Chain array exhaust gas adsorption concentration device

Abstract

This invention relates to a gas adsorption concentration device, and more particularly to a waste gas treatment device for concentrating volatile organic pollutants by adsorption, comprising an adsorption section and a regeneration section. The adsorption section is equipped with multiple parallel adsorption modules, each comprising a multi-layered adsorption unit. Functionally, each adsorption unit is a fixed adsorption bed. When waste gas passes through an adsorption module, pollutants are adsorbed and purified by the adsorbent within the adsorption unit before being discharged. The regeneration section is equipped with one or more desorption modules comprising multi-layered, stacked adsorption units. When desorbed gas passes through a desorption module, pollutants within the adsorption unit are desorbed and carried out by the desorbed gas, achieving waste gas concentration and regenerating the adsorbent. Adsorption units are transferred between the adsorption and regeneration sections via a mechanical device and circulate orderly during adsorption and desorption processes. This invention can adapt to significant changes in the flow rate and concentration of the target gas by adjusting the circulation cycle of the adsorption units throughout the device and the desorption airflow of the desorption modules, effectively solving the problems of high air resistance in adsorption operations and low efficiency in desorption operations in high-flow-rate gas adsorption concentration devices.

Description

Technical Field

[0001] This invention relates to a gas adsorption and concentration device, and further to a waste gas treatment device that uses adsorption to concentrate volatile organic pollutants. Background Technology

[0002] "Air velocity" is technically borrowed from the chemical field as a metric for the efficiency of catalytic reactions. It refers to the amount of gas processed per unit volume of catalyst per unit time under specified conditions. In the environmental field, the catalyst is replaced by an adsorbent, and the unit is usually m. 3 / (m 3 The catalyst (h) can be simplified to h -1 .

[0003] In high-flow-rate fixed-bed gas adsorption and concentration devices, the air resistance of the adsorption bed is a significant factor affecting the overall system energy consumption. Reducing the thickness of the adsorption bed and decreasing the airflow velocity while maintaining a certain space velocity can significantly reduce the air resistance of the adsorption bed, while still ensuring removal efficiency.

[0004] Patent document CN110013736A discloses an adsorption separation device comprising three functional processing modules: an adsorption sequence, a desorption sequence, and a thermal regeneration sequence, each composed of multiple adsorption units. This device can achieve extremely high removal efficiency, extremely high pollutant concentration ratio, and maximum thermal utilization efficiency in the temperature-switching adsorption process for pollutants. Summary of the Invention

[0005] In the background technology, the adsorption, desorption, and thermal regeneration sequences are arranged in a single series within the ordered flow of the adsorption unit. In practical applications, because the adsorbate concentration is typically very low, the ratio of adsorbed gas flow rate to desorbed gas flow rate is usually in the tens to hundreds, or even thousands, which is precisely the technical advantage of this device's high concentration ratio. To achieve a high concentration ratio and flow balance among the adsorption units in each adsorption functional module, desorption and thermal regeneration can only operate inefficiently at extremely low flow rates. The high air volume and velocity of the adsorption functional modules exacerbate the high air resistance problem. The number of adsorption units distributed in the adsorption, desorption, and thermal regeneration sequences is roughly the same, resulting in extremely low resource utilization in the desorption and thermal regeneration sequences.

[0006] This invention solves the above problems through a unique mechanical structure.

[0007] This invention discloses a composite array structure gas adsorption and concentration device, which effectively solves the problems of high wind resistance in adsorption operation and low working efficiency in desorption and regeneration operation of large flow gas adsorption and concentration devices.

[0008] See appendix Figure 1-6This gas adsorption and concentration device includes an adsorption section 1 and a regeneration section 2. The adsorption section comprises multiple parallel adsorption modules, each with at least one layer of adsorption units. Functionally, each adsorption unit is a fixed adsorption bed containing an adsorbent. When the gas containing the adsorbate and basic components passes through the adsorption module, the adsorbate is adsorbed by the adsorbent within the adsorption unit. The regeneration section includes at least one desorption module with multiple stacked adsorption units. When high-temperature desorption gas passes through the desorption module, the adsorbate within the adsorption unit is desorbed and carried out by the desorption gas. The adsorption units are transferred between the adsorption section and the regeneration section via a mechanical device and circulate orderly during the adsorption and desorption processes.

