CN110917808A - Method and device for removing organic pollutants in casting smoke - Google Patents

Abstract

The invention relates to a method and a device for treating smoke containing macromolecular jelly by an adsorption concentration method. The adsorption bed is divided into a plurality of adsorption sections along the path through which the flue gas passes, and the adsorption sections are communicated in sequence and can be transferred or converted between the adsorption bed and the regeneration device in sequence. The flue gas containing macromolecular jelly continuously passes through the adsorption bed, the flue gas treatment device discharged in the purification process is completed, when the surface of the adsorbent covering the initial section of the macromolecular jelly reaches a certain degree, the adsorption section is separated from the adsorption device, the adsorption section is transferred into a regeneration device for desorption treatment, the adsorption section transferred into the desorption device is completed by conventional temperature desorption treatment, the carbonization regeneration and ashing regeneration are overlapped according to the required frequency on the basis, and the adsorption section completing the regeneration treatment enters the adsorption bed again. The device adopts high-temperature regeneration treatment only for the part of the adsorption bed layer which finishes adsorption, can fully regenerate the adsorbent, saves energy consumption and delays the aging of the adsorbent.

Description

Method and device for removing organic pollutants in casting smoke

Technical Field

The invention relates to a device for separating organic pollution components in smoke.

Background

In the VOCs waste gas treatment field, flue gas generated in the pouring process of a metal casting resin mold has specificity, and the main adverse effect of the flue gas is the stink invasion to plant area workers and the surrounding environment. The existing common treatment process aiming at VOCs or conventional organic malodorous gases has low photocatalysis and low temperature plasma removal efficiency and poor effect. The adsorption effect of the fixed bed or the adsorption rotating wheel is poor due to the complex gas components generating the foul smell. In order to ensure the adsorption effect, a particularly long adsorption process has to be adopted, so that the device counterfeiting cost and the desorption cost are obviously increased, and in addition, the problem that the adsorbent is rapidly failed due to the coverage of macromolecular jelly is also solved. The low-temperature catalytic combustion is difficult to eliminate macromolecular jelly and is easy to cover and lose efficacy, and the direct combustion, the heat accumulation combustion method or the catalytic combustion method has huge air flow, so that the calorific value of combustible gas contained in the flue gas is extremely low, and the fuel consumption is difficult to bear economically. In addition, inflammable condensate accumulation occurs on the flue gas collecting pipeline, and sudden fire is easily caused when the condensate drops on a high-temperature pouring body. The existing solution in the industry is to regularly ignite flammable condensate to burn and remove the flammable condensate under the guarantee of fire protection. The method needs to be stopped, the ventilation equipment is removed in the preparation stage, social fire fighters and equipment are moved in the implementation process, and a large amount of smoke and organic waste gas are generated due to incomplete combustion in the incineration process, so that the method is a remarkable air pollution process.

Disclosure of Invention

The following is an overview of the technical solution of the present invention.

Treating the smoke containing macromolecular jelly by an adsorption concentration method.

The adsorption concentration method adopts staged adsorption beds: the used flue gas treatment device comprises an adsorption bed for treating gas and a regeneration device for regenerating adsorbent, the adsorption bed is divided into a plurality of adsorption sections along a path through which flue gas passes, the adsorption sections are sequentially communicated and can be sequentially transferred or converted between the adsorption bed and the regeneration device, the adsorption section at the flue gas inlet is an initial section, the adsorption section at the flue gas outlet is a final section, the adsorption section at the flue gas inlet of the adsorption bed is an initial end, and the flue gas outlet of the adsorption bed is a final end.

When the macromolecular jelly covers the surface of the adsorbent at the initial section to a certain degree, the adsorption section is separated from the adsorption device and transferred to a desorption device for desorption treatment, and meanwhile, a new adsorption section or a regeneration treatment post-adsorption section is supplemented at the terminal end of the adsorption bed.

