CN203392858U - Recovery system for sulfur dioxide conversion waste heat in acid production process through sulfuric acid - Google Patents
Recovery system for sulfur dioxide conversion waste heat in acid production process through sulfuric acid Download PDFInfo
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- CN203392858U CN203392858U CN201320381606.5U CN201320381606U CN203392858U CN 203392858 U CN203392858 U CN 203392858U CN 201320381606 U CN201320381606 U CN 201320381606U CN 203392858 U CN203392858 U CN 203392858U
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- converter
- melting salt
- sulfur dioxide
- inlet pipe
- waste heat
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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
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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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Abstract
The utility model provides a recovery system for sulfur dioxide conversion waste heat in an acid production process through sulfuric acid. The recovery system comprises a pre-converter, a waste heat recovery boiler and a fused salt circulating tank, wherein one end of the pre-converter is connected to the fused salt circulating tank, the other end of the pre-converter is connected with the waste heat recovery boiler, the fused salt circulating tank is connected with the waste heat recovery boiler through a liquid return pipe, a fused salt circulating pump is connected to a fused salt inlet pipe, one end, which is connected to a fused salt outlet pipe, of the pre-converter is also connected to an exhaust gas inlet pipe, and one end, which is connected to the fused salt inlet pipe, of the pre-converter is also connected to an exhaust gas outlet pipe. The recovery system has the advantages that the heat balance of a conversion working procedure can be maintained all the time under the adverse condition of great fluctuation of the concentration of sulfur dioxide gas, the reaction waste heat generated by converting the sulfur dioxide into sulfur trioxide can be effectively recovered, and the normal operation of a an acid production system through sulfuric acid under the condition of great fluctuation of the concentration of the sulfur dioxide gas is satisfied.
Description
Technical field
The utility model belongs to sulfuric acid relieving haperacidity technical field, relates to Sulphur Dioxide residual neat recovering system in a kind of sulfuric acid acid-making process.
Background technology
In sulfuric acid metallurgical off-gas acid-making, Sulphur Dioxide is that sulphur trioxide can be emitted a large amount of heat.And the technique that Sulphur Dioxide is sulphur trioxide just has more than ten to plant, in recent years, for the object of environment protection, all adopt twice conversion process both at home and abroad.In Sulphur Dioxide process, water balance and thermal equilibrium are the difficult points that system is produced.The sulfur dioxide flue gas amount and the concentration that enter conversion procedure must maintain in scope of design, the heat balance of guarantee conversion procedure.Yet in sulfuric acid actual production process, conversion procedure sulfur dioxide flue gas fluctuation of concentration is large, the phenomenon that exceeds standard happens occasionally.When entering conversion procedure sulfur dioxide concentration higher than design load, conversion procedure heat can be superfluous, thereby cause that catalyst is overheated, activity decreased, work-ing life shorten, and even causes the installations and facilities distortion such as convertor, damages, amount of heat loss; When entering conversion procedure sulfur dioxide concentration lower than design load, conversion procedure will be difficult to maintain autothermal equilibrium, and the heating device concurrent heatings such as electric furnace, gas furnace that need come into operation increase the sour energy consumption of ton, even cause condensation acid to build up, corrode interchanger.Therefore, conversion procedure sulfur dioxide flue gas excessive concentration or too low, the normal operation of all serious threat gas washing in SA production, and the current method that also there is no effectively to process this problem.
Utility model content
The purpose of this utility model is to provide Sulphur Dioxide residual neat recovering system in a kind of sulfuric acid acid-making process, to solve in existing Sulphur Dioxide process, because sulfur dioxide flue gas fluctuation of concentration affects greatly the normal problem of producing of sulfuric acid.
For this reason, the utility model adopts following technical scheme:
Sulphur Dioxide residual neat recovering system in a kind of sulfuric acid acid-making process, comprise pre-converter, heat recovery boiler and melting salt circulation groove, in described pre-converter, be provided with catalyst tubulation, described pre-converter one end is connected with melting salt circulation groove by melting salt inlet pipe, the other end is connected with heat recovery boiler by melting salt outlet pipe, between described melting salt circulation groove and heat recovery boiler, by liquid returning tube, be connected, on described melting salt inlet pipe, be connected with melting salt recycle pump, described pre-converter connects melting salt outlet pipe one end and is also connected with smoke inlet pipe, connect melting salt inlet pipe one end and be also connected with flue gas escape pipe.
Further, described melting salt inlet pipe is connected with pre-converter bottom, and described melting salt outlet pipe is connected with pre-converter top.
The beneficial effects of the utility model are: the utility model can maintain all the time conversion procedure thermal equilibrium under the large unfavourable condition of sulfur dioxide flue gas fluctuation of concentration, and can efficient recovery the Sulphur Dioxide residual heat of reaction that is sulphur trioxide, met the normal operation of sulfuric acid acid making system in the situation that sulfur dioxide flue gas fluctuation of concentration is large; And simple in structure, reliable.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, 1-pre-converter, 2-heat recovery boiler, 3-melting salt circulation groove, 4-catalyst tubulation, 5-melting salt inlet pipe, 6-melting salt outlet pipe, 7-liquid returning tube, 8-melting salt recycle pump, 9-smoke inlet pipe, 10-flue gas escape pipe.
