CN110639460A - Temperature control system for exothermic reaction process - Google Patents
Temperature control system for exothermic reaction process Download PDFInfo
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- CN110639460A CN110639460A CN201910999926.9A CN201910999926A CN110639460A CN 110639460 A CN110639460 A CN 110639460A CN 201910999926 A CN201910999926 A CN 201910999926A CN 110639460 A CN110639460 A CN 110639460A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 35
- 239000002826 coolant Substances 0.000 claims abstract description 22
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 10
- 230000001276 controlling effect Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 28
- 238000007254 oxidation reaction Methods 0.000 description 18
- 235000011037 adipic acid Nutrition 0.000 description 14
- 239000001361 adipic acid Substances 0.000 description 14
- 230000003647 oxidation Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 9
- 229910017604 nitric acid Inorganic materials 0.000 description 9
- 239000002253 acid Substances 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 5
- HGCIXCUEYOPUTN-UHFFFAOYSA-N cyclohexene Chemical compound C1CCC=CC1 HGCIXCUEYOPUTN-UHFFFAOYSA-N 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- -1 alcohol ketone Chemical class 0.000 description 1
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000002649 leather substitute Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00076—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements inside the reactor
- B01J2219/00081—Tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
A temperature control system for an exothermic reaction process comprises a driving pump, a first heat exchanger, a second heat exchanger and a flow controller, wherein a cooling medium inlet of the first heat exchanger is connected with an outlet of the driving pump through a pipeline, a cooling medium outlet is connected with a cooled medium inlet of the second heat exchanger through a pipeline, a cooled medium outlet of the second heat exchanger is connected with an inlet of the driving pump through a pipeline to form a closed circulation line, the flow controller is connected on the closed circulation line in series, the temperature control system also comprises an emergency bypass pipeline or a pressure type overflow valve, the upstream end of the emergency bypass pipeline is connected with an inlet of the flow controller in parallel, the downstream end of the emergency bypass pipeline is connected with an outlet of the flow controller in parallel, the flow area of the emergency bypass pipeline is 1/9-1/2 of the flow area of the flow controller, an inlet of the pressure type overflow valve is connected with an inlet, the outlet is connected in parallel with the outlet of the flow controller. The invention has simple structure and high reliability, and effectively meets the requirement of safe production in the exothermic reaction process.
Description
Technical Field
The invention relates to the field of chemical industry, in particular to a temperature control system for an exothermic reaction process.
Background
In the chemical field, an exothermic reaction process is involved, and the temperature of the process needs to be strictly controlled and kept in a proper range so as to ensure that the reaction is normally carried out.
For example, the production of adipic acid. Adipic acid belongs to aliphatic carboxylic acid, commonly called as adipic acid, and has a molecular formula of C6H10O4The appearance is white crystal powder, the property is stable, and the deliquescence is avoided. The product is mainly used for preparing nylon 66 (nylon 66) and polyurethane resin, and then is used for preparing plasticizer and lubricating grease, and is used as acid increasing agent for food in small amount and used for replacing tartaric acid to prepare baking powder, and also can be used for preparing pesticide and adhesive, and the adipic acid is also used for producing medicine, perfume, etc. At present, the industries with fast increase of the domestic use amount comprise the resin industry for synthetic leather, the polyurethane sole resin industry, the polyurethane adhesive and the polyol industry for TPU. There are four methods of adipic acid production in the world today: phenol, butadiene, cyclohexane and cyclohexene processes. The cyclohexane method and the cyclohexene method are mature and are main production methods. The four methods for producing adipic acid are to oxidize cyclohexanol or cyclohexanol/cyclohexanone mixture with nitric acid, commonly called nitric acid oxidation method。
Crude acid generated after nitric acid oxidation reaction enters a crude acid crystallizer for adiabatic cooling evaporation, the crystallized crude acid slurry is thickened and centrifuged by the crude acid, then solid-liquid separation is carried out to obtain crude adipic acid, and the crude adipic acid is dissolved and decolored and then sent to an industrial acid crystallizer. And thickening, centrifuging, dissolving and decoloring the crystallized slurry again to obtain the industrial grade adipic acid. And crystallizing, thickening and centrifuging the industrial-grade adipic acid, and then drying the industrial-grade adipic acid in a fluidized bed to obtain the product of refined adipic acid. Nitrous gas generated by oxidation is absorbed by a nitrogen oxide absorption post to produce dilute nitric acid, and the thickened filtrate is concentrated by nitric acid and then recovered. The dibasic acid is evaporated twice, washed twice with resin, evaporated, sliced and packaged to obtain the byproduct dibasic acid. The catalyst is recycled and enters the system again after being subjected to resin adsorption twice.
