CN104728825A - Low temperature exhaust heat utilization system and method - Google Patents
Low temperature exhaust heat utilization system and method Download PDFInfo
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- CN104728825A CN104728825A CN201310696515.5A CN201310696515A CN104728825A CN 104728825 A CN104728825 A CN 104728825A CN 201310696515 A CN201310696515 A CN 201310696515A CN 104728825 A CN104728825 A CN 104728825A
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Abstract
Provided is a low temperature exhaust heat utilization system and method. The low temperature exhaust heat utilization system is composed of a feed pump, a conversion economizer and a boiler drum and is characterized by further comprising a heat pipe economizer, wherein the heat pipe economizer is connected between the conversion economizer and the boiler drum. Therefore, the low temperature exhaust heat utilization system is ingenious in design and reasonable in layout. The temperature of feed water entering the boiler drum is increased through the secondary preheating for further improving the overall system waste heat utilization rate, reducing energy consumption and improving efficiency. The low temperature exhaust heat utilization system and method is especially suitable for recovery of a waste heat system.
Description
Technical field
The invention belongs to technical field of waste heat utilization, be specifically related to a kind of low temperature heat system and method thereof.
Background technology
In China, gas washing in SA production comprises acid production with sulphur, pyrite-based sulfuric acid production, metallurgical off-gas acid-making, and said method adopts advanced double-absorption technique mostly, releases large calorimetric when acid manufacturing processes particularly generates SO2, produce the high-temperature residual heat of 800-1000 DEG C in roasting process, account for 60% of total waste heat amount, the middle temperature waste heat of about 500 DEG C is produced in conversion process, account for 15%, wherein high temperature section waste heat flue-gas temperature after waste heat boiler reclaims is down to about 350 DEG C, clean-up stage entrance flue gas temperature still has the low temperature exhaust heat of about 320 DEG C, account for about 15%, present boiler-steam dome waterworks, generally all adopt the mode utilizing the preheating of transform portion waste heat one-level, its shortcoming is that boiler-steam dome feed temperature only has about 176 DEG C, the medium temperature and medium pressure that system is produced that is 450 DEG C, the quantity of steam of 3.82MPa is restricted, thus decrease the systems generate electricity amount reduction performance of enterprises, clean-up stage low temperature exhaust heat can not get effective utilization, the higher exhaust gas volumn of clean-up stage entrance flue gas temperature is larger, most gas washing in SA production producer does not reclaim this part of waste heat, but adopt cooling wash mill to cool, need a large amount of cooling circulating waters, not only waste resource, and add purification section and recirculated water process parameter control and run difficulty.
Summary of the invention
The object of this invention is to provide a kind of energy-saving and cost-reducing system and the method thereof that utilize purification portion subsystem low temperature heat in gas washing in SA production.
The present invention is achieved like this: a kind of low temperature heat system is made up of feed pump, conversion economizer, boiler-steam dome, it is characterized in that it also comprises heat pipe economizer; Described heat pipe economizer is connected to and transforms between economizer and boiler-steam dome.
Heat pipe economizer of the present invention is connected with conversion economizer and boiler-steam dome with heat pipe economizer delivery port respectively by heat pipe economizer water inlet.
There is heat pipe economizer air inlet heat pipe economizer lower end of the present invention, and there is heat pipe economizer gas outlet its upper end.
By a kind of low temperature heat system of the present invention and method thereof, it is characterized in that comprising the following steps: the boiler-steam dome of 90-110 DEG C feedwater is extremely transformed economizer water inlet by Pipeline transport by feed pump, boiler-steam dome feed temperature is in conversion economizer, by with transform that economizer air inlet enters from conversion section converter III in acid-making process swap out mouth flue gas heat exchange after, be increased to 160-180 DEG C, connected by pipeline again and be delivered to heat pipe economizer water inlet, boiler-steam dome feed temperature is in heat pipe economizer, by with heat pipe economizer air inlet enter from after the cottrell exiting flue gas heat exchange of acid-making process gross decontamination operation, be increased to 190-210 DEG C, connected by pipeline again and be delivered to boiler-steam dome.
The present invention compared with prior art has following advantage:
The present invention utilizes the low temperature exhaust heat of flue gas in cleaning procedure in acid-making process, carries out secondary preheating, both recycled the low temperature exhaust heat of purification section to boiler-steam dome feedwater, turn improve boiler-steam dome feed temperature, thus increase quantity of steam about 1.9t, improve generating efficiency, improve effects.