Embodiment
As shown in Figure 1, Sulphur Dioxide residual neat recovering system in a kind of sulfuric acid acid-making process, comprise pre-converter 1, heat recovery boiler 2 and melting salt circulation groove 3, in pre-converter 1, be provided with catalyst tubulation 4, pre-converter 1 bottom is connected with melting salt circulation groove 3 by melting salt inlet pipe 5, top end is connected with heat recovery boiler 2 by melting salt outlet pipe 6, between melting salt circulation groove 3 and heat recovery boiler 2, by liquid returning tube 7, be connected, on melting salt inlet pipe 5, be connected with melting salt recycle pump 8, pre-converter 1 top is also connected with smoke inlet pipe 9, bottom is also connected with flue gas escape pipe 10.
Working process of the present utility model is as follows: sulfur dioxide flue gas flows into pre-converter 1 by smoke inlet pipe 9 and flowed out by flue gas escape pipe 10, and the melting salt in melting salt circulation groove 3 enters pre-converter 1 by melting salt inlet pipe 5 and flowed out by melting salt outlet pipe 6.In the catalyst tubulation 4 of pre-converter 1, be filled with catalyst, sulfurous gas is through the tube side of pre-converter catalyst tubulation 4, melting salt is through the shell side of pre-converter 1, sulfur dioxide flue gas contacts with catalyst and be converted into sulphur trioxide under catalyst katalysis in catalyst tubulation 4 processes of flowing through, and discharges large calorimetric simultaneously.In figure, filled arrows represents melting salt flow direction, and hollow arrow represents sulfur dioxide flue gas flow direction.
In this process, sulfur dioxide flue gas and melting salt counter current contact, heat exchange, utilize the high heat storage performance of melting salt, and the transition heat of sulfurous gas is stored in melting salt.And, when sulfur dioxide flue gas concentration is high, utilizes melting salt that heat recovery boiler 2 is walked to enter in the Partial Conversion torrid zone of sulfurous gas and carry out heat recovery, prevent that catalyst is overheated and burn; When SO 2 from fume concentration is low, the heat release that melting salt is carried out, to catalyst insulation, is supplemented part heat, has reduced the rate of utilization of heat patching device.Subsequently, melting salt is got back to again melting salt circulation groove 3 carrying out (waste heat recovery not occurring) when temperature is lower after waste heat recovery through heat recovery boiler 2, as lower in melting salt temperature, enters a heat exchange circulation mending Wen Houzai.In working cycle, melting salt liquid pump 8 is for melting salt provides circulation power, and sulfur dioxide flue gas provides mobilization dynamic by the blower fan of sulfuric acid acid making system for it.
Claims (2)
1. Sulphur Dioxide residual neat recovering system in a sulfuric acid acid-making process, it is characterized in that, comprise pre-converter, heat recovery boiler and melting salt circulation groove, in described pre-converter, be provided with catalyst tubulation, described pre-converter one end is connected with melting salt circulation groove by melting salt inlet pipe, the other end is connected with heat recovery boiler by melting salt outlet pipe, between described melting salt circulation groove and heat recovery boiler, by liquid returning tube, be connected, on described melting salt inlet pipe, be connected with melting salt recycle pump, described pre-converter connects melting salt outlet pipe one end and is also connected with smoke inlet pipe, connect melting salt inlet pipe one end and be also connected with flue gas escape pipe.
2. Sulphur Dioxide residual neat recovering system in a kind of sulfuric acid acid-making process according to claim 1, is characterized in that, described melting salt inlet pipe is connected with pre-converter bottom, and described melting salt outlet pipe is connected with pre-converter top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320381606.5U CN203392858U (en) | 2013-06-30 | 2013-06-30 | Recovery system for sulfur dioxide conversion waste heat in acid production process through sulfuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320381606.5U CN203392858U (en) | 2013-06-30 | 2013-06-30 | Recovery system for sulfur dioxide conversion waste heat in acid production process through sulfuric acid |
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| CN203392858U true CN203392858U (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320381606.5U Expired - Fee Related CN203392858U (en) | 2013-06-30 | 2013-06-30 | Recovery system for sulfur dioxide conversion waste heat in acid production process through sulfuric acid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104629814A (en) * | 2015-02-03 | 2015-05-20 | 北京神雾环境能源科技集团股份有限公司 | Fluidized-bed gasified gas afterheat recycling and purifying system and application thereof |
| CN110052223A (en) * | 2019-05-20 | 2019-07-26 | 陕西金泰氯碱化工有限公司 | A kind of mercury-free catalyzes and synthesizes the device that vinyl chloride moves heat using higher boiling aqueous solution |
-
2013
- 2013-06-30 CN CN201320381606.5U patent/CN203392858U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104629814A (en) * | 2015-02-03 | 2015-05-20 | 北京神雾环境能源科技集团股份有限公司 | Fluidized-bed gasified gas afterheat recycling and purifying system and application thereof |
| CN110052223A (en) * | 2019-05-20 | 2019-07-26 | 陕西金泰氯碱化工有限公司 | A kind of mercury-free catalyzes and synthesizes the device that vinyl chloride moves heat using higher boiling aqueous solution |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20190630 |
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| CF01 | Termination of patent right due to non-payment of annual fee |