In the adipic acid production process, the heat release of the nitric acid oxidation reaction process is large, so that the nitric acid oxidation reaction process adopts circulating water for cooling, and the circulating amount of cooling water is controlled by controlling the opening of a regulating valve on a circulating water path so as to control the temperature of the reaction process. However, if the regulating valve is closed due to a fault, the flow rate of the circulating water is greatly reduced, even is zero, and the reaction heat cannot be removed in time, so that the oxidation reaction temperature is out of control.
Therefore, how to design a safe and reliable temperature control system for exothermic reaction process is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a temperature control system for an exothermic reaction process, which has a simple structure and high reliability and effectively meets the requirement of safe production in the exothermic reaction process, aiming at the defects of the prior art.
The technical scheme of the invention is as follows: a temperature control system of an exothermic reaction process comprises a driving pump, a first heat exchanger, a second heat exchanger and a flow controller, wherein the first heat exchanger is used for absorbing heat of the exothermic reaction process, the second heat exchanger is used for releasing heat to the outside, a cooling medium inlet of the first heat exchanger is connected with an outlet of the driving pump through a pipeline, a cooling medium outlet of the first heat exchanger is connected with a cooled medium inlet of the second heat exchanger through a pipeline, a cooled medium outlet of the second heat exchanger is connected with an inlet of the driving pump through a pipeline to form a closed circulation circuit, the flow controller is connected with the closed circulation circuit in series and used for adjusting circulation flow of the closed circulation circuit, the temperature control system further comprises an emergency bypass pipeline or a pressure type overflow valve, and the upstream end of the emergency bypass pipeline is connected with an inlet of the flow controller in parallel, the downstream end of the emergency bypass pipeline is connected with the outlet of the flow controller in parallel, the flow area of the emergency bypass pipeline is 1/9-1/2 of the flow area of the flow controller, the inlet of the pressure type overflow valve is connected with the inlet of the flow controller in parallel, and the outlet of the pressure overflow valve is connected with the outlet of the flow controller in parallel.
The first heat exchanger is a coiled pipe, the upstream end of the coiled pipe is a cooling medium inlet, and the downstream end of the coiled pipe is a cooling medium outlet.
The second heat exchanger is a plate heat exchanger and/or a tube heat exchanger.
The flow controller is a flow regulating valve.
And a flow-limiting orifice plate is arranged in the emergency bypass pipeline, and the flow area of the flow-limiting orifice plate is 1/9-1/2 of the flow area of the flow controller.
And a cooling medium expansion tank is connected in series between the cooled medium outlet of the second heat exchanger and the inlet of the driving pump.
The inlet of the flow controller is connected with the cooling medium outlet of the first heat exchanger through a pipeline, and the outlet of the flow controller is connected with the cooled medium inlet of the second heat exchanger through a pipeline.
The upstream end of the emergency bypass pipeline is connected between the cooling medium outlet of the first heat exchanger and the inlet of the flow controller in parallel, and the downstream end of the emergency bypass pipeline is connected between the outlet of the flow controller and the cooled medium inlet of the second heat exchanger in parallel.
