Hydrogen purification system

Abstract

The utility model discloses a hydrogen purification system which comprises a deoxidizing tower, a first drying tower, a second drying tower, a third drying tower, a first condenser, a second condenser, a third condenser, a fourth condenser and a water collector, the deoxidizing tower is connected with the first condenser, the first condenser is respectively connected with the second condenser, the third condenser and the fourth condenser, the second condenser is respectively connected with the third condenser and the fourth condenser, the third condenser is connected with the fourth condenser, the first drying tower is connected with the second condenser, and the second drying tower is connected with the second condenser. The first drying tower is connected with a first condenser, the second drying tower is connected with a third condenser, the third drying tower is connected with a fourth condenser, the first drying tower, the second drying tower and the third drying tower are mutually connected, and the first condenser, the second condenser, the third condenser and the fourth condenser are all connected with a water collector. Zero emission in the normal production process is achieved, the utilization rate of hydrogen is increased, emission pollution is avoided, and regeneration is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydrogen purification, especially a hydrogen purification system. BACKGROUND

[0002] The traditional hydrogen purification system at the present stage is formed by one deoxidizing tower, two drying towers and two condensers. The raw hydrogen produced by the electrolytic stack is subjected to high-temperature deoxidization by the deoxidizing tower in the first step, is subjected to temperature reduction and condensation of water by the first condenser in the second step, is subjected to temperature reduction and condensation of water by the second condenser in the third step, is subjected to adsorption and drying by the first drying tower in the fourth step, and 99.999% high-purity hydrogen can be obtained. Then, most of the hydrogen is transmitted to the finished product storage or the end of consumption through the flow regulating valve. A part of the hydrogen is split off and is heated and the adsorbent is subjected to adsorption by the second drying tower in the fifth step, so that the water in the adsorbent is taken away by the gas, thereby achieving desorption and regeneration of the adsorbent and realizing reuse of the adsorbent in the second drying tower. Since the purity of the hydrogen does not meet the requirements due to the desorption and regeneration of the adsorbent in the second drying tower, the hydrogen can only be discharged through the emptying pipeline. At the same time, the condensed water formed by the two condensers can only be discharged through the drainage pipeline. Such a situation leads to waste of hydrogen and water resources and may cause certain emptying pollution. SUMMARY

[0003] The utility model aims at solving the deficiencies in the prior art and provides a hydrogen purification system. By improving the existing hydrogen purification system, zero emission in the normal production process is realized, the utilization rate of hydrogen is further improved, and economic benefits are improved. At the same time, all the condensed water can be recycled and used, water resources are further saved, and no emission pollution and regeneration are realized.

[0004] To achieve the above-mentioned purpose, the utility model provides a technical scheme of a hydrogen purification system. The hydrogen purification system comprises a deoxidizing tower, a first drying tower, a second drying tower, a third drying tower, a first condenser, a second condenser, a third condenser, a fourth condenser, a water collector and a pipeline. The deoxidizing tower is connected with the first condenser through the pipeline. The first condenser is connected with the second condenser, the third condenser and the fourth condenser through the pipeline respectively. The second condenser is connected with the third condenser and the fourth condenser through the pipeline respectively. The third condenser is connected with the fourth condenser through the pipeline. The first drying tower is connected with the second condenser through the pipeline. The second drying tower is connected with the third condenser through the pipeline. The third drying tower is connected with the fourth condenser through the pipeline. The first drying tower, the second drying tower and the third drying tower are connected with each other through the pipeline. The first condenser, the second condenser, the third condenser and the fourth condenser are connected with the water collector through the pipeline.

[0005] Further, the first drying tower, the second drying tower and the third drying tower are connected with a finished product storage end through pipelines.

[0006] Further, the system comprises a gas-liquid separator; the first condenser, the second condenser, the third condenser and the fourth condenser are provided with the gas-liquid separator, and the gas-liquid separator is connected with the water collector through a pipeline.

[0007] Further, the first condenser is provided with a valve at the pipeline connected with the second condenser, the third condenser and the fourth condenser respectively.

[0008] Further, the second condenser is provided with a valve at the pipeline connected with the third condenser and the fourth condenser respectively.

[0009] Further, the third condenser is provided with a valve at the pipeline connected with the fourth condenser.

[0010] Further, the first drying tower, the second drying tower and the third drying tower are provided with valves at the pipelines connected with each other.

