Gas-liquid separation system additionally provided with alkali liquor buffer tank
By adding an alkali buffer tank to the electrolytic hydrogen production system, the washed alkali liquid and supplementary water are directly recycled to the electrolytic tank, the problem of high height in the existing system is solved, and the effect of space reduction and cost reduction is achieved.
Patent Information
- Application Number
- CN202421211591.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-29
AI Technical Summary
In the existing electrolytic hydrogen production system, the gas-liquid separation system is designed with high height, resulting in high equipment costs, troublesome maintenance, and large height of the factory building. It also requires high-altitude oxygen scrubbers and hydrogen scrubbers to achieve overflow of alkali and water. Supplement.
Add an alkali buffer tank. The alkali liquid washed by the alkali liquid will directly enter the buffer tank and then be cooled and then circulated to the electrolytic tank. The replenishment water will also pass through the washing tower and enter the buffer tank directly. The liquid in the alkali buffer tank will be replenished by the circulation pump. water reduces the height of the scrubber.
It effectively reduces the space and design size, reduces equipment costs, simplifies maintenance and maintenance, reduces pipe length, and has good economic benefits.
Smart Images
Figure CN222313336U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a gas-liquid separation system with an additional alkali solution buffer tank, belonging to the technical field of electrolytic hydrogen production systems. Background Art
[0002] Hydrogen, oxygen and alkali liquid are produced in the electrolytic cell. After being separated by the oxygen-liquid separator / hydrogen-liquid separator, most of the alkali liquid remains in the oxygen-liquid separator / hydrogen-liquid separator. The alkali liquid remaining in the oxygen-liquid separator / hydrogen-liquid separator is cooled by the alkali liquid cooler and then enters the electrolytic cell. The remaining alkali liquid carries gas and is then washed by the oxygen scrubber / hydrogen scrubber. The washed alkali liquid overflows into the oxygen liquid separator / hydrogen gas-liquid separator. The alkali liquid in the oxygen liquid separator / hydrogen gas-liquid separator is then cooled by the alkali liquid cooler and continues to circulate electrolysis in the electrolyzer. Therefore, the oxygen scrubber / hydrogen scrubber needs to be designed to be higher than the oxygen liquid separator / hydrogen gas-liquid separator to achieve the effect of overflowing alkali liquid, resulting in a very high design height of the gas-liquid separation system, reaching 6-7m. At the same time, the water consumed in the electrolyzer needs to be supplemented with raw water (i.e., deionized water) through the oxygen scrubber / hydrogen scrubber, and then through the oxygen liquid separator / hydrogen gas-liquid separator to the electrolyzer. The height of the oxygen scrubber / hydrogen scrubber also needs to be higher than the oxygen liquid separator / hydrogen gas-liquid separator. As a result, the overall height of the system is very high, maintenance is troublesome, and the equipment cost is high, the plant height is large, and the investment is high. Utility Model Content
[0003] In order to solve the above problems, the utility model discloses a gas-liquid separation system with an additional alkali liquid buffer tank, and its specific technical solution is as follows:
[0004] A gas-liquid separation system with an additional alkali liquid buffer tank comprises an electrolyzer, an oxygen-liquid separator, a hydrogen-gas-liquid separator, an oxygen scrubber, a hydrogen scrubber, an oxygen-side water separator, a hydrogen-side water separator, an alkali liquid cooler and an alkali liquid circulation pump, and also comprises an alkali liquid buffer tank, wherein a water inlet end of the alkali liquid buffer tank is respectively connected to water outlet ends of the oxygen-liquid separator, the hydrogen-gas-liquid separator, the oxygen scrubber and the hydrogen scrubber, a water outlet end of the alkali liquid buffer tank is connected to a water inlet end of the alkali liquid cooler, a water outlet end of the alkali liquid cooler is connected to a water inlet end of the electrolyzer through an alkali liquid circulation pump, a gas outlet end of the electrolyzer is connected to gas inlets of the oxygen-liquid separator and the hydrogen-gas-liquid separator, a gas outlet end of the oxygen-liquid separator is connected to a gas inlet end of the oxygen scrubber, and a gas outlet end of the hydrogen-gas-liquid separator is connected to a gas inlet end of the hydrogen scrubber.
[0005] Furthermore, water is electrolyzed in the electrolytic cell to produce oxygen and hydrogen, and the oxygen / hydrogen is entrained with alkali solution and transported from the gas outlet of the electrolytic cell to the gas inlet of the oxygen-liquid separator / hydrogen-gas-liquid separator through a pipeline, and the alkali solution separated by the oxygen-liquid separator / hydrogen-gas-liquid separator is transported from the water outlet to the water inlet of the alkali solution buffer tank through a pipeline.
[0006] Furthermore, the oxygen / hydrogen after separation treatment by the oxygen-liquid separator / hydrogen-liquid separator still contains alkali liquid, and the oxygen / hydrogen coming out from the gas outlet of the oxygen-liquid separator / hydrogen-liquid separator is transported to the gas inlet of the oxygen washing tower / hydrogen washing tower through a pipeline. After the oxygen / hydrogen is washed in the oxygen washing tower / hydrogen washing tower, the washed alkali liquid is transported from the water outlet of the oxygen washing tower / hydrogen washing tower to the water inlet of the alkali liquid buffer tank through a pipeline.
