CN112229235B - A condensate recovery device and control method thereof - Google Patents
A condensate recovery device and control method thereof Download PDFInfo
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- CN112229235B CN112229235B CN202011102176.XA CN202011102176A CN112229235B CN 112229235 B CN112229235 B CN 112229235B CN 202011102176 A CN202011102176 A CN 202011102176A CN 112229235 B CN112229235 B CN 112229235B
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- condensate
- circulating water
- pipeline
- tank
- water cooler
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- 238000011084 recovery Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 99
- 239000007788 liquid Substances 0.000 claims description 39
- 230000001105 regulatory effect Effects 0.000 claims description 29
- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 claims description 3
- 101000800055 Homo sapiens Testican-1 Proteins 0.000 description 4
- 102100033390 Testican-1 Human genes 0.000 description 4
- 102100037068 Cytoplasmic dynein 1 light intermediate chain 1 Human genes 0.000 description 3
- 101000954692 Homo sapiens Cytoplasmic dynein 1 light intermediate chain 1 Proteins 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000012824 chemical production Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/10—Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a condensate recovery device and a control method thereof, wherein the condensate recovery device comprises a condensate tank, a first circulating water cooler and a second circulating water cooler which are used for heat exchange of condensate are respectively connected at a top interface of the condensate tank through pipelines, the side end of the lower part of the condensate tank is connected with a condensate pump inlet through a pipeline, and a condensate pump outlet is connected into a condensate pipe network through a pipeline. The invention can reduce the temperature of condensate and effectively prevent the phenomenon of 'water hammer'.
Description
Technical Field
The invention relates to the field of chemical production, in particular to a condensate recovery device and a control method thereof.
Background
Since vapor phase to liquid phase releases a large amount of latent heat, it is common to use vapor as a heating medium to heat materials to a specified temperature during chemical production. The traditional steam becomes condensate after heat exchange, the condensate is directly combined with a condensate pipe network, but a plurality of strands of condensate with different pressure levels are often used in the large-scale chemical production process, the condensate has different temperatures, a part of condensate has a small amount of steam due to steam traps, the phenomenon of 'water hammer' is often generated in the condensate pipe network, the production safety is seriously endangered, the condensate is often required to be discharged, the waste is serious, the field environment is poor, the cost of sewage treatment is increased, and the operation cost is high.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a condensate recovery device and a control method thereof, which can reduce the temperature of condensate and effectively prevent the phenomenon of 'water hammer'.
The aim of the invention can be achieved by the following technical scheme.
The condensate recovery device comprises a condensate tank, wherein a first circulating water cooler and a second circulating water cooler for condensate heat exchange are respectively connected to the joint of the top of the condensate tank through pipelines, the side end of the lower part of the condensate tank is connected with a condensate pump inlet through a pipeline, and a condensate pump outlet is connected into a condensate pipe network through a pipeline.
The shell side inlet of the first circulating water cooler is connected with the circulating water pipeline through a pipeline, and the shell side outlet of the first circulating water cooler is connected with the circulating water return pipeline.
The pipeline connected with the shell side inlet of the first circulating water cooler is provided with a first circulating water regulating valve, and the pipeline between the tube side outlet of the first circulating water cooler and the top interface of the condensate tank is provided with an online high-pressure condensate thermometer which automatically controls the first circulating water regulating valve.
The tube side inlet of the second circulating water cooler is connected with a low-pressure condensate pipeline through a pipeline, the tube side outlet of the second circulating water cooler is connected to the joint at the top of the condensate tank through a pipeline and extends below the liquid level in the condensate tank, the shell side inlet of the second circulating water cooler is connected with a circulating water pipeline through a pipeline, and the shell side outlet of the second circulating water cooler is connected with a circulating water return pipeline.
And a pipeline connected with the inlet of the second circulating water cooler shell side is provided with a second circulating water regulating valve, and a pipeline between the outlet of the second circulating water cooler shell side and the top interface of the condensate tank is provided with an online low-pressure condensate thermometer which automatically controls the second circulating water regulating valve.
The top of the condensate tank is provided with a blow-down pipe, and the side end of the lower part of the condensate tank is provided with a condensate drain valve.
And a condensate liquid level regulating valve and an online conductivity monitoring meter are installed on the condensate liquid pump outlet pipeline, and an online liquid level meter is installed on the side wall of the condensate liquid tank and is used for automatically controlling the condensate liquid level regulating valve.
And a standby condensate pump is connected between the inlet and the outlet of the condensate pump through a pipeline.
The aim of the invention can be achieved by the following technical scheme.
