CN214635184U - Temperature swing adsorption system without purified gas loss - Google Patents
Temperature swing adsorption system without purified gas loss Download PDFInfo
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- CN214635184U CN214635184U CN202120364309.4U CN202120364309U CN214635184U CN 214635184 U CN214635184 U CN 214635184U CN 202120364309 U CN202120364309 U CN 202120364309U CN 214635184 U CN214635184 U CN 214635184U
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Abstract
The utility model discloses a temperature swing adsorption system without purified gas loss, which comprises a product raw gas input pipeline, a purified raw gas input pipeline and a flushing pipeline which are connected into an adsorption tower, a product gas output pipeline, a purified gas output pipeline and a regenerated gas output pipeline which are connected out of the adsorption tower, and a raw gas input pipeline which is communicated with the product raw gas input pipeline and the purified raw gas input pipeline; the temperature swing adsorption system also comprises a regeneration gas return pipeline communicated with the product raw gas input pipeline and the regeneration gas output pipeline, and a flow regulating valve arranged on the product raw gas input pipeline. The utility model discloses in make product feed gas pressure low than the pressure of regeneration gas through flow control valve to converge the regeneration gas into the product feed gas and let the regeneration gas separate the purification along with the product feed gas together, realized purifying gas 100% recycle, avoided the waste of the energy.
Description
Technical Field
The utility model relates to a temperature swing adsorption technique, concretely relates to temperature swing adsorption system of no purification gas loss.
Background
Temperature Swing Adsorption (TSA) technology is widely used for gas separation and purification in the petrochemical industry. In the prior art, common hydrogen drying, natural gas drying and VOC treatment generally adopt a temperature swing adsorption process technology comprising 2-3 adsorption towers. The regeneration of the adsorption tower usually adopts decompressed low-pressure purified gas as a regeneration gas source of the adsorption tower. Because the pressure of the purified gas used for regeneration of the adsorption tower is low, the regenerated process gas cannot be recovered and can only enter a fuel gas pipe network in a plant or be discharged to a torch system for burning, and the analysis from the aspects of technical economy and environmental protection is unreasonable.
According to the industrial experience, if low-pressure purified gas is used as a regeneration gas source of the adsorption tower, the amount of purified gas used for regeneration is about 10-18% of the raw material gas amount of the temperature swing adsorption device, and if the purified gas used for regeneration of the adsorption tower is not recycled, not only can the energy be greatly wasted, but also the emission of tail gas is increased.
SUMMERY OF THE UTILITY MODEL
In order to reduce the waste of the energy, the utility model provides a temperature swing adsorption system of no purification gas loss.
In order to achieve the above object, the utility model adopts the following technical scheme:
a temperature swing adsorption system without purified gas loss comprises an adsorption tower, a product raw gas input pipeline, a purified raw gas input pipeline and a flushing pipeline which are connected into the adsorption tower, a product gas output pipeline, a purified gas output pipeline and a regenerated gas output pipeline which are connected out of the adsorption tower, and a raw gas input pipeline which is communicated with the product raw gas input pipeline and the purified raw gas input pipeline; the temperature swing adsorption system also comprises a regeneration gas return pipeline communicated with the product raw gas input pipeline and the regeneration gas output pipeline, and a flow regulating valve arranged on the product raw gas input pipeline; wherein, along the flow direction of the product raw material gas, a flow regulating valve and a regeneration gas return pipeline connected to the product raw material gas input pipeline are sequentially arranged on the product raw material gas input pipeline; the flow regulating valve reduces the pressure of the product raw material gas so that the regenerated gas returned by the regenerated gas return pipeline is converged into the product raw material gas input pipeline; the number of the adsorption towers is at least 3.
Preferably, the temperature swing adsorption system further comprises a hot blowing pipeline and a cold blowing pipeline for communicating the purified gas output pipeline with the flushing pipeline, and program control valves arranged on the product raw gas input pipeline, the purified raw gas input pipeline, the flushing pipeline, the product gas output pipeline, the purified gas output pipeline, the regeneration gas output pipeline, the hot blowing pipeline and the cold blowing pipeline.
