Partitioned staggered incineration flue gas treatment device

Abstract

According to the partitioned staggered incineration flue gas treatment device, the adsorbent fixing plate and the gas staggered distribution plate are arranged in the adsorption box shell, a plurality of closed gas channels are constructed, staggered flowing of incineration flue gas on the two sides of the adsorbent fixing plate is achieved, the adsorption area is effectively increased under the same volume, and the adsorption efficiency is improved. The adsorbent utilization rate is improved. By arranging the adsorbent zoning insertion plate, the adsorbent layer is independently zoned according to the distance from the adsorbent layer to the gas inlet, so that the adsorbent close to the gas inlet area and the adsorbent close to the gas outlet area can be independently replaced, the contact surface of the adsorbent can be adjusted in the replacement process, and the utilization rate of the adsorbent is further improved; and the output of secondary wastes is reduced. In addition, different types of adsorbents can be loaded in different areas of the adsorbent fixing plate by additionally arranging the adsorbent partition inserting plate, when incineration flue gas contains multi-component harmful gas, synchronous adsorption of the multiple harmful gas can be achieved, and the tail gas treatment efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of radioactive waste treatment, and particularly relates to a partition staggered type incineration flue gas treatment device. BACKGROUND

[0002] Incineration is a common method for treating radioactive solid waste, and the removal of acid gases in incineration flue gas is very critical. Dry adsorbent is used for acid gas removal, which has the advantage of not producing waste liquid, and only needs to be replaced regularly. The position of the adsorbent layer directly affects the utilization efficiency of the adsorbent layer and the replacement frequency. The common setting methods of the adsorbent layer are parallel setting and series setting, and the basic component unit of both is a single-layer integral adsorbent layer. When the length of the adsorbent layer is large, there is a problem of uneven utilization of adsorbent in different areas. Generally, the utilization rate of adsorbent near the gas inlet position is high, while the utilization rate of adsorbent near the gas outlet position is low. When the adsorbent near the gas inlet position fails, the entire adsorbent layer needs to be replaced, which increases the amount of secondary waste. Therefore, it is urgent to develop a new type of incineration flue gas treatment device to solve the problems of uneven utilization and low utilization rate of adsorbent in the existing incineration flue gas treatment device. SUMMARY

[0003] In order to solve the above technical problems, the present application provides a partition staggered type incineration flue gas treatment device, which constructs a closed gas channel by setting adsorbent fixing plates and gas staggered distribution plates in the device, realizes the staggered flow of incineration flue gas, and by adding adsorbent partition plates, the adsorbent layer is independently partitioned according to the distance from the gas inlet position, the adsorbent in different areas of the adsorbent fixing plate can be replaced respectively, and the adjustment of the adsorbent contact surface can be realized during the replacement process, thereby effectively improving the utilization rate of the adsorbent.

[0004] The present application discloses a partition staggered type incineration flue gas treatment device, which comprises an adsorption box shell, adsorbent fixing plates and gas staggered distribution plates. The adsorption box shell is a sealed shell, and the shell is provided with a gas inlet and a gas outlet at both ends; the adsorbent fixing plates are arranged inside the adsorption box shell along the direction from the gas inlet to the gas outlet, and divide the inside of the adsorption box shell into multiple gas channels, and the adsorbent fixing plates are used for fixing the granular solid adsorbent to form an adsorbent layer; The gas staggered distribution plate is a perforated plate located in the adsorption box shell, the outer peripheral area of the gas staggered distribution plate is the same as the cross-sectional area of the inner cavity of the adsorption box shell, and the gas staggered distribution plate comprises an inlet gas staggered distribution plate and an outlet gas staggered distribution plate, which are respectively arranged vertically and in close contact with the two ends of the adsorbent fixing plate, wherein the perforation positions of the inlet gas staggered distribution plate and the outlet gas staggered distribution plate are staggered, so that the gas entering the gas channel through the perforation of the inlet gas staggered distribution plate must pass through the adsorbent layer and enter the adjacent gas channel, and then flow out through the perforation of the outlet gas staggered distribution plate.

[0005] Further, the adsorbent fixing plate is provided with at least two.

[0006] Further, the adsorbent fixing plate divides the inner part of the adsorption box shell into a plurality of equally spaced gas channels.

[0007] Further, the adsorbent fixing plate is a perforated plate.

