Low-temperature flue gas conveying system and low-temperature adsorption system

Abstract

The invention discloses a low-temperature flue gas conveying system and a low-temperature adsorption system.The low-temperature flue gas conveying system comprises a flue gas inlet pipe and a stopping piece, the flue gas inlet pipe is provided with a flue gas inlet and a plurality of flue gas feeding openings, the stopping piece is located in the flue gas inlet pipe and connected with the inner wall face of the flue gas inlet pipe, and the stopping piece is arranged at the position, close to at least one flue gas feeding opening of the flue gas feeding openings, of the flue gas feeding openings; a gap is formed between at least part of the stopping piece and the smoke feeding opening, and the stopping piece is used for shunting so that part of airflow in the smoke inlet pipe can enter the smoke feeding opening through the gap, and the other part of airflow flows to the downstream smoke feeding opening. According to the low-temperature flue gas conveying system provided by the invention, the stop piece is arranged at the flue gas conveying opening close to the flue gas inlet of the flue gas inlet pipe, and the stop piece is used for shunting the gas flow in the flue gas inlet pipe, so that the flue gas flow velocity at the flue gas conveying opening at the relative upstream is reduced to a certain extent, and the low-temperature flue gas flow velocity at each flue gas conveying opening is balanced; and further, the uniformity of airflow distribution in each low-temperature flue gas treatment bin is optimized.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas adsorption, and in particular to a low-temperature flue gas conveying system and a low-temperature adsorption system. Background Art

[0002] The basic principle of low-temperature adsorption technology for flue gas is to cool the flue gas to low-temperature flue gas below room temperature, for example, and then remove the pollutant components in the flue gas by adsorption. In low-temperature adsorption, the adsorption capacity of the adsorbent is increased exponentially in a low-temperature environment, which greatly improves the adsorption purification rate compared with conventional high-temperature flue gas adsorption, and can achieve near-zero emissions of flue gas. In the related art, a low-temperature adsorption tower is used to adsorb and purify low-temperature flue gas. A low-temperature flue gas treatment chamber is provided in the low-temperature adsorption tower, and adsorption beds for adsorbing and purifying flue gas are stacked in the low-temperature flue gas treatment chamber. In order to improve the efficiency of flue gas treatment, it is proposed in the related art to set up multiple low-temperature flue gas treatment chambers in parallel, and to transport low-temperature flue gas to each low-temperature flue gas treatment chamber through a smoke inlet pipe. However, due to the different positions of different low-temperature flue gas treatment chambers, the length of the smoke flow path when the smoke inlet pipe transports smoke to each low-temperature flue gas treatment chamber is different, and there will be a problem of uneven flow distribution of smoke in each low-temperature flue gas treatment chamber, resulting in uneven distribution of smoke between each low-temperature flue gas treatment chamber, affecting the smoke treatment effect. Summary of the invention

[0003] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0004] The inventors simulated the flow field of the low-temperature flue gas delivery system that delivers smoke to each parallel low-temperature flue gas treatment chamber through CFD numerical simulation, and analyzed the uniformity of the airflow distribution of each low-temperature flue gas treatment chamber in the flue gas adsorption system. As a model, the flue gas adsorption system includes sixteen low-temperature flue gas treatment chambers, and the low-temperature flue gas delivery system includes four smoke inlet pipes, each of which delivers low-temperature flue gas to four low-temperature flue gas treatment chambers stacked in a vertical direction. The smoke inlet of the smoke inlet pipe is located in the middle of the smoke inlet pipe, that is, of the four smoke delivery ports of the smoke inlet pipe (sending smoke to the corresponding low-temperature flue gas treatment chamber), two smoke delivery ports are located above the smoke inlet port, and the remaining two smoke delivery ports are located below the smoke inlet port.

[0005] Fig. 9 The distribution of flow at the entrance of each low-temperature flue gas treatment chamber is shown. Fig.10 The vertical flue gas flow diagram of four low-temperature flue gas treatment chambers is shown. Fig. 9 and Fig.10 It can be seen that the flue gas flow in the two middle layers of low-temperature flue gas treatment chambers is significantly larger, and the flow in the top and bottom layers of low-temperature flue gas treatment chambers is significantly lower.

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a low-temperature flue gas delivery system.

[0007] An embodiment of the present invention further provides a low-temperature adsorption system.

[0008] The low-temperature flue gas conveying system of the embodiment of the present invention comprises: a smoke inlet pipe, the smoke inlet pipe having a smoke inlet port and a plurality of smoke delivery ports, the plurality of smoke delivery ports being arranged at intervals in the extension direction of the smoke inlet pipe, the smoke inlet pipe progressively shrinking or continuously shrinking from the smoke inlet port along the flow direction of the low-temperature smoke toward each smoke delivery port, the temperature of the low-temperature smoke being below room temperature; a stopper, the stopper being located in the smoke inlet pipe and connected to the inner wall surface of the smoke inlet pipe, the stopper being arranged at at least one smoke delivery port adjacent to the smoke inlet port among the plurality of smoke delivery ports, and at least a portion of the stopper being spaced from the smoke delivery port, the stopper being used for diverting flow so that a portion of the airflow in the smoke inlet pipe enters the smoke delivery port through the interval, and another portion of the airflow flows to the downstream smoke delivery port.