Preferably, a heater for heating the purge gas is disposed on the hot blowing line.
Preferably, the temperature swing adsorption system further comprises a cooler and a gas-liquid separator which are sequentially arranged on the regenerated gas output pipeline along the flow direction of the regenerated gas, and a condensate output pipeline connected with the gas-liquid separator; wherein, the gas phase of the regenerated gas separated by the gas-liquid separator is converged into a product raw gas input pipeline through a regenerated gas return pipeline, and the liquid phase is conveyed to the outside of the battery limits through a condensate output pipeline.
Preferably, the temperature swing adsorption system further comprises a pressure regulating valve disposed on the product gas outlet line.
Preferably, the product raw gas input pipeline, the purified raw gas input pipeline and the flushing pipeline are all connected from the top of the adsorption tower, and the product gas output pipeline, the purified gas output pipeline and the regeneration gas output pipeline are all connected from the bottom of the adsorption tower.
Preferably, the temperature swing adsorption system further comprises a raw material gas flowmeter arranged on the raw material gas input pipeline, and a purified raw material gas flowmeter arranged on the purified raw material gas input pipeline; wherein the purification raw material gas flowmeter is associated with the flow regulating valve.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses return pipeline and flow control valve with the regeneration gas and combine the use, the utility model provides a regeneration gas returns the pipeline and inserts in the product feed gas input pipeline after the flow control valve along product feed gas flow direction. The utility model discloses utilize flow control valve to make the pressure ratio of product feed gas 10 ~ 20kPa lower than the regeneration gas to return the regeneration gas that the pipeline returned through the regeneration gas and converge product feed gas input pipeline, let the regeneration gas adsorb the separation purification along with the product feed gas, realized the recycle of regeneration gas, and the purification gas has reached 100% rate of recovery, has avoided the waste of the energy.
(2) The utility model provides a purify gas and avoid selecting for use other purification air supply (like nitrogen) to the adsorption tower regeneration, because in the adsorption tower regeneration process, must have partial purification gas to remain in the adsorption tower, if select for use other purification gas to regenerate the adsorption tower, must lead to the fact to adsorb to contain in the product gas that the purification obtained in the adsorption tower and purify (like nitrogen) to make the purity of product gas reduce.
(3) The utility model discloses including 3 at least adsorption towers. One adsorption tower is in pre-adsorption, one adsorption tower is in adsorption, and one adsorption tower is in regeneration and operates cyclically. And one adsorption tower is ensured to be in an adsorption state at any time, so that the whole system can continuously run.
(4) The utility model discloses well be used for the purification gas of adsorption tower hot-blow and cold-blow to obtain after the purification feed gas adsorbs the edulcoration in advance through the adsorption tower, and, the utility model provides an adsorption tower purifies the consumption of gas little in regeneration process, and the adsorption tower regeneration is more thorough, and adsorbent dynamic adsorption capacity is bigger.
(5) The utility model discloses be equipped with pressure regulating valve on product gas output pipeline, the utility model discloses a pressure regulating valve and flow control valve use in combination, thereby it is right to realize the utility model provides an adsorption tower's adsorption pressure carries out controllable regulation.
(6) The utility model discloses in at raw material gas input pipeline, purify raw material gas input pipeline, wash pipeline, product gas output pipeline, purify gas output pipeline, regeneration gas output pipeline, hot blow pipeline, cold blow pipeline and all be equipped with the programmable valve to make every adsorption tower all have independent programmable valve and pipeline. Consequently, every adsorption tower can not mutual influence when carrying out absorption, regeneration in advance, guarantees the utility model discloses a long period steady operation.
Drawings
Fig. 1 is a schematic structural diagram of the present invention when the number of the adsorption towers is 3.