[0008] Further, when the perforation positions of the inlet gas staggered distribution plate correspond to all odd-numbered channels in the gas channels, the perforation positions of the outlet gas staggered distribution plate correspond to all even-numbered channels in the gas channels; when the perforation positions of the inlet gas staggered distribution plate correspond to all even-numbered channels in the gas channels, the perforation positions of the outlet gas staggered distribution plate correspond to all odd-numbered channels in the gas channels.

[0009] Further, the area of the perforation is not less than the cross-sectional area of the corresponding gas channel.

[0010] Further, the device further comprises an adsorbent partition plug-in plate, which is a perforated plate with a hole size smaller than the size of the adsorbent particles, and can be inserted into the adsorption box shell in a direction perpendicular to the adsorbent fixing plate, for dividing each adsorbent fixing plate into a plurality of independent areas.

[0011] Further, the plurality of independent areas are used for fixing different kinds of solid adsorbents.

[0012] Further, the adsorbent partition plug-in plate can realize the separate replacement of the solid adsorbents in the plurality of independent areas.

[0013] Further, the adsorbent partition plug-in plate can be inserted into different positions of the adsorption box shell.

[0014] The application provides a partition staggered incineration flue gas treatment device, which can effectively improve the utilization rate of adsorbent and reduce the amount of secondary waste. (1) By setting an adsorbent fixing plate and a gas cross-distribution plate in the device, the present invention constructs multiple closed gas channels, realizing the cross-flow of combustion flue gas on both sides of the adsorbent fixing plate. The gas entering the gas channel from the gas inlet must pass through the adsorbent fixing plates on the left and right sides and enter the adjacent gas channels on the left and right sides before it can flow out from the gas outlet. Therefore, the number of times the combustion flue gas cross-passes through the adsorbent layer is increased, effectively increasing the adsorption area under the same volume and improving the adsorbent utilization rate.

[0015] (2) By adding an adsorbent partition plate, the adsorbent layer is divided into independent partitions according to the distance from the gas inlet. This allows the adsorbent in the area near the gas inlet and the area near the gas inlet in the adsorbent fixing plate to be replaced separately, realizing the individual replacement of the adsorbent in the area near the gas inlet. Moreover, the contact surface of the adsorbent in the area near the gas inlet can be adjusted during the replacement process, thereby effectively improving the adsorbent utilization rate and reducing the amount of secondary waste generated.

[0016] (3) By adding an adsorbent partition plate, different types of adsorbents can be loaded in different areas of the same adsorbent fixing plate. When the flue gas contains multiple harmful gases, multiple harmful gases can be adsorbed simultaneously, avoiding multi-step adsorption in tail gas treatment and effectively improving the removal efficiency of tail gas treatment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the partitioned staggered incineration flue gas treatment device of the present invention.

[0019] Figure 2 This is a schematic diagram of the inlet staggered distribution plate and its corresponding outlet staggered distribution plate of the present invention.

[0020] Figure 3 This is a schematic diagram of the partitioned staggered incineration flue gas treatment device with adsorption and deacidification functions of the present invention.

[0021] Figure 4 This is a schematic diagram of the partitioned staggered incineration flue gas treatment device of the present invention with uneven partitioning.

[0022] Explanation of reference numerals in the attached figures: 1. Adsorption box shell, 2. Adsorbent fixing plate, 3. Gas cross-distribution plate, 4. Gas inlet, 5. Gas outlet, 6. Gas channel, 7. Adsorbent layer, 8. Inlet cross-distribution plate, 9. Outlet cross-distribution plate, 10. Opening, 11. Opening, 12. Adsorbent partition plate. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] Unless otherwise specified, the preferred embodiments of the present invention can be freely combined as needed. Those skilled in the art will understand that the data and various parameters described in the embodiments are merely exemplary and do not constitute a limitation of the present invention. The chemical substances and equipment used in the following embodiments are all materials and equipment known in the art, and all materials and equipment used in the present invention are commercially available.

[0025] This invention provides a zoned, staggered incineration flue gas treatment device, comprising an adsorption box shell 1, an adsorbent fixing plate 2, and a gas staggered distribution plate 3. The device structure is as follows: Figure 1 As shown, the arrows indicate the flow direction of the incineration flue gas within the device.

[0026] The adsorption box shell 1 of the present invention is a sealed shell used to accommodate and support the internal structure and materials. Gas inlet 4 and gas outlet 5 are respectively provided at both ends of the shell.