[0009] The low-temperature flue gas delivery system provided by the embodiment of the present invention solves the problem in the related art that the flow rate of flue gas in the upstream low-temperature flue gas treatment chamber is greater than the flow rate of flue gas in the downstream low-temperature flue gas treatment chamber during the process of the flue gas inlet pipe delivering flue gas to multiple low-temperature flue gas treatment chambers. By setting a stopper at the smoke delivery port close to the smoke inlet of the smoke inlet pipe, the stopper diverts the airflow in the smoke inlet pipe, and to a certain extent reduces the flue gas flow rate at the upstream smoke delivery port, thereby balancing the flue gas flow rate at each smoke delivery port, and further optimizing the uniformity of the airflow distribution in each low-temperature flue gas treatment chamber, so that the flow rate of flue gas in each low-temperature flue gas treatment chamber is more uniform, and the flue gas treatment effect is better.

[0010] In some embodiments, the stopper is a tube, which extends along the smoke inlet pipe. The tube has an inlet end relatively close to the smoke inlet port and an outlet end relatively far away from the smoke inlet port in the extension direction of the smoke inlet pipe, and the outlet end of the tube is connected to the inner wall surface of the smoke inlet pipe.

[0011] In some embodiments, the cannula is a trumpet tube, and the cannula contracts from the inlet end to the outlet end. Such a configuration can increase the proportion of the airflow entering the cannula after diversion, so that more smoke can be sent to the downstream smoke delivery port along the cannula, making the flow rate of smoke at each smoke delivery port more balanced.

[0012] In some embodiments, the ratio of the outlet diameter to the inlet diameter of the bell tube is 3 / 5-4 / 5. When the ratio of the outlet diameter to the inlet diameter of the bell tube is 3 / 5-4 / 5, the intubation tube can guide a certain proportion of the airflow to the downstream smoke delivery port, and at the same time reduce the smoke flow velocity at the smoke delivery port corresponding to the intubation tube to a certain extent, thereby achieving the effect of balancing the smoke flow at multiple smoke delivery ports on the smoke inlet pipe.

[0013] In some embodiments, the smoke inlet pipe includes a plurality of pipe sections connected in sequence in its extension direction, the inner diameter of the pipe section close to the smoke inlet port is larger than the inner diameter of the pipe section away from the smoke inlet port, the insert pipe is arranged in the pipe section with the larger inner diameter of the two adjacent pipe sections, and the outlet end of the insert pipe is connected to the pipe section with the smaller inner diameter; or, at least a portion of the smoke inlet pipe is a gradient section, and the inner diameter of the gradient section gradually decreases from close to the smoke inlet port to away from the smoke inlet port.

[0014] In some embodiments, the length of the insert tube in the extension direction of the smoke inlet pipe is the same as the length of the smoke delivery port in the extension direction of the smoke inlet pipe, the inlet end of the insert tube is flush with the first edge of the smoke delivery port in the extension direction of the smoke inlet pipe close to the smoke inlet, and the outlet end of the insert tube is flush with the second edge of the smoke delivery port in the extension direction of the smoke inlet pipe away from the smoke inlet.

[0015] In some embodiments, the stopper is a baffle having a first end away from the smoke inlet and a second end close to the smoke inlet, and the first end of the baffle is connected to the inner wall surface of the smoke inlet pipe.

[0016] In some embodiments, there are multiple smoke inlet pipes, which are arranged in parallel and extend in a vertical direction. The low-temperature smoke delivery system also includes a horizontally arranged main smoke duct, which is connected to the smoke inlets of the multiple smoke inlet pipes. The main smoke duct shrinks progressively or continuously along the flow direction of the smoke toward each of the smoke inlets.

[0017] In some embodiments, the main flue includes a plurality of pipes connected in sequence in its extension direction, the inner diameter of the pipe close to the inlet of the main flue is larger than the inner diameter of the pipe far from the inlet of the main flue, and the low-temperature flue gas delivery system further includes a throttle ring, which is at least arranged at the inlet of the pipe with the smallest inner diameter among the plurality of pipes. The throttle ring plays a role in balancing the flue gas in the main flue.

[0018] The low-temperature adsorption technology of flue gas is to remove pollutant components from low-temperature flue gas by adsorption with adsorbents. The inventors have realized through research that in a low-temperature environment, usually below room temperature, preferably below zero degrees Celsius, nitrogen oxides in flue gas undergo low-temperature oxidation adsorption on the surface of adsorbents such as activated carbon, oxidizing the difficult-to-adsorb nitric oxide gas into easily adsorbed nitrogen dioxide gas, which can achieve a hundreds-fold increase in adsorption capacity. In addition, the adsorption capacity of sulfur dioxide, carbon dioxide, and heavy metals is also multiplied in a low-temperature environment.

