CN212127508U - Skid block for adsorbing and purifying hydrogen - Google Patents
Skid block for adsorbing and purifying hydrogen Download PDFInfo
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- CN212127508U CN212127508U CN202020489805.8U CN202020489805U CN212127508U CN 212127508 U CN212127508 U CN 212127508U CN 202020489805 U CN202020489805 U CN 202020489805U CN 212127508 U CN212127508 U CN 212127508U
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Abstract
An adsorption purification hydrogen skid block is used for further purifying hydrogen of a hydrogen station fuel. Comprises at least two adsorption towers and a process connecting pipeline, wherein the inlets of the two towers are provided with discharge pipelines, and the discharge pipelines are provided with safety valves; the device comprises a temperature adjusting system for heating two adsorption towers, wherein the temperature adjusting system comprises an electric heating resistance wire, a temperature transmitter, a temperature controller, an electric heater and a temperature switch; fixed bed adsorbent is arranged in the two towers. Calculating the pressure PE ═ PH ^ PL ^ of the switching adsorption tower through the highest pressure PH and the lowest pressure PL according to different output pressures0.5To realize the switching of the adsorption towerThe problem of two adsorption tower pressure unbalance because of output pressure difference leads to among the prior art is solved to cause adsorbent adsorption efficiency to reduce, adopt high low pressure adsorption tower to carry out the edulcoration to different input pressure, guaranteed two tower adsorption efficiency's balance, make hydrogen purification effect better.
Description
Technical Field
The utility model relates to a purification of industry hydrogen is related to a Temperature Swing Adsorption (TSA) technology that hydrogenation station is available, is applicable to the further purification of hydrogenation station fuel hydrogen, is used for the energy of hydrogen fuel cell car as fuel hydrogen after the purification.
Background
With the breakthrough of multiple key technologies and the localization of main materials of the hydrogen fuel cell, the performance and the service life of the hydrogen fuel cell are greatly improved, the cost is rapidly reduced, the development of the hydrogen energy industry is rapid, and the yield and the purity of hydrogen serving as fuel become important factors for determining the service life and the operation cost of a fuel cell automobile.
However, some current fuels do not meet the quality standards of hydrogen. The fuel hydrogen has a few sources, and some fuel hydrogen manufacturers can only replace the pure hydrogen (99.99% v/v) which does not meet the standard or the high-purity hydrogen (99.999% v/v) which has a high price, however, CO and CO in the industrial pure hydrogen2、N2、CH4The content of CO in the high-purity hydrogen also does not meet the standard of fuel hydrogen. And in current hydrogen transportation process, mostly use the long-tube trailer to unload gas, because trailer unloads gas in-process delivery pressure and reduces gradually or produce undulantly, present device to raw materials hydrogen edulcoration all is the absorption under the fixed pressure, is difficult to confirm the quantity of adsorbent.
Disclosure of Invention
To the technical problem who appears among the prior art, the utility model provides a pressure swing adsorption purification hydrogen sled piece solves among the prior art because of the different two adsorption tower pressures that lead to of output pressure are uneven to cause adsorbent adsorption efficiency to reduce, exert an influence to the edulcoration effect of hydrogen.
The utility model discloses a divide into several parts with long-tube trailer's hydrogen according to pressure range, every part filters through different adsorption towers, and the hydrogenation machine is all carried to the product gas. After the adsorption of the adsorbent is finished, the adsorbent is regenerated in an electric heating mode. The adsorption tower adsorbs at a lower temperature (normal temperature or lower), and desorbs adsorbed components at a higher temperature to regenerate the adsorbent, so that the adsorbent can be recycled.
In order to achieve the above purpose, the utility model discloses a technical scheme is:
a pressure swing adsorption purified hydrogen skid block comprises at least two adsorption towers and a process connecting pipeline, wherein one adsorption tower is used as a high-pressure tower, the other adsorption tower is used as a low-pressure tower, switching is carried out according to the pressure of input raw materials, the two towers are provided with discharge pipelines, and flame arresters are arranged on the discharge pipelines; the temperature control system comprises an electric heating resistance wire for heating the two adsorption towers, a temperature transmitter for collecting and transmitting the temperature in the adsorption towers, a temperature controller for receiving signals of the temperature transmitter and realizing temperature control, an electric heater for receiving signals of the temperature controller and realizing heating control of the electric heating resistance wire, and a temperature switch for automatically controlling and preventing the resistance wire from overheating; fixed bed adsorbents are arranged in the high-pressure tower and the low-pressure tower.