[0027] In this invention, the adsorbent fixing plate 2 is disposed inside the adsorption chamber shell 1 along the direction from the gas inlet 4 to the gas outlet 5, dividing the interior of the adsorption chamber shell 1 into multiple gas channels 6, which are preferably equally spaced. The wider the gas channel, the greater the gas flow rate and the higher the adsorbent utilization rate on both sides of the gas channel; conversely, the narrower the gas channel, the smaller the gas flow rate and the lower the adsorbent utilization rate on both sides of the gas channel. To reduce the problem of uneven adsorbent utilization caused by different gas flow rates, it is preferable to arrange the gas channels at equal intervals. The adsorbent fixing plate 2 of this invention is a porous plate used to fix particulate solid adsorbent to form an adsorbent layer 7. Preferably, at least two adsorbent fixing plates 2 are provided. Providing multiple adsorbent fixing plates 2 not only increases the adsorbent loading capacity but also increases the number of gas channels 6, allowing the flue gas to pass through more adsorbent layers 7 before flowing out of the adsorption chamber shell 1, thereby improving the flue gas treatment efficiency.

[0028] The gas staggered distribution plate 3 of the present invention is an open plate located inside the adsorption box shell 1. The outer peripheral area of ​​the gas staggered distribution plate 3 is the same as the cross-sectional area of ​​the inner cavity of the adsorption box shell 1. It includes an inlet staggered distribution plate 8 and an outlet staggered distribution plate 9, which are respectively perpendicularly attached to both ends of the adsorbent fixing plate 2. The positions of the openings 10 of the inlet staggered distribution plate 8 and the openings 11 of the outlet staggered distribution plate 9 are staggered, so that the gas entering the gas channel 6 through the openings 10 of the inlet staggered distribution plate 8 must pass through the adsorbent layer 7, enter the adjacent gas channel, and flow out through the openings 11 of the outlet staggered distribution plate 9. Preferably, when the position of the opening 10 of the inlet staggered distribution plate 8 corresponds to all the odd-numbered channels in the gas channel 6, the position of the opening 11 of the outlet staggered distribution plate 9 corresponds to all the even-numbered channels in the gas channel 6; when the position of the opening 10 of the inlet staggered distribution plate 8 corresponds to all the even-numbered channels in the gas channel 6, the position of the opening 11 of the outlet staggered distribution plate 9 corresponds to all the odd-numbered channels in the gas channel 6. To avoid the inlet staggered distribution plate 8 and the outlet staggered distribution plate 9 obstructing the gas flow in and out of the gas channel 6, the area of ​​the openings 10 and 11 should be designed to be not less than the cross-sectional area of ​​the corresponding gas channel 6, and preferably the same as the cross-sectional area of ​​the corresponding gas channel 6. Of course, if the gas channels 6 are equally spaced, the areas of the openings 10 and 11 are all the same size.

[0029] Through the above structural design, the incineration flue gas can pass through the adsorbent layers 7 on both sides in the device of the present invention and flow out from the adjacent gas channel 6, which effectively increases the adsorption area under the same volume, and improves the adsorbent utilization rate and flue gas treatment efficiency.

[0030] The device of the present invention may further include an adsorbent partition plate 12, which is a porous plate with an aperture size smaller than that of the adsorbent particles. It can be inserted into the adsorption box housing 1 in a direction perpendicular to the adsorbent fixing plate 2, dividing each adsorbent fixing plate 2 into multiple independent areas, thereby enabling individual replacement of the solid adsorbent in each area. The user can replace the adsorbent on one or both sides of the adsorbent partition plate 12. When only one side of the adsorbent needs to be replaced, the adsorbent can be transferred to the other side for replenishment. This transfer action causes the adsorbent particles to roll and move, thereby adjusting the surface position of the old adsorbent. In subsequent flue gas treatment, the new surface of the adsorbent particles can be used for adsorption, further promoting the utilization rate of the adsorbent.

[0031] When the flue gas contains multiple harmful substances, multiple independent zones can be used to fix different types of solid adsorbents. For example, resin adsorbents can be loaded in the zone near the gas inlet, and SDG adsorbents can be loaded in the zone near the gas outlet. This allows for the simultaneous adsorption and deacidification of volatile organic compounds and acidic gases without the need for the two-step adsorption and deacidification process required by existing technologies. This not only improves the flue gas treatment efficiency but also saves at least one flue gas treatment device.