[0019] On the other hand, an embodiment of the present invention provides a low-temperature adsorption system, including a flue gas cooling tower, which is used to cool the flue gas into low-temperature flue gas with a temperature below room temperature; a plurality of low-temperature flue gas treatment chambers arranged in parallel, each of which has a flue gas inlet and a flue gas outlet; the low-temperature flue gas conveying system in the above embodiment, wherein the flue gas cooling tower is connected to the smoke inlet of the low-temperature flue gas conveying system, and the plurality of smoke delivery ports of the low-temperature flue gas conveying system are connected one-to-one with the smoke inlets of the plurality of low-temperature flue gas treatment chambers to deliver the low-temperature flue gas into the low-temperature flue gas treatment chambers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the low-temperature adsorption system provided in an embodiment of the present invention.

[0021] Figure 2 It is a three-dimensional cross-sectional view of a low-temperature adsorption system provided by an embodiment of the present invention.

[0022] Figure 3 It is a cross-sectional view of the low-temperature flue gas delivery system provided in Example 1 of the present invention.

[0023] Figure 4 It is a cross-sectional view of a low-temperature flue gas delivery system provided in Embodiment 2 of the present invention.

[0024] Figure 5 It is a cross-sectional view of a low-temperature flue gas delivery system provided in Embodiment 3 of the present invention.

[0025] Figure 6 It is a cross-sectional view of a low-temperature flue gas delivery system provided in Embodiment 4 of the present invention.

[0026] Figure 7 It is a cross-sectional view of a low-temperature flue gas delivery system provided in Embodiment 5 of the present invention.

[0027] Figure 8 It is a cross-sectional view of a main flue provided in an embodiment of the present invention.

[0028] Fig. 9 It is a flow distribution diagram at the flue gas inlet of each low-temperature flue gas treatment chamber of the low-temperature adsorption system in the related art.

[0029] Fig.10 yes Fig. 9 The flue gas flow line diagram of four low-temperature flue gas treatment chambers distributed in the vertical direction.

[0030] Fig.11 It is a flow distribution diagram at the flue gas inlet of each low-temperature flue gas treatment chamber of the low-temperature adsorption system provided in an embodiment of the present invention.

[0031] Fig.12 It is the calculation result of the average flow velocity at the flue gas inlet of each low-temperature flue gas treatment chamber of the low-temperature adsorption system provided in the embodiment of the present invention.

[0032] Fig.13 It is the calculation result of the average flow velocity of the bed section in each low-temperature flue gas treatment chamber of the low-temperature adsorption system provided by the embodiment of the present invention.

[0033] Reference numerals:

[0034] Smoke inlet pipe 100, smoke inlet port 110, smoke delivery port 120, first pipe section 131, second pipe section 132, third pipe section 133, gradient section 140, smoke delivery pipe 150,

[0035] Stopper 200, cannula 210, inlet end 211, outlet end 212, baffle 220,

[0036] Main flue 300, pipe 310, throttle ring 320, inlet 330, outlet 340,

[0037] Low temperature flue gas treatment chamber 400. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0039] According to the following Figure 1-Figure 8 The low-temperature flue gas conveying system and the low-temperature adsorption system provided by the embodiments of the present invention are described.

[0040] like Figure 1As shown, the low-temperature smoke delivery system includes a smoke inlet pipe 100 and a stopper 200. The smoke inlet pipe has a smoke inlet port 110 and a plurality of smoke delivery ports 120. The plurality of smoke delivery ports 120 are arranged at intervals in the extension direction of the smoke inlet pipe 100. The plurality of smoke delivery ports 120 are used to deliver the low-temperature smoke to be processed to each parallel low-temperature smoke processing chamber 400. The smoke in the smoke inlet pipe 100 is discharged from each smoke delivery port 120 in sequence. A portion of the low-temperature smoke entering the smoke inlet pipe 100 from the smoke inlet port 110 is first discharged from the smoke delivery port 120 closer to the smoke inlet port 110, and the remaining low-temperature smoke continues to flow to the downstream smoke delivery port 120 along the smoke inlet pipe 100. Therefore, along the flow direction of the low-temperature smoke, the amount of smoke in the smoke inlet pipe 100 gradually decreases. In order to make the smoke flow rate in the smoke inlet pipe 100 balanced, the smoke inlet pipe 100 is progressively or continuously contracted from the smoke inlet port 110 to each smoke delivery port 120 along the flow direction of the low-temperature smoke. The temperature of the low-temperature smoke is below room temperature.

[0041] The "progressive contraction" means that the inner diameter of the smoke inlet pipe 100 decreases stepwise from the smoke inlet port 110 along the flow direction of the smoke, and the "continuous contraction" means that the inner diameter of the smoke inlet pipe 100 decreases gradually from the smoke inlet port 110 along the flow direction of the smoke. This is conducive to balancing the flow rate in the smoke inlet pipe 100.

