JP2019122935A - Gas refining apparatus and gas refining method - Google Patents

Abstract

To provide a gas refining apparatus and a gas refining method, capable of utilizing efficiently heat energy of recycled exhaust gas by simple constitution and operation.SOLUTION: A gas refining apparatus 1 for refining gas containing a removal object by a temperature fluctuation adsorption system, includes a recycled exhaust gas line L3 through which recycled exhaust gas flows, which is discharged from an adsorption tower into which regeneration gas is supplied, and further includes an adsorber 5 provided on the recycled exhaust gas line L3, and having an adsorbent for adsorbing the removal object, and a heat exchanger 6 for exchanging heat between gas derived from the adsorber 5 and regeneration gas.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a gas purification apparatus and a gas purification method.

In the production of industrial gas, a thermal swing adsorption (TSA) type gas purification apparatus, that is, a TSA apparatus is known as an apparatus for purifying a gas containing a removal target to obtain a product gas (purified gas). There is.
In a general TSA apparatus, when the adsorbent in the adsorption tower after the gas purification is regenerated, a part of the product gas is heated and supplied as a regeneration gas into the adsorption tower, The object to be removed is desorbed from the adsorbent. With regard to the product gas used for regeneration of the adsorbent in the adsorption tower and discharged from the adsorption tower, that is, regenerated exhaust gas, reuse as a raw material, recovery of useful components, recovery of thermal energy, etc. are considered.
However, when the temperature of the regenerated exhaust gas is low, recovery of thermal energy has less cost advantage. On the other hand, in order to raise the temperature of the regeneration exhaust gas, it is industrially disadvantageous to heat the regeneration gas above the temperature required for the regeneration of the adsorbent in the adsorption tower.

The techniques described in Patent Documents 1 and 2 are known as techniques for recovering thermal energy of exhaust gas discharged from a factory, a power plant or the like. The device described in Patent Document 1 brings exhaust gas containing water vapor into contact with an adsorbent to release water in the adsorbent, cools the exhaust gas with a refrigerant, condenses and removes water vapor in the exhaust gas, and takes out latent heat, leaving residual exhaust gas. A device is provided which adsorbs moisture by an adsorbent and uses a refrigerant used when recovering latent heat as a heat source of another device.
In the method described in Patent Document 2, as a means for cooling the cooling water discharged from the adsorbent heat exchanger of the adsorption type refrigerator, hot water is exchanged using a ground heat exchanger that exchanges the heat of the cooling water with the ground heat. The heat energy of the exhaust gas recovered as is used as the heat source water of the adsorption type refrigerator.

JP-A-8-10550 JP, 2010-249434, A

However, in the device described in Patent Document 1, the configuration of the piping through which the exhaust gas flows is complicated, and the operation of the flow path switching valve is complicated. Due to the complicated construction of the piping, loss of recovered thermal energy is likely to occur, and thermal energy may not be effectively used.
In the method described in Patent Document 2, since the underground heat exchanger is required, piping may be complicated as in the device described in Patent Document 1, and the device may be enlarged.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a gas purification apparatus and a gas purification method that can effectively use the thermal energy of regenerated exhaust gas with a simple configuration and operation.

