CN106477530B - A kind of concentrated sulfuric acid preparation facilities based on low temperature exhaust heat Organic Rankine Cycle recovery type - Google Patents
A kind of concentrated sulfuric acid preparation facilities based on low temperature exhaust heat Organic Rankine Cycle recovery type Download PDFInfo
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- CN106477530B CN106477530B CN201610863560.9A CN201610863560A CN106477530B CN 106477530 B CN106477530 B CN 106477530B CN 201610863560 A CN201610863560 A CN 201610863560A CN 106477530 B CN106477530 B CN 106477530B
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Abstract
A kind of concentrated sulfuric acid preparation facilities based on low temperature exhaust heat Organic Rankine Cycle recovery type, including absorption tower, heat pipe evaporator, generator, expanding machine, freezing machine, fluid reservoir, condenser, cyclic acid pump, recycle acid tank, absorption tower is bottom with the dilute slot of acid, it is double-deck filling-material structure in the middle part of absorption tower, heat pipe evaporator heat pipe is passed through high temperature circulation acid, and the recyclable low boiling point of injection mixes organic working medium in steam generator case.The present invention using the circulation type low boiling point mixing traditional water of organic working medium substitution as working media, with evaporation latent heat is small, condensing pressure is close to atmospheric pressure, so as to reveal possibility small for working medium, without complicated vacuum plant；Using expanding machine for generating electricity, steam multipolarity is enable to utilize, reduces pipeloop system damping, while recycles waste heat diversification.
Description
Technical field
The present invention relates to low-temperature heat energy recovery technology field in Chemical Manufacture, more particularly to low in a kind of gas washing in SA production
The circulatory system of potential temperature waste heat recovery, specifically a kind of circulatory system in process of preparing sulfuric acid Low and mid temperature heat recovery.
Background technology
As energy and environment pressure is increasingly prominent, the industrial exhaust heat total amount of low temperature position is huge and is gradually paid close attention to by people.
Low-temperature heat energy efficiently, environmental protection can be converted into the technology of diversification energy by Organic Rankine Cycle as one, into
Research hotspot for waste heat recovery field.It is dense using cold water stream working medium and high temperature in Sulphuric acid low temperature exhaust heat recovery system
Sulfuric acid exchanges heat in heat exchanger, causes steam latent heat excessive, and evaporation is slow, and condensing pressure differs larger with atmospheric pressure, so as to
Working medium leakage possibility is big, need to separately set complicated vacuum plant；Meanwhile high temperature flows through the problems such as pipeline is also easy to produce thermal expansion, vibrations.
Invention content
It is an object of the invention to overcome the above-mentioned prior art insufficient, provide a kind of based on low temperature exhaust heat Organic Rankine Cycle
Process of preparing sulfuric acid heat recovery rate is increased to more than 96% from original 60%, made by the concentrated sulfuric acid preparation facilities of recovery type, the device
The multipolarity of steam energy utilizes, and reduces pipeloop system damping, while recycles waste heat diversification.
The purpose of the present invention is what is be achieved through the following technical solutions：One kind is recycled based on low temperature exhaust heat Organic Rankine Cycle
The concentrated sulfuric acid preparation facilities of formula, it is characterized in that, including absorption tower, heat pipe evaporator, generator, expanding machine, working medium pump,
Freezing machine, cyclic acid pump, cycle acid tank, bevel-type diluter, filler device；The filler device is arranged on middle part in absorption tower,
The bevel-type diluter is placed in below filler device；The cycle acid tank is placed in absorb the bottom of the tower side, and with connecting in absorption tower
It connects and communicates；The cyclic acid pump is arranged in cycle acid tank, and the cyclic acid pump is connect with heat pipe evaporator；The heat
Pipe type steam generator is connect respectively with expanding machine, working medium pump, and the expanding machine connects generator, the freezing machine both ends difference
Connect expanding machine and working medium pump；
Sulfur trioxide gas injects absorption tower by gas distributor adverse current, and dilute sulfuric acid liquid is distributed into absorption by spray equipment
Tower reacts in filler device, enters the dilution of bevel-type diluter after generating high-temperature concentrated sulfuric acid, is diluted to high temperature dilute sulfuric acid, so
The cycle acid tank of bottom of towe side is flowed into afterwards；
The heat-pipe-fluid chamber being pumped into high temperature dilute sulfuric acid by cyclic acid pump in heat pipe evaporator, heat pipe-type steam
Low boiling point organic working medium is passed through by working medium pump in generator case, high-temperature concentrated sulfuric acid by heat after heat pipe heat exchanging with reaching organic work
Matter, and the relatively low concentrated sulfuric acid of temperature is flowed out from heat pipe evaporator right-side outlet after exchanging heat；
Organic working medium, which flows through band, sticks up heat pipe and exchanges heat, and becomes low-pressure steam after reaching certain temperature, steam flows into expansion
Machine drives generator externally to export electric energy by expanding machine, and the lack of gas after expansion, which enter after freezing machine, to be carried out heat exchange and become saturation
State condensed fluid is pumped into heat pipe evaporator babinet using working medium and recycles.