Adopt above-mentioned technical scheme to have following beneficial effect:
1. the first heat exchanger is used for absorbing heat in an exothermic reaction process and reducing the temperature of the exothermic reaction process, and the second heat exchanger is used for releasing heat to the outside and reducing the temperature of a medium in the closed circulation circuit, so that the heat released in the exothermic reaction process is released quickly, and the requirement of safe production in the exothermic reaction process is met. The flow of the medium in the closed circulation line is adjusted by adjusting the opening of the flow controller, so that the requirement for adjusting the temperature of the exothermic reaction process is met.
2. The invention can set an emergency bypass pipeline, the upstream end of the emergency bypass pipeline is connected in parallel with the inlet of the flow controller, the downstream end of the emergency bypass pipeline is connected in parallel with the outlet of the flow controller, when the flow controller is in a full-closed or nearly full-closed state due to faults (including self faults of the flow controller or faults of the controller controlling the flow controller, etc.) or artificial misoperation, the medium in the closed circulation line keeps part of the medium to normally circulate through the emergency bypass pipeline, thereby effectively slowing down the temperature rise amplitude of the exothermic reaction process, increasing the correction time of working personnel and realizing the safe and controllable fault state.
3. The flow area of the emergency bypass pipeline which can be arranged in the invention is 1/9-1/2 of the flow area of the flow controller, and on the premise of meeting the normal circulation of part of the medium in the closed circulation line in an emergency state, the flow controller can be regulated to control the medium flow of the closed circulation line, so that the requirement of regulating the temperature of the exothermic reaction process is met. If the flow area of the emergency bypass pipeline is too small, the purpose of emergency circulation cannot be achieved, and if the flow area of the emergency bypass pipeline is too large, the requirement for adjusting the temperature of the exothermic reaction process cannot be met.
4. The inlet of the pressure type overflow valve which can be arranged in the invention is connected with the inlet of the flow controller in parallel, the outlet of the pressure overflow valve is connected with the outlet of the flow controller in parallel, when the flow controller works normally, the medium in the closed circulation line passes normally along the flow controller, and the flow of the medium in the closed circulation line is adjusted by the flow controller. When the flow controller is in a full-closed or nearly full-closed state due to faults (including the self fault of the flow controller, the fault of the controller controlling the flow controller and the like) or manual misoperation, the pressure of a medium in the closed circulating pipeline is increased, after the pressure exceeds the opening pressure of the pressure type overflow valve, the pressure type overflow valve is opened, the medium in the closed circulating pipeline keeps normal circulation of the medium through the pressure type overflow valve, the temperature rise amplitude of an exothermic reaction process is effectively reduced, the correction time of workers is increased, and the safe and controllable fault state is realized.
The following further description is made with reference to the accompanying drawings and detailed description.
Drawings
FIG. 1 is a schematic connection diagram of the present invention;
fig. 2 is a schematic connection diagram of the pressure type overflow valve of the invention.
In the attached drawing, 1 is a driving pump, 2 is a first heat exchanger, 3 is a second heat exchanger, 4 is a flow controller, 5 is an emergency bypass pipeline, and 6 is a pressure type overflow valve.
Detailed Description
In the invention, equipment with no specific connection mode is generally carried out according to conventional conditions or conditions suggested by manufacturers, and equipment with a specific model is generally conventional equipment in the chemical field.