In order to solve the above-mentioned subject, the present invention comprises the following composition.
[1] A gas purification apparatus comprising a regeneration exhaust gas line through which a gas containing an object to be removed is purified by a temperature fluctuation adsorption method and regeneration exhaust gas discharged from an adsorption tower to which regeneration gas is supplied flows, A gas purification apparatus comprising: an adsorber provided in a line and having an adsorbent for adsorbing an object to be removed; and a heat exchanger for exchanging heat between the gas led out from the adsorber and the regeneration gas. .
[2] The gas purification apparatus according to [1], further comprising a regeneration gas line for supplying regeneration gas to the adsorption tower, wherein the heat exchanger is provided across the regeneration gas line and the regeneration exhaust gas line.
[3] The gas purification device according to [1] or [2], wherein a cooler for cooling the regenerated exhaust gas is provided in the regenerated exhaust gas line.
[4] A temperature fluctuation adsorption type gas purification method using the gas purification device according to any one of [1] to [3], which comprises the object to be removed when the adsorbent in the adsorption tower is regenerated. The exhaust gas is introduced into the adsorber, the object to be removed is adsorbed by the adsorbent in the adsorber, and heat exchange is performed between the gas led out from the adsorber and the regeneration gas to heat the regeneration gas. The regenerated exhaust gas is introduced into the adsorber having the adsorbent on which the object to be removed is adsorbed in the heating step and the heating step, and the object to be removed is desorbed from the adsorbent in the adsorber, And cooling the regenerated gas by exchanging heat between the gas drawn from the adsorber and the regenerated gas.

  According to the present invention, the thermal energy of the regenerated exhaust gas can be effectively utilized by the simple configuration and operation.

It is a schematic diagram which shows an example of a structure of the gas purification apparatus which concerns on one Embodiment to which this invention is applied.

The meanings of the following terms in the present specification are as follows.
The “regeneration” of the adsorbent means that the adsorbent to which the removal target is adsorbed is returned to the state where the removal target can be adsorbed again.
The term "regeneration gas" means a gas supplied to an adsorption tower having an adsorbent to be regenerated to regenerate the adsorbent.
The "regenerated exhaust gas" is a gas discharged from an adsorption tower having an adsorbent to be regenerated, and means a gas used for the regeneration of the adsorbent.

  Hereinafter, a gas purification apparatus and a gas purification method of an embodiment to which the present invention is applied will be described in detail with reference to the drawings. In the drawings used in the following description, in order to make the features easy to understand, the features that are the features may be enlarged and shown for convenience, and the dimensional ratio of each component is limited to be the same as the actual Absent.

<Gas purification device>
First, the structure of the gas purification apparatus 1 which is one Embodiment to which this invention is applied is demonstrated.
FIG. 1 is a schematic view showing an example of the configuration of the gas purification apparatus 1. The gas purification device 1 is a temperature fluctuation adsorption (hereinafter referred to as “TSA”) type device for removing a removal target object from a source gas containing the removal target object to obtain a purified gas.
As shown in FIG. 1, the gas purification apparatus 1 comprises a compressor 2, an adsorption tower 3a, 3b, a heater 4, an adsorber 5, a heat exchanger 6, a supply line L1, a depressurization line L2, a regenerated exhaust gas line L3, and recovery. A line L4, a pressure line L5, a regeneration gas line L6 and a heating line L7 are provided.
Hereinafter, each component of the gas purification device 1 will be described in detail.

  The compressor 2 is not particularly limited as long as the source gas can be compressed. The compressor 2 supplies the compressed source gas to the adsorption towers 3a and 3b through the supply line L1.

  There are no particular limitations on the combination of the source gas, that is, the purified gas and the removal target. For example, air containing at least one member selected from the group consisting of water, nitrogen, nitrous oxide and carbon dioxide as an object to be removed; at least one member selected from the group consisting of carbon dioxide, water, nitrogen and air as an object to be removed Methane gas; hydrogen containing at least one selected from the group consisting of water, carbon dioxide, nitrogen and air as an object to be removed can be mentioned.

  The adsorption towers 3a and 3b have basically the same configuration and are hollow cylindrical, and lower side piping 7a and 7b and upper side piping 8a and 8b are connected to upper and lower ends thereof. The adsorption towers 3a and 3b have an adsorbent inside. The adsorbent is not particularly limited as long as the object to be removed can repeat adsorption and desorption according to the concentration of the object to be removed in the atmosphere in the adsorption towers 3a and 3b and the temperature of the atmosphere. Thus, the adsorption towers 3a and 3b can purify the gas to be removed from the gas containing the material to be removed by adsorbing the material to be removed to the adsorbent.

