CN106477530A - A kind of concentrated sulfuric acid preparation facilities based on low temperature exhaust heat organic Rankine bottoming cycle recovery type - Google Patents
A kind of concentrated sulfuric acid preparation facilities based on low temperature exhaust heat organic Rankine bottoming cycle recovery type Download PDFInfo
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- CN106477530A CN106477530A CN201610863560.9A CN201610863560A CN106477530A CN 106477530 A CN106477530 A CN 106477530A CN 201610863560 A CN201610863560 A CN 201610863560A CN 106477530 A CN106477530 A CN 106477530A
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- sulfuric acid
- working medium
- heat
- concentrated sulfuric
- heat pipe
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/76—Preparation by contact processes
- C01B17/775—Liquid phase contacting processes or wet catalysis processes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
A kind of concentrated sulfuric acid preparation facilities based on low temperature exhaust heat organic Rankine bottoming cycle recovery type, including absorption tower, heat pipe evaporator, generator, decompressor, freezing machine, fluid reservoir, condenser, cyclic acid pump, recycle acid tank, absorption tower carries sour dilute groove for bottom, 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 in steam generator case, injection low boiling capable of circulation mixes organic working medium.The present invention replaces traditional water as working media by the use of circulation type low boiling mixing organic working medium, and which has, and evaporation latent heat is little, condensing pressure is close to atmospheric pressure, reveals possibility so as to working medium little, without the need for complicated vacuum plant；It is used for generating electricity using decompressor, utilizes steam-energy multipolarity, reduce 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, low in more particularly to 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 highlighted, the industrial exhaust heat total amount of low temperature position is huge and is gradually paid close attention to by people.
Organic Rankine bottoming cycle as one can efficiently, low-temperature heat energy is converted into environmental protection the technology of diversification energy, become
Study hotspot for waste heat recovery field.In Sulphuric acid low temperature exhaust heat recovery system, dense using cold water stream working medium and high temperature
Sulfuric acid heat exchange in heat exchanger, causes steam latent heat excessive, and evaporation is slow, and its condensing pressure differs larger with atmospheric pressure, so as to
Working medium reveals possibility greatly, need to separately set complicated vacuum plant；Meanwhile, high temperature flows through pipeline and is also easy to produce the problems such as thermal expansion, vibrations.
Content of the invention
It is an object of the invention to overcoming above-mentioned prior art not enough, provide a kind of based on low temperature exhaust heat organic Rankine bottoming cycle
Process of preparing sulfuric acid heat recovery rate is brought up to more than 96% from original 60% by the concentrated sulfuric acid preparation facilities of recovery type, the device, is made
Steam-energy multipolarity is utilized, and reduces pipeloop system damping, while recycling waste heat diversification.
The purpose of the present invention is achieved through the following technical solutions：One kind is reclaimed based on low temperature exhaust heat organic Rankine bottoming cycle
The concentrated sulfuric acid preparation facilities of formula, is characterized in that, including absorption tower, heat pipe evaporator, generator, decompressor, working medium pump,
Freezing machine, cyclic acid pump, circulation acid tank, bevel-type diluter, filler device；Described filler device is arranged on middle part in absorption tower,
The bevel-type diluter is placed in below filler device；The circulation acid tank is placed in absorption tower bottom side, and with absorption tower in connect
Connect and communicate；The cyclic acid pump is arranged in circulation acid tank, and the cyclic acid pump is connected with heat pipe evaporator；The heat
Pipe type steam generator is connected with decompressor, working medium pump respectively, and the decompressor connects generator, the freezing machine two ends difference
Connection decompressor and working medium pump；
Sulfur trioxide gas inject absorption tower by gas distributor adverse current, and dilute sulfuric acid liquid is distributed into absorption tower by spray equipment,
Filler device reacts, and enters the dilution of bevel-type diluter, be diluted to high temperature dilute sulfuric acid, then flow into after generating high-temperature concentrated sulfuric acid
The circulation acid tank of bottom of towe side；
High temperature dilute sulfuric acid is pumped into the heat-pipe-fluid chamber in heat pipe evaporator, heat pipe-type steam generation by cyclic acid pump
Low boiling organic working medium is passed through by working medium pump in device case, heat is reached organic working medium after high-temperature concentrated sulfuric acid and heat pipe heat exchanging,
And the relatively low concentrated sulfuric acid of temperature is flowed out from heat pipe evaporator right-side outlet after heat exchange；
Organic working medium flows through band sticks up heat pipe carries out heat exchange, is changed into low-pressure steam after reaching uniform temperature, and steam flows into decompressor, leads to
Crossing decompressor drives generator externally to export electric energy, and weary gas after expansion carries out heat exchange after entering freezing machine to be changed into saturation state cold
Lime set body, then the utilization of heat pipe evaporator casing interior circulation is pumped into through working medium.
Connecting pipeline between the circulation acid tank and heat pipe evaporator is provided with the hot check valve of anti-string.
Described filler device is double-deck filler device.
The absorption tower inner bottom part is provided with dilution trap.