[0009] See appendix Figure 1 The adsorption unit 1 specifically includes a housing 12, an adsorption gas inlet 121, an adsorption gas outlet 122, an adsorption array assembly 11, an adsorption unit transfer-in position 13, and an adsorption unit transfer-out position 14. The adsorption array assembly 11 comprises multiple adsorption modules 111, each including at least one layer of adsorption units 110, arranged in parallel, dividing the space enclosed by the housing into an intake distribution box 123 and an exhaust collection box 124. The adsorption gas inlet is connected to the intake distribution box, and the adsorption gas outlet is connected to the exhaust collection box. During operation, the adsorption gas from the gas collection device 15 enters the intake distribution box through the adsorption gas inlet, passes parallel to the adsorption modules on the adsorption array assembly, becomes treated clean gas, enters the exhaust collection box, and is discharged to the exhaust chimney 16 through the adsorption gas outlet. The adsorption array assembly also includes a set of mechanical support and transfer device 112, which functions to mechanically support each adsorption module to form a complete barrier that isolates the intake distribution box and the exhaust collection box, and sequentially moves the adsorption unit that has completed adsorption from the adsorption module in the adsorption function position to the transfer-out position 13, and moves the adsorption unit that has completed regeneration from the transfer-in position 14 to the adsorption module in the adsorption function position.

[0010] The optimized adsorption module comprises multiple adsorption units. The end of the adsorption module located on the side of the intake distribution box is called the head end 1111, and the end located on the side of the exhaust collection box is called the tail end 1112. A mechanical support and transfer device moves the adsorption unit from the head end of the adsorption module to the adsorption unit exit position, and then moves the regenerated adsorption unit from the adsorption unit inlet position to the tail end of the adsorption module. The adsorption unit moves from the tail end to the head end within the adsorption module.

[0011] See appendix Figure 1-2Regarding the regeneration unit 2, it includes at least one desorption module 20 with multiple stacked adsorption units. Each desorption module includes a desorption module housing 21, a desorption gas inlet 212, a desorption gas outlet 213, a desorption gas heater 22, an adsorption unit desorption column 23, an adsorption unit heat recovery column 24, an adsorption unit receiving channel 25, an adsorption unit sending channel 26, and corresponding mechanical moving devices. The adsorption unit heat recovery column and the adsorption unit receiving channel are composed of multiple stacked adsorption units. The desorption gas from the desorption gas supply device 27 is sent to the desorption gas treatment device (RTO is used as an example in the figure) through the regeneration module in the order of desorption gas inlet - adsorption unit heat recovery column - desorption gas heater - adsorption unit desorption column - desorption gas outlet. The mechanical moving device moves the adsorption units within the desorption module in the order of adsorption unit receiving channel - adsorption unit desorption column - adsorption unit heat recovery column - adsorption unit sending channel.

[0012] The adsorption unit receiving channel and the adsorption unit sending channel of the regeneration section are functionally connected to the adsorption unit transfer-out position and the adsorption unit transfer-in position of the adsorption section, respectively. The adsorbed gas and the desorbed gas are relatively isolated at the docking point between the two parts. This isolation can be achieved by a transition chamber connected between the adsorption section and the regeneration section, with valves installed on both sides.

[0013] The adsorption array assembly can employ a sprocket structure. Each adsorption module serves as an attachment link on a chain, and all adsorption modules can rotate cyclically on the sprocket.

[0014] The number of chain links in the sprocket structure can be adjusted according to the flow rate of the adsorbed gas, thereby adjusting the number of adsorption modules.

[0015] See appendix Figure 3 The regeneration section can be equipped with two or more desorption modules 20. When multiple desorption modules work simultaneously, it is necessary to coordinate the distribution of adsorption units transferred from the adsorption section among the various desorption modules at appropriate intervals and transfer them back to the adsorption section in the same manner.