Further, the cut column pressure of the adsorption column is determined according to the following manner: PE ═ PH*PL)^0.5Wherein PE is the pressure of the cutting tower; PH is the highest pressure of delivery; PL is the lowest pressure delivered.
Further, including cutting tower control system, this control system includes the pressure transmitter on the adsorption tower entry long tube trailer, is equipped with pressure regulating valve including high and low pressure adsorption tower entry respectively, including pressure control system, realizes feed gas delivery pressure control through pressure control system to realize the switching of high and low pressure adsorption tower according to following mode:
when two towers are used for adsorption, tower pressure is cut
When three-tower adsorption is carried out, tower pressure is cut
When four towers are used for adsorption, tower pressure is cut
When n tower is used for adsorption, tower pressure is cut
Wherein: pHIs the pressure, P, before unloading of the long-tube trailerLThe pressure of the long-tube trailer after unloading.
The technical effects of the utility model are that:
1, this adsorption equipment method can be used to the filtration of the hydrogen long-tube trailer gas unloading process at hydrogenation station, is applicable to the air supply pressure that pressure is invariable between 40 ~ 3MPAG or air supply pressure reduces gradually or the very low operating mode of air supply pressure, for example can be used to the purification of the hydrogen of 20MPAG long-tube trailer, also can be applied to the hydrogen purification that hydrogen preparation end pressure is invariable.
2, adjusting the type of the adsorbent according to the type and the amount of impurities in the raw material, wherein the adsorbent can be molecular sieve, silica gel, activated alumina and the like.
And 3, an electric resistance wire is adopted for heating, so that the investment of public works is reduced, and the device is simplified.
And 4, according to different unloading time, the adsorption towers can be sequentially regenerated.
And 5, the high-low pressure adsorption towers are adopted to remove impurities according to different input pressures, so that the balance of the adsorption efficiency of the two towers is ensured, and the hydrogen purification effect is better.
Drawings
Fig. 1 is a schematic view of the structure of the device of the present invention.
In the figure: 1. a flame arrestor; 2. a temperature transmitter; 3. a high pressure column; 4. electrically heating the resistance wire; 5. a temperature controller; 6. an electric heater; 7. a temperature switch; 8. a low pressure column; 9. a discharge line; 10. a pressure transmitter; 11. a pressure control system; 12. a pressure regulating valve.
Detailed Description
The utility model discloses pressure swing adsorption purification hydrogen sled piece includes two at least adsorption towers and technology connecting line, and one of them adsorption tower is as high-pressure column 3, and another is as low-pressure column 8, and two tower entries are equipped with discharge line 9, are equipped with spark arrester 1 on this discharge line, and discharge line is used for the regeneration operating mode pressure release, discharges safe position. The utility model discloses still including the temperature regulation system who is used for heating to two adsorption towers, this temperature regulation system includes the electrical heating resistance wire 4 to the adsorption tower heating, including being used for temperature acquisition and the temperature transmitter 2 of carrying in the adsorption tower, including being used for receiving temperature transmitter 2 signals and realizing temperature control's temperature controller 5, including being used for receiving temperature controller 5 signals and realizing electrical heating resistance wire 4 heating control's electric heater 6, including the temperature switch 7 through automatic realization temperature overheat control. The utility model discloses well electrical heating resistance wire 4 sets up the outer wall at two adsorption towers, realizes control through predetermineeing the temperature value. The heating mode of the electric heating resistance wire 4 is adopted, so that the investment of the existing public works heated by heat media such as steam is reduced, the device is simplified, and the miniaturization of the device can be realized.
The utility model discloses be equipped with the fixed bed adsorbent in middle and high pressure tower 3 and the low pressure tower 8, can be according to the kind and the quantity of impurity in the feed gas that gets into two adsorption towers, adjust the type of used adsorbent, like available molecular sieve of adsorbent, silica gel, active alumina etc. realize the directional edulcoration of feed gas.
