utilizing landfill gas to burn, achieves the integrated treatment of percolate from garbage filling field and landfill gas.
3, this integral type evaporator with submerged combustion needs space very little, can outdoor mounted, and human input is few, easy to operate, reliable.In the integrated treatment of percolate and landfill gas, if adopt submerged combustion technique burning and burying gas to carry out evaporation and concentration percolate, equipment investment and operating cost will be reduced widely, more suitable for middle-size and small-size landfill yard.
Detailed description of the invention
Embodiment 1
A kind of submergence method of evaporating, it is characterized in that: employ submergence evaporation burner, burner is made up of circulation plates and cylindrical shell, be specially: landfill gas and combustion air enter landfill gas combustion chambers burn, high-temperature fuel gas is torn by the distribution of gas weir of so burning bottom room, again through porous air distribution plate, hot gas is supplied to the gas before being torn by the gas vent of multiple separation, and mix, high-temperature gas is split into numerous minute bubbles, significantly increase heat transfer area, boil-off gas carries out gas-liquid separation at steam separated space, is then drained by steam pipe; Porous air distribution plate is made up of at least three radial vertical plates, and the quantity of vertical plate is 3.
Embodiment 2
A kind of submergence method of evaporating, it is characterized in that: employ submergence evaporation burner, burner is made up of circulation plates and cylindrical shell, be specially: landfill gas and combustion air enter landfill gas combustion chambers burn, high-temperature fuel gas is torn by the distribution of gas weir of so burning bottom room, again through porous air distribution plate, hot gas is supplied to the gas before being torn by the gas vent of multiple separation, and mix, high-temperature gas is split into numerous minute bubbles, significantly increase heat transfer area, boil-off gas carries out gas-liquid separation at steam separated space, is then drained by steam pipe; Porous air distribution plate is made up of at least three radial vertical plates, and the quantity of vertical plate is 4.
Embodiment 3
A kind of submergence method of evaporating, it is characterized in that: employ submergence evaporation burner, burner is made up of circulation plates and cylindrical shell, be specially: landfill gas and combustion air enter landfill gas combustion chambers burn, high-temperature fuel gas is torn by the distribution of gas weir of so burning bottom room, again through porous air distribution plate, hot gas is supplied to the gas before being torn by the gas vent of multiple separation, and mix, high-temperature gas is split into numerous minute bubbles, significantly increase heat transfer area, boil-off gas carries out gas-liquid separation at steam separated space, is then drained by steam pipe; Porous air distribution plate is made up of at least three radial vertical plates, and the quantity of vertical plate is 5.
Embodiment 4
A kind of submergence method of evaporating, it is characterized in that: employ submergence evaporation burner, burner is made up of circulation plates and cylindrical shell, be specially: landfill gas and combustion air enter landfill gas combustion chambers burn, high-temperature fuel gas is torn by the distribution of gas weir of so burning bottom room, again through porous air distribution plate, hot gas is supplied to the gas before being torn by the gas vent of multiple separation, and mix, high-temperature gas is split into numerous minute bubbles, significantly increase heat transfer area, boil-off gas carries out gas-liquid separation at steam separated space, is then drained by steam pipe; Porous air distribution plate is made up of at least three radial vertical plates, and the quantity of vertical plate is 6.
Embodiment 5
A kind of submergence method of evaporating, it is characterized in that: employ submergence evaporation burner, burner is made up of circulation plates and cylindrical shell, be specially: landfill gas and combustion air enter landfill gas combustion chambers burn, high-temperature fuel gas is torn by the distribution of gas weir of so burning bottom room, again through porous air distribution plate, hot gas is supplied to the gas before being torn by the gas vent of multiple separation, and mix, high-temperature gas is split into numerous minute bubbles, significantly increase heat transfer area, boil-off gas carries out gas-liquid separation at steam separated space, is then drained by steam pipe; Porous air distribution plate is made up of at least three radial vertical plates, and the quantity of vertical plate is 7.
Embodiment 6
A kind of submergence method of evaporating, it is characterized in that: employ submergence evaporation burner, burner is made up of circulation plates and cylindrical shell, be specially: landfill gas and combustion air enter landfill gas combustion chambers burn, high-temperature fuel gas is torn by the distribution of gas weir of so burning bottom room, again through porous air distribution plate, hot gas is supplied to the gas before being torn by the gas vent of multiple separation, and mix, high-temperature gas is split into numerous minute bubbles, significantly increase heat transfer area, boil-off gas carries out gas-liquid separation at steam separated space, is then drained by steam pipe; Porous air distribution plate is made up of at least three radial vertical plates, and the quantity of vertical plate is 8.
Claims (1)
1. a submergence method of evaporating, it is characterized in that: employ submergence evaporation burner, burner is made up of circulation plates and cylindrical shell, be specially: landfill gas and combustion air enter landfill gas combustion chambers burn, high-temperature fuel gas is torn by the distribution of gas weir of so burning bottom room, again through porous air distribution plate, hot gas is supplied to the gas before being torn by the gas vent of multiple separation, and mix, high-temperature gas is split into numerous minute bubbles, significantly increase heat transfer area, boil-off gas carries out gas-liquid separation at steam separated space, is then drained by steam pipe; Porous air distribution plate is made up of at least three radial vertical plates, and the quantity of vertical plate is at least 3, is preferably 4-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410629158.5A CN104307193A (en) | 2014-11-10 | 2014-11-10 | Immersed evaporation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410629158.5A CN104307193A (en) | 2014-11-10 | 2014-11-10 | Immersed evaporation method |
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| Publication Number | Publication Date |
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| CN104307193A true CN104307193A (en) | 2015-01-28 |
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| CN201410629158.5A Pending CN104307193A (en) | 2014-11-10 | 2014-11-10 | Immersed evaporation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941836A (en) * | 2022-06-07 | 2022-08-26 | 中国恩菲工程技术有限公司 | Steam generator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4278494A (en) * | 1979-04-02 | 1981-07-14 | Outokumpu Oy | Immersion evaporator |
| DE3447337A1 (en) * | 1984-12-24 | 1986-07-03 | Nukem Gmbh | METHOD FOR CHEMICAL-THERMAL DECOMPOSITION OF HIGHER HALOGENATED HYDROCARBONS |
| WO2009153403A1 (en) * | 2008-06-19 | 2009-12-23 | Outotec Oyj | Submerged evaporator |
| CN103303987A (en) * | 2013-05-16 | 2013-09-18 | 陈和平 | Method for treating landfill gas by utilizing burner |
-
2014
- 2014-11-10 CN CN201410629158.5A patent/CN104307193A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4278494A (en) * | 1979-04-02 | 1981-07-14 | Outokumpu Oy | Immersion evaporator |
| DE3447337A1 (en) * | 1984-12-24 | 1986-07-03 | Nukem Gmbh | METHOD FOR CHEMICAL-THERMAL DECOMPOSITION OF HIGHER HALOGENATED HYDROCARBONS |
| WO2009153403A1 (en) * | 2008-06-19 | 2009-12-23 | Outotec Oyj | Submerged evaporator |
| CN103303987A (en) * | 2013-05-16 | 2013-09-18 | 陈和平 | Method for treating landfill gas by utilizing burner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941836A (en) * | 2022-06-07 | 2022-08-26 | 中国恩菲工程技术有限公司 | Steam generator |
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Application publication date: 20150128 |