[0016] See appendix Figure 4-5 The desorption module can be configured in an inverted U-shape, with the desorption gas heater 22 at the top, and the adsorption unit desorption column 23 and adsorption unit heat recovery column 24 positioned on either side below. The desorption gas entering the desorption module absorbs heat from the adsorption unit heat recovery column, preheating it, and is then heated to the predetermined desorption temperature by the air heater. This heat then desorbs the adsorption unit in the desorption column, while the desorption gas is cooled, carrying the adsorbate out of the desorption module. Similarly, the adsorption unit passing through the desorption module undergoes a process of first heating and then cooling. These two processes clearly demonstrate that the desorption-regeneration process is highly efficient and energy-saving.

[0017] The adsorption unit can be filled with ordinary industrial granular adsorbent 1101, which reduces the dosage requirements of the adsorbent during commercial promotion, thereby reducing the difficulty of technical implementation and saving equipment manufacturing costs.

[0018] See appendix Figure 6 The desorbed gas discharged during the desorption operation of this device can be treated by RTO pyrolysis. When the calorific value of the desorbed gas exceeds the requirements for the RTO to maintain operation, the excess heat generated in the RTO can be used as a heat source for heating the desorbed gas in the desorption module through heat exchange pipelines.

[0019] The beneficial effects of this invention are:

[0020] 1. Effectively solves the problems of high air resistance during adsorption operation and low efficiency during desorption operation in high-flow-rate gas adsorption and concentration devices.

[0021] 2. The number of chain links can be set according to the flow rate of the adsorbed gas, so that the flow load of the equipment can be greatly changed without changing the specifications of the main components of the equipment.

[0022] 3. For different adsorbed gases, the regeneration capacity of the desorption module and the adsorption capacity of the adsorption module can be optimized according to the concentration ratio.

[0023] 4. For a fixed-configuration adsorption concentration device, the circulation cycle of the adsorption module and the desorption airflow of the desorption module can be adjusted to accommodate significant changes in the adsorbed gas flow rate and concentration. For devices with multiple desorption modules, even greater variations in the adsorbed gas flow rate and concentration can be accommodated by activating different numbers of desorption modules.

[0024] 5. This invention fully inherits the technical advantages of high efficiency and energy saving in the desorption and regeneration process of the adsorption separation device disclosed in patent document CN110013736A. Attached Figure Description

[0025] Figure 1 A schematic diagram of a composite array structure gas adsorption and concentration device, showing the flow direction of adsorbed and desorbed gases and the adsorbate transfer process. The number of "+" signs in the diagram indicates the content of adsorbate, the large hollow double-sided arrows indicate the flow direction of adsorbed gas, and the small hollow arrows indicate the flow direction of desorbed gas.

[0026] Figure 2 . Figure 1 The schematic diagram of the device shows the flow process of the adsorption unit, and the hollow single-sided arrow indicates the transfer direction of the adsorption unit.

[0027] Figure 3 . Figure 1 The schematic diagram of the device shown shows that the regeneration section is equipped with two desorption modules.

[0028] Figure 4 . Figure 1 The partial schematic diagram of the device shows the heat distribution during the desorption process of the desorption module.

[0029] Figure 5 . Figure 1 The partial schematic diagram of the device shows the filling of the adsorbent packing material in the adsorption unit.

[0030] Figure 6 . Figure 1 The schematic diagram of the device shown illustrates how it is integrated with the RTO.

[0031] Figure 7 A perspective view of an embodiment of a composite array structure gas adsorption and concentration device, showing a partial cross-section of the outer shell and some internal components.

[0032] Figure 8 . Figure 7 The diagram shows a three-dimensional view of the device, with the outer shell of the adsorption section removed, and the outer shell of the desorption module and some components of the adsorption section cut open.

[0033] Figure 9 . Figure 7 The diagram shows a three-dimensional view of the adsorption section of the device, with the outer shell and one side annular seal removed.

[0034] Figure 10 . Figure 7 The diagram shows a three-dimensional view of the adsorption section of the device, illustrating the circulating mechanical structure of the adsorption unit.

[0035] Figure 11 . Figure 7 The partial perspective view of the device shows the functional structure of the adsorption unit transferring power between the adsorption section and the regeneration section, as well as the valve configuration of the transition chamber.