Example one
Referring to fig. 1 and 2, the temperature control system for the exothermic reaction process includes a driving pump 1, a first heat exchanger 2, a second heat exchanger 3, and a flow controller 4. The first heat exchanger 2 is used for absorbing heat in the exothermic reaction process, and the second heat exchanger 3 is used for releasing heat to the outside. The cooling medium inlet of the first heat exchanger 2 is connected with the outlet of the driving pump 1 through a pipeline, the cooling medium outlet of the first heat exchanger 2 is connected with the cooled medium inlet of the second heat exchanger 3 through a pipeline, and the cooled medium outlet of the second heat exchanger 3 is connected with the inlet of the driving pump 1 through a pipeline, so that a closed circulation circuit is formed. The flow controller 4 is connected in series to the closed circulation line and used for adjusting the circulation flow of the closed circulation line, in this embodiment, the flow controller is a flow adjusting valve, an inlet of the flow controller 4 is connected to the cooling medium outlet of the first heat exchanger 2 through a pipeline, and an outlet of the flow controller 4 is connected to the cooled medium inlet of the second heat exchanger 3 through a pipeline. The emergency bypass pipeline is characterized by further comprising an emergency bypass pipeline 5, the upstream end of the emergency bypass pipeline 5 is connected with the inlet of the flow controller 4 in parallel, the downstream end of the emergency bypass pipeline 5 is connected with the outlet of the flow controller 4 in parallel, specifically, the upstream end of the emergency bypass pipeline 5 is connected between the cooling medium outlet of the first heat exchanger 2 and the inlet of the flow controller 4 in parallel, and the downstream end of the emergency bypass pipeline 5 is connected between the outlet of the flow controller 4 and the cooled medium inlet of the second heat exchanger 3 in parallel. The flow area of the emergency side-opening pipeline 5 is not more than 1/2 of the flow area of the flow controller 4 when the emergency side-opening pipeline is fully opened, the emergency side-opening pipeline can be a small-diameter pipeline, or a large-diameter pipeline is selected for the emergency side-opening pipeline, a flow limiting orifice plate is arranged in the large-diameter pipeline, the flow area of the flow limiting orifice plate is not more than 1/2 of the flow area of the flow controller 4, and the parameters of the small-diameter pipeline or the parameters of the flow limiting orifice plate in the large-diameter pipeline are mainly dependent on the flow of a normal working condition closed circulation. Of course, a pressure overflow valve 6 may be further included, an inlet of the pressure overflow valve 6 is connected in parallel with an inlet of the flow controller 4, and an outlet of the pressure overflow valve 6 is connected in parallel with an outlet of the flow controller 4. The parameters of the pressure type overflow valve mainly depend on the performance curve of the circulation driving pump and the flow of the closed circulation line under the normal working condition, and the passing flow of the pressure type overflow valve does not exceed the flow of the closed circulation line under the normal working condition generally.
Furthermore, in order to conveniently supplement the cooling medium into the closed circulation circuit, a cooling medium expansion tank is connected in series between the cooled medium outlet of the second heat exchanger 3 and the inlet of the driving pump 1.
Example two
Take the example of controlling the temperature of the nitric acid oxidation reaction process in the adipic acid production process. Referring to fig. 1, the first heat exchanger is placed in the oxidation reactor, cooling water is injected into the closed circulation line, the driving pump drives the cooling water to circulate in the closed circulation line, and the flow controller is electrically connected with the temperature sensor in the oxidation reactor, so that the purpose of automatically adjusting the flow is achieved. Nitric acid and alcohol ketone (or cyclohexanol) are used as raw materials and are put into an oxidation reactor, when the reaction is carried out, the temperature in the oxidation reactor rises, cooling water is heated at a first heat exchanger to take away heat in the oxidation reactor, the temperature in the oxidation reactor is kept stable, the heated cooling water is cooled at a second heat exchanger and is pumped back to the first heat exchanger through a driving pump to take away the heat in the oxidation reactor again, and the temperature in the oxidation reactor is kept stable continuously. When the flow controller is in a fully closed or nearly fully closed state due to faults (including the faults of the flow controller, or the faults of the controller controlling the flow controller, etc.) or manual misoperation, the medium in the closed circulation line keeps part of the medium to normally circulate through the emergency bypass pipeline. Through the production verification of the applicant, in the traditional temperature control system (without an emergency bypass pipeline), the temperature of the oxidation reactor reaches an alarm value after 30 seconds when the flow controller is in an unexpected fully-closed state, and reaches an interlocking shutdown value after 50 seconds, so that a shutdown accident is caused. According to the temperature control system, the temperature of the oxidation reactor reaches an alarm value after the temperature regulating valve is suddenly closed for 5 minutes, and reaches an interlocking stop value after 8 minutes. The abnormal buffer time of the latter is enough to enable an operator to take effective measures, and the production safety accidents caused by the stop of the oxidation interlocking or the failure of the interlocking are avoided.