Accompanying drawing explanation
Fig. 1: be the schematic diagram of the embodiment of the present invention.
In figure: 1 transforms economizer air inlet, 2 feed pumps, 3 transform economizer water inlet, and 4 transform economizer, 5 transform economizer gas outlet, 6 transform economizer delivery port, 7 heat pipe economizer water inlets, 8 heat exchange of heat pipe gas outlets, 9 heat exchange of heat pipes, 10 heat exchange of heat pipe delivery ports, 11 heat exchange of heat pipe air inlets
12 boiler-steam domes.
Detailed description of the invention
As shown in the figure: feed pump 2 is connected to by pipeline and transforms economizer water inlet 3, transform economizer 4 upper and lower side be provided with conversion economizer gas outlet 5 and transform economizer air inlet 1; Boiler-steam dome 12 feeds water by transforming economizer delivery port 6 by pipeline series winding to heat pipe economizer water inlet 7, and heat exchange of heat pipe 9 upper and lower side is provided with heat exchange of heat pipe gas outlet 8 and heat exchange of heat pipe air inlet 11; Boiler-steam dome 12 feeds water and is connected to boiler-steam dome 12 by heat pipe economizer delivery port 10 by pipeline.
The method of UTILIZATION OF VESIDUAL HEAT IN, the boiler-steam dome of 90-110 DEG C feedwater is extremely transformed economizer water inlet by Pipeline transport by feed pump, boiler-steam dome feed temperature is in conversion economizer, by with transform that economizer air inlet enters from conversion section converter III in acid-making process swap out mouth flue gas heat exchange after, be increased to 160-180 DEG C, connected by pipeline again and be delivered to heat pipe economizer water inlet, boiler-steam dome feed temperature is in heat pipe economizer, by with heat pipe economizer air inlet enter from after the cottrell exiting flue gas heat exchange of acid-making process gross decontamination operation, be increased to 190-210 DEG C, connected by pipeline again and be delivered to boiler-steam dome.
During use, boiler-steam dome 12 from power plant's oxygen-eliminating device is fed water to be connected to by pipeline by feed pump 2 and transforms economizer water inlet 3, boiler-steam dome 12 feed water transform in economizer 4 be connected to by pipeline and transform flue gas heat exchange that in economizer air inlet 1 to acid-making process, conversion section converter III exports after, flue gas one inhales tower entrance by what transform that economizer gas outlet 5 is connected to conversion section in acid-making process by pipeline, boiler-steam dome 12 feeds water by transforming economizer delivery port 6 by pipeline series winding to heat pipe economizer water inlet 7, again be connected to the electricity of cleaning procedure in heat exchange of heat pipe air inlet 11 to acid-making process by pipeline and gather dust after the flue gas heat exchange that exports, flue gas is connected to cleaning procedure dynamic wave scrubbing tower entrance in acid-making process by heat exchange of heat pipe gas outlet 8 by pipeline, boiler-steam dome 12 feeds water and is connected to boiler-steam dome by pipeline.
The present invention is not limited to above embodiment, the device of other the prior art that low-temperature residual heat utilization device also can adopt those skilled in the art to expect.
Claims (4)
1. a low temperature heat system, is made up of feed pump (2), conversion economizer (4), boiler-steam dome (12), it is characterized in that it also comprises heat pipe economizer (9); Described heat pipe economizer is connected to and transforms between economizer and boiler-steam dome.
2., according to the low temperature heat system described in claim 1, it is characterized in that described heat pipe economizer (9) is connected with conversion economizer (4) and boiler-steam dome (12) with heat pipe economizer delivery port (10) respectively by heat pipe economizer water inlet (7).
3. low temperature heat system according to claim 1 and 2, is characterized in that: there is heat pipe economizer air inlet (11) described heat pipe economizer (9) lower end, and there is heat pipe economizer gas outlet (8) its upper end.