  The adsorbent is appropriately selected based on the combination with the removal target contained in the source gas. For example, when removing water in air, activated alumina is selected as the adsorbent. For example, when removing carbon dioxide in methane gas, NaX zeolite is selected as the adsorbent. For example, when removing nitrogen in hydrogen, LiX zeolite is selected as an adsorbent.

The supply line L1 is a line for supplying the raw material gas including the object to be removed to the adsorption towers 3a and 3b. The first end of the supply line L1 is connected to the compressor 2, and the second end is branched into a first supply branch line La1 and a second supply branch line Lb1.
The first supply branch line La1 is connected to the lower pipe 7a. A valve Va1 is provided in the first supply branch line La1. The second supply branch line Lb1 is connected to the lower pipe 7b. A valve Vb1 is provided in the second supply branch line Lb1.

  The recovery line L4 is a line for recovering the purified gas from the adsorption towers 3a and 3b. The first end of the recovery line L4 is branched into a first recovery branch line La4 and a second recovery branch line Lb4, and the second end is connected to a storage container (not shown). The first recovery branch line La4 is connected to the upper pipe 8a. The first recovery branch line La4 is provided with a valve Va4. The second recovery branch line Lb4 is connected to the upper pipe 8b. A valve Vb4 is provided in the second recovery branch line Lb4.

The depressurization line L2 is a line for reducing the pressure in the adsorption column and performing a process called depressurization. In the depressurization step, after the object to be removed is adsorbed by the adsorbent in the adsorption tower, the object to be removed is desorbed from the surface of the adsorbent by lowering the pressure in the adsorption tower.
The depressurization line L2 is branched at a first end into a first depressurization branch line La2 and a second depressurization branch line Lb2, and the second end is an open end. The first pressure release branch line La2 is connected to the lower pipe 7a. The first depressurization branch line La2 is provided with a valve Va2. The second depressurization branch line Lb2 is connected to the lower pipe 7b. The second pressure release branch line Lb2 is provided with a valve Vb2.

The regeneration gas line L6 is a line for supplying a part of the purified gas as regeneration gas to the adsorption tower to be regenerated. A first end of the regeneration gas line L6 is branched into a first regeneration gas branch line La6 and a second regeneration gas branch line Lb6 at a branch point r, and a second end is separated from the recovery line L4. It is connected. The first regeneration gas branch line La6 is connected to the upper pipe 8a. The first regeneration gas branch line La6 is provided with a valve Va6. The second regeneration gas branch line Lb6 is connected to the upper pipe 8b. The second regeneration gas branch line Lb6 is provided with a valve Vb6.
In the regeneration gas line L6, the heat exchanger 6 and the valve V7 are provided in this order from the primary side (the upstream side of the regeneration gas). The heat exchanger 6 will be described later.

The heating line L7 is a line for heating the regeneration gas. The heating line L7 has a first end connected to the regeneration gas line L6 at the connection point p, and a second end connected to the regeneration gas line L6 at the connection point q. Here, the connection point p is located between the heat exchanger 6 and the valve V7, the connection point q is located between the valve V7 and the branch point r, and the connection point p is the primary side of the connection point q (regeneration gas Upstream of In the heating line L7, the heater 4 and the valve V8 are provided in this order from the primary side.
The heater 4 is not particularly limited as long as it can heat the regeneration gas flowing through the heating line L7.

The regeneration exhaust gas line L3 is a line for discharging the regeneration exhaust gas. A first end of the regeneration exhaust gas line L3 is branched into a first regeneration exhaust gas branch line La3 and a second regeneration exhaust gas branch line Lb3, and a second end is an opening end. In the regeneration exhaust gas line L3, the adsorber 5 and the heat exchanger 6 are provided in this order from the primary side (the upstream side of the regeneration exhaust gas).
The first regenerated exhaust gas branch line La3 is connected to the lower pipe 7a. A valve Va3 is provided in the first regenerated exhaust gas branch line La3. The second regenerated exhaust gas branch line Lb3 is connected to the lower pipe 7b. A valve Vb3 is provided in the second regenerated exhaust gas branch line Lb3.