The adsorption is completed by conventional temperature desorption treatment, the adsorption section of the desorption device is transferred, and carbonization regeneration and ashing regeneration are superposed according to required frequency on the basis of conventional temperature desorption treatment.

The flue gas is pretreated with a filtration and condensation surface adsorber before entering the adsorbent bed.

The surface adsorber capable of filtering and condensing is arranged at the inlet of the flue gas collecting pipeline.

The filtering and condensing surface adsorber is made of high temperature resistant material.

The flue gas collecting pipeline can be provided with a lining of high-temperature resistant heat insulating material.

The flue gas collecting pipeline is set to be a structure capable of forming an annular pipeline.

The filtering and condensing surface adsorber, the flue gas collecting pipeline and the adsorption bed are treated by combining a common high-temperature desorption method and a controlled carbonization and ashing method to remove macromolecular colloids of condensing and adsorbing.

The technical meaning of the controlled carbonization-ashing method is that the adsorption device, the flue gas collecting pipeline and the adsorption bed on the filtering condensation surface are prevented from being damaged by local high temperature in the treatment process. The practice may be to use a slow warm hot air warm-up or a fast inert gas warm-up in combination with a controlled oxidizing gas delay for slow addition.

The following is a detailed description of the present invention.

The adsorption concentration method is a common method for treating low-concentration large-air-volume VOCs waste gas in the field of waste gas treatment at present, and can be divided into pressure swing adsorption, temperature swing adsorption and combination of the pressure swing adsorption and the temperature swing adsorption according to the working principle. The action process comprises an adsorption process and a desorption process, wherein the adsorbent selectively absorbs VOCs components in the waste gas in the adsorption process and possibly also comprises a small amount of other gas components of partial water vapor components, and other main components in the waste gas are discharged into the atmosphere as purified clean tail gas. During desorption, the adsorbent is heated, typically with hot steam, hot air or hot inert gas, to raise the temperature of the adsorbent and release the VOCs components absorbed during the adsorption process. Typically, the concentrated exhaust gas produced by desorption has a concentration of VOCs that is 10 to 30 times that of the source exhaust gas.

The casting flue gas and similar industrial waste gas to be treated by the invention contain organic matter components with high molecular weight and high boiling point, and can be deposited on the surfaces of adsorbent particles or in large pores in the adsorption process in the form of jelly, so that the adsorption of the adsorbent on small-molecular malodorous gas molecules in the waste gas is prevented. In the desorption process at the normal temperature, the macromolecular high-boiling-point organic matters cannot be completely volatilized and removed. If a higher desorption temperature is used, such as 400-500 ℃ of the carbonization temperature, some of the macromolecular high-boiling-point organic matters can also generate coking or carbon deposition which is more resistant to high temperature, and after a plurality of adsorption and desorption cycles, the accumulation of the coking or carbon deposition components can also cover the surface of the adsorbent and block the pore channels of the adsorbent, so that the adsorption capacity of the adsorbent is seriously reduced.

Coking or soot can be treated with higher ashing temperatures, but higher temperature operation is not supported on existing conventional adsorption concentration units. The equipment is modified by using higher-grade high-temperature resistant materials according to the existing structure, and the manufacturing cost and the operation cost of the equipment are not commercially acceptable.

The casting smoke treatment method and the corresponding device of the invention provide a perfect solution to the problems.

Dividing an adsorption bed for treating gas into a plurality of adsorption sections along a path through which the gas passes, wherein each adsorption section can be transferred or converted between the adsorption bed and a desorption device, the adsorption section at a flue gas inlet is a starting section, the adsorption section at a flue gas outlet is a final section, the flue gas inlet end of the adsorption bed is a starting end, and the flue gas outlet of the adsorption bed is a final end;

when the macromolecular jelly covers the surface of the adsorbent at the initial section to a certain degree, the section of the adsorbent bed is separated from the adsorbent bed, the adsorbent bed is transferred to a desorption device for desorption treatment, and meanwhile, a new or regenerated adsorption section is supplemented at the terminal end of the adsorbent bed.