Wherein, the names corresponding to the reference numbers are:
1-an adsorption tower, 2-a product raw material gas input pipeline, 3-a purified raw material gas input pipeline, 4-a flushing pipeline, 5-a product gas output pipeline, 6-a purified gas output pipeline, 7-a regenerated gas output pipeline, 8-a hot blowing pipeline, 9-a cold blowing pipeline, 11-a flow regulating valve, 12-a heater, 13-a cooler, 14-a gas-liquid separator, 15-a condensate output pipeline, 16-a pressure regulating valve, 17-a purified raw material gas flowmeter, 18-a raw material gas flowmeter, 19-a regenerated gas return pipeline, 20-a raw material gas input pipeline, 10-1-a purified raw material gas input program control valve, 10-2-a product raw material gas input program control valve, and 10-3-a purified gas input program control valve, 10-4-product gas output program control valve, 10-5-purified gas output program control valve, 10-6-regeneration gas output program control valve, 10-7-hot blowing program control valve and 10-8-cold blowing program control valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus, it should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; of course, mechanical connection and electrical connection are also possible; in addition, the elements may be directly connected or indirectly connected through intervening elements, or the elements may be in communication with each other. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Examples
Example 1
The temperature swing adsorption system without purified gas loss comprises an adsorption tower 1, a product raw gas input pipeline 2, a purified raw gas input pipeline 3, a flushing pipeline 4, a product gas output pipeline 5, a purified gas output pipeline 6, a regenerated gas output pipeline 7, a hot blowing pipeline 8, a cold blowing pipeline 9, a program control valve, a flow regulating valve 11, a regenerated gas return pipeline 19 and a raw gas input pipeline 20.
Specifically, at least 3 adsorption towers 1 are arranged in parallel, a product raw gas input pipeline 2, a purification raw gas input pipeline 3 and a flushing pipeline 4 are connected into the adsorption towers 1, and a product gas output pipeline 5, a purification gas output pipeline 6 and a regeneration gas output pipeline 7 are connected out of the adsorption towers 1; in the present embodiment, the product raw gas input line 2, the purified raw gas input line 3, and the purge line 4 are connected to the adsorption tower 1 from the top of the adsorption tower 1, and the product gas output line 5, the purified gas output line 6, and the regeneration gas output line 7 are connected to the adsorption tower 1 from the bottom of the adsorption tower 1. According to different practical application scenarios, the product raw gas input pipeline 2, the purified raw gas input pipeline 3 and the flushing pipeline 4 can be connected into the adsorption tower 1 from other positions of the adsorption tower 1, and the product gas output pipeline 5, the purified gas output pipeline 6 and the regeneration gas output pipeline 7 can also be connected out of the adsorption tower 1 from other positions of the adsorption tower 1.
Specifically, the hot blow line 8 and the cold blow line 9 communicate and are juxtaposed to each other the purge gas output line 6 and the purge line 4; in the present embodiment, when the purge gas outlet line 6 and the purge line 4 are communicated by the hot blow line 8, the adsorption tower is subjected to the hot blow step in the regeneration step at this time; when the cold blowing pipeline 9 connects the purified gas output pipeline 6 with the flushing pipeline 4, the adsorption tower after hot blowing is subjected to cold blowing at the moment; the regeneration of the adsorption tower is completed after the adsorption tower is sequentially subjected to hot blowing and cold blowing.
Specifically, the raw material gas input pipeline 20 is communicated with both the product raw material gas input pipeline 2 and the purification raw material gas input pipeline 3, so that the raw material gas is divided into a purification raw material gas and a product raw material gas, wherein the purification raw material gas enters the purification raw material gas input pipeline 3, and the product raw material gas enters the product raw material gas input pipeline 2. A regeneration gas return line 19 communicates the regeneration gas output line 7 with the product feed gas input line 2.