  The adsorber 5 has an adsorbent that adsorbs the object to be removed, and the inside is filled with the adsorbent. The adsorbent of the adsorber 5 is configured such that adsorption and desorption of the removal target are repeated according to the concentration of the removal target contained in the regeneration exhaust gas flowing through the regeneration exhaust gas line L3.

  For example, when the concentration of the removal target contained in the regeneration exhaust gas is high, and the removal target can be adsorbed on the surface of the adsorbent possessed by the adsorber 5, if the regeneration exhaust gas flows in the adsorber 5, the adsorbent The object to be removed is adsorbed. Since the adsorption reaction in which the removal target is adsorbed to the adsorbent is an exothermic reaction, heat is generated based on this reaction. As a result, when the regenerated exhaust gas passes through the adsorber 5, thermal energy is generated by the adsorption reaction in the adsorber 5, and the temperature of the gas drawn from the adsorber 5 is increased.

  For example, when the concentration of the object to be removed contained in the regenerated exhaust gas is low and the object to be removed is saturated on the surface of the adsorbent possessed by the adsorber 5, when the regenerated exhaust gas flows into the adsorber 5, An object to be removed is detached. Since the desorption reaction for desorbing the removal target from the adsorbent is an endothermic reaction, cold is generated based on this reaction. As a result, when the regenerated exhaust gas passes through the adsorber 5, thermal energy is consumed in the desorption reaction in the adsorber 5, and the temperature of the gas drawn from the adsorber 5 is lowered.

The heat exchanger 6 can exchange heat between the gas derived from the adsorber 5 of the regeneration exhaust gas line L3 and the regeneration gas flowing on the primary side (upstream side of the regeneration gas) of the connection point p of the regeneration gas line L6. It is not particularly limited as long as it is in the form.
The regeneration exhaust gas line L3 intersects the regeneration gas line L6 at the position of the heat exchanger 6. That is, the heat exchanger 6 is provided at a position where the regeneration exhaust gas line L3 and the regeneration gas line L6 are close to each other. Thus, heat can be exchanged between the gas in the regeneration exhaust gas line L3 and the gas in the regeneration gas line L6 while suppressing the loss of thermal energy.

  For example, when the regeneration gas is supplied to the adsorption tower while being heated by the heater 4 and the regeneration exhaust gas is discharged from the adsorption tower, if the concentration of the object to be removed contained in the regeneration exhaust gas is high, it is derived from the adsorber 5 The heat exchanger 6 can effectively heat the regenerated gas by exchanging heat between the gas and the regenerated gas flowing toward the connection point p.

  For example, when the regeneration gas is supplied to cool the adsorbent in the adsorption tower and the regeneration exhaust gas is discharged from the adsorption tower, if the concentration of the object to be removed contained in the regeneration exhaust gas is low, it is derived from the adsorber 5 The heat exchanger 6 can effectively cool the regeneration gas by exchanging heat between the gas to be regenerated and the regeneration gas flowing toward the connection point p.

The charging line L5 is a line for raising the pressure in the adsorption column to perform a process called charging pressure. In the charging step, after the target substance to be removed is desorbed from the adsorbent in the adsorption tower, the pressure in the adsorption tower is raised to a level suitable for the purification of the source gas.
The first end of the charging line L5 is branched into a first charging branch line La5 and the second charging branch line Lb5, and the second end is connected to the recovery line L4. . The first charge branch line La5 is connected to the upper pipe 8a. The first charging branch line La5 is provided with a valve Va5. The second charge branch line Lb5 is connected to the upper pipe 8b. The second charging branch line Lb5 is provided with a valve Vb5.