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 choke valve, and control is passed through working medium flow.
Condenser is connected between the working medium pump and heat pipe evaporator.
By corrosion-resistant antifatigue bellows connection between each part, detection controller on the bellows, is separately installed with
Table, the control instrument include flowmeter, thermometer, liquid level gauge.
Bellows is provided with the aspirating hole for vacuumizing, and the bellows 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 reinforcement of stealth when being molded, improve 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, is provided with thermal insulation between alloy corrugated outer tube and alloy corrugated inner tube
Layer.
In the present invention, absorption tower, circulation acid tank, steam generator, decompressor, fluid reservoir, pass through corrosion resistant between freezing machine
Lose the connection of antifatigue bellows；Double-deck filler device is disposed with inside absorption tower, and packing layer bottom is SO3Entrance, tower body bottom
Acid tank with acid dilution function（Dilution trap）；The hot check valve of anti-string（One-way flow valve）Positioned at high-temperature acid pipeline（Bellows）；
Organic working medium is mixed with steam generator case, steam generator heat pipe is passed through high temperature circulation acid, produce steam and pass through after heat exchange
Pipeline is pressed into injection low boiling capable of circulation in decompressor, steam generator case and mixes organic working medium.
The present invention replaces traditional water as working media by the use of circulation type low boiling mixing organic working medium, and which has evaporation
Latent heat is little, condensing pressure is close to atmospheric pressure, little so as to working medium leakage possibility, without the need for complicated vacuum plant；Used using decompressor
In generating, utilize steam-energy multipolarity, reduce pipeloop system damping, while recycling waste heat diversification；Absorb
Tower is reverse-flow integrated multi-functional tower body, and tower bottom arranges diluting concentrated sulfuric acid groove, without the need for separately increasing diluter so that the circulatory system
Compacter, degrees of fusion is high.
The present invention can effectively reclaim in gas washing in SA production waste heat and produce steam, can make the rate of recovery of waste heat from 60%
More than 95% is brought up to, low-pressure steam steam generating capacity generally often produces 1 ton of sulfuric acid and produces 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 arranges diluting concentrated sulfuric acid groove, without the need for increasing
Diluter so that the circulatory system is compacter, degrees of fusion are high, reach the purpose of the recovery 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 produced low-pressure steam and electric energy by the present invention, make gas washing in SA production work
During skill, waste heat recovery rate brings up to 96% or so from 60%.
Description of the drawings
Fig. 1 low pressure steam recovery process sketch of the present invention；
Fig. 2 vacuum antiseptic bellows structure figure；
In figure：1 absorption tower, the 2 hot check valves of anti-string, 3 heat pipe evaporators, 4 generators, 5 decompressors, 6 freezing machines, 7 storages
Flow container, 8 working medium pumps, 9 condensers, 10 cyclic acid pumps, 11 circulation acid tanks, 12 dilution traps, 13 bevel-type diluters, 14 filler devices,
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 bottoming cycle recovery type, including absorption tower 1, heat pipe-type
Steam generator 3, generator 4, decompressor 5, working medium pump 8, freezing machine 6, cyclic acid pump（10）, circulation acid tank 11, bevel-type dilution
Device 13, filler device 14.
Filler device 14 is double-deck filler device, is arranged on middle part in absorption tower, and bevel-type diluter is placed under filler device
Side；Circulation acid tank is placed in absorption tower bottom side, and communicates with being connected in absorption tower.
Cyclic acid pump is arranged in circulation acid tank, and the cyclic acid pump is connected with heat pipe evaporator.Heat pipe-type steams
Vapour generator is connected with decompressor, working medium pump respectively, and decompressor connects generator, and the freezing machine two ends connect decompressor respectively
With working medium pump；
Connecting pipeline between circulation acid tank 11 and heat pipe evaporator 3 is provided with the hot check valve 2 of anti-string, and in absorption tower bottom
Portion is provided with dilution trap 12.
Fluid reservoir 7 is connected between freezing machine 6 and working medium pump, and the connecting pipeline between fluid reservoir 7 and working medium pump 8 is provided with section
Stream valve, control are passed through working medium flow.Condenser 9 is connected between working medium pump and heat pipe evaporator.
By corrosion-resistant antifatigue bellows connection between each part, detection controller on the bellows, is separately installed with
Table, the control instrument include flowmeter, thermometer, liquid level gauge.
Bellows is provided with the aspirating hole 15 for vacuumizing, and the bellows 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 reinforcement of stealth when being molded, 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 provided with absolutely between alloy corrugated outer tube 16 and alloy corrugated inner tube 17
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 pumps into heat-pipe-fluid chamber in steam generator, and intermediate line is equipped with the hot check valve 2 of anti-string.Lead in steam generator case
Enter low boiling organic working medium, heat is reached organic working medium after high-temperature concentrated sulfuric acid and heat pipe heat exchanging, and temperature is relatively low after heat exchange
Concentrated sulfuric acid right-side outlet flows out；Organic working medium flows through band sticks up heat pipe carries out heat exchange, reaches uniform temperature（Depress in a normal atmosphere
（101kpa）40-50 degree Celsius of organic working medium boiling point.Compared with device of working medium, bigger steam pressure at identical temperature, is produced）After be changed into low
Pressure steam, steam flow into decompressor 5, drive generator 4 externally to export electric energy by decompressor 5, and the weary gas after expansion enters cold
Carry out heat exchange and be changed into saturation state condensed fluid, then send into steam generator casing interior circulation through working medium pump 8 utilizing after solidifying machine.