In order to allow the regeneration gas in the regeneration gas return line 19 to merge into the product feed gas input line 2, a flow control valve 11 is provided on the product feed gas input line 2. Specifically, along the flow direction of the product raw material gas, a flow regulating valve 11 and a regeneration gas return pipeline 19 connected to the product raw material gas input pipeline 2 are sequentially arranged on the product raw material gas input pipeline 2; in the in-service use process, carry out the decompression through flow control valve 11 to the product feed gas, let the pressure ratio of the regeneration gas that returns from regeneration gas return line 19 be 10 ~ 20kPa higher than the pressure of product feed gas to in gathering the regeneration gas into product feed gas input pipeline 2, the regeneration gas enters into the adsorption tower along with the product feed gas and separates the purification, realizes the 100% recovery of purifying gas, has avoided the waste of the energy.
In order to enable each adsorption tower to operate independently, program control valves are arranged on a product raw material gas input pipeline 2, a purification raw material gas input pipeline 3, a flushing pipeline 4, a product gas output pipeline 5, a purification gas output pipeline 6, a regeneration gas output pipeline 7, a hot blowing pipeline 8 and a cold blowing pipeline 9. Specifically, the program control valves comprise a purification raw material gas input program control valve 10-1, a product raw material gas input program control valve 10-2, a purification gas input program control valve 10-3, a product gas output program control valve 10-4, a purification gas output program control valve 10-5, a regeneration gas output program control valve 10-6, a hot blowing program control valve 10-7 and a cold blowing program control valve 10-8; the system comprises a purification raw material gas input program control valve 10-1, a product raw material gas input program control valve 10-2, a purification gas input program control valve 10-3, a flushing pipeline 4, a product gas output program control valve 10-4, a purification gas output program control valve 10-5, a regeneration gas output program control valve 10-6, a hot blowing program control valve 10-7 and a cold blowing program control valve 10-8, wherein the purification raw material gas input program control valve 10-1 is arranged on a purification raw material gas input pipeline 3, the product raw material gas input program control valve 10-2 is arranged on a product raw material gas input pipeline 2, the regeneration gas output program control valve 10-6 is arranged on a regeneration gas output pipeline 7, the hot blowing program control valve 10-7 is arranged on a hot blowing pipeline 8, and the cold blowing program control valve 10-8 is arranged on a cold blowing pipeline 9.
In order to supply hot purge gas to the hot blowing in the regeneration step of the adsorption tower 1, a heater 12 is provided on the hot blowing line 8; specifically, the heater 12 is located after the thermal blow program control valve 10-7 in the purge gas flow direction.
The system also comprises a cooler 13, a gas-liquid separator 14 and a condensate output pipeline 15. Specifically, along the regeneration gas flow direction, the cooler 13 and the gas-liquid separator 14 are sequentially arranged on the regeneration gas output pipeline 7, and the condensate output pipeline 15 is connected with the gas-liquid separator 14 and is used for discharging the liquid phase separated by the gas-liquid separator 14 to the outside; the cooler 13 is mainly used for cooling the regeneration gas generated in the hot blowing step of the adsorption tower, the gas-liquid separator 14 is used for separating the cooled regeneration gas, the gas phase of the regeneration gas separated by the gas-liquid separator 14 leaves from the top of the gas-liquid separator 14 and is merged into the product raw gas input pipeline 2 through the regeneration gas return pipeline 19, and the gas phase regeneration gas enters the adsorption tower along with the product raw gas for separation and purification; the liquid phase of the regeneration gas separated by the gas-liquid separator 14 enters the condensate outlet line 15 from the bottom of the gas-liquid separator 14 and is discharged to the outside.
In order to control the pressure of the adsorption tower of the system, a pressure regulating valve 16 is arranged on the product gas output pipeline 5 after the product gas output program control valve 10-4 along the flow direction of the product gas.
Example 2
On the basis of example 1, each adsorption column in the present system was subjected to the following steps in sequence during one cycle:
step 1: pre-adsorption (PA)
The purified raw material gas separated from the raw material gas enters an adsorption tower through a purified raw material gas input pipeline to remove impurities to obtain purified gas, and the obtained purified gas is used for regenerating an adsorbent bed in the adsorption tower;
step 2: adsorption (A)
The product raw gas separated from the raw gas enters the adsorption tower through a product raw gas input pipeline, the product raw gas is subjected to impurity removal through an adsorbent bed in the adsorption tower to obtain product gas, and the obtained product gas is discharged out of the room through a product gas output pipeline.