[0042] The stopper 200 is located in the smoke inlet pipe 100 and connected to the inner wall surface of the smoke inlet pipe 100. The stopper 200 is provided at at least one smoke delivery port 120 adjacent to the smoke inlet port 110 among the multiple smoke delivery ports 120. That is, the stopper 200 is provided at at least one smoke delivery port 120 adjacent to the smoke inlet port 110 among the multiple smoke delivery ports 120 provided on the smoke inlet pipe 100. For example, the smoke inlet pipe 100 is provided with three smoke delivery ports 120, wherein the stopper 200 may be provided at the smoke delivery port 120 closest to the smoke inlet port 110, or the stopper 200 may be provided at the remaining two smoke delivery ports 120 except the smoke delivery port 120 farthest from the smoke inlet port 110. It should be noted that, when the stopper 200 is provided at the multiple smoke delivery ports 120, the stopper 200 corresponds to the smoke delivery ports 120 one by one.

[0043] There is a gap between at least part of the stopper 200 and the corresponding smoke delivery port 120, and the stopper 200 is used to divert the flow so that a part of the airflow in the smoke inlet pipe 100 enters the smoke delivery port 120 through the gap, and the other part of the airflow flows to the downstream smoke delivery port 120. The smoke flowing in the smoke inlet pipe 100 is diverted by the stopper 200 after encountering the stopper 200, and a part of the airflow enters the gap between the stopper 200 and the corresponding smoke delivery port 120, and is discharged from the smoke delivery port 120 through the gap, and the other part of the airflow continues to flow to the downstream smoke delivery port 120.

[0044] In combination with the flow diversion effect of the stopper 200, it can be known that the interval between the stopper 200 and the corresponding smoke delivery port 120 can be directly opposite to the airflow in the airflow flow direction, and the airflow entering the interval can be discharged from the corresponding connected smoke delivery port 120. The interval between the stopper 200 and the corresponding smoke delivery port 120 plays a "buffer" role, and the flow rate of the airflow entering the interval is slowed down, thereby reducing the flow rate at the upstream smoke delivery port 120 to a certain extent, thereby balancing the flow rate of the upstream smoke delivery port 120 and the flow rate of the downstream smoke delivery port 120.

[0045] The low-temperature flue gas delivery system provided by the embodiment of the present invention adopts a stopper to divert the flow, instead of directly adopting the technical means of reducing the cross-sectional area of ​​the upstream smoke delivery port 120, because if the upstream smoke delivery port 120 is directly reduced, it can only achieve the balance of the air supply volume of each smoke delivery port 120 per unit time, but cannot achieve the balance of the flue gas flow rate at each smoke delivery port 120, and this adjustment method will also have a great impact on the flow pattern of the flue gas. The difference in the flow rate of the flue gas will affect the distribution of the flue gas in the low-temperature flue gas treatment chamber 400 and the adsorption process of the flue gas. Therefore, if the problem of uneven distribution of flue gas in each low-temperature flue gas treatment chamber 400 is to be solved, it is necessary to achieve it by balancing the flue gas flow rate at each smoke delivery port 120. The balance of air supply volume is not the only effect achieved by the low-temperature flue gas delivery system provided by the embodiment of the present invention. The substantial effect of the low-temperature flue gas delivery system provided by the embodiment of the present invention is to achieve the balance of the flue gas flow rate at each smoke delivery port 120, and then achieve the uniform distribution of flue gas in each low-temperature flue gas treatment chamber 400.

[0046] In summary, the low-temperature flue gas delivery system provided by the embodiment of the present invention solves the problem in the related art that the flow rate of flue gas in the upstream low-temperature flue gas treatment chamber is greater than the flow rate of flue gas in the downstream low-temperature flue gas treatment chamber during the process of the flue gas inlet pipe delivering flue gas to multiple low-temperature flue gas treatment chambers. By setting a stopper at the smoke delivery port close to the smoke inlet of the smoke inlet pipe, the stopper diverts the airflow in the smoke inlet pipe, and to a certain extent reduces the flue gas flow rate at the upstream smoke delivery port, thereby balancing the flue gas flow rate at each smoke delivery port, and further optimizing the uniformity of the airflow distribution in each low-temperature flue gas treatment chamber, so that the flow rate of flue gas in each low-temperature flue gas treatment chamber is more uniform, and the flue gas treatment effect is better.

[0047] In some embodiments, the smoke inlet pipe 100 is a "progressive contraction" structure, such as Figure 3 and Figure 7 As shown, the smoke inlet pipe 100 includes a plurality of pipe sections connected in sequence in its extending direction, and the inner diameter of the pipe section close to the smoke inlet port 110 is greater than the inner diameter of the pipe section far from the smoke inlet port 110 .

[0048] In some alternative embodiments, the smoke inlet pipe 100 is a "continuous contraction" structure, such as Figure 6As shown, at least a portion of the smoke inlet pipe 100 is a gradual section 140 , and the inner diameter of the gradual section 140 gradually decreases from a portion close to the smoke inlet port 110 to a portion far away from the smoke inlet port 110 .