[0011] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0012] The utility model discloses a drying tower circulation regeneration is realized through hydrogen, and the regenerated hydrogen is purified and guaranteed to reach finished product quality, makes drying tower to be able to long time circulation operation, avoids the emission pollution of regenerated hydrogen in normal production process, and no regenerated hydrogen loss, further improves the utilization rate and economic benefit of hydrogen. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 PID structure schematic diagram of the utility model.

[0014] Figure 2 The flow chart of the first mode of the utility model.

[0015] Figure 3 The flow chart of the second mode of the utility model.

[0016] Figure 4 The flow chart of the third mode of the utility model. DETAILED DESCRIPTION

[0017] The utility model will be further described below in combination with specific embodiment.

[0018] Embodiment 1

[0019] Reference Figure 1The hydrogen purification system provided in this embodiment includes a deoxygenation tower 1, a first drying tower 2, a second drying tower 3, a third drying tower 4, a first condenser 5, a second condenser 6, a third condenser 7, a fourth condenser 8, a gas-liquid separator, a water collector 9, and pipelines.

[0020] The deoxygenation tower 1 is connected to the first condenser 5 via a pipeline. The first condenser 5 is connected to the second condenser 6, the third condenser 7, and the fourth condenser 8 via pipelines and valves. The second condenser 6 is connected to the third condenser 7 and the fourth condenser 8 via pipelines and valves. The third condenser 7 and the fourth condenser 8 are connected via pipelines and valves. The first drying tower 2 is connected to the second condenser 6 via a pipeline. The second drying tower 3 is connected to the third condenser 7 via a pipeline. The third drying tower 4 is connected to the fourth condenser 8 via a pipeline. The first drying tower 2, the second drying tower 3, and the third drying tower 4 are interconnected via pipelines and valves. Each of the first condenser 5, the second condenser 6, the third condenser 7, and the fourth condenser 8 is equipped with a gas-liquid separator. The gas-liquid separator is connected to a water collector 9 via a pipeline. Each of the first drying tower 2, the second drying tower 3, and the third drying tower 4 is connected to a finished product storage end via pipelines and flow regulating valves. Finally, the purified hydrogen is transported to the finished product storage end.

[0021] The improved hydrogen purification system achieves zero emissions during normal production, further enhancing hydrogen utilization and economic efficiency. Simultaneously, it enables the recycling and reuse of all condensate, further conserving water resources and making the hydrogen purification system pollution-free and regenerable.

[0022] Example 2

[0023] See Figure 2 As shown, the purification process of the hydrogen purification system provided in this embodiment in the first mode is as follows:

[0024] 1) Pass the raw material hydrogen into the deoxygenation tower for high-temperature deoxygenation.

[0025] 2) The deoxygenated raw material hydrogen is introduced into the first condenser to cool down and condense the moisture.

[0026] 3) Pass the mixture into the second condenser to cool and condense the water.

[0027] 4) The condensed raw hydrogen is passed into the first drying tower for adsorption and drying, thus obtaining finished hydrogen with a purity of 99.999%. Most of the finished hydrogen is then transferred to the finished product storage end through a flow regulating valve.

[0028] 5) another small part of hydrogen gas is shunted to the second drying tower to heat the gas and the adsorbent, so that the water in the adsorbent is taken away by the gas, thereby achieving desorption and regeneration of the adsorbent, and the adsorbent in the second drying tower is reused. At the same time, the purity of this small part of hydrogen gas does not meet the requirements due to the desorption and regeneration of the adsorbent in the drying tower.

[0029] 6) the small part of hydrogen gas is passed into the third condenser to condense water.

[0030] 7) the small part of hydrogen gas is passed into the fourth condenser to condense water.

[0031] 8) after being dried in the third drying tower, the small part of hydrogen gas can also reach 99.999% high purity, and the purity meets the requirements, and is transmitted to the product storage end through the product pipeline. The water cooled by each condenser is also recycled to the water collecting tank through the added pipeline and the gas-liquid separator.

[0032] Example 3

[0033] Referring to Figure 3 , the purification process of the hydrogen gas purification system in the second mode provided by the embodiment is as follows:

[0034] 1) the raw hydrogen gas is passed into the deoxidizing tower to be deoxidized at high temperature.

[0035] 2) the raw hydrogen gas after deoxidization is passed into the first condenser to condense water.

[0036] 3) the raw hydrogen gas is passed into the third condenser to condense water.

[0037] 4) the raw hydrogen gas after condensation is passed into the second drying tower to be adsorbed and dried, that is, the product hydrogen gas reaching 99.999% high purity is obtained, and most of the product hydrogen gas is transmitted to the product storage end through the flow regulating valve.