And step 3: regeneration
S1: hot blast (RC)
And (2) outputting the purified gas obtained in the step (1) to an adsorption tower through a purified gas output pipeline, opening a program control valve on a hot blowing pipeline, enabling the purified gas to enter the hot blowing pipeline and be heated by a heater, enabling the heated purified gas to enter the adsorption tower through a flushing pipeline and perform hot blowing on an adsorbent bed layer, enabling impurities adsorbed in the adsorbent bed layer to be desorbed and generating regenerated gas, and enabling the regenerated gas flowing out of the adsorption tower to sequentially pass through a regenerated gas output pipeline and a regenerated gas return pipeline and then to be converged into a product raw material gas input pipeline. The regeneration gas needs to be cooled and separated before entering the regeneration gas return line from the regeneration gas output line.
S2: cold blow (RH)
And (2) outputting the purified gas obtained in the step (1) to an adsorption tower through a purified gas output pipeline, opening a program control valve on a cold blowing pipeline, enabling the purified gas to sequentially enter the adsorption tower through the cold blowing pipeline and a flushing pipeline to cool the adsorbent bed layer subjected to hot blowing, cooling to below 40 ℃ to generate regenerated gas, enabling the formed regenerated gas to sequentially flow out of the adsorption tower, and sequentially converging the regenerated gas into a product raw material gas input pipeline through a regenerated gas output pipeline and a regenerated gas return pipeline.
Example 3
In this example, the system will be described in detail with 3 adsorption columns based on example 1, and table 1 is a table of operation timing of the adsorption columns in the temperature swing adsorption system without loss of purified gas in the case of 3 adsorption columns.
TABLE 1 adsorption tower working time sequence table
Wherein, A is adsorbed, RH is hot blown, RC is cold blown, and PA is pre-adsorbed.
As shown in fig. 1, the temperature swing adsorption system without purified gas loss comprises 3 adsorption towers 1, a product raw gas input pipeline 2, a purified raw gas input pipeline 3, a flushing pipeline 4, a product gas output pipeline 5, a purified gas output pipeline 6, a regeneration gas output pipeline 7, a hot blowing pipeline 8, a cold blowing pipeline 9, a program control valve, a flow regulating valve 11, a regeneration gas return pipeline 19 and a raw gas input pipeline 20.
Specifically, as shown in FIG. 1, in the present embodiment, 3 adsorption columns 1 are arranged in parallel, such as a C-01A adsorption column, a C-01B adsorption column, and a C-01C adsorption column shown in FIG. 1; a product raw material gas input pipeline 2, a purification raw material gas input pipeline 3 and a flushing pipeline 4 are all connected into a C-01A adsorption tower, a C-01B adsorption tower and a C-01C adsorption tower from the tops of the C-01A adsorption tower, the C-01B adsorption tower and the C-01C adsorption tower; a product gas output pipeline 5, a purified gas output pipeline 6 and a regenerated gas output pipeline 7 are connected with the C-01A adsorption tower, the C-01B adsorption tower and the C-01C adsorption tower from the bottoms of the C-01A adsorption tower, the C-01B adsorption tower and the C-01C adsorption tower. The raw material gas input pipeline 20 is communicated with both the product raw material gas input pipeline 2 and the purification raw material gas input pipeline 3, and divides the raw material gas into a purification raw material gas and a product raw material gas, wherein the purification raw material gas enters the purification raw material gas input pipeline 3, and the product raw material gas enters the product raw material gas input pipeline 2. A regeneration gas return line 19 communicates the regeneration gas output line 7 with the product feed gas input line 2.