The utility model discloses the hydrogen purification operation that the device can be used to 40-3 MPaG's air supply pressure to reduce gradually uses the pressure 20-5Mpa when present common long-tube trailer unloads hydrogen below, uses two towers to adsorb as the brief description process flow as follows for the example:
the hydrogen of the feed gas that 20MPaG long-tube trailer came is because of pressure is higher, carries earlier to high-pressure column 3 and adsorbs, when gas pressure reduced to 10MPaG, switches to low-pressure column 8 and adsorbs until long-tube trailer pressure reduces to 5MPaG, and long-tube trailer stops the feeding, the product behind high-pressure column 3 and the 8 desorption impurity of low-pressure columnThe gas is sent to a downstream compressor or hydrogenation tank. During pressure fluctuation operation in other working conditions, the highest pressure P is passedHAnd a minimum pressure PLCalculating the pressure PE ═ P of the switching adsorption columnH*PL)^0.5. The cut column pressure in this example was determined as: PE ═ 20 x 5 ^0.510 MPaG. After adsorption is completed, the adsorbent is regenerated by heating the adsorbent through the electric heating resistance wire 4, impurities adsorbed by the adsorbent are effectively removed, and the adsorbent after the impurities are removed is recycled to wait for purifying the next long-tube trailer.
Example 1: purifying the discharged hydrogen of the tube trailer: the adsorption tower is divided into a 2m high-pressure tower 3 and a 2m low-pressure tower 8, when the gas discharging range of the hydrogen long-tube trailer is 20-10 MPa, the high-pressure tower 3 is used for adsorption, when the pressure is reduced to 10-5 MPa, the low-pressure tower 8 is switched to be used for adsorption, when the low-pressure tower 8 is used for adsorption, the high-pressure tower 3 is heated to 120-170 ℃ by using an electric heating resistance wire 4 to carry out the desorption of the adsorbent, so that the impurity components adsorbed by the adsorbent are desorbed, and the safe discharge is realized. Before the next adsorption, the low-pressure tower 8 is analyzed, the low-pressure tower 8 is heated to 120-170 ℃ by the electric heating resistance wire 4 to analyze the adsorbent, so that impurity components adsorbed by the adsorbent are desorbed and safely discharged. The purified product meets the standard of fuel hydrogen.
Example 2: the difference from example 1 is that the adsorption column in this example is divided into 1.2m high-pressure column A/B and 1.2m low-pressure column C/D in parallel.
When the gas discharging range of the hydrogen long-tube trailer is 20-10 MPa, the high-pressure tower 3 is used for adsorption, when the pressure is reduced to 10-5 MPa, the low-pressure tower 8 is used for adsorption, and when the low-pressure tower 8 is used for adsorption, the high-pressure tower 3 is heated to 120-170 ℃ by using the electric heating resistance wire 4 for desorption of the adsorbent, so that impurity components adsorbed by the adsorbent are desorbed and safely discharged. Before the next adsorption, the low-pressure tower 8 is analyzed, the low-pressure tower 8 is heated to 120-170 ℃ by the electric heating resistance wire 4 to analyze the adsorbent, so that impurity components adsorbed by the adsorbent are desorbed and safely discharged. The purified product meets the standard of fuel hydrogen.
It should be further noted that the above two embodiments are only for making clear the technical solution of the present invention, the adsorption towers are not limited to the settings defined in the two embodiments, and the adsorption towers can be set to be 3, 4 or more, and the size of the adsorption towers can be adjusted according to actual needs according to different setting numbers. When switching high low pressure adsorption tower, adjust according to the delivery pressure of the hydrogen of unloading of long tube trailer, specific adjustment mode is:
when two towers are used for adsorption, tower pressure is cut
When three-tower adsorption is carried out, tower pressure is cut
When four towers are used for adsorption, tower pressure is cut
When n tower is used for adsorption, tower pressure is cut
Wherein: pHIs the pressure, P, before unloading of the long-tube trailerLThe pressure of the long-tube trailer after unloading.