Connecting pipeline between the cycle acid tank and heat pipe evaporator is provided with the anti-hot check valve of string.
The filler device is double-deck filler device.
Bottom is equipped with dilution trap in the absorption tower.
Fluid reservoir is connected between the freezing machine and working medium pump.
Connecting pipeline between the fluid reservoir and working medium pump is provided with throttle valve, and control is passed through working medium flow.
Condenser is connected between the working medium pump and heat pipe evaporator.
It is connected between each component by corrosion-resistant antifatigue bellows, detection controller is separately installed on the bellows
Table, the control instrument include flowmeter, thermometer, liquid level gauge.
Bellows is equipped with the aspirating hole vacuumized, which includes alloy corrugated outer tube and alloy corrugated inner tube, closes
The wave cross section of golden corrugated outer tube is triangular in shape, and outer tube can automatically form a kind of reinforcing rib of stealth when being molded, and improves defeated
The intensity of pipe is sent, the wave cross section of alloy corrugated inner tube is in shoe.
The alloy corrugated outer tube is externally provided with aerogel layer, and thermal insulation is equipped between alloy corrugated outer tube and alloy corrugated inner tube
Layer.
In the present invention, pass through corrosion resistant between absorption tower, cycle acid tank, steam generator, expanding machine, fluid reservoir, freezing machine
Lose antifatigue bellows connection；Double-deck filler device is disposed with inside absorption tower, packing layer lower part is SO3Entrance, tower body bottom
Acid tank with acid dilution function（Dilution trap）；The anti-hot check valve of string（One-way flow valve）Positioned at high-temperature acid pipeline（Bellows）；
Organic working medium is mixed in steam generator case, steam generator heat pipe is passed through high temperature circulation acid, and steam is generated after heat exchange and is passed through
Pipeline is pressed into expanding machine, and the recyclable low boiling point of injection mixes organic working medium in steam generator case.
The present invention has evaporation by the use of the traditional water of circulation type low boiling point mixing organic working medium substitution as working media
Latent heat is small, condensing pressure is close to atmospheric pressure, so as to which working medium leakage possibility is small, without complicated vacuum plant；It is used using expanding machine
In power generation, steam multipolarity is enable to utilize, reduce pipeloop system damping, while recycle waste heat diversification；It absorbs
Tower is reverse-flow integrated multi-functional tower body, and tower bottom sets diluting concentrated sulfuric acid slot, without separately increasing diluter so that the circulatory system
Compacter, degrees of fusion is high.
The present invention can effectively recycle waste heat in gas washing in SA production and generate steam, can make the rate of recovery of waste heat from 60%
More than 95% is increased to, low-pressure steam steam generating capacity generally often produces 1 ton of sulfuric acid and generates 0.6 ton or so of low-pressure steam.
Absorption tower of the present invention is reverse-flow integrated multi-functional tower body, and tower bottom sets diluting concentrated sulfuric acid slot, without increasing
Diluter so that the circulatory system is compacter, and degrees of fusion is high, achievees the purpose that the recycling of low temperature exhaust heat.The present invention provides a kind of
Efficiently, green, the safety low-temperature waste heat recovery circulatory system.