A control method of a condensate recovery apparatus, comprising the steps of:
The high-pressure condensate is merged into a high-pressure condensate pipeline, and the low-pressure condensate is merged into a low-pressure condensate pipeline;
The low-pressure condensate exchanges heat through a second circulating water cooler, and the condensate after heat exchange is monitored through an online low-pressure condensate thermometer, and the circulating water flow rate is controlled through a second circulating water regulating valve so as to control the condensate temperature;
The condensate after heat exchange is discharged into a condensate tank, the condensate in the condensate tank is pressurized by a condensate pump and then is merged into a condensate pipe network, the liquid level in the condensate tank is monitored by an online liquid level meter, and the liquid level in the condensate tank is automatically controlled by a condensate liquid level regulating valve;
In addition, the online conductivity monitoring meter is used for monitoring the condensate water quality, if the value of the online conductivity monitoring meter exceeds the standard, the condensate water quality is proved to be out of standard, maintenance is needed, and the condensate water is reused after the reason is found out.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) According to the invention, the condensate is cooled by the circulating water cooler, and part of steam in the condensate is totally condensed, so that the phenomenon of water hammer is effectively prevented, the production safety is ensured, and the sewage treatment cost is reduced.
(2) The invention designs a high-pressure condensate pipeline and a low-pressure condensate pipeline, so that the problem that low-pressure condensate cannot smoothly flow into a condensate tank due to simultaneous combination of high-pressure condensate and low-pressure condensate is prevented, and the production stability is ensured.
(3) According to the invention, the condensate thermometer automatically controls the circulating waterway to increase the regulating valve after heat exchange, so that the condensate temperature is ensured, the use amount of circulating water is reduced, and the running cost is reduced.
Drawings
FIG. 1 is a schematic process flow diagram of the condensate recovery apparatus of the present invention.
The reference numerals are a V1 condensate drain valve, a TV1 first circulating water regulating valve, a TV2 second circulating water regulating valve, a LV1 condensate liquid level regulating valve, an S01 condensate liquid tank, an E01 first circulating water cooler, an E02 second circulating water cooler, an AI1 online conductivity monitoring table, an LIC1 online liquid level meter, a TIC1 online high-pressure condensate temperature meter, a TIC2 online low-pressure condensate temperature meter and a P1 condensate pump.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the condensate recovery device comprises a condensate tank S01, wherein a top interface of the condensate tank S01 is respectively connected with a first circulating water cooler E01 and a second circulating water cooler E02 for condensate heat exchange through pipelines, a lower side end of the condensate tank S01 is connected with an inlet of a condensate pump P1 through a pipeline, and an outlet of the condensate pump P1 is connected into a condensate pipe network through a pipeline.
The inlet of the tube side of the first circulating water cooler E01 is connected with a high-pressure condensate pipeline through a pipeline, the outlet of the tube side of the first circulating water cooler E01 is connected to the joint of the top of the condensate tank S01 through a pipeline and extends below the liquid level in the condensate tank S01, the inlet of the shell side of the first circulating water cooler E01 is connected with a circulating water pipeline through a pipeline, and the outlet of the shell side of the first circulating water cooler E01 is connected with a circulating water return pipeline. The pipeline connected with the shell side inlet of the first circulating water cooler E01 is provided with a first circulating water regulating valve TV1, and the pipeline between the tube side outlet of the first circulating water cooler E01 and the top interface of the condensate tank S01 is provided with an online high-pressure condensate thermometer TIC1, and the online high-pressure condensate thermometer TIC1 automatically controls the first circulating water regulating valve TV1.
The inlet of the tube side of the second circulating water cooler E02 is connected with a low-pressure condensate pipeline through a pipeline, the outlet of the tube side of the second circulating water cooler E02 is connected to the joint of the top of the condensate tank S01 through a pipeline and extends below the liquid level in the condensate tank S01, the inlet of the shell side of the second circulating water cooler E02 is connected with a circulating water pipeline through a pipeline, and the outlet of the shell side of the second circulating water cooler E02 is connected with a circulating water return pipeline. The pipeline connected with the shell side inlet of the second circulating water cooler E02 is provided with a second circulating water regulating valve TV2, and the pipeline between the tube side outlet of the second circulating water cooler E02 and the top interface of the condensate tank S01 is provided with an online low-pressure condensate thermometer TIC2, and the online low-pressure condensate thermometer TIC2 automatically controls the second circulating water regulating valve TV2.
The top of the condensate tank S01 is provided with a blow-down pipe, and the side end of the lower part of the condensate tank S01 is provided with a condensate drain valve V1. The condensate pump P1 is provided with a condensate liquid level regulating valve LV1 and an online conductivity monitoring table AI1 on an outlet pipeline, and an online liquid level meter LIC1 is arranged on the side wall of the condensate tank S01, and the condensate liquid level regulating valve LV1 is automatically controlled by the online liquid level meter LIC 1. And a standby condensate pump is connected between the inlet and the outlet of the condensate pump P1 through pipelines, and the standby condensate pump is started and stopped.