[0036] Figure 12 . Figure 7 The partial perspective view of the device shown illustrates the valves in the transition chamber. Detailed Implementation

[0037] Example 1 Gas adsorption and concentration device with chain array structure

[0038] See appendix Figure 7-12 The gas adsorption and concentration device of this embodiment includes an adsorption section 1 and a regeneration section 2.

[0039] See appendix Figure 7-10The specific components of the adsorption unit 1 include a housing 12, an adsorption gas inlet 121, an adsorption gas outlet 122, an adsorption array assembly 11, an adsorption unit insertion position 13, and an adsorption unit exit position 14. Twelve adsorption modules 111, each comprising three layers of adsorption units 110, are arranged side-by-side on the adsorption array assembly 11. The adsorption array assembly 11 divides the space enclosed by the housing into an intake distribution box 123 and an exhaust collection box 124. The adsorption gas inlet 121 communicates with the intake distribution box 123, and the adsorption gas outlet 122 communicates with the exhaust collection box 124. The mechanical support and transfer device 112 of the adsorption array assembly 11 is specifically configured as a sprocket structure, mainly including two pairs of gears 1121 and a chain 1122 connecting the two pairs of gears and rotating around them. Each adsorption module 111 serves as an auxiliary structure of one link of the chain, corresponding to one link. A soft seal 1123 is provided between the chain links, and an annular seal 1124 is provided between the chain body and the adsorption unit housing. The annular seal 1124 rotates synchronously with the chain body 1122. The function of the two seals is to form a complete barrier between the adsorption modules 111 and between the adsorption array assembly 11 and the housing 12, isolating the intake distribution box 123 and the exhaust collection box 124. An adsorption unit transfer position 13 is provided in the space of the exhaust collection box 124 below the upper half ring of the chain body of the adsorption array assembly 11, for transferring the adsorption unit that has completed desorption and regeneration into the adsorption array assembly. An adsorption unit transfer position 14 is provided in the space of the intake distribution box 123 above the upper half ring of the chain body, for transferring the adsorption unit that has completed adsorption out of the adsorption array assembly. A tray 131 that provides positioning and constraint for the adsorption module and a hydraulic push rod 132 that pushes the adsorption module into the adsorption module sleeve 1111 are provided in the adsorption unit transfer position 13. A cover plate 141 is provided on the adsorption unit exit position 14 to position and constrain the adsorption module, and a hydraulic push rod 142 is provided to push the adsorption module 110 out of the adsorption array assembly 11 into the desorption module 211.

[0040] See appendix Figure 8 , 11 Regarding section 12, the regeneration unit 2 is equipped with a desorption module 20, including a desorption module housing 21, a desorption gas inlet 212, a desorption gas outlet 213, a desorption gas heater 22, an adsorption unit desorption column 23, an adsorption unit heat recovery column 24, an adsorption unit receiving channel 25, and an adsorption unit sending channel 26. The adsorption unit receiving channel 25 of the regeneration unit desorption module is functionally connected to the adsorption unit exit position 14 of the adsorption unit via a receiving transition chamber 214. The adsorption unit sending channel 26 of the regeneration unit desorption module is functionally connected to the adsorption unit entry position 13 of the adsorption unit via a sending transition chamber 215. Transition valves 216 are provided at the communication points between the receiving transition chamber and the sending transition chamber and the adsorption unit housing and the regeneration unit desorption module housing, respectively. The gate 2161 of the transition valve 216 is opened and closed by a multi-stage hydraulic push rod 2162.

Claims

1. A gas adsorption concentration device comprising an adsorption section and a regeneration section, characterized by, The adsorption part includes a plurality of parallel adsorption modules with multiple layers of adsorption units and a set of mechanical support and transfer devices. The adsorption module includes a head end and a tail end. The adsorption unit is a fixed adsorption bed with adsorbent. When the adsorption gas containing adsorbate and basic components passes through the adsorption module, the adsorbate is adsorbed by the adsorbent in the adsorption unit to complete the separation. The adsorption gas flows from the head end to the tail end in the adsorption module. The regeneration part includes at least one desorption module with multiple layers of stacked adsorption units. The desorption module includes an adsorption unit desorption column, an adsorption unit heat recovery column and a mechanical moving device. When the desorption gas passes through the desorption module, the adsorbate in the adsorption unit is desorbed and carried out of the device by the desorption gas. The adsorbent is regenerated. The adsorption gas flows from the adsorption unit heat recovery column to the adsorption unit desorption column in the desorption module. The mechanical support and transfer device supports the movement of the adsorption unit from the tail end to the head end in the adsorption module and the movement of the adsorption module inside the adsorption part. The mechanical moving device also supports the movement of the adsorption unit from the adsorption unit desorption column to the adsorption unit heat recovery column in the desorption module. The mechanical support and transfer device and the mechanical moving device sequentially transfer the adsorption unit that has completed adsorption from the adsorption part to the regeneration part and transfer the adsorption unit that has completed regeneration treatment from the regeneration part to the adsorption part.