The expression "to some extent" in the above expression means that if the content of the macromolecular gum in the flue gas entering the adsorption apparatus is high and the content of the small molecule malodorous component is low in a specific application, "to some extent" means that the macromolecular gum covers the adsorbent surface in the initial stage to a greater extent. Conversely, if the amount of the small molecule malodorous component is large and tends to penetrate the entire adsorbent bed when passing through the adsorption apparatus, "to a certain extent" means that the extent to which the macromolecular gum covers the adsorbent surface in the initial stage is controlled to a slight extent.

The desorption treatment comprises conventional temperature desorption and carbonization regeneration and ashing regeneration superposed on the conventional temperature desorption.

The superimposed meaning is to continue raising the temperature to the carbonization temperature or the ashing temperature and holding for the necessary time after completion of the conventional temperature desorption. According to the coking degree of the adsorbent after desorption at the normal temperature, one carbonization regeneration can be superposed after each desorption at the normal temperature or after each desorption at the normal temperature. And in the same way, according to the degree of carbon deposition of the adsorbent after carbonization regeneration, one ashing regeneration is superposed after each carbonization regeneration or each several carbonization regenerations. The carbonization regeneration may be performed in an oxidizing atmosphere or an inert gas atmosphere. Ashing regeneration can only be performed in an oxidizing atmosphere.

The inert gas is non-combustion-supporting gas which comprises nitrogen, carbon dioxide and the like and does not generate oxidation reaction with macromolecular organic matters to cause combustion according to the industrial terminology, and is different from the chemical group 0 element gas such as helium. The carbonization temperature is defined as 350-550 ℃, and the ashing temperature is defined as 550-825 ℃. The adsorbent and associated piping arrangements employed in the adsorbent beds need to withstand the above temperatures. The temperature of the adsorbent bed during operation should be controlled below the tolerance temperature of the adsorbent and associated piping arrangement.

Compared with the existing fixed bed or adsorption rotating wheel which integrally desorbs the whole bed layer of the adsorption bed during desorption, the staged high-temperature desorption method and the corresponding device have the advantages that the high-temperature desorption and the high-temperature regeneration are only carried out on the initial section of the adsorption bed accumulated with more macromolecular organic matters, the volume of the high-temperature resistant part of the treatment device can be reduced, the manufacturing cost of the device is reduced, the fuel consumption is reduced, the high-temperature heating times of the adsorbent can be reduced, and the service life of the adsorbent is relatively prolonged. The macromolecular organic matters are mainly concentrated on the initial section of the adsorption bed in stages at the deposition part of the adsorption bed and are mainly deposited on the surface of the adsorbent, so that the adsorption section firstly adsorbs malodorous gas components which are difficult to adsorb for the adsorbent in the process of moving from the tail end to the initial end of the adsorption bed, and finally utilizes the surface of the adsorption section to adsorb the macromolecular organic matters, thereby fully utilizing the adsorption capacity of adsorbing different malodorous gas components in the flue gas.

In order to reduce macromolecular organic matters entering the adsorption device, a filtering and condensing surface adsorber can be arranged on the flue gas collection pipeline.

The filtering and condensing surface adsorber can be arranged at a pouring operation point generated by the flue gas collecting pipeline aiming at each flue gas and an inlet arranged at the casting cooling and conveying channel. The problem of fire caused by the dropping of macromolecular jelly can be solved. The filtering and condensing surface adsorbers may be provided in two layers, the meaning of which is explained later.