The control method of the condensate recovery device comprises the following steps:
The steam condensate from each reboiler of the device is high-pressure condensate, the high-pressure condensate is merged into a high-pressure condensate pipeline, the steam seal condensate from a heat tracing station of the device, a steam turbine and the like is low-pressure condensate, and the low-pressure condensate is merged into a low-pressure condensate pipeline.
The high-pressure condensate exchanges heat through a first circulating water cooler E01, the condensate after heat exchange is monitored through an online high-pressure condensate thermometer TIC1, circulating water flow is controlled through a first circulating water regulating valve TV1 so as to control condensate temperature, and similarly, the low-pressure condensate exchanges heat through a second circulating water cooler E02, the condensate after heat exchange is monitored through an online low-pressure condensate thermometer TIC2, and circulating water flow is controlled through a second circulating water regulating valve TV2 so as to control condensate temperature.
The condensate after heat exchange is discharged into the condensate tank S01, and the high-pressure condensate pipeline and the low-pressure condensate pipeline are required to extend below the liquid level of the condensate tank S01 and are used for absorbing a small amount of residual steam in the two condensate pipelines, so that the steam can be prevented from being discharged to the atmosphere through the discharging pipeline, and the influence on the surrounding environment is further adverse. The condensate in the condensate tank S01 is pressurized by the condensate pump P1 and then is merged into a condensate pipe network, the liquid level in the condensate tank S01 is monitored by an on-line liquid level meter LIC1, and the liquid level in the condensate tank S01 is automatically controlled by a condensate liquid level regulating valve LV 1. And an online conductivity monitoring table AI1 is arranged at the outlet of the condensate pump P1 and is used for monitoring the condensate water quality, if the value of the online conductivity monitoring table AI1 exceeds the standard, the condensate water quality is proved to be out of standard, maintenance is needed, and the condensate water is reused after the reason is found out.
The implementation process and the economic effect of the invention are as follows:
The project was proposed at the end of 2011, for on-site investigation and design. Part of pipelines, condensate tanks, heat exchangers, condensate pumps and other devices are newly added, construction is started in the second half of 2012, and all the pipelines and the condensate tanks, heat exchangers, condensate pumps and other devices are integrated into the system in the year 4 of 2013. After the steam condensate recovery project is put into operation, the steam condensate in the device area is completely recovered, and the field environment is greatly improved.
The condensate liquid is discharged from the synthesis ammonia and methanol acid in situ according to 21 ton/hour and 18 ton/hour respectively, the condensate liquid price is calculated according to 7.08 yuan/ton, the electricity price is calculated according to 0.583 yuan/degree, the power of a condensate liquid pump is 15KW, the circulating water flow is 200m 3/h, and the circulating water is 0.298 yuan/ton. Annual run time is given at 8000 hours of design, the annual recoverable condensate benefits are:
(21+18) 8000.08-15.2.8000.0.583-200.2.8000.0.298= 111.544 ten thousand yuan/year.
Although the function and operation of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to the above-described specific functions and operations, but the above-described specific embodiments are merely illustrative, not restrictive, and many forms can be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the appended claims, which are included in the protection of the present invention.
Claims (6)
1. The condensate recovery device is characterized by comprising a condensate tank (S01), wherein a first circulating water cooler (E01) and a second circulating water cooler (E02) for condensate heat exchange are respectively connected at the top interface of the condensate tank (S01) through pipelines, the side end of the lower part of the condensate tank (S01) is connected with the inlet of a condensate pump (P1) through a pipeline, and the outlet of the condensate pump (P1) is connected into a condensate pipe network through a pipeline;
The system comprises a first circulating water cooler (E01), a first circulating water regulating valve (TV 1) and an online high-pressure condensate thermometer (TIC 1), wherein a tube side inlet of the first circulating water cooler (E01) is connected with a high-pressure condensate pipeline through a pipeline, a tube side outlet of the first circulating water cooler (E01) is connected to a top interface of a condensate tank (S01) through a pipeline and extends to below the liquid level in the condensate tank (S01), a shell side inlet of the first circulating water cooler (E01) is connected with a circulating water return pipeline through a pipeline, a first circulating water regulating valve (TV 1) is arranged on the pipeline connected with the shell side inlet of the first circulating water cooler (E01), and the online high-pressure condensate thermometer (TIC 1) is arranged on the pipeline between the tube side outlet of the first circulating water cooler (E01) and the top interface of the condensate tank (S01) and automatically controls the first circulating water valve (TV 1);
The inlet of the tube side of the second circulating water cooler (E02) is connected with a low-pressure condensate pipeline through a pipeline, the outlet of the tube side of the second circulating water cooler (E02) is connected to the top interface of the condensate tank (S01) through a pipeline and extends to below the liquid level in the condensate tank (S01), the inlet of the shell side of the second circulating water cooler (E02) is connected with a circulating water pipeline through a pipeline, and the outlet of the shell side of the second circulating water cooler (E02) is connected with a circulating water return pipeline.