[0038] 5) another small part of hydrogen gas is shunted to the third drying tower to heat the gas and the adsorbent, so that the water in the adsorbent is taken away by the gas, thereby achieving desorption and regeneration of the adsorbent, and the adsorbent in the third drying tower is reused. At the same time, the purity of this small part of hydrogen gas does not meet the requirements due to the desorption and regeneration of the adsorbent in the drying tower.

[0039] 6) the small part of hydrogen gas is passed into the fourth condenser to condense water.

[0040] 7) the small part of hydrogen gas is passed into the second condenser to condense water.

[0041] 8) After passing through the first drying tower for adsorption drying, the small part of hydrogen can also reach 99.999% high purity, and the purity meets the requirements, and is transmitted to the product storage end through the product pipeline. The water cooled down by each condenser is also recycled to the water collecting tank through the increased pipeline and the gas-liquid separator.

[0042] Embodiment 4

[0043] Referring to Figure 4 As shown in the figure, the purification process flow of the hydrogen purification system provided in the third mode of the embodiment is as follows:

[0044] 1) The raw hydrogen is passed into the deoxidizing tower for high-temperature deoxidization.

[0045] 2) The raw hydrogen after deoxidization is passed into the first condenser for cooling and condensing water.

[0046] 3) The hydrogen is passed into the fourth condenser for cooling and condensing water.

[0047] 4) The raw hydrogen after condensation is passed into the third drying tower for adsorption drying, that is, the product hydrogen reaching 99.999% high purity is obtained, and most of the product hydrogen is transmitted to the product storage end through the flow regulating valve.

[0048] 5) Another small part of hydrogen is branched off and passed into the first drying tower for heating the gas and the adsorbent, so that the water of the adsorbent is taken away by the gas, thereby achieving the desorption and regeneration of the adsorbent, and the adsorbent of the first drying tower is reused. At the same time, the purity of the small part of hydrogen does not meet the requirements due to the desorption and regeneration of the drying tower adsorbent.

[0049] 6) The small part of hydrogen is passed into the second condenser for cooling and condensing water.

[0050] 7) The hydrogen is passed into the third condenser for cooling and condensing water.

[0051] 8) After passing through the second drying tower for adsorption drying, the small part of hydrogen can also reach 99.999% high purity, and the purity meets the requirements, and is transmitted to the product storage end through the product pipeline. The water cooled down by each condenser is also recycled to the water collecting tank through the increased pipeline and the gas-liquid separator.

[0052] The above-mentioned embodiments are only the preferred embodiments of the present application, and do not limit the scope of the present application. Any changes made according to the shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A hydrogen purification system, characterized by: It comprises a deoxidizing tower, a first drying tower, a second drying tower, a third drying tower, a first condenser, a second condenser, a third condenser, a fourth condenser, a water collector and pipelines; the deoxidizing tower is connected with the first condenser through a pipeline, the first condenser is connected with the second condenser, the third condenser and the fourth condenser through pipelines respectively, the second condenser is connected with the third condenser and the fourth condenser through pipelines respectively, the third condenser is connected with the fourth condenser through a pipeline, the first drying tower is connected with the second condenser through a pipeline, the second drying tower is connected with the third condenser through a pipeline, the third drying tower is connected with the fourth condenser through a pipeline, and the first drying tower, the second drying tower and the third drying tower are connected with each other through pipelines, and the first condenser, the second condenser, the third condenser and the fourth condenser are connected with the water collector through pipelines.

2. The hydrogen purification system of claim 1, wherein: The first drying tower, the second drying tower and the third drying tower are connected with a finished product storage end through pipelines.

3. The hydrogen purification system of claim 1, wherein: It comprises a gas-liquid separator; the first condenser, the second condenser, the third condenser and the fourth condenser are all provided with a gas-liquid separator, and the gas-liquid separator is connected with the water collector through a pipeline.

4. The hydrogen purification system of claim 1, wherein: Valves are arranged at the pipelines connecting the first condenser with the second condenser, the third condenser and the fourth condenser respectively.

5. The hydrogen purification system of claim 1, wherein: Valves are arranged at the pipelines connecting the second condenser with the third condenser and the fourth condenser respectively.

6. The hydrogen purification system of claim 1, wherein: A valve is arranged at the pipeline connecting the third condenser with the fourth condenser.

7. The hydrogen purification system of claim 1, wherein: Valves are arranged at the pipelines connecting the first drying tower, the second drying tower and the third drying tower with each other.

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