The high-temperature resistant inorganic filtering material and the supporting frame can be used for manufacturing a filtering and condensing surface adsorber, and the filtering material can be stainless steel wires, glass fibers, ceramic fibers and the combination of the stainless steel wires, the glass fibers and the ceramic fibers. Advantages of using such materials include the low tendency to ignite after absorbing macromolecular organics, and the ability to remove the coagulated adsorbed macromolecular gum by a controlled carbonization ashing process. The specific method is that the filtering and condensing surface adsorber is placed in a high temperature resistant closed space and heated by inert high temperature gas, so that macromolecular organic matters adsorbed therein are volatilized and are carried by gas flow to a combustion device to be destroyed, the part which is not easy to volatilize is carbonized at high temperature, then the temperature of the inert high temperature gas is continuously raised, and oxygen components are added into the inert high temperature gas in a controlled manner to remove the residual components of the coked or carbonized macromolecular organic matters in the filter.

In theory, air can also be used in the process, but the temperature rise process is not controlled, so that local temperature rise is easy to cause too fast, local hot spots are formed, macromolecular accumulation spontaneous combustion is caused, and the adsorption device on the filtering and condensing surface, the conveying pipeline and equipment are damaged.

The positive significance of the regeneration furnace of the filtering and condensing surface adsorber is that the replacement cost of the filter and condensing surface adsorber filler and the secondary pollution to the environment can be avoided.

Filtration and coagulation surface adsorbers are easier to understand for the filtration and coagulation of macromolecular gums. After leaving the high temperature environment of the casting mold, the macromolecular organic substance is cooled to a liquid state in the air, wherein a part of the macromolecular organic substance is condensed into smoke droplets which can be seen by naked eyes, the smoke droplets are easily captured in the filtered substance, and the rest exist in micro droplets or dispersed molecules which can not be seen by the naked eyes, and the smoke droplets can easily pass through the filtered substance. The capture of this portion of the macromolecular organic matter by the filtrate requires the affinity of the filtrate surface for these macromolecular organic matter, which is in fact the surface adsorption capacity. The more similar the surface chemistry of the filter material to those of these macromolecular organics, the stronger the surface adsorption capacity. However, in consideration of the regeneration capability of the filtrate, the filtrate cannot be made of organic materials that are not resistant to high temperature. The replacement method relies on slow deposition on the surface of the filter material when the smoke passes through the filter, and the deposition becomes a good adsorption surface when reaching the surface of the filter material. However, when the macromolecular organic substances are excessively deposited, the filtering substances are blocked and the fire is easily caused. The purpose of providing two separable layers or two layers as a filter means is to remove only the surface layer filter means having excessively deposited macromolecular organic matter, to retain the existing deep layer filter means having deposited a proper amount, and to replace them with the surface layer, and to install the new or regenerated filter means at the deep layer filtering position.

Although a filtering and condensing surface adsorber is arranged in the smoke collection, a part of macromolecular organic matters still pass through and are accumulated in the pipeline. In order to prevent the excessive accumulation of the smoke collecting pipeline, the smoke collecting pipeline can be set into a structure capable of forming a ring pipeline, a high-temperature resistant heat-insulating material lining is arranged in the pipe cavity, and macromolecular jelly in the pipeline is removed by a method similar to that of a method for treating a filtering and condensing surface adsorber.

The present invention will be further described with reference to the following examples.

Drawings

FIG. 1 is a schematic structural diagram of a casting flue gas staged adsorption and concentration device.

Fig. 2 shows the matching action of the adsorption section and the movable connecting pipeline interface when the adsorption bed and the desorption device are switched as shown in fig. 1.

FIG. 3 is a schematic structural view of a casting smoke staged adsorption and concentration device provided with a heat recovery device, wherein the casting smoke staged adsorption and concentration device is in a circular ring shape.

Fig. 4 shows another version of the device of fig. 3, a kidney-shaped version.

Fig. 5. yet another version of the device of fig. 3, a rounded triangle.

FIG. 6 is a schematic diagram of a pipeline of a full-flow equipment of the casting smoke treatment device.

FIG. 7 is a schematic diagram showing the operation of the pipeline of the relevant equipment in a normal adsorption operation state of casting fume treatment.

FIG. 8 is a schematic diagram of the operation of the relevant equipment pipeline in the regeneration operation state of the filtering and condensing surface adsorber.