Claims (8)
1. A temperature control system for an exothermic reaction process, comprising: comprises a driving pump (1), a first heat exchanger (2), a second heat exchanger (3) and a flow controller (4),
the first heat exchanger (2) is used for absorbing heat of an exothermic reaction process, the second heat exchanger (3) is used for releasing heat to the outside,
the cooling medium inlet of the first heat exchanger (2) is connected with the outlet of the driving pump (1) through a pipeline, the cooling medium outlet of the first heat exchanger (2) is connected with the cooled medium inlet of the second heat exchanger (3) through a pipeline, the cooled medium outlet of the second heat exchanger (3) is connected with the inlet of the driving pump (1) through a pipeline to form a closed circulation circuit,
the flow controller (4) is connected in series on the closed circulation line and is used for adjusting the circulation flow of the closed circulation line,
the emergency bypass pipeline is characterized by further comprising an emergency bypass pipeline (5) or a pressure type overflow valve (6), wherein the upstream end of the emergency bypass pipeline (5) is connected with the inlet of the flow controller (4) in parallel, the downstream end of the emergency bypass pipeline (5) is connected with the outlet of the flow controller (4) in parallel, the flow area of the emergency bypass pipeline (5) is 1/9-1/2 of the flow area of the flow controller (4), the inlet of the pressure type overflow valve (6) is connected with the inlet of the flow controller (4) in parallel, and the outlet of the pressure type overflow valve (6) is connected with the outlet of the flow controller (4) in parallel.
2. The system for controlling temperature of an exothermic reaction process according to claim 1, wherein: the first heat exchanger (2) is a coiled pipe, the upstream end of the coiled pipe is a cooling medium inlet, and the downstream end of the coiled pipe is a cooling medium outlet.
3. The system for controlling temperature of an exothermic reaction process according to claim 1, wherein: the second heat exchanger (3) is a plate heat exchanger and/or a tube heat exchanger.
4. The system for controlling temperature of an exothermic reaction process according to claim 1, wherein: the flow controller (4) is a flow regulating valve.
5. The system for controlling temperature of an exothermic reaction process according to claim 1, wherein: and a flow-limiting orifice plate is arranged in the emergency bypass pipeline (5), and the flow area of the flow-limiting orifice plate is 1/9-1/2 of the flow area of the flow controller (4).
6. The system for controlling temperature of an exothermic reaction process according to claim 1, wherein: a cooling medium expansion tank is connected in series between the cooled medium outlet of the second heat exchanger (3) and the inlet of the driving pump (1).
7. The system for controlling temperature of an exothermic reaction process according to claim 1, wherein: the inlet of the flow controller (4) is connected with the cooling medium outlet of the first heat exchanger (2) through a pipeline, and the outlet of the flow controller (4) is connected with the cooled medium inlet of the second heat exchanger (3) through a pipeline.
8. The system for controlling temperature of an exothermic reaction process according to claim 7, wherein: the upstream end of the emergency bypass pipeline (5) is connected in parallel between the cooling medium outlet of the first heat exchanger (2) and the inlet of the flow controller (4), and the downstream end of the emergency bypass pipeline (5) is connected in parallel between the outlet of the flow controller (4) and the cooled medium inlet of the second heat exchanger (3).
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| CN110118106A (en) * | 2019-04-18 | 2019-08-13 | 华电电力科学研究院有限公司 | A kind of distributed top pressure power generation system and working method based on efficient radial turbines |
| CN211487636U (en) * | 2019-10-21 | 2020-09-15 | 重庆华峰化工有限公司 | Temperature control system for exothermic reaction process |
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