(Action effect)
Since the gas purification apparatus 1 described above includes the adsorber 5 and the heat exchanger 6, the heat generated in the adsorber 5 can be used to heat the regeneration gas by the adsorption of the removal target, and the energy required to heat the adsorption tower is Less, ie, the heating efficiency of the adsorption tower is improved. In addition, the refrigeration generated in the adsorber by desorption of the removal target can be used for cooling the regeneration gas, and the cooling efficiency of the adsorption tower is improved.
In addition, since the gas purification apparatus 1 is a simple TSA apparatus that is simple in apparatus configuration, not complicated in piping configuration, and capable of recovering thermal energy in the same apparatus, the thermal energy of the regenerated exhaust gas can be effectively used without waste. It can be recovered, and the recovered thermal energy can be effectively used for regeneration of the adsorbent in the adsorption tower.

<Gas purification method>
Next, an example of the gas purification method of the present embodiment using the above-described gas purification device 1 will be described. In the gas purification method of the present embodiment, the case where the dry air is purified by the TSA method by removing the water from the air containing the water as the removal target is described below as an example.
In the following description, in the gas purification device 1, the regeneration of the adsorbent in the adsorption tower 3a is completed, and the gas purification method is applied in the state where the purification of the gas is completed in the adsorption tower 3b. The case where regeneration of the adsorbent in the adsorption tower 3b is performed while performing purification will be described as an example.

(Adsorption tower 3a: Purification step, adsorption tower 3b: Depressurization step)
First, all the valves shown in FIG. 1 are closed. Thereafter, the valve Va1, the valve Va4, and the valve Vb2 are opened. In this state, the raw material gas compressed from the compressor 2 is supplied to the adsorption tower 3a, and the adsorbent in the adsorption tower 3a adsorbs water to be purified and purified via the first recovery branch line La4 and the recovery line L4. Recover the dry air.
In the adsorption tower 3b, when the valve Vb2 is opened, the pressure in the adsorption tower 3b decreases to near atmospheric pressure. As a result, the water adsorbed by the adsorbent in the adsorption tower 3b is discharged together with the gas in the adsorption tower 3b via the second pressure release branch line Lb2 and the pressure release line L2.
In the purification step, the supply amount of the raw material gas to the adsorption tower 3a is not particularly limited, but can be, for example, 1000 to 50000 Nm ³ / h. Moreover, the time to maintain the valve Va1, the valve Va4, and the valve Vb2 in the open state is not particularly limited, but may be, for example, 2 to 20 minutes.

(Adsorption tower 3a: purification step, adsorption tower 3b: heating step)
Next, the valve Vb2 is closed while the valve Va1 and the valve Va4 are open. Thereafter, the valve Vb3, the valve Vb6 and the valve V8 are opened. In this state, the raw material gas is supplied to the adsorption tower 3a, and while recovering the dry air, a part of the dry air is introduced as the regeneration gas into the heating line L7 via the regeneration gas line L6. The dry air in the heating line L7 is heated by the heater 4 and supplied to the adsorption tower 3b via the second regeneration gas branch line Lb6 and the like. As a result, the temperature in the adsorption tower 3b becomes high, the water adsorbed by the adsorbent is desorbed, and the air having a high water concentration is discharged from the adsorption tower 3b as the regeneration exhaust gas. The regenerated exhaust gas is introduced into the adsorber 5 via the second regenerated exhaust gas branch line Lb3 and the regenerated exhaust gas line L3.