Specifically, as shown in fig. 1, a hot blow line 8 and a cold blow line 9 communicate the purge gas output line 6 and the purge line 4 and are juxtaposed to each other; in the present embodiment, when the purge gas outlet line 6 and the purge line 4 are communicated by the hot-blow line 8, the adsorption tower is subjected to hot-blowing in the regeneration step at this time; when the cold blowing pipeline 9 connects the purified gas output pipeline 6 with the flushing pipeline 4, cold blowing in the regeneration step is carried out on the adsorption tower at the moment; the regeneration of the adsorption tower is completed after the adsorption tower is sequentially subjected to hot blowing and cold blowing. The program control valves are arranged on a product raw material gas input pipeline 2, a purification raw material gas input pipeline 3, a flushing pipeline 4, a product gas output pipeline 5, a purification gas output pipeline 6, a regeneration gas output pipeline 7, a hot blowing pipeline 8 and a cold blowing pipeline 9. The flow regulating valve 11 is arranged on the product raw material gas input pipeline 2; wherein, along the flow direction of the product raw material gas, a regeneration gas return pipeline 19 is connected to the product raw material gas input pipeline 2 behind the flow regulating valve 11; in the practical process, the product raw material gas is decompressed through the flow regulating valve 11, so that the pressure of the product raw material gas is 10-20 kPa lower than that of the regenerated gas returned from the regenerated gas return pipeline 19, the regenerated gas is converged into the product raw material gas input pipeline 2, and the regenerated gas enters the adsorption tower together with the product raw material gas for separation and purification.
As shown in fig. 1, the program control valves in this embodiment include a purge feed gas input program control valve 10-1, a product feed gas input program control valve 10-2, a purge gas input program control valve 10-3, a product gas output program control valve 10-4, a purge gas output program control valve 10-5, a regeneration gas output program control valve 10-6, a hot-blow program control valve 10-7, and a cold-blow program control valve 10-8; specifically, as shown in fig. 1, a purification raw material gas input program control valve 10-1 is arranged on a purification raw material gas input pipeline 3, and comprises XV03A, XV03B and XV 03C; the product raw material gas input program control valve 10-2 is arranged on a product raw material gas input pipeline 2 and comprises XV01A, XV01B and XV 01C; the purge gas input programmable valve 10-3 is arranged on the flushing pipeline 4 and comprises XV02A, XV02B and XV 02C; the product gas output program control valve 10-4 is arranged on a product gas output pipeline 5 and comprises XV04A, XV04B and XV 04C; the purge gas output programmable valve 10-5 is arranged on a purge gas output pipeline 6 and comprises XV05A, XV05B and XV 05C; the regeneration gas output programmable valve 10-6 is arranged on a regeneration gas output pipeline 7 and comprises XV06A, XV06B and XV 06C; the hot blowing program control valve 10-7 is arranged on the hot blowing pipeline 8, and the cold blowing program control valve 10-8 is arranged on the cold blowing pipeline 9.
As shown in FIG. 1, in order to supply hot purge gas to the hot-blowing step of the adsorption tower 1, a heater 12 for heating the purge gas is provided after the hot-blowing program control valve 10-7 in the flow direction of the purge gas, and the heater 12 is provided on the hot-blowing line 8.
The system also comprises a cooler 13, a gas-liquid separator 14 and a condensate output pipeline 15. Specifically, along the regeneration gas flow direction, the cooler 13 and the gas-liquid separator 14 are sequentially arranged on the regeneration gas output pipeline 7, and the condensate output pipeline 15 is connected with the gas-liquid separator 14 and is used for discharging the liquid phase separated by the gas-liquid separator 14 to the outside; wherein, the cooler 13 is used for cooling the regenerated gas generated in the hot blowing step of the adsorption tower, the gas-liquid separator 14 is used for separating the cooled regenerated gas, the gas-phase regenerated gas separated by the gas-liquid separator 14 is converged into the product raw material gas input pipeline 2 from the regenerated gas return pipeline 19, and enters the adsorption tower along with the product raw material gas for separation and purification; the liquid phase of the regeneration gas separated by the gas-liquid separator 14 is discharged to the outside through a condensate outlet line 15.