Claims (10)
1. a kind of concentrated sulfuric acid preparation facilities based on low temperature exhaust heat organic Rankine bottoming cycle recovery type, is characterized in that, including absorption tower
（1）, heat pipe evaporator（3）, generator（4）, decompressor（5）, working medium pump（8）, freezing machine（6）, cyclic acid pump（10）、
Circulation acid tank（11）, bevel-type diluter（13）, filler device（14）；Described filler device is arranged on middle part in absorption tower, described
Bevel-type diluter is placed in below filler device；The circulation acid tank is placed in absorption tower bottom side, and is connected phase with absorption tower
Logical；The cyclic acid pump is arranged in circulation acid tank, and the cyclic acid pump is connected with heat pipe evaporator；The heat pipe-type
Steam generator is connected with decompressor, working medium pump respectively, and the decompressor connects generator, the freezing machine（6）Two ends are distinguished
Connection decompressor and working medium pump；
Sulfur trioxide gas inject absorption tower by gas distributor adverse current（1）, dilute sulfuric acid liquid is distributed into absorption tower by spray equipment,
In filler device（14）React, after generating high-temperature concentrated sulfuric acid, enter bevel-type diluter（13）Dilution, is diluted to the dilute sulphur of high temperature
Acid, then flows into the circulation acid tank of bottom of towe side（11）；
By cyclic acid pump（10）High temperature dilute sulfuric acid is pumped into heat pipe evaporator（3）Interior heat-pipe-fluid chamber, heat pipe-type
Steam generator（3）Pass through working medium pump in case（8）Low boiling organic working medium is passed through, by heat after high-temperature concentrated sulfuric acid and heat pipe heat exchanging
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 heat exchange；
Organic working medium flows through band sticks up heat pipe carries out heat exchange, is changed into low-pressure steam after reaching uniform temperature, and steam flows into decompressor
（5）, by decompressor（5）Drive generator（4）Electric energy is externally exported, and the weary gas after expansion enters freezing machine（6）After changed
Heat is changed into saturation state condensed fluid, then through working medium pump（8）Send into heat pipe evaporator（3）Casing interior circulation is utilized.
2. a kind of concentrated sulfuric acid based on low temperature exhaust heat organic Rankine bottoming cycle recovery type according to claims 1 prepares dress
Put, it is characterised in that the circulation acid tank（11）With heat pipe evaporator（3）Between connecting pipeline be provided with anti-string heat
Check valve（2）.
3. a kind of concentrated sulfuric acid based on low temperature exhaust heat organic Rankine bottoming cycle recovery type according to claims 1 prepares dress
Put, it is characterised in that described filler device（14）For double-deck filler device.
4. a kind of concentrated sulfuric acid based on low temperature exhaust heat organic Rankine bottoming cycle recovery type according to claims 1 prepares dress
Put, it is characterised in that the absorption tower inner bottom part is provided with dilution trap（12）.
5. a kind of concentrated sulfuric acid based on low temperature exhaust heat organic Rankine bottoming cycle recovery type according to claims 1 prepares dress
Put, it is characterised in that the freezing machine（6）Fluid reservoir is connected between working medium pump（7）.
6. a kind of concentrated sulfuric acid based on low temperature exhaust heat organic Rankine bottoming cycle recovery type according to claims 5 prepares dress
Put, it is characterised in that the fluid reservoir（7）With working medium pump（8）Between connecting pipeline be provided with choke valve, control is passed through working medium stream
Amount.
7. a kind of concentrated sulfuric acid based on low temperature exhaust heat organic Rankine bottoming cycle recovery type according to claims 1 prepares dress
Put, it is characterised in that between the working medium pump and heat pipe evaporator, be connected with condenser（9）.
8. a kind of concentrated sulfuric acid based on low temperature exhaust heat organic Rankine bottoming cycle recovery type according to claims 1 prepares dress
Put, it is characterised in that by corrosion-resistant antifatigue bellows connection between each part, on the bellows, be separately installed with detection control
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 bottoming cycle recovery type according to claims 1 prepares dress
Put, it is characterised in that the bellows is provided with the aspirating hole for vacuumizing（15）, the bellows 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
Stealthy reinforcement is planted, the intensity of delivery pipe is improved, 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 bottoming cycle recovery type according to claims 1 prepares dress
Put, it is characterised in that the alloy corrugated outer tube is externally provided with aerogel layer（18）, alloy corrugated outer tube（16）In alloy corrugated
Pipe（17）Between be provided with heat insulation layer（19）.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
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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 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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