When the regenerated exhaust gas having a high water concentration is introduced to the adsorber 5 in the heating step, the adsorbate in the adsorber 5 adsorbs the moisture, and the adsorber 5 generates thermal energy associated with the adsorption reaction. Therefore, the temperature of the gas derived from the adsorber 5 rises. The heat energy of the gas whose temperature has been raised is recovered by the heat exchanger 6 into the regeneration gas. As a result, the temperature of the regeneration gas before being introduced into the heater 4 becomes high, and the power required for heating can be reduced.
Here, the time for maintaining the valve Va1, the valve Va4, the valve Vb3, the valve Vb6, and the valve V8 in the open state is not particularly limited, but may be, for example, 30 to 180 minutes.
As described above, in the heating step of the adsorption tower 3b, when the adsorbent in the adsorption tower 3b is regenerated, the regenerated exhaust gas containing water is introduced into the adsorber 5, and the water in the adsorbent 5 is adsorbed. And heat exchange between the gas derived from the adsorber 5 and the regeneration gas to heat the regeneration gas.

(Adsorption tower 3a: purification step, adsorption tower 3b: cooling step)
Next, with the valve Va1, the valve Va4, the valve Vb3 and the valve Vb6 open, the valve V8 is closed and the valve V7 is opened. In this state, the raw material gas is supplied to the adsorption tower 3a, and while collecting the dry air, a part of the dry air is introduced into the regeneration gas line L6 as a regeneration gas.
The dry air in the regeneration gas line L6 is supplied to the adsorption tower 3b via the valve V7. Thereby, the inside of adsorption tower 3b is cooled by the dry air introduced via regeneration gas line L6, and the temperature in adsorption tower 3b becomes low. Further, since the cooling process is performed after the heating process, water is desorbed from the adsorbent in the adsorption tower 3b. Therefore, the water concentration of the regenerated exhaust gas discharged from the adsorption tower 3b in the cooling step becomes low. As a result, in the cooling step, the regenerated exhaust gas having a low water concentration is introduced into the adsorber 5 via the second regenerated exhaust gas branch line Lb3 and the regenerated exhaust gas line L3.

When the regenerated exhaust gas having a low water concentration is introduced into the adsorber 5 in the cooling step, moisture is desorbed from the adsorbent in the adsorber 5, and coldness accompanying the desorption reaction is generated in the adsorber 5. Therefore, the temperature of the gas derived from the adsorber 5 is lowered. The heat energy of the gas whose temperature has been reduced is recovered by the heat exchanger 6 into the regeneration gas. As a result, the temperature of the regeneration gas before being introduced into the regeneration gas line L6 decreases. As a result, the cooling efficiency of the adsorption tower 3b is improved, and the amount of regeneration gas required for cooling can be reduced.
Here, the time for maintaining the valve Va1, the valve Va4, the valve Vb3, the valve Vb6, and the valve V7 in the open state is not particularly limited, but can be, for example, 60 to 240 minutes.
As described above, in the cooling step of the adsorption tower 3b, the regenerated exhaust gas is introduced into the adsorber 5 having the adsorbent to which the water is adsorbed in the heating step, and the water is desorbed from the adsorbent in the adsorber 5 Heat exchange between the gas derived from the adsorber 5 and the regeneration gas to cool the regeneration gas.

(Adsorption tower 3a: purification process, adsorption tower 3b: charge pressure process)
Next, with the valve Va1 and the valve Va4 open, the valve Vb3, the valve Vb6 and the valve V7 are closed and the valve Vb5 is opened. In this state, the raw material gas is supplied to the adsorption tower 3a, and while collecting the dry air, a part of the dry air is introduced to the charge pressure line L5 as the charge pressure gas.
The dry air in the charging line L5 is supplied to the adsorption tower 3b via the second charging branch line Lb5 and the like. Thereby, the pressure in the adsorption tower 3b becomes high to a level suitable for the purification of the source gas.
Here, the pressure of the adsorption tower 3b after the charging step is not particularly limited, but can be, for example, 300 to 1000 kPaG. Moreover, the time to maintain the valve Va1, the valve Va4, and the valve Vb5 in the open state is not particularly limited, but can be, for example, 10 to 60 minutes.