[0032] Furthermore, due to the unique location of gas inlet 4, the adsorbent layer near gas inlet 4 becomes contaminated more quickly, requiring frequent replacement of the adsorbent material in this area. Conversely, the adsorbent layer near gas outlet 5 becomes contaminated more slowly, requiring less frequent replacement. Therefore, this invention preferably uses a movable adsorbent partition plate 12, which can be flexibly inserted into different positions on the adsorption chamber shell 1 as needed, and the state of each partition can be adjusted at any time. For a single type of adsorbent layer, the adsorbent partition plate 12 is preferably positioned closer to gas inlet 4, and the replacement frequency of the adsorbent material in the area near gas inlet 4 is appropriately increased. This not only reduces the amount of secondary waste generated but also further improves the adsorbent utilization rate, allowing the adsorbent material in the area near gas outlet 5 to be replaced only after a longer period of use.

[0033] The present invention will now be described in more detail with reference to exemplary embodiments. The following embodiments or experimental data are intended to illustrate the present invention by way of example, and those skilled in the art should understand that the present invention is not limited to these embodiments or experimental data.

[0034] Example 1 A zoned staggered incineration flue gas treatment device comprises an adsorption box shell 1, an adsorbent fixing plate 2, a gas staggered distribution plate 3, and an adsorbent zone insert plate 12, as shown below. Figure 1 As shown.

[0035] The adsorption box shell 1 is a sealed shell, with a gas inlet 4 and a gas outlet 5 at each end.

[0036] Along the direction from gas inlet 4 to gas outlet 5, six adsorbent fixing plates 2 are installed inside the adsorption chamber shell 1, dividing the interior of the adsorption chamber shell 1 into seven equally spaced gas channels 6. The adsorbent fixing plates 2 are porous plates used to fix particulate solid adsorbent to form an adsorbent layer 7.

[0037] A gas cross-distribution plate 3 is provided inside the adsorption box shell 1. The outer circumferential area of ​​the gas cross-distribution plate 3 is the same as the cross-sectional area of ​​the inner cavity of the adsorption box shell 1. It includes an inlet cross-distribution plate 8 and an outlet cross-distribution plate 9, which are perpendicularly attached to both ends of the adsorbent fixing plate 2, respectively.

[0038] Figure 1 The cross-sectional views at positions A and B in the device are as follows Figure 2 Section A and section B, as shown Figure 2 As shown, the inlet staggered distribution plate 8 has three openings 10, corresponding to the 2nd, 4th, and 6th gas channels; the outlet staggered distribution plate 9 has four openings 11, corresponding to the 1st, 3rd, 5th, and 7th gas channels. The openings 10 on the inlet staggered distribution plate 8 and the openings 11 on the outlet staggered distribution plate 9 are staggered, ensuring that gas entering the gas channel 6 through the openings 10 on the inlet staggered distribution plate 8 must pass through the adsorbent layer 7, enter the adjacent gas channel, and exit through the openings 11 on the outlet staggered distribution plate 9. Figure 1 As shown, the areas of openings 10 and 11 are the same as the cross-sectional area of ​​each gas channel 6.

[0039] The adsorbent partition plate 12 is a porous plate with an opening size smaller than that of the adsorbent particles. It is inserted into the middle of the adsorption box shell 1 along the direction perpendicular to the adsorbent fixing plate 2, dividing each adsorbent fixing plate 2 into two independent areas, thereby enabling the solid adsorbent in the two independent areas to be replaced individually.

[0040] Example 2 This embodiment has the same device structure as Embodiment 1, the difference being that the adsorbent fixing plate 2 is loaded with two types of adsorbents: SDG adsorbent and resin adsorbent. Figure 3 As shown in the diagram, specifically, the adsorbent partition plate 12 divides each adsorbent fixing plate 2 into two independent areas. The area near the gas inlet is loaded with resin adsorbent to absorb volatile organic compounds in the incineration flue gas, while the area near the gas outlet is loaded with SDG adsorbent to absorb acidic gases in the incineration flue gas. Using the partitioned staggered incineration flue gas treatment device of this embodiment, the adsorption and deacidification treatment of incineration flue gas can be completed in one step, eliminating the need to separate the adsorption and deacidification processes according to existing technologies, thus improving adsorbent utilization and incineration flue gas treatment efficiency.

[0041] Furthermore, in this embodiment, due to the high concentration of volatile organic compounds in the incineration flue gas, the resin adsorbent will fail first, while the SDG adsorbent has not yet failed. Therefore, in actual operation, the resin adsorbent is replaced first, and the SDG adsorbent is replaced separately only after it is nearing failure.