2. The condensate recovery apparatus according to claim 1, wherein a second circulating water regulating valve (TV 2) is installed on a pipeline connected to the shell side inlet of the second circulating water cooler (E02), and an on-line low pressure condensate thermometer (TIC 2) is installed on a pipeline between the tube side outlet of the second circulating water cooler (E02) and the top port of the condensate tank (S01), and the on-line low pressure condensate thermometer (TIC 2) automatically controls the second circulating water regulating valve (TV 2).
3. The condensate recovery apparatus according to claim 1, wherein a blow-down pipe is installed at the top of the condensate tank (S01), and a condensate drain valve (V1) is installed at the lower side end of the condensate tank (S01).
4. Condensate recovery apparatus according to claim 1, wherein a condensate liquid level regulating valve (LV 1) and an on-line conductivity monitoring meter (AI 1) are installed on the condensate liquid pump (P1) outlet line, an on-line liquid level meter (LIC 1) is installed on the side wall of the condensate liquid tank (S01), and the on-line liquid level meter (LIC 1) automatically controls the condensate liquid level regulating valve (LV 1).
5. Condensate recovery apparatus according to claim 1, characterized in that a backup condensate pump is connected between the inlet and the outlet of the condensate pump (P1) via a line.
6. A control method of the condensate recovery apparatus according to any one of claims 1 to 5, comprising the steps of:
The high-pressure condensate is merged into a high-pressure condensate pipeline, and the low-pressure condensate is merged into a low-pressure condensate pipeline;
The high-pressure condensate exchanges heat through a first circulating water cooler (E01), the condensate after heat exchange is monitored through an online high-pressure condensate thermometer (TIC 1), and the circulating water flow is controlled through a first circulating water regulating valve (TV 1) so as to control the condensate temperature;
The condensate after heat exchange is discharged into a condensate tank (S01), condensate in the condensate tank (S01) is pressurized by a condensate pump (P1) and then is merged into a condensate pipe network, the liquid level in the condensate tank (S01) is monitored by an online liquid level meter (LIC 1), and the liquid level in the condensate tank is automatically controlled by a condensate liquid level regulating valve (LV 1);
In addition, the online conductivity monitoring table (AI 1) is utilized to monitor the condensate water quality, if the value of the online conductivity monitoring table (AI 1) exceeds the standard, the condensate water quality is proved to be out of standard, maintenance is needed, and the condensate water is reused after the reason is found out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011102176.XA CN112229235B (en) | 2020-10-15 | 2020-10-15 | A condensate recovery device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011102176.XA CN112229235B (en) | 2020-10-15 | 2020-10-15 | A condensate recovery device and control method thereof |
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| CN112229235A CN112229235A (en) | 2021-01-15 |
| CN112229235B true CN112229235B (en) | 2025-04-01 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686525A (en) * | 2019-11-06 | 2020-01-14 | 河南省中原大化集团有限责任公司 | Steam condensate gas recovery device and recovery method |
| CN214095612U (en) * | 2020-10-15 | 2021-08-31 | 天津渤化永利化工股份有限公司 | Condensate recovery device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3725221B2 (en) * | 1995-10-13 | 2005-12-07 | 株式会社テイエルブイ | Condensate recovery device |
| CN207113638U (en) * | 2017-07-13 | 2018-03-16 | 新能凤凰（滕州）能源有限公司 | Steam condensate recovery system |
| CN108253406A (en) * | 2018-03-06 | 2018-07-06 | 中国石油大学(华东) | Enclosed condensation water recovery system |
| CN211552525U (en) * | 2019-12-27 | 2020-09-22 | 南京合创工程设计有限公司 | Complete equipment for recovering low-low pressure steam condensate waste heat for hot water preparation |
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- 2020-10-15 CN CN202011102176.XA patent/CN112229235B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686525A (en) * | 2019-11-06 | 2020-01-14 | 河南省中原大化集团有限责任公司 | Steam condensate gas recovery device and recovery method |
| CN214095612U (en) * | 2020-10-15 | 2021-08-31 | 天津渤化永利化工股份有限公司 | Condensate recovery device |
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