  After the depressurization step, the heating step, the cooling step, and the filling step in the adsorption tower 3b described above in order, the regeneration of the adsorbent in the adsorption tower 3b is completed. Next, in the gas purification method of the present embodiment, the valve Va1 and the valve Va4 are closed, and the valve Vb1 and the valve Vb4 are opened, so that the purification process is performed in the adsorption tower 3b and the adsorbent is regenerated in the adsorption tower 3a. Good. Thus, the source gas can be purified by the TSA method by repeatedly performing the purification step and the regeneration of the adsorbent in the adsorption tower between the adsorption tower 3a and the adsorption tower 3b.

(Action effect)
In the gas purification method of the present embodiment described above, since the TSA type gas purification apparatus 1 is used, when the adsorbent in the adsorption tower after purifying the raw material gas is regenerated, the removal object contained in the regenerated exhaust gas The concentration increases immediately after the start of regeneration, and the concentration of the object to be removed gradually decreases.
Therefore, according to the gas purification method of the present embodiment, by continuously supplying the regenerated gas to the adsorption tower after purification, heat and cold generated in the adsorber 5 in the heating step and the cooling step Each can be used in a timely manner. As a result, the adsorption tower can be heated with less energy, and the adsorption tower can be cooled with less regeneration gas.

While some embodiments of the present invention have been described above, the present invention is not limited to such specific embodiments. Furthermore, additions, omissions, substitutions, and other modifications of the configuration may be made within the scope of the present invention as set forth in the claims.
For example, in the embodiment described above, the gas purification apparatus is provided with two adsorption towers, but the number of adsorption towers is not limited to two, and may be one or three or more. May be
In addition, by providing a cooler for cooling the regenerated exhaust gas in the regenerated exhaust gas line, even when the temperature of the regenerated gas becomes excessively high when heating the adsorption tower, the regenerated exhaust gas is cooled in the cooling step, The exchanger 6 may be used to ensure that the regeneration gas can be cooled.

  DESCRIPTION OF SYMBOLS 1 ... Gas purification apparatus, 2 ... Compressor, 3a, 3b ... Adsorption tower, 4 ... Heater, 5 ... Adsorber, 6 ... Heat exchanger, L1 ... Supply line, L2 ... Decompression line, L3 ... Regeneration waste gas line , L4: recovery line, L5: charge pressure line, L6: regeneration gas line, L7: heating line, Va1 to Va6, Vb1 to Vb6, V7, V8: valve

Claims (4)

A gas purification apparatus comprising: a regeneration exhaust gas line in which a gas containing an object to be removed is purified by a temperature fluctuation adsorption method, and regeneration exhaust gas discharged from an adsorption tower supplied with regeneration gas flows;
An adsorber provided in the regenerated exhaust gas line and having an adsorbent that adsorbs a target to be removed;
A heat exchanger that exchanges heat between the gas derived from the adsorber and the regeneration gas;
, Gas purification equipment.   The gas purification device according to claim 1, further comprising a regeneration gas line for supplying regeneration gas to the adsorption tower, wherein the heat exchanger is provided across the regeneration gas line and the regeneration exhaust gas line.   The gas purification device according to claim 1 or 2, wherein a cooler for cooling the regenerated exhaust gas is provided in the regenerated exhaust gas line. It is a gas purification method of the temperature fluctuation adsorption method using the gas purification device according to any one of claims 1 to 3,
When the adsorbent in the adsorption tower is regenerated, the regenerated exhaust gas containing the object to be removed is introduced into the adsorber, the object to be removed is adsorbed by the adsorbent in the adsorber, and the adsorbent is discharged from the adsorber Heating the regenerated gas by exchanging heat between the gaseous substance and the regenerated gas;
The regenerated exhaust gas is introduced into the adsorber having the adsorbent which adsorbs the object to be removed in the heating step, the object to be removed is desorbed from the adsorbent in the adsorber, and the adsorbent is discharged from the adsorber Cooling the regenerated gas by exchanging heat between the gaseous fuel and the regenerated gas;
Gas purification method.

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