[0042] Example 3 The device structure in this embodiment is exactly the same as that in Embodiment 1, the difference being the position of the adsorbent partition plate 12, such as... Figure 4As shown. Specifically, due to the unique location of gas inlet 4, the adsorbent near gas inlet 4 comes into contact with the combustion flue gas first, and the contact amount is also the highest. Therefore, the adsorbent layer 7 near gas inlet 4 will fail first, while the adsorbent layer 7 near gas outlet 5 can still effectively adsorb harmful substances in the combustion flue gas. Therefore, an adsorbent partition plate 12 is inserted into the adsorbent fixing plate 2 at a one-quarter distance from gas inlet 4, dividing the adsorbent fixing plate 2 into a region near gas inlet 4 and a region near gas outlet 5. The region near gas inlet 4 occupies one-quarter of the entire adsorbent fixing plate 2. In actual operation, when the adsorbent needs to be replaced, only the adsorbent in the region near gas inlet 4 of the adsorbent fixing plate 2 needs to be replaced first.

[0043] The specific process for replacing the adsorbent is as follows: the adsorbent near the gas inlet 4 area is removed, a portion of the adsorbent near the gas outlet 5 area is transferred to the area near the gas inlet 4 area, and then new adsorbent is loaded into the area near the gas outlet 5 area. During this transfer, the old adsorbent undergoes a readjustment of its contact surface with the flue gas. This not only improves the adsorbent utilization rate but also reduces the generation of secondary waste such as depleted adsorbent.

[0044] The materials and equipment used in this invention are all commercially available. The above description is only a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A partitioned staggered incineration flue gas treatment device, characterized by, The device comprises an adsorption box shell, an adsorbent fixing plate and a gas staggered distribution plate. The adsorption box shell is a sealed shell, and a gas inlet and a gas outlet are arranged at two ends of the shell respectively; the adsorbent fixing plate is arranged inside the adsorption box shell along the direction from the gas inlet to the gas outlet, and divides the inside of the adsorption box shell into a plurality of gas channels; the adsorbent fixing plate is used for fixing the granular solid adsorbent to form an adsorbent layer. The gas staggered distribution plate is a perforated plate located inside the adsorption box shell, and the outer peripheral area of the gas staggered distribution plate is the same as the cross-sectional area of the inner cavity of the adsorption box shell; the gas staggered distribution plate comprises an inlet gas staggered distribution plate and an outlet gas staggered distribution plate, and is arranged in vertical contact with the two ends of the adsorbent fixing plate respectively; wherein, the perforation positions of the inlet gas staggered distribution plate and the outlet gas staggered distribution plate are staggered, so that the gas entering the gas channel through the perforation of the inlet gas staggered distribution plate must pass through the adsorbent layer and enter the adjacent gas channel, and then flow out through the perforation of the outlet gas staggered distribution plate.

2. The zone staggered incineration flue gas treatment apparatus according to claim 1, characterized by, The adsorbent fixing plate is provided with at least two.

3. The zone staggered incineration flue gas treatment apparatus according to claim 1, characterized by, The adsorbent fixing plate divides the inside of the adsorption box shell into a plurality of equidistant gas channels.

4. The zone staggered incinerator flue gas treatment apparatus according to claim 1, characterized by, The adsorbent fixing plate is a porous plate.

5. The zone staggered incinerator flue gas treatment device of claim 1, wherein When the perforation positions of the inlet gas staggered distribution plate correspond to all odd-numbered channels in the gas channels, the perforation positions of the outlet gas staggered distribution plate correspond to all even-numbered channels in the gas channels; when the perforation positions of the inlet gas staggered distribution plate correspond to all even-numbered channels in the gas channels, the perforation positions of the outlet gas staggered distribution plate correspond to all odd-numbered channels in the gas channels.

6. The zoned staggered incinerator flue gas treatment device of claim 5, wherein, The area of the perforation is not less than the cross-sectional area of the corresponding gas channel.

7. The zone staggered incinerator flue gas treatment apparatus according to claim 1, wherein The device further comprises an adsorbent partition plug-in plate, which is a porous plate with a perforation size smaller than the size of the adsorbent particles, and can be inserted into the adsorption box shell in a direction perpendicular to the adsorbent fixing plate, and is used for dividing each adsorbent fixing plate into a plurality of independent areas.

8. The zoned staggered incinerator flue gas treatment device of claim 7, wherein, The plurality of independent areas are used for fixing different kinds of solid adsorbents.

9. The zoned staggered incinerator flue gas treatment device of claim 7, wherein, The adsorbent partition plug-in plate can realize the separate replacement of the solid adsorbents in the plurality of independent areas.

10. The zoned staggered incinerator flue gas treatment device of claim 7, wherein, The adsorbent partition plug-in plate can be movably inserted into different positions of the adsorption box shell.

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