In order to control the adsorption pressure of the system, a pressure regulating valve 16 is arranged on the product gas output pipeline 5 after the product gas output program control valve 10-4 along the flow direction of the product gas.
In order to facilitate control of the amount of the purified gas used for regeneration of the adsorption tower, the purified gas input line 3 is provided with a purified raw gas flowmeter 17. Meanwhile, in order to control the flow rate of the raw material gas, a raw material gas flow meter 18 is arranged on the raw material gas input pipeline 20.
Example 4
On the basis of the embodiments 2 and 3, the present embodiment further describes the present invention with the adsorption column C-01A in the adsorption step, the adsorption column C-01B in the pre-adsorption step, and the adsorption column C-01C in the regeneration step.
Step 1: pre-adsorption (PA)
A small part of raw material gas in the raw material gas input pipeline 20 is used as purification raw material gas and enters the purification raw material gas input pipeline 3 through the purification raw material gas flowmeter 17, and the purification raw material gas enters the top of the adsorption tower C-01B from the program control valve XV 03B. The purified raw material gas flows through the adsorption tower C-01B from top to bottom, and impurities in the purified raw material gas are adsorbed on an adsorbent bed layer in the adsorption tower C-01B to obtain purified gas. The resulting purge gas exits from the bottom programmable valve XV05B of the adsorption column C-01B into the purge gas outlet line 6.
Step 2: adsorption (A)
Most of the feed gas in feed gas input line 20 enters product feed gas input line 2 as product feed gas and enters the top of adsorption column C-01A from programmable valve XV01A through flow control valve 11. The product raw gas flows through the adsorption tower C-01A from top to bottom, impurities in the product raw gas are adsorbed on an adsorbent in the adsorption tower C-01A, the obtained product gas enters a product gas output pipeline 5 from a program control valve XV04A at the bottom of the adsorption tower C-01A, and finally is sent out of a battery limit through the product gas output pipeline.
And step 3: regeneration
S1: hot blast (RH)
When the adsorbent bed in the adsorption tower reaches an adsorption saturation state, the adsorbent bed needs to be regenerated by hot blowing through high-temperature purified gas. At this time, on the basis of step 1, the purified gas entering the purified gas output pipeline 6 enters the hot blowing pipeline 8 through the hot blowing program control valve 10-7, and is heated by the heater 12, the heated purified gas enters the flushing pipeline 4, enters the adsorption tower C-01C from the top of the adsorption tower C-01C through the program control valve XV02C, impurities in an adsorbent bed in the adsorption tower C-01C are desorbed under the heating of the purified gas and generate a regenerated gas, the regenerated gas is converged into the regenerated gas output pipeline 7 from the bottom of the adsorption tower C-01C through the program control valve XV06 32, the regenerated gas is cooled to 40 ℃ through the cooler 13, the cooled regenerated gas is subjected to gas-liquid separation in the gas-liquid separator 14, the gas phase is converged into the product raw gas input pipeline 2 through the regenerated gas return pipeline 19, and the liquid phase is sent to the outside through the condensate output pipeline 15 06C.
S2. Cold blow (RC)
The adsorbent bed in the hot-blown adsorption tower needs to be cooled to 40 ℃ to carry out the step 2 adsorption. At this time, on the basis of the step 1, the purified gas entering the purified gas output pipeline 6 enters the cold blowing pipeline 9 through the cold blowing program control valve 10-8, then enters the flushing pipeline 4 and enters the adsorption tower C-01C from the top of the adsorption tower C-01C through the program control valve XV02C, and the purified gas flows through the adsorption tower C-01C from top to bottom to cool the adsorbent bed layer in the adsorption tower C-01C to 40 ℃ and generate regenerated gas. The generated regeneration gas enters the regeneration gas output pipeline 7 through the program control valve XV06C, and the cold-blown regeneration gas does not contain liquid, so the cold-blown regeneration gas is separated from the top of the gas-liquid separator 14 and is merged into the product raw material gas input pipeline 2 through the regeneration gas return pipeline 19.