Beneficial effects of the present invention：
Process of preparing sulfuric acid Low and mid temperature heat recovery efficiently can be generated low-pressure steam and electric energy by the present invention, give birth to sulfuric acid
Waste heat recovery rate is increased to 96% or so from 60% during production. art.
Description of the drawings
Fig. 1 low pressure steam recovery process schematic diagrams of the present invention；
Fig. 2 vacuum antiseptic bellows structure figures；
In figure：1 absorption tower, the 2 hot check valves of anti-string, 3 heat pipe evaporators, 4 generators, 5 expanding machines, 6 freezing machines,
7 fluid reservoirs, 8 working medium pumps, 9 condensers, 10 cyclic acid pumps, 11 cycle acid tanks, 12 dilution traps, 13 bevel-type diluters, 14 fillers dress
It puts, 15 aspirating holes, 16 alloy corrugated outer tubes, 17 alloy corrugated inner tubes, 18 aerogel layers, 19 heat insulation layers.
Specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
A kind of concentrated sulfuric acid preparation facilities based on low temperature exhaust heat Organic Rankine Cycle recovery type, including absorption tower 1, heat pipe-type
Steam generator 3, generator 4, expanding machine 5, working medium pump 8, freezing machine 6, cyclic acid pump（10）, cycle acid tank 11, bevel-type dilution
Device 13, filler device 14.
Filler device 14 is double-deck filler device, is arranged on middle part, bevel-type diluter in absorption tower and is placed under filler device
Side；Cycle acid tank is placed in absorb the bottom of the tower side, and is communicated with connection in absorption tower.
Cyclic acid pump is arranged in cycle acid tank, and the cyclic acid pump is connect with heat pipe evaporator.Heat pipe-type steams
Vapour generator is connect respectively with expanding machine, working medium pump, and expanding machine connection generator, the freezing machine both ends connect expanding machine respectively
With working medium pump；
Connecting pipeline between cycle acid tank 11 and heat pipe evaporator 3 is provided with the anti-hot check valve 2 of string, absorption tower
Interior bottom is equipped with dilution trap 12.
Fluid reservoir 7 is connected between freezing machine 6 and working medium pump, the connecting pipeline between fluid reservoir 7 and working medium pump 8 is provided with section
Valve is flowed, control is passed through working medium flow.Condenser 9 is connected between working medium pump and heat pipe evaporator.
It is connected between each component by corrosion-resistant antifatigue bellows, detection controller is separately installed on the bellows
Table, the control instrument include flowmeter, thermometer, liquid level gauge.
Bellows is equipped with the aspirating hole 15 vacuumized, which includes alloy corrugated outer tube 16 and alloy corrugated inner tube
17, the wave cross section of alloy corrugated outer tube is triangular in shape, and outer tube can automatically form a kind of reinforcing rib of stealth when being molded, and carry
The intensity of high delivery pipe, the wave cross section of alloy corrugated inner tube is in shoe.
Alloy corrugated outer tube is externally provided with aerogel layer 18, is equipped between alloy corrugated outer tube 16 and alloy corrugated inner tube 17 exhausted
Thermosphere 19.
High-temperature concentrated sulfuric acid enters bevel-type diluter 13 and dilutes, and is diluted to high temperature dilute sulfuric acid and flows into bottom of towe circulating slot；By following
Naphthenic acid pump 10 is pumped into heat-pipe-fluid chamber in steam generator, and intermediate line is equipped with the anti-hot check valve 2 of string.Lead in steam generator case
Enter low boiling point organic working medium, high-temperature concentrated sulfuric acid by heat after heat pipe heat exchanging with reaching organic working medium, and temperature is relatively low after exchanging heat
Concentrated sulfuric acid right-side outlet flows out；Organic working medium, which flows through band, sticks up heat pipe and exchanges heat, and reaches certain temperature（It is depressed in a normal atmosphere
（101kpa）40-50 degrees Celsius of organic working medium boiling point.Compared with device of working medium, bigger steam pressure is generated at identical temperature）After become low
Steam is pressed, steam flows into expanding machine 5, drives the externally output electric energy of generator 4 by expanding machine 5, the lack of gas after expansion enter cold
Heat exchange is carried out after solidifying machine and becomes saturation state condensed fluid, is sent into steam generator casing and is recycled using working medium pump 8.