[0007] Furthermore, it also includes an oxygen cooler and a hydrogen cooler. The oxygen / hydrogen passed through the oxygen washing tower / hydrogen washing tower is transported from the gas outlet end to the oxygen cooler / hydrogen cooler, and the oxygen / hydrogen coming out of the oxygen cooler / hydrogen cooler is transported to the oxygen side water separator / hydrogen side water separator.
[0008] Furthermore, the oxygen-side water separator is provided with an oxygen venting port, and the oxygen separated by the oxygen-side water separator is vented from the oxygen venting port of the oxygen-side water separator, and the water or alkali solution separated by the oxygen-side water separator is transported from its water outlet to the water inlet of the oxygen-liquid separator;
[0009] The hydrogen side water separator is provided with an unqualified hydrogen venting port. After separation by the hydrogen side water separator, qualified hydrogen enters the hydrogen purification system, and unqualified hydrogen is discharged from the unqualified hydrogen venting port. The water or alkali liquid separated by the hydrogen side water separator is transported from its water outlet end to the water inlet end of the oxygen liquid separator.
[0010] Furthermore, the oxygen scrubbing tower / hydrogen scrubbing tower also receives added raw water, and the raw water is transported to the water inlet of the alkali solution buffer tank through a pipeline through the water outlet of the oxygen scrubbing tower / hydrogen scrubbing tower.
[0011] Furthermore, the height of the alkali solution buffer tank is lower than the heights of the oxygen-liquid separator, the hydrogen-liquid separator, the oxygen scrubbing tower and the hydrogen scrubbing tower.
[0012] The beneficial effects of the utility model are:
[0013] The utility model adds an alkali liquid buffer tank, and the alkali liquid washed out by the oxygen washing tower / hydrogen washing tower directly enters the alkali liquid buffer tank, and the alkali liquid in the alkali liquid buffer tank directly enters the alkali liquid cooler for cooling and then enters the electrolytic cell for circulation electrolysis. At the same time, the supplemented raw water (i.e., deionized water) directly enters the alkali liquid buffer tank after passing through the oxygen washing tower / hydrogen washing tower, and the alkali liquid in the alkali liquid buffer tank directly enters the alkali liquid cooler, and then is transported to the electrolytic cell for water replenishment through the alkali liquid circulation pump. At the same time, the alkali liquid in the oxygen liquid separator / hydrogen gas liquid separator also enters the alkali liquid cooler for cooling after passing through the alkali liquid buffer tank and then enters the electrolytic cell. It can ensure that the height of the oxygen washing tower / hydrogen washing tower is lower than the original design height, only 4-5m is needed, which greatly reduces the space, reduces the design size and manufacturing cost of the plant and system, facilitates maintenance, reduces the length of the maintenance and maintenance pipelines, and has good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a connection diagram of the utility model. DETAILED DESCRIPTION
[0015] The present invention is further described below in conjunction with the accompanying drawings and specific implementations. It should be understood that the following specific implementations are only used to illustrate the present invention and are not used to limit the scope of the present invention.
[0016] Combined with Figure 1 It can be seen that the connection relationship of the gas-liquid separation system of the additional alkali liquid buffer tank is as follows: the water inlet end of the alkali liquid buffer tank is connected to the water outlet ends of the oxygen-liquid separator, the hydrogen-gas-liquid separator, the oxygen washing tower and the hydrogen washing tower respectively, the water outlet end of the alkali liquid buffer tank is connected to the water inlet end of the alkali liquid cooler, the water outlet end of the alkali liquid cooler is connected to the water inlet end of the electrolyzer through the alkali liquid circulation pump, the gas outlet end of the electrolyzer is connected to the oxygen-liquid separator and the hydrogen-gas-liquid separator, the gas outlet end of the oxygen-liquid separator is connected to the gas inlet end of the oxygen washing tower, and the gas outlet end of the hydrogen-gas-liquid separator is connected to the gas inlet end of the hydrogen washing tower.
[0017] The working process of the utility model is as follows: water is electrolyzed in the electrolytic cell to generate oxygen and hydrogen, and the oxygen / hydrogen carries alkali solution and enters the oxygen-liquid separator / hydrogen-liquid separator respectively, and the alkali solution separated by the oxygen-liquid separator / hydrogen-liquid separator is transported to the alkali solution buffer tank. The oxygen / hydrogen separated by the oxygen-liquid separator / hydrogen-liquid separator still carries alkali solution, and the oxygen / hydrogen is transported to the oxygen washing tower / hydrogen washing tower, and the alkali solution washed out by the oxygen washing tower / hydrogen washing tower is transported to the alkali solution buffer tank. The oxygen / hydrogen washed by the oxygen washing tower / hydrogen washing tower enters the oxygen cooler / hydrogen cooler, and the oxygen cooled by the oxygen cooler enters the oxygen-side water separator, and the oxygen is discharged, and the separated alkali solution is returned to the oxygen-liquid separator. After the hydrogen cooled by the hydrogen cooler enters the hydrogen-side water separator, the unqualified hydrogen is discharged, the qualified hydrogen is transported to the hydrogen purification system, and the separated alkali solution is returned to the hydrogen-liquid separator.