[0049] In some embodiments, Figure 3-Figure 6 As shown, the stopper 200 is a plug 210, the length direction of the plug 210 extends along the smoke inlet pipe 100, and the plug 210 has two opposite ends in the extension direction of the smoke inlet pipe 100, wherein one end relatively close to the smoke inlet port 110 is the inlet end of the plug 210, and the other end relatively far from the smoke inlet port 110 is the outlet end of the plug 210, and a part of the split smoke enters the plug 210 from the inlet end of the plug 210, is discharged from the outlet end of the plug 210, and flows to the downstream smoke delivery port 120. The outlet end of the plug 210 is connected to the inner wall surface of the smoke inlet pipe 100. There is a gap between the plug 210 and the inner wall surface of the smoke inlet pipe 100, and the smoke delivery port 120 opposite to the plug 210 is connected to the gap.

[0050] Furthermore, the outlet end of the insert tube 210 is sealedly connected to the inner wall surface of the smoke inlet pipe 100, so that the airflow enters the gap and is discharged from the corresponding smoke outlet 120, thereby increasing the buffering effect of the insert tube 210 on the airflow and making the smoke flow rate at each smoke outlet 120 more balanced.

[0051] In some embodiments, the cannula 210 is a straight tube, that is, the inner diameter of the cannula 210 is uniform and constant in its extending direction.

[0052] In some alternative embodiments, the insert tube 210 is a trumpet tube, and the insert tube 210 contracts from the inlet end to the outlet end, that is, the cross-sectional area of ​​the inlet end of the insert tube 210 is larger than the cross-sectional area of ​​the outlet end. Such a configuration can increase the proportion of the airflow entering the insert tube 210 after diversion, so that more smoke can be sent to the downstream smoke delivery port 120 along the insert tube 210, and the flow rate of the smoke at each smoke delivery port 120 is more balanced.

[0053] Optionally, the cannula 210 is a trumpet tube, and the ratio of the outlet diameter to the inlet diameter of the trumpet tube is 3 / 5-4 / 5.

[0054] If the ratio of the outlet diameter to the inlet diameter of the bell tube is less than 3 / 5, the outlet diameter of the insert tube 210 will be too small, or the inlet diameter will be too large. When the outlet diameter of the insert tube 210 is too small, the proportion of the airflow flowing through the insert tube 210 to the downstream smoke outlet 120 will be reduced, which will affect the flow of smoke to the downstream smoke outlet 120, which is not conducive to the uniform distribution of smoke. When the inlet diameter of the insert tube 210 is too large, the proportion of the airflow flowing through the insert tube 210 to the downstream smoke outlet 120 is too large, and the proportion of the airflow entering the gap between the insert tube 210 and the inner wall of the smoke inlet pipe 100 is small, resulting in a slower smoke flow rate at the smoke outlet 120 corresponding to the insert tube 210, which is lower than the smoke flow rate at the downstream smoke outlet 120, which is also not conducive to the uniform distribution of smoke.

[0055] If the ratio of the outlet diameter to the inlet diameter of the bell tube is greater than 4 / 5, the outlet diameter of the insert tube 210 will be too large, or the inlet diameter will be too small. When the outlet diameter of the insert tube 210 is too large, the proportion of the airflow flowing through the insert tube 210 to the downstream smoke outlet 120 is large, which will cause the flow rate of the downstream smoke outlet 120 to be higher than that of the upstream smoke outlet 120. When the inlet diameter of the insert tube 210 is too small, the proportion of the airflow flowing to the downstream smoke outlet 120 is reduced, making the flow rate of the downstream smoke outlet 120 lower than that of the upstream smoke outlet 120, both of which are not conducive to the uniformity of smoke.

[0056] Therefore, the ratio of the outlet diameter to the inlet diameter of the bell tube is made to be 3 / 5-4 / 5, and the insert tube 210 can guide a certain proportion of the airflow to the downstream smoke outlet 120, while reducing the smoke flow rate at the smoke outlet 120 corresponding to the insert tube 210 to a certain extent, thereby achieving the effect of balancing the smoke airflow at multiple smoke outlets 120 on the smoke inlet pipe 100.

[0057] In some embodiments, the ratio of the cross-sectional area of ​​the inlet end of the cannula 210 to the cross-sectional area of ​​the interval between the cannula 210 and the smoke inlet pipe 100 is 5 / 4-2 / 1. The ratio of the cross-sectional area of ​​the inlet end of the cannula 210 to the cross-sectional area of ​​the interval affects the flow diversion effect of the cannula 210, that is, affects the smoke flow velocity at the smoke delivery port 120 corresponding to the cannula 210 and the smoke flow velocity at the downstream smoke delivery port 120.

[0058] If the ratio of the cross-sectional area of ​​the inlet end of the cannula 210 to the cross-sectional area of ​​the interval is less than 5 / 4, a larger amount of air will flow into the interval after diversion, and the smoke flow velocity at the upstream smoke delivery port 120 will be greater than the smoke flow velocity at the downstream smoke delivery port 120.