2. The gas adsorbing concentration device according to claim 1, wherein The regeneration part includes two desorption modules.

3. The gas adsorbing concentration device according to claim 1, wherein The adsorption part includes a housing, an adsorption gas inlet, an adsorption gas outlet, an adsorption array assembly, an adsorption unit transfer-in position and an adsorption unit transfer-out position. The adsorption array assembly divides the space surrounded by the housing into a gas inlet distribution box and a gas outlet collection box. The adsorption gas inlet communicates with the gas inlet distribution box, and the adsorption gas outlet communicates with the gas outlet collection box. The mechanical support and transfer device, as a component of the adsorption array assembly, sequentially moves the adsorption unit that has completed adsorption from the adsorption function position in the adsorption module to the adsorption unit transfer-out position, and moves the adsorption unit that has completed regeneration treatment from the adsorption unit transfer-in position to the adsorption function position in the adsorption module.

4. The gas adsorbing concentration device according to claim 3, wherein The head end of the adsorption module is located on one side of the gas inlet distribution box, and the tail end of the adsorption module is located on one side of the gas outlet collection box. The mechanical support and transfer device moves the adsorption unit from the head end of the adsorption module to the adsorption unit transfer-out position, and moves the adsorption unit that has completed regeneration treatment from the adsorption unit transfer-in position to the tail end of the adsorption module. The adsorption unit moves from the tail end to the head end in the adsorption module.

5. The gas adsorbing concentration device according to claim 4, wherein The desorption module further includes a desorption module housing, a desorption gas inlet, a desorption gas outlet, a desorption gas heater, an adsorption unit receiving channel and an adsorption unit sending channel. The desorption gas from the desorption gas supply device passes through the desorption module in the order of desorption gas inlet-adsorption unit heat recovery column-desorption gas heater-adsorption unit desorption column-desorption gas outlet to the desorption treatment device. The mechanical moving device moves the adsorption unit in the desorption module in the order of adsorption unit receiving channel-adsorption unit desorption column-adsorption unit heat recovery column-adsorption unit sending channel.

6. The gas adsorbing concentration device according to claim 5, wherein The receiving channel and the sending channel of the adsorption unit of the regeneration part are respectively connected with the adsorption unit transfer-out position and the adsorption unit transfer-in position of the adsorption part, and the adsorption gas and the desorption gas are isolated from each other at the connection position, and the isolation is realized by a transition cabin connected between the adsorption part and the regeneration part and provided with valves on both sides.

7. The gas adsorbing concentration device according to claim 6, wherein The adsorption array assembly adopts a chain wheel structure, each adsorption module is an accessory of a chain link, and all the adsorption modules rotate on the chain wheel.

8. The gas adsorbing concentration device according to claim 7, wherein The chain wheel structure sets the number of chain links according to the flow of the adsorption gas, so as to adjust the number of adsorption modules.

9. The gas adsorbing concentration device according to claim 8, wherein The desorption module is arranged in an inverted U-shaped structure, the desorption gas heater is arranged at the top, and the adsorption unit desorption column and the adsorption unit heat recovery column are arranged below the two sides.

10. The gas adsorbing concentration device according to any one of claims 1 to 9, characterized by, The desorption gas is treated by RTO pyrolysis, and the heat generated in the RTO is transmitted to the desorption module through a heat exchange pipeline as a desorption heat source.

11. The gas adsorbing concentration device according to claim 10, wherein The adsorbent filled in the adsorption unit is an industrial general granular agent.

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