[0018] The height of the alkali liquid buffer tank is lower than that of the oxygen-liquid separator, the hydrogen-liquid separator, the oxygen scrubber and the hydrogen scrubber, so that the oxygen-liquid separator, the hydrogen-liquid separator, the oxygen scrubber and the hydrogen scrubber can overflow the alkali liquid into the alkali liquid buffer tank.
[0019] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.
[0020] The meaning of "and / or" described in this application means that the situations where each exists alone or both exist at the same time are included.
[0021] The term “connection” as used in this application may mean a direct connection between components or an indirect connection between components via other components.
[0022] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A gas-liquid separation system with an additional alkali liquid buffer tank, comprising an electrolyzer, an oxygen-liquid separator, a hydrogen-gas-liquid separator, an oxygen scrubber, a hydrogen scrubber, an oxygen-side water separator, a hydrogen-side water separator, an alkali liquid cooler and an alkali liquid circulation pump, characterized in that: It also includes an alkali liquid buffer tank, the water inlet end of the alkali liquid buffer tank is connected to the water outlet ends of the oxygen-liquid separator, the hydrogen-gas-liquid separator, the oxygen washing tower and the hydrogen washing tower respectively, the water outlet end of the alkali liquid buffer tank is connected to the water inlet end of the alkali liquid cooler, the water outlet end of the alkali liquid cooler is connected to the water inlet end of the electrolyzer through an alkali liquid circulation pump, the gas outlet end of the electrolyzer is connected to the gas inlet ends of the oxygen-liquid separator and the hydrogen-gas-liquid separator, the gas outlet end of the oxygen-liquid separator is connected to the gas inlet end of the oxygen washing tower, and the gas outlet end of the hydrogen-gas-liquid separator is connected to the gas inlet end of the hydrogen washing tower.
2. The gas-liquid separation system with an additional alkali solution buffer tank according to claim 1, characterized in that: Water is electrolyzed in the electrolytic cell to generate oxygen and hydrogen, and alkali liquid entrained in the oxygen / hydrogen is transported from the gas outlet of the electrolytic cell to the gas inlet of the oxygen-liquid separator / hydrogen-gas-liquid separator through a pipeline, and the alkali liquid separated by the oxygen-liquid separator / hydrogen-gas-liquid separator is transported from the water outlet to the water inlet of the alkali liquid buffer tank through a pipeline.
3. The gas-liquid separation system with an additional alkali solution buffer tank according to claim 1, characterized in that: The oxygen / hydrogen after separation and treatment by the oxygen-liquid separator / hydrogen-liquid separator still contains alkali solution. The oxygen / hydrogen coming out from the gas outlet of the oxygen-liquid separator / hydrogen-liquid separator is transported to the gas inlet of the oxygen washing tower / hydrogen washing tower through a pipeline. After the oxygen / hydrogen is washed in the oxygen washing tower / hydrogen washing tower, the washed alkali solution is transported from the water outlet of the oxygen washing tower / hydrogen washing tower to the water inlet of the alkali solution buffer tank through a pipeline.
4. The gas-liquid separation system with an additional alkali solution buffer tank according to claim 3 is characterized in that: It also includes an oxygen cooler and a hydrogen cooler. The oxygen / hydrogen passed through the oxygen washing tower / hydrogen washing tower is transported from the gas outlet end to the oxygen cooler / hydrogen cooler, and the oxygen / hydrogen coming out of the oxygen cooler / hydrogen cooler is transported to the oxygen side water separator / hydrogen side water separator.
5. The gas-liquid separation system with an additional alkali solution buffer tank according to claim 4 is characterized in that: The oxygen-side water separator is provided with an oxygen venting port, and the oxygen separated by the oxygen-side water separator is vented from the oxygen venting port of the oxygen-side water separator, and the water or alkali solution separated by the oxygen-side water separator is transported from its water outlet to the water inlet of the oxygen-liquid separator; The hydrogen side water separator is provided with an unqualified hydrogen venting port. After separation by the hydrogen side water separator, qualified hydrogen enters the hydrogen purification system, and unqualified hydrogen is discharged from the unqualified hydrogen venting port. The water or alkali liquid separated by the hydrogen side water separator is transported from its water outlet end to the water inlet end of the oxygen liquid separator.
6. The gas-liquid separation system with an additional alkali solution buffer tank according to claim 1, characterized in that: The oxygen scrubber / hydrogen scrubber also receives added raw water, and the raw water is transported to the water inlet of the alkali solution buffer tank through a pipeline through the water outlet of the oxygen scrubber / hydrogen scrubber.
7. The gas-liquid separation system with an additional alkali solution buffer tank according to claim 1, characterized in that: The height of the alkali liquid buffer tank is lower than the heights of the oxygen-liquid separator, the hydrogen-liquid separator, the oxygen washing tower and the hydrogen washing tower.