FIG. 9 is a schematic diagram of the operation of the relevant equipment pipeline in the regeneration operation state of the casting fume collection and conveying pipeline.

FIG. 10 is a schematic diagram of the installation and method of use of a filtration and coagulation surface adsorber.

Detailed Description

Example 1The casting flue gas adsorbs the enrichment facility stage by stage.

Referring to fig. 1, the apparatus includes an adsorbent bed C and a regeneration apparatus D. Adsorbent bed C includes a beginning end C1 and an end C2. The adsorption bed C is divided into several separable adsorption sections X, the adsorption section at the beginning is called the beginning section CX1, and the adsorption section at the end is called the end section CX 2. The regeneration device D includes a regeneration end D1 and a concentration end D2. The regeneration unit D of the adsorbent bed C is formed in a ring structure with two notches, and the starting end C1 of the adsorbent bed C is adjacent to the concentrating end D2 of the regeneration unit D. The adsorption segments X forming the ring structure are driven by power to move intermittently in a ring track along the direction indicated by hollow arc central arrow, and the conversion between the regeneration devices D of the adsorption beds C is completed through grouping change.

Referring to fig. 2, a movable connector H for communicating with the pipeline is provided at each of the adsorbent bed C and the regenerator D. When the adsorption section is changed into a group, the movable interfaces H are separated from the connected adsorption beds C and the regeneration devices D and move out of the track position, and the original connection is restored after the adsorption section is completely grouped.

The concept of marshalling is to borrow the mode of operation in which the train is running.

Referring to the attached fig. 1-2, when the device is in operation, flue gas containing VOC enters from the starting end C1 and is discharged from the terminal end C2, high-temperature desorption gas enters from the regeneration end D1 and is discharged from the concentration end D2. The peripheral equipment connected TO the plant, including the source contaminated air transfer line WG, the fan P1, the VOC thermal destruction plant TO, the gas heating plant P2, the desorbed gas supply plant P3 and the flue gas discharge stack P4, is the same as a conventional temperature swing adsorption VOC concentration plant.

Example 2A casting smoke staged adsorption and concentration device provided with a heat recovery device.

Referring to fig. 3-5, in addition to example 1, a heat recovery unit E was added between the final end of adsorption bed C and the regeneration end of regeneration unit D, including a cold end E1 adjacent to the final end C2 of adsorption bed C and a hot end E2 adjacent to the regeneration end D1 of regeneration unit D, also containing a plurality of adsorption stages X. The desorption gas enters a heat recovery device E from a cold end E1, is discharged from a hot end E2, is heated to the desorption temperature by a gas heating device P2, and then enters a regeneration device D. The movement and grouping change of the modified suction section are similar to those of example 1.

The positive effect of example 2 is that the heat contained in the adsorbent in a high temperature state after the completion of desorption can be recovered and the remaining organic contaminant gas can be further washed away in the temperature reduction process.

Fig. 3 illustrates the case of using circular ring track, which has the advantages of simple structure, small moving distance when the adsorption section changes the grouping, and large occupied area and no adjustment.

Fig. 4 illustrates a case of using a oval track, which has advantages that the apparatus is rectangular, area is saved and adjustment is easy, the adsorption section is in a straight barrel shape, it is easy to keep the working air flow uniform, and it has a disadvantage that the moving distance is large when the adsorption section changes the grouping.

Fig. 5 illustrates a case where a rounded triangular track is employed. This type of orbit may be used when the process requires an adsorbent bed C, a desorption device D and a heat recovery device E with substantially the same number of adsorbent sections.

Example 3And (4) setting a full-flow system of the casting smoke treatment device.

Referring to fig. 6, there is shown a full-flow system of a casting fume treatment device arranged in accordance with an on-site model of a foundry for treating fumes generated by resin mold casting. Comprises a setting area of A-area treatment equipment, a collecting pipeline of B-area and a setting area of a filter condensation surface adsorber.