The pressure range when the hydrogen is unloaded to the current common long-tube trailer is 20-5Mpa, when two towers are adopted for adsorption, the tower cutting pressure PE is P1 ═ 20 ^ 50.5＝10MPaG。
The utility model discloses high-low pressure adsorption tower pressure switches and realizes through the manual feed valve who opens or close two towers, also can accomplish through following mode: the utility model discloses adsorption tower inlet pipeline is equipped with pressure transmitter 10, and high-low pressure adsorption tower entry is equipped with pressure regulating valve 12 respectively, is equipped with pressure control system 11 and realizes pressure monitoring like PLC to realize the switching of high-low pressure adsorption tower through above formula according to predetermineeing the procedure. When the conveying pressure is in a preset value high-pressure range, an inlet valve of the high-pressure tower 3 is opened, an inlet valve of the low-pressure tower 8 is closed, and the raw material hydrogen enters the high-pressure tower 3 to remove impurities. When the conveying pressure is gradually reduced and reaches a preset value low-pressure range, the program control realizes that the inlet valve of the high-pressure tower 3 is closed, the inlet valve of the low-pressure tower 8 is opened, and the raw material hydrogen enters the low-pressure tower 8 for impurity removal, so that the switching of the high-pressure tower and the low-pressure tower is realized.
Claims (6)
1. The utility model provides an adsorb purification hydrogen sled piece which characterized by: the device comprises at least two adsorption towers and a process connecting pipeline, wherein one adsorption tower is used as a high-pressure tower (3), the other adsorption tower is used as a low-pressure tower (8), switching is performed according to the pressure of input raw material gas, the inlets of the two towers are provided with discharge pipelines (9), and flame arresters (1) are arranged on the discharge pipelines; the temperature control system comprises an electric heating resistance wire (4) for heating the two adsorption towers, a temperature transmitter (2) for collecting and transmitting the temperature in the adsorption towers, a temperature controller (5) for receiving a signal of the temperature transmitter (2) and realizing temperature control, an electric heater (6) for receiving a signal of the temperature controller (5) and realizing heating control of the electric heating resistance wire (4), and a temperature switch (7) for manually realizing temperature control; fixed bed adsorbents are arranged in the high pressure tower (3) and the low pressure tower (8).
2. The adsorptive purification hydrogen skid of claim 1, wherein: the electric heating resistance wire (4) is arranged on the outer walls of the two adsorption towers and is controlled by presetting a temperature value.
3. The adsorptive purification hydrogen skid of claim 1, wherein: the adsorbent is molecular sieve, silica gel or activated alumina, and is selected according to the type and amount of impurities in the raw material gas.
4. The adsorptive purification hydrogen skid of claim 1, wherein: the pressure of the adsorption column cut was determined in the following manner: PE ═ PH ^ PL ^ s0.5Wherein PE is the pressure of the cutting tower; PH is the highest pressure of delivery; pL is the lowest pressure delivered.
5. The adsorptive purification hydrogen skid of claim 1, wherein: the pressure of the adsorption column cut was determined in the following manner:
when two towers are used for adsorption, tower pressure is cut
When three-tower adsorption is carried out, tower pressure is cut
When four towers are used for adsorption, tower pressure is cut
When n tower is used for adsorption, tower pressure is cut
Wherein: pHIs the pressure, P, before unloading of the long-tube trailerLThe pressure of the long-tube trailer after unloading.
6. The adsorptive purified hydrogen skid of claim 5, wherein: including cutting the tower control system, this control system includes that the pressure transmitter that adsorption tower inlet pipeline was equipped with, including high-low pressure adsorption tower entry be equipped with pressure regulating valve respectively, including pressure control system, realize feed gas delivery pressure through pressure control system and monitor to the mode according to claim 5 realizes the switching of high-low pressure adsorption tower.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020489805.8U CN212127508U (en) | 2020-04-07 | 2020-04-07 | Skid block for adsorbing and purifying hydrogen |
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| CN202020489805.8U CN212127508U (en) | 2020-04-07 | 2020-04-07 | Skid block for adsorbing and purifying hydrogen |
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| CN212127508U true CN212127508U (en) | 2020-12-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111333030A (en) * | 2020-04-07 | 2020-06-26 | 北京佳安氢源科技股份有限公司 | Skid block for adsorbing and purifying hydrogen |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111333030A (en) * | 2020-04-07 | 2020-06-26 | 北京佳安氢源科技股份有限公司 | Skid block for adsorbing and purifying hydrogen |
| CN111333030B (en) * | 2020-04-07 | 2024-04-02 | 北京佳安氢源科技股份有限公司 | Adsorption purification hydrogen sled piece |
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