4. one kind by low temperature heat method according to claim 1, it is characterized in that it comprises the following steps: the boiler-steam dome (12) of 90-110 DEG C feedwater is extremely transformed economizer water inlet (3) by Pipeline transport by feed pump (2), boiler-steam dome (12) feed temperature is in conversion economizer (4), by with transform economizer air inlet (1) enter from conversion section converter III in acid-making process swap out mouth flue gas heat exchange after, be increased to 160-180 DEG C, connected by pipeline again and be delivered to heat pipe economizer water inlet (7), boiler-steam dome (12) feed temperature is in heat pipe economizer (9), by with heat pipe economizer air inlet (11) enter from after the cottrell exiting flue gas heat exchange of acid-making process gross decontamination operation, be increased to 190-210 DEG C, connected by pipeline again and be delivered to boiler-steam dome (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310696515.5A CN104728825A (en) | 2013-12-18 | 2013-12-18 | Low temperature exhaust heat utilization system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310696515.5A CN104728825A (en) | 2013-12-18 | 2013-12-18 | Low temperature exhaust heat utilization system and method |
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| CN104728825A true CN104728825A (en) | 2015-06-24 |
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| CN201310696515.5A Pending CN104728825A (en) | 2013-12-18 | 2013-12-18 | Low temperature exhaust heat utilization system and method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0727304A (en) * | 1993-07-08 | 1995-01-27 | Takuma Co Ltd | Boiler water feeding system |
| CN2780737Y (en) * | 2005-04-28 | 2006-05-17 | 南京圣诺热管有限公司 | Heat pipe coal-saving device for waste heat recovery of sulfuric acid production |
| CN201407645Y (en) * | 2009-05-12 | 2010-02-17 | 南京加诺能源设备有限公司 | Radial heat pipe economizer |
| CN101706095A (en) * | 2009-09-02 | 2010-05-12 | 陈祥明 | Method for recovering acid making waste heat |
| CN202082900U (en) * | 2011-03-29 | 2011-12-21 | 中江能源回收(上海)有限公司 | Recovery system of high temperature waste heat in automatically controlled sulphur-burnt sulphuric acid |
| CN202400845U (en) * | 2011-12-08 | 2012-08-29 | 湖北祥云(集团)化工股份有限公司 | Novel sulfuric acid device |
| CN202945061U (en) * | 2012-12-06 | 2013-05-22 | 襄阳泽东化工集团有限公司 | Intermediate and low temperature heat energy recycling system used in pyrite acid making process |
| CN203187405U (en) * | 2013-04-11 | 2013-09-11 | 襄阳泽东化工集团有限公司 | Medium/low-grade heat energy recovery system in production of acid from pyrite |
-
2013
- 2013-12-18 CN CN201310696515.5A patent/CN104728825A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0727304A (en) * | 1993-07-08 | 1995-01-27 | Takuma Co Ltd | Boiler water feeding system |
| CN2780737Y (en) * | 2005-04-28 | 2006-05-17 | 南京圣诺热管有限公司 | Heat pipe coal-saving device for waste heat recovery of sulfuric acid production |
| CN201407645Y (en) * | 2009-05-12 | 2010-02-17 | 南京加诺能源设备有限公司 | Radial heat pipe economizer |
| CN101706095A (en) * | 2009-09-02 | 2010-05-12 | 陈祥明 | Method for recovering acid making waste heat |
| CN202082900U (en) * | 2011-03-29 | 2011-12-21 | 中江能源回收(上海)有限公司 | Recovery system of high temperature waste heat in automatically controlled sulphur-burnt sulphuric acid |
| CN202400845U (en) * | 2011-12-08 | 2012-08-29 | 湖北祥云(集团)化工股份有限公司 | Novel sulfuric acid device |
| CN202945061U (en) * | 2012-12-06 | 2013-05-22 | 襄阳泽东化工集团有限公司 | Intermediate and low temperature heat energy recycling system used in pyrite acid making process |
| CN203187405U (en) * | 2013-04-11 | 2013-09-11 | 襄阳泽东化工集团有限公司 | Medium/low-grade heat energy recovery system in production of acid from pyrite |
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Inventor after: Sun Xiduan Inventor after: Wang Lixin Inventor after: Zhao Jun Inventor after: Wei Jin Inventor after: Luan Dongwu Inventor after: Ji Ping Inventor after: Li Junhao Inventor before: Wang Lixin Inventor before: Zhao Jun Inventor before: Wei Jin Inventor before: Luan Dongwu Inventor before: Ji Ping Inventor before: Li Junhao |
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Application publication date: 20150624 |