In order to make the system more compact, the casting fume treatment device adopts the simple structure of the embodiment 1, and actually the structure of the embodiment 2 is more practical, and the ordinary skilled person has no difficulty in switching between them in the technical field.

The solid arrows in the figure overlapped with the solid line showing the ventilation line P6 indicate the gas flow direction in the flue gas treatment process, and the hollow arrows parallel to the solid line indicate the high temperature gas flow direction in the high temperature regeneration process for removing the macromolecular organic matter accumulation on the filtering and condensing surface adsorber P5 and the contaminated gas collecting and conveying line P6.

The adsorbers P5 are distributed or clustered at various stations in the casting shop, and a throttle valve P7 is arranged between them and the conveying pipeline P6 for controlling the air flow balance at different positions.

See fig. 7. The conveying pipeline P6 is designed into a double-pipe loop, and when the polluted gas is normally collected and treated, the pipelines are in double-pipe parallel conveying.

Referring to fig. 8, during the high temperature regeneration of the delivery line, the throttle valves P7 and the stop valve P9 between the delivery line and the adsorption concentration device are closed, and the delivery line forms an annular passage. When the regeneration operation is started, the shutoff valve P10, the air source shutoff valve P11, and the oxygen source shutoff valve 12 are closed, the nitrogen source shutoff valve P13 is opened, nitrogen gas enters the pipeline, and air in the pipeline is discharged. The stop valve P10 is opened, and the gas heating furnace P2 is started to heat the whole conveying pipeline.

During the period, nitrogen is continuously added into the pipeline, a throttle valve P8 is controlled, the pressure of the pipeline is controlled, and redundant gas is discharged through a chimney P4 after being treated by a Regenerative Thermal Oxidizer (RTO).

When the temperature of the pipeline is raised to a proper temperature, such as 450-650 ℃, the heat value of the discharged gas is reduced to a safe value, if the RTO self-sustained combustion cannot be maintained, the oxygen source stop valve P12 is opened, oxygen is slowly injected into the pipeline, coking and carbon deposition in the pipeline are removed by oxidation at a high temperature, finally the nitrogen source and the oxygen source heating furnace are closed, the air source stop valve P11 is opened, air is introduced, the pipeline is cooled, and the high-temperature regeneration process of the conveying pipeline can be finished.

Referring to fig. 9, P14 is a regeneration furnace of a filter and agglomeration surface adsorber. The regeneration furnace P14 is a heat-resistant heat-preservation cavity, two ends of the regeneration furnace are connected with a high-temperature regeneration conveying pipeline containing a gas heating furnace P2, the filtering and condensing surface adsorber accumulated with macromolecular organic matters is placed in the cavity, and the filtering and condensing surface adsorber can be regenerated at high temperature by adopting a process similar to the high-temperature regeneration of the conveying pipeline.

Referring to FIG. 10, a cyclic flow process of the filtering and condensing surface adsorber P5 between the filtering and adsorbing location and the regenerator P14 is shown. P7 is throttle valve, P16 is gas collecting hood, and P6 is flue gas conveying pipe.

Claims (10)

1. A method for treating smoke containing macromolecular jelly by using an adsorption concentration method comprises the following conditions and steps:

A. the used flue gas treatment device comprises an adsorption bed for treating gas and a regeneration device for regenerating adsorbent, the adsorption bed is divided into a plurality of adsorption sections along a path through which flue gas passes, the adsorption sections are sequentially communicated and can be sequentially transferred or converted between the adsorption bed and the regeneration device, the adsorption section at the flue gas inlet is an initial section, the adsorption section at the flue gas outlet is a final section, the adsorption section at the flue gas inlet of the adsorption bed is an initial end, and the flue gas outlet of the adsorption bed is a final end;

B. continuously passing the flue gas containing the macromolecular jelly through an adsorption bed, and discharging the flue gas out of a flue gas treatment device after the adsorption and purification process is finished;