[0059] If the ratio of the cross-sectional area of ​​the inlet end of the insert tube 210 to the cross-sectional area of ​​the interval is greater than 2 / 1, the amount of airflow entering the interval after diversion will be too small, and the amount of airflow directed to the downstream smoke outlet 120 through the insert tube 210 will be relatively large, resulting in a smaller smoke flow rate at the upstream smoke outlet 120 than at the downstream smoke outlet 120.

[0060] Therefore, the ratio of the cross-sectional area of ​​the inlet end of the insert tube 210 to the cross-sectional area of ​​the interval between the insert tube 210 and the smoke inlet pipe 100 is 5 / 4-2 / 1, which is conducive to balancing the smoke flow at the multiple smoke delivery ports 120 on the smoke inlet pipe 100.

[0061] In some embodiments, the smoke inlet pipe 100 is a "progressive contraction" structure, such as Figure 3 and Figure 7 As shown, the insert tube 210 is disposed in the pipe section with a larger inner diameter among two adjacent pipe sections, and the outlet end of the insert tube 210 is connected to the pipe section with a smaller inner diameter.

[0062] In other embodiments, the smoke inlet pipe 100 is a "continuous contraction" structure, such as Figure 6 As shown, the insert tube 210 is located in the gradient section 140 and the outlet end of the insert tube 210 is connected to the inner wall surface of the smoke inlet pipe 100 .

[0063] In some preferred embodiments, the length of the insert tube 210 in the extension direction of the smoke inlet pipe 100 is the same as the length of the corresponding smoke delivery port 120 in the extension direction of the smoke inlet pipe 100, the inlet end of the insert tube 210 is flush with the first edge of the smoke delivery port 120 in the extension direction of the smoke inlet pipe 100 close to the smoke inlet port 110, and the outlet end of the insert tube 210 is flush with the second edge of the smoke delivery port 120 in the extension direction of the smoke inlet pipe 100 away from the smoke inlet port 110.

[0064] In some alternative embodiments, Figure 5 As shown, the stopper 200 is a baffle 220, which has a first end away from the smoke inlet 110 and a second end close to the smoke inlet 110. The first end of the baffle 220 is connected to the inner wall surface of the smoke inlet pipe 100, that is, the end of the baffle 220 away from the smoke inlet 110 is connected to the inner wall surface of the smoke inlet pipe 100.

[0065] In some embodiments, Figure 1 and Figure 2 As shown, there are multiple smoke inlet pipes 100, which are arranged in parallel and extend in the vertical direction. The low-temperature smoke delivery system also includes a horizontally arranged main smoke duct 300, which is connected to the smoke inlet ports 110 of the multiple smoke inlet pipes 100. The main smoke duct 300 is used to supply air to the multiple smoke inlet pipes 100, and then the multiple smoke inlet pipes 100 supply smoke to the multiple low-temperature smoke processing chambers 400. For example, Figure 1As shown, the main smoke duct 300 delivers smoke to four smoke inlet pipes 100 arranged in parallel in the horizontal direction. The main smoke duct 300 has an inlet 330 for smoke inlet and an outlet 340 for smoke outlet. The smoke flow direction in the main smoke duct 300 is from the inlet 330 to the outlet 340. The main smoke duct 300 shrinks progressively or continuously toward each smoke inlet 110 along the smoke flow direction.

[0066] For example, Figure 8 As shown, the main flue 300 is a "progressive contraction" structure, and the main flue 300 includes a plurality of pipes 310 connected in sequence in its extension direction, and the inner diameter of the pipe 310 close to the inlet 330 of the main flue 300 is larger than the inner diameter of the pipe 310 far from the inlet 330. Optionally, the ratio of the inner diameters of two adjacent pipes 310 is 1:1.1-1:1.5.

[0067] For another example, the main flue 300 is a “continuous contraction” structure, and the inner diameter of at least a portion of the main flue 300 gradually decreases from close to the inlet 330 to far away from the inlet 330 .

[0068] like Figure 1 and Figure 8 As shown, the main flue 300 has an inlet 330 and four outlets 340, and the four outlets 340 are sequentially away from the inlet 330 along the flow direction of the smoke. Fig. 9 As shown, the inventors found through data simulation that the farther the smoke inlet pipe 100 is from the inlet 300 of the main flue 300 , the greater the flow rate, which leads to uneven smoke distribution between the low-temperature smoke treatment chambers 400 .

[0069] In order to solve the above problems, in some embodiments, Figure 8 As shown, the low-temperature flue gas delivery system also includes a throttling ring 320, which is arranged at least at the inlet of the pipe 310 with the smallest inner diameter among the multiple pipes 310 to intercept the flue gas and achieve a balanced flow rate of the flue gas at each outlet 340 of the main flue 300.