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solution of the present invention, but not to limit the same, and certainly not to limit the scope of the present invention; while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; that is, the technical problems solved by the present invention are still consistent with the present invention, and all the modifications or colors made in the spirit and the idea of the main design of the present invention are included in the protection scope of the present invention; in addition, will the technical scheme of the utility model direct or indirect application is in other relevant technical field, all including on the same reason the utility model discloses an in the patent protection scope.
Claims (7)
1. A temperature swing adsorption system without purified gas loss comprises an adsorption tower (1), a product raw gas input pipeline (2), a purified raw gas input pipeline (3) and a flushing pipeline (4) which are connected into the adsorption tower, a product gas output pipeline (5), a purified gas output pipeline (6) and a regenerated gas output pipeline (7) which are connected out of the adsorption tower (1), and a raw gas input pipeline (20) which is communicated with the product raw gas input pipeline (2) and the purified raw gas input pipeline (3); the device is characterized by further comprising a regeneration gas return pipeline (19) communicated with the product raw material gas input pipeline (2) and the regeneration gas output pipeline (7), and a flow regulating valve (11) arranged on the product raw material gas input pipeline (2); wherein, along the flow direction of the product raw gas, a flow regulating valve (11) and a regeneration gas return pipeline (19) connected to the product raw gas input pipeline (2) are sequentially arranged on the product raw gas input pipeline (2); the flow regulating valve (11) reduces the pressure of the product raw material gas so that the regenerated gas returned by the regenerated gas return pipeline (19) is converged into the product raw material gas input pipeline (2); the number of the adsorption towers (1) is at least 3.
2. The temperature swing adsorption system without purified gas loss according to claim 1, further comprising a hot blow line (8) and a cold blow line (9) for communicating the purified gas output line (6) and the flush line (4), program control valves being provided on the product raw gas input line (2), the purified raw gas input line (3), the flush line (4), the product gas output line (5), the purified gas output line (6), the regeneration gas output line (7), the hot blow line (8), and the cold blow line (9).
3. The temperature swing adsorption system without purge gas loss of claim 2, wherein the hot blow line (8) is provided with a heater (12) for heating the purge gas.
4. The temperature swing adsorption system without loss of purified gas according to claim 3, further comprising a cooler (13) and a gas-liquid separator (14) provided in the regeneration gas outlet line (7) in the regeneration gas flow direction in this order, and a condensate outlet line (15) connected to the gas-liquid separator (14); wherein, the gas phase of the regenerated gas separated by the gas-liquid separator (14) is converged into the product raw material gas input pipeline (2) by the regenerated gas return pipeline (19), and the liquid phase is conveyed to the outside of the battery limits by the condensate output pipeline (15).
5. The temperature swing adsorption system without loss of purge gas of claim 4, further comprising a pressure regulating valve (16) disposed on the product gas outlet line (5).
6. A clean gas loss-free temperature swing adsorption system according to claim 5, wherein the product feed gas input line (2), the clean feed gas input line (3) and the purge line (4) are all connected from the top of the adsorption tower (1), and the product gas output line (5), the clean gas output line (6) and the regeneration gas output line (7) are all connected from the bottom of the adsorption tower (1).
7. The temperature swing adsorption system without loss of purified gas according to any of claims 1-6, further comprising a raw gas flow meter (18) disposed on the raw gas input line (20), a purified raw gas flow meter (17) disposed on the purified raw gas input line (3); wherein the purification raw material gas flowmeter (17) is associated with the flow regulating valve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120364309.4U CN214635184U (en) | 2021-02-09 | 2021-02-09 | Temperature swing adsorption system without purified gas loss |
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| CN112827317A (en) * | 2021-02-09 | 2021-05-25 | 成都华西化工科技股份有限公司 | Temperature swing adsorption system without purified gas loss and purified gas recovery method |
| CN112827317B (en) * | 2021-02-09 | 2024-04-12 | 成都华西化工科技股份有限公司 | Temperature swing adsorption system without purified gas loss and purified gas recovery method |
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