C. when the macromolecular jelly covers the surface of the adsorbent at the initial section to a certain degree, separating the adsorption section from the adsorption device, transferring the adsorption section to a regeneration device for desorption treatment, and simultaneously supplementing a new adsorption section or a regeneration treatment-later adsorption section at the final end of the adsorption bed;

D. the adsorption section of the desorption device is transferred to be adsorbed by conventional temperature desorption treatment, and carbonization regeneration and ashing regeneration are superposed according to required frequency on the basis of conventional temperature desorption treatment;

F. the adsorption section which completes the regeneration treatment enters the adsorption bed again.

2. The method for treating flue gas containing macromolecular colloids by using the adsorption concentration method as claimed in claim 2, which is characterized in that a step E is added between the steps D and F, and the specific contents are as follows: and D, leading the regeneration gas to pass through the adsorption section which finishes regeneration and is in a high-temperature state, then passing through a gas heating device, raising the temperature of the gas to the treatment temperature used in the step D, and then entering the regeneration device.

3. A flue gas purification device for treating macromolecular jelly by using an adsorption concentration method comprises an adsorption bed for treating gas and a regeneration device for regenerating an adsorbent, wherein the adsorption bed is divided into a plurality of adsorption sections along a path through which flue gas passes, the adsorption sections are sequentially communicated and can be sequentially transferred or converted between the adsorption bed and the regeneration device, the adsorption section at the flue gas inlet is an initial section, the adsorption section at the flue gas outlet is a final section, the flue gas inlet end of the adsorption bed is an initial end, and the flue gas outlet of the adsorption bed is a final end.

4. The flue gas purification apparatus according to claim 3, further comprising a heat recovery device, wherein the adsorption section is capable of being sequentially transferred or switched among the adsorption bed, the regeneration device and the heat recovery device, and the regeneration gas is first passed through the adsorption section where the regeneration is completed at a high temperature and then passed through the regeneration gas heater to raise the temperature to a temperature for the regeneration treatment.

5. The flue gas purification device according to claim 4, wherein at least one of the regeneration device and the heat recovery device comprises two or more adsorption sections, the regeneration device comprises a regeneration end and a concentration end, the heat recovery device comprises a cold end and a hot end, and the regeneration gas enters the flue gas treatment device and passes through the regeneration device and the heat recovery device in the order of the cold end of the heat recovery device, the hot end of the heat recovery device, the regeneration gas heater, the regeneration end of the regeneration device and the concentration end of the regeneration device and then is discharged.

6. The flue gas purification device according to claim 5, wherein the adsorption sections of the adsorption beds, the regenerator heat recovery unit and the regeneration unit are arranged in groups or independently and driven by power to move in a unidirectional intermittent manner along a closed track, the adsorption beds, the regenerator heat recovery unit and the regeneration unit are respectively arranged in groups, and the conversion of the adsorption sections among the adsorption beds, the regenerator heat recovery unit and the regeneration unit is completed by changing the groups.

7. The flue gas purification device according to claim 6, wherein the closed orbit is one of a circular shape, a waist circular shape and a rounded triangle.

8. The flue gas purification device according to claim 6, further comprising a filtering and condensing surface adsorber in communication with the adsorption bed, wherein the flue gas is pretreated by the filtering and condensing surface adsorber and then enters the adsorption bed.

9. The flue gas purification apparatus according to claim 8, wherein the filtering and condensing surface adsorber is disposed at the inlet of the flue gas collecting pipe, the filtering and condensing surface adsorber is made of a high temperature resistant material, the flue gas collecting pipe may be lined with a high temperature resistant heat insulating material, the flue gas collecting pipe is configured to form a circular pipe, and the filtering and condensing surface adsorber, the flue gas collecting pipe and the adsorbent bed may be treated by controlled carbonization and ashing to remove the large molecular gel adsorbed by the condensing surface adsorber.

10. The flue gas purification device according to claim 4, wherein the filtering and condensing surface adsorber is divided into two or more independent layers.

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