Claims (10)
1. a kind of concentrated sulfuric acid preparation facilities based on low temperature exhaust heat Organic Rankine Cycle recovery type, it is characterized in that, including absorption tower
(1), heat pipe evaporator (3), generator (4), expanding machine (5), working medium pump (8), freezing machine (6), cyclic acid pump (10),
Recycle acid tank (11), bevel-type diluter (13), filler device (14)；The filler device is arranged on middle part in absorption tower, described
Bevel-type diluter is placed in below filler device；The cycle acid tank is placed in absorb the bottom of the tower side, and with connecting phase in absorption tower
It is logical；The cyclic acid pump is arranged in cycle acid tank, and the cyclic acid pump is connect with heat pipe evaporator；The heat pipe-type
Steam generator is connect respectively with expanding machine, working medium pump, and the expanding machine connects generator, freezing machine (6) the both ends difference
Connect expanding machine and working medium pump；
Sulfur trioxide gas injects absorption tower (1) by gas distributor adverse current, and dilute sulfuric acid liquid is distributed into absorption tower by spray equipment,
It reacts in filler device (14), enters bevel-type diluter (13) dilution after generating high-temperature concentrated sulfuric acid, be diluted to the dilute sulphur of high temperature
Then acid flows into the cycle acid tank (11) of bottom of towe side；
The heat-pipe-fluid chamber being pumped into high temperature dilute sulfuric acid by cyclic acid pump (10) in heat pipe evaporator (3), heat pipe-type
Low boiling point organic working medium is passed through by working medium pump (8) in steam generator (3) case, high-temperature concentrated sulfuric acid with after heat pipe heat exchanging by heat
Organic working medium is reached, and the relatively low concentrated sulfuric acid of temperature is flowed out from heat pipe evaporator right-side outlet after exchanging heat；
Organic working medium, which flows through band, sticks up heat pipe and exchanges heat, and becomes low-pressure steam after reaching certain temperature, steam flows into expanding machine
(5), generator (4) is driven externally to export electric energy by expanding machine (5), the lack of gas after expansion are changed after entering freezing machine (6)
Thermal change is saturation state condensed fluid, is sent into heat pipe evaporator (3) babinet and recycles using working medium pump (8).
2. a kind of concentrated sulfuric acid based on low temperature exhaust heat Organic Rankine Cycle recovery type according to claims 1 prepares dress
It puts, which is characterized in that the connecting pipeline between the cycle acid tank (11) and heat pipe evaporator (3) is provided with anti-string heat
Check valve (2).
3. a kind of concentrated sulfuric acid based on low temperature exhaust heat Organic Rankine Cycle recovery type according to claims 1 prepares dress
It puts, which is characterized in that the filler device (14) is double-deck filler device.
4. a kind of concentrated sulfuric acid based on low temperature exhaust heat Organic Rankine Cycle recovery type according to claims 1 prepares dress
It puts, which is characterized in that bottom is equipped with dilution trap (12) in the absorption tower.
5. a kind of concentrated sulfuric acid based on low temperature exhaust heat Organic Rankine Cycle recovery type according to claims 1 prepares dress
It puts, which is characterized in that the freezing machine (6) is connected with fluid reservoir (7) between working medium pump.
6. a kind of concentrated sulfuric acid based on low temperature exhaust heat Organic Rankine Cycle recovery type according to claims 5 prepares dress
It puts, which is characterized in that the connecting pipeline between the fluid reservoir (7) and working medium pump (8) is provided with throttle valve, and control is passed through working medium stream
Amount.
7. a kind of concentrated sulfuric acid based on low temperature exhaust heat Organic Rankine Cycle recovery type according to claims 1 prepares dress
It puts, which is characterized in that condenser (9) is connected between the working medium pump and heat pipe evaporator.
