CN209872345U - Hydrogen production low-temperature heat recycling system - Google Patents
Hydrogen production low-temperature heat recycling system Download PDFInfo
- Publication number
- CN209872345U CN209872345U CN201920632519.XU CN201920632519U CN209872345U CN 209872345 U CN209872345 U CN 209872345U CN 201920632519 U CN201920632519 U CN 201920632519U CN 209872345 U CN209872345 U CN 209872345U
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- China
- Prior art keywords
- heat exchanger
- fluid passageway
- pipeline
- fluid channel
- hydrogen production
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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
-
- 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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- Hydrogen, Water And Hydrids (AREA)
Abstract
The utility model discloses a hydrogen production low temperature heat recovery system of recycling, including the heat exchanger, the well gas of hydrogen plant comes one end of pipe connection first heat exchanger first fluid passageway, and the second fluid passageway of first heat exchanger connects the demineralized water pipeline, and the first fluid passageway of first heat exchanger first fluid passageway other end is connected to well gas diversion jar through second heat exchanger first fluid passageway and third heat exchanger first fluid passageway, and second heat exchanger second fluid passageway connects hydrogen production feed gas pipeline, and third heat exchanger second fluid passageway connects the fuel gas pipeline; and a regulating valve is connected between the pipelines at two sides of the first fluid channel of the second heat exchanger. The utility model discloses add the heat exchanger and utilize hydrogen manufacturing feed gas pipeline and reborner fuel gas pipeline to retrieve low temperature heat jointly respectively on well gas demineralized water preheater shell side outlet pipeline, utilize this part low temperature heat to heat up for hydrogen manufacturing feed gas and fuel gas, practiced thrift in a large number for the middling pressure steam that the feed gas heaied up, improved the reborner thermal efficiency again.
Description
Technical Field
The utility model relates to a chemical industry equipment technical field, concretely relates to system hydrogen low temperature heat recovery system of recycling.
Background
Along with the upgrading of the quality of gasoline and diesel oil products, hydrogen production devices of various refineries operate under high load, the problem of insufficient cooling of the medium-temperature gas in the hydrogen production devices of 2 ten thousand Nm3/h in the petrochemical industry is increasingly highlighted, the hydrogen production capacity of the hydrogen production devices is severely limited, meanwhile, a large amount of low-temperature heat waste of the medium-temperature gas is also caused, a large amount of heat cannot be recycled, and the hydrogen production cost is increased.
The medium-temperature gas contains a large amount of steam, the vaporization potential heat value of the water and the specific heat capacity of the water are high, the low-temperature heat recovery in the medium-temperature gas has great economic value, and the medium-pressure steam for heating the raw material gas for hydrogen production and the fuel gas can be greatly saved and the heat efficiency of the reformer can be improved by utilizing the low-temperature heat to heat the raw material gas for hydrogen production and the fuel gas.
Disclosure of Invention
The utility model aims at providing a system for recycling hydrogen production low-temperature heat aiming at the defects in the prior art.
The technical scheme is as follows: the hydrogen production low-temperature heat recovery and reuse system comprises a heat exchanger, wherein a pipeline from intermediate-temperature gas in a hydrogen production device is connected with one end of a first fluid channel of a first heat exchanger, a second fluid channel of the first heat exchanger is connected with a demineralized water pipeline, the other end of the first fluid channel of the first heat exchanger is connected to an intermediate-temperature gas diversion tank through a first fluid channel of a second heat exchanger and a first fluid channel of a third heat exchanger, the second fluid channel of the second heat exchanger is connected with a hydrogen production raw gas pipeline, and the second fluid channel of the third heat exchanger is connected with a fuel gas pipeline; and a regulating valve is connected between the pipelines at two sides of the first fluid channel of the second heat exchanger.
The regulating valve is a temperature control regulating valve, and a sensor of the regulating valve is arranged on a left pipeline of the first fluid channel of the third heat exchanger.