[0070] For example, Figure 8 As shown, the throttling ring 320 is arranged at the entrance of the pipe 310 farthest from the inlet 330 to throttle the smoke entering the pipe 310 and reduce the smoke flow entering the pipe 310, thereby balancing the smoke in the main flue 300.

[0071] Optionally, the ratio of the inner diameter of the throttle ring 320 to the inner diameter of the inlet of the pipe 310 in which it is located is 7 / 10-9 / 10, so that the throttle ring 320 can balance the flow of smoke entering the pipe 310. If the ratio of the inner diameter of the throttle ring 320 to the inner diameter of the inlet of the pipe 310 in which it is located is less than 7 / 10, the throttling effect of the throttle ring 320 is too strong, resulting in too small flow of smoke entering the pipe 310, causing the flow velocity of the outlet 340 of the main flue 300 far away from the inlet 330 to be less than the flow velocity of the outlet near the inlet 330; if the ratio of the inner diameter of the throttle ring 320 to the inner diameter of the inlet of the pipe 310 in which it is located is greater than 9 / 10, the throttle ring 320 cannot have a sufficient throttling effect, and the problem that the flow velocity of the outlet 340 of the main flue 300 far away from the inlet 330 is greater than the flow velocity of the outlet near the inlet 330 cannot be solved.

[0072] Figure 1 and Figure 2 As shown, the low-temperature adsorption system provided by the embodiment of the present invention includes: a flue gas cooling tower (not shown in the figure), a plurality of parallel arranged low-temperature flue gas treatment chambers 400 and a low-temperature flue gas conveying system, the flue gas cooling tower is used to cool the flue gas into low-temperature flue gas with a temperature below room temperature, the low-temperature flue gas treatment chamber 400 has a flue gas inlet and a flue gas outlet, the flue gas cooling tower is connected to the smoke inlet of the low-temperature flue gas conveying system, and the plurality of smoke delivery ports 120 of the low-temperature flue gas conveying system are connected one-to-one with the smoke inlets of the plurality of low-temperature flue gas treatment chambers 400 to deliver low-temperature flue gas into the low-temperature flue gas treatment chambers 400.

[0073] In some preferred embodiments, the temperature of the low-temperature flue gas is below zero, for example, -80°C to -5°C.

[0074] More preferably, the temperature of the low-temperature flue gas is -20°C to -5°C. The inventors have found through research that the lower the flue gas temperature, the more beneficial it is for adsorption purification. However, if the flue gas temperature is too low, the equipment structure for cooling the flue gas will be complicated and the energy consumption will increase. For example, it is required to set up an insulation layer for the cooling equipment, adsorption tower and pipeline, and the sealing requirements are high, which will increase the cost. In addition, too low temperature conditions will easily cause condensation water to appear in the adsorption tower, causing the adsorbent to stick and clog, affecting adsorption. Therefore, it is beneficial to cool the flue gas temperature to -20°C to -5°C.

[0075] According to the following Figure 1-Figure 8 The low-temperature flue gas delivery system and the low-temperature adsorption system having the low-temperature flue gas delivery system in some specific embodiments of the present invention are described.

[0076] exist Figure 3In the illustrated embodiment, the smoke inlet pipe 100 extends in a vertical direction and has a smoke inlet port 110 and four smoke delivery ports 120. The smoke inlet pipe 100 in this embodiment is used to deliver the smoke to be treated into four low-temperature smoke treatment chambers 400 arranged in a vertical direction.

[0077] like Figure 3 As shown, two of the four smoke delivery ports 120 are located above the smoke inlet 110, and the other two are located below the smoke inlet 110. The smoke inlet 110 and the smoke delivery ports 120 are both oriented horizontally, and each smoke delivery port 120 is connected to a smoke delivery pipe 150 one by one.

[0078] As an example, Figure 1 As shown, the smoke delivery pipe 150 is used to introduce the smoke discharged from the smoke delivery port 120 into the smoke inlet of the low-temperature smoke treatment chamber 400. The smoke inlet of the low-temperature smoke treatment chamber 400 is long and extends in the horizontal direction. In order to deliver the smoke into the low-temperature smoke treatment chamber 400 more evenly, the width of the smoke delivery pipe 150 gradually increases from the smoke delivery port 120 to the smoke inlet of the low-temperature smoke treatment chamber 400, so that the width of the outlet end of the smoke delivery pipe 150 is the same as the width of the smoke inlet of the low-temperature smoke treatment chamber 400, so that after the smoke enters the low-temperature smoke treatment chamber 400, it is in uniform contact with the adsorption bed in the low-temperature smoke treatment chamber 400, so that the adsorption effect is better and more uniform.