8. a kind of concentrated sulfuric acid based on low temperature exhaust heat Organic Rankine Cycle recovery type according to claims 1 prepares dress
It puts, which is characterized in that connected between each component by corrosion-resistant antifatigue bellows, detection control is separately installed on the bellows
Instrument processed, the control instrument include flowmeter, thermometer, liquid level gauge.
9. a kind of concentrated sulfuric acid based on low temperature exhaust heat Organic Rankine Cycle recovery type according to claims 8 prepares dress
It puts, which is characterized in that the bellows is equipped with the aspirating hole (15) vacuumized, which includes alloy corrugated outer tube (16)
With alloy corrugated inner tube (17), the wave cross section of alloy corrugated outer tube is triangular in shape, and outer tube can automatically form one when being molded
The stealthy reinforcing rib of kind improves the intensity of delivery pipe, and the wave cross section of alloy corrugated inner tube is in shoe.
10. a kind of concentrated sulfuric acid based on low temperature exhaust heat Organic Rankine Cycle recovery type according to claims 9 prepares dress
It puts, which is characterized in that the alloy corrugated outer tube is externally provided with aerogel layer (18), in alloy corrugated outer tube (16) and alloy corrugated
Heat insulation layer (19) is equipped between pipe (17).
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| CN201610863560.9A CN106477530B (en) | 2016-09-30 | 2016-09-30 | A kind of concentrated sulfuric acid preparation facilities based on low temperature exhaust heat Organic Rankine Cycle recovery type |
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| CN108441709A (en) * | 2018-05-09 | 2018-08-24 | 天华化工机械及自动化研究设计院有限公司 | Purposes containing the vertical concentrated sulfuric acid cooler of chrome-nickel in the electricity generation system of low temperature position waste-heat recovery device and its composition |
| CN108441708A (en) * | 2018-05-09 | 2018-08-24 | 天华化工机械及自动化研究设计院有限公司 | Purposes of the concentrated sulfuric acid cooler containing chrome-nickel in low temperature position waste-heat recovery device and its electricity generation system |
| CN112696963A (en) * | 2020-12-07 | 2021-04-23 | 中国恩菲工程技术有限公司 | Low-temperature waste heat recovery system of smelting flue gas acid making system |
| CN112610939A (en) * | 2020-12-17 | 2021-04-06 | 襄阳龙蟒钛业有限公司 | Recovery method and recovery system for low-level waste heat of sand acid |
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| CN2729040Y (en) * | 2004-10-12 | 2005-09-28 | 南化集团研究院 | Heat recovering tower for low temp thermal energy recovery of sulfuric acid manufacture |
| CN101781998A (en) * | 2009-12-30 | 2010-07-21 | 瓮福（集团）有限责任公司 | Method for recovering low-temperature level heat energy in acid making in sulfuric acid production |
| CN105179035A (en) * | 2015-07-21 | 2015-12-23 | 江苏乐科热力科技有限公司 | Low-temperature waste-heat organic Rankine cycle power generation system |
| CN105275514A (en) * | 2015-11-23 | 2016-01-27 | 厦门东方富源环保科技有限公司 | Waste gas dedusting and waste heat low-temperature exhaust heat organic Rankine cycle power generation system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2729040Y (en) * | 2004-10-12 | 2005-09-28 | 南化集团研究院 | Heat recovering tower for low temp thermal energy recovery of sulfuric acid manufacture |
| CN101781998A (en) * | 2009-12-30 | 2010-07-21 | 瓮福（集团）有限责任公司 | Method for recovering low-temperature level heat energy in acid making in sulfuric acid production |
| CN105179035A (en) * | 2015-07-21 | 2015-12-23 | 江苏乐科热力科技有限公司 | Low-temperature waste-heat organic Rankine cycle power generation system |
| CN105275514A (en) * | 2015-11-23 | 2016-01-27 | 厦门东方富源环保科技有限公司 | Waste gas dedusting and waste heat low-temperature exhaust heat organic Rankine cycle power generation system |
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