Compared with the prior art, the utility model, have following advantage: reasonable in design, simple structure, transformation are easy, add second heat exchanger and third heat exchanger on well gas demineralized water preheater shell side outlet line and utilize hydrogen manufacturing feed gas pipeline and reborner fuel gas pipeline to retrieve the low temperature heat of well gas middle pipeline jointly respectively, have increased the secondary line of second heat exchanger tube side temperature control simultaneously, have the governing valve on the secondary line, the temperature control of well gas is realized to accessible governing valve 9. The low-temperature heat is utilized to heat the hydrogen production raw gas and the fuel gas, so that a large amount of medium-pressure steam for heating the raw gas is saved, and the heat efficiency of the reformer is improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
Referring to fig. 1, a hydrogen production low-temperature heat recovery and reuse system comprises a heat exchanger, wherein a pipeline 4 from medium-temperature gas in a hydrogen production device is connected with one end of a first fluid channel of a first heat exchanger 1, a second fluid channel of the first heat exchanger 1 is connected with a demineralized water pipeline 5, the other end of the first fluid channel of the first heat exchanger 1 is connected with a medium-temperature gas diversion tank 6 through a first fluid channel of a second heat exchanger 2 and a first fluid channel of a third heat exchanger 3, a second fluid channel of the second heat exchanger 2 is connected with a hydrogen production raw gas pipeline 7, and a second fluid channel of the third heat exchanger 3 is connected with a reformer fuel gas pipeline 8; and a regulating valve 9 is connected between the pipelines at two sides of the first fluid channel of the second heat exchanger 2. The regulating valve 9 is a temperature control regulating valve, and a sensor of the regulating valve is arranged on a left pipeline of a first fluid channel of the third heat exchanger 3.
A second heat exchanger 2 and a third heat exchanger 3 are additionally arranged on a shell pass outlet pipeline of a medium-pressure gas-changing desalted water preheater-first heat exchanger 1, low-temperature heat of a medium-pressure gas-changing pipeline 4 is recovered by a hydrogen-production raw gas pipeline 7 and a reformer fuel gas pipeline 8 together, a pipe pass temperature control secondary line of the second heat exchanger 2 is additionally arranged, and the secondary line is provided with an adjusting valve 9, so that medium-pressure gas-changing temperature control can be realized through the adjusting valve 9.
Use the utility model discloses the effect of back well gas low temperature heat recovery system is as table 1:
TABLE 1 comparison of the results before and after low temperature heat recovery
| Item | Before transformation | After transformation |
| Hydrogen production and hydrogen yield | 18500Nm³/h | 20000Nm³/h |
| Before-air-cooling temperature of medium-variable air inlet | 170℃ | 80℃ |
| PSA Hydrogen yield | 85% | 90.1% |
| Cost of hydrogen production | Height of | Is low in |
| Heat efficiency of reformer | 89% | 91% |
| Heating medium pressure steam with raw gas | 11t steam/ton hydrogen | 10 t steam/ton hydrogen |
1. As can be seen from Table 1, the hydrogen production apparatus can be obtained by performing the ethanol production 12000000Nm year by 8000 h/year.
2. 13000 tons of medium-pressure steam can be saved by producing 13000 tons of hydrogen per year after the transformation, and 260 ten thousand yuan per year by calculating 200 yuan per ton of steam.
3. It can be seen from table 1 that the overall hydrogen production cost is greatly reduced compared to the previous one.
Claims (2)
1. The hydrogen production low-temperature heat recovery and reuse system comprises a heat exchanger, wherein a pipeline from medium-temperature gas in a hydrogen production device is connected with one end of a first fluid channel of a first heat exchanger, a second fluid channel of the first heat exchanger is connected with a demineralized water pipeline, and the system is characterized in that: the other end of the first fluid channel of the first heat exchanger is connected to a medium-pressure gas-distributing water tank through a first fluid channel of a second heat exchanger and a first fluid channel of a third heat exchanger, a second fluid channel of the second heat exchanger is connected with a hydrogen-making raw gas pipeline, and a second fluid channel of the third heat exchanger is connected with a fuel gas pipeline; and a regulating valve is connected between the pipelines at two sides of the first fluid channel of the second heat exchanger.
2. The hydrogen production low-temperature heat recovery and reuse system according to claim 1, characterized in that: the regulating valve is a temperature control regulating valve, and a sensor of the regulating valve is arranged on a left pipeline of a first fluid channel of the third heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920632519.XU CN209872345U (en) | 2019-05-06 | 2019-05-06 | Hydrogen production low-temperature heat recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920632519.XU CN209872345U (en) | 2019-05-06 | 2019-05-06 | Hydrogen production low-temperature heat recycling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209872345U true CN209872345U (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920632519.XU Expired - Fee Related CN209872345U (en) | 2019-05-06 | 2019-05-06 | Hydrogen production low-temperature heat recycling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209872345U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111288298A (en) * | 2020-03-09 | 2020-06-16 | 李明 | Method for recovering natural gas discharged by hydrogen production device through desulfurization, temperature rise and emptying |
-
2019
- 2019-05-06 CN CN201920632519.XU patent/CN209872345U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111288298A (en) * | 2020-03-09 | 2020-06-16 | 李明 | Method for recovering natural gas discharged by hydrogen production device through desulfurization, temperature rise and emptying |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191231 |