[0079] like Figure 3 As shown, the smoke inlet pipe 100 is a "progressive contraction" structure, and the smoke inlet pipe 100 includes a plurality of pipe sections connected in sequence in its extension direction, and the inner diameter of the pipe section close to the smoke inlet port 110 is greater than the inner diameter of the pipe section away from the smoke inlet port 110. Specifically, the smoke inlet pipe 100 includes a first pipe section 131, a second pipe section 132, and a third pipe section 133, and the first pipe section 131, the second pipe section 132, and the third pipe section 133 all extend in the vertical direction. The bottom end of the first pipe section 131 is connected to the top end of the second pipe section 132, the top end of the third pipe section 133 is connected to the bottom end of the second pipe section 132, the smoke inlet 110 is opened in the middle of the second pipe section 132, and two smoke outlets 120 are opened on the sides of the two ends of the second pipe section 132, one smoke outlet 120 is opened on the side of the top of the first pipe section 131, and one smoke outlet 120 is opened on the side of the bottom of the third pipe section 133. The four smoke outlets 120 are basically spaced the same in the vertical direction. Part of the smoke entering the smoke inlet pipe 100 from the smoke inlet 110 flows upward, and the other part flows downward. In other alternative embodiments, the positional relationship between the smoke inlet 110 and the smoke outlet 120 can be other ways.

[0080] When the stopper 200 is not provided, the smoke in the smoke inlet pipe 100 is unevenly distributed, which is mainly reflected in that the two smoke delivery ports 120 located in the middle are closer to the smoke inlet port 110, so the flow rate at the two smoke delivery ports 120 in the middle is higher than the flow rate at the top and bottom smoke delivery ports 120, resulting in different flow rates of smoke at the smoke inlets of the four low-temperature smoke treatment chambers 400 (such as Fig. 9 and Fig.10 In order to balance the smoke flow rate at each smoke delivery port 120, a stopper 200 is provided inside the smoke inlet pipe 100. Figure 3 In the illustrated embodiment, the stopper 200 is a cannula 210 , and the cannula 210 is a flared tube.

[0081] Specifically, Figure 3 As shown, a plug 210 is arranged at the top of the second pipe section 132, opposite to the second smoke delivery port 120 from top to bottom in the opening direction of the smoke delivery port 120. The inlet end 211 of the plug 210 is located at the bottom, and the outlet end 212 is located at the top. The outlet end 212 of the plug 210 is sealed and connected to the inner wall surface of the first pipe section 131, and the diameter of the outlet end 121 is the same as the inlet diameter of the bottom end of the first pipe section 131. The inlet end 211 of the plug 210 is located in the second pipe section 132 and there is a gap between the inlet end 211 and the inner wall surface of the second pipe section 132. After the smoke flow flowing upward in the second pipe section 132 encounters the plug 210, a part of the smoke flow enters the gap between the plug 210 and the second short pipe 132, and flows out from the smoke delivery port 120 through the gap, and the other part flows upward through the inlet end 212 of the plug 210 and passes through the plug 210 to the topmost smoke delivery port 120.

[0082] The arrangement of the insert pipe 210 diverts the upwardly flowing smoke flow, so that the smoke enters the interval between the insert pipe 210 and the second pipe section 132 for buffering before being discharged from the upstream smoke delivery port 120 (the second smoke delivery port 120 from top to bottom), thereby reducing the flow rate of the smoke from the upstream smoke delivery port 120 to a certain extent. The insert pipe 210 is trumpet-shaped and the diameter of the inlet end 211 is larger than the diameter of the outlet end 212, so that more smoke can flow to the downstream smoke delivery port 120 (the topmost smoke delivery port) under the guidance of the insert pipe 210, thereby balancing the smoke flow of the two smoke delivery ports 120 located above.

[0083] Another insert pipe 210 is arranged at the bottom of the second pipe section 132, and is opposite to the third smoke delivery port 120 from top to bottom in the opening direction of the smoke delivery port 120. The inlet end 211 of the insert pipe 210 is located at the top, and the outlet end 212 is located at the bottom. The outlet end 212 of the insert pipe 210 is sealed and connected to the inner wall surface of the third pipe section 133, and the diameter of the outlet end 121 is the same as the inlet diameter of the bottom end of the third pipe section 133. The inlet end 211 of the insert pipe 210 is located in the second pipe section 132 and there is a gap between the inlet end 211 and the inner wall surface of the second pipe section 132. After the smoke flow flowing downward in the second pipe section 132 encounters the insert pipe 210, a part of the smoke flow enters the gap between the insert pipe 210 and the second short pipe 132, and flows out from the smoke delivery port 120 through the gap, and the other part passes downward through the inlet end 212 of the insert pipe 210 and flows to the smoke delivery port 120 at the bottom.

[0084] The arrangement of the insert pipe 210 diverts the downwardly flowing smoke flow, so that the smoke enters the interval between the insert pipe 210 and the second pipe section 132 for buffering before being discharged from the upstream smoke delivery port 120 (the third smoke delivery port 120 from top to bottom), thereby reducing the flow rate of the smoke from the upstream smoke delivery port 120 to a certain extent. The insert pipe 210 is trumpet-shaped and the diameter of the inlet end 211 is larger than the diameter of the outlet end 212, so that more smoke can flow to the downstream smoke delivery port 120 (the bottom smoke delivery port) under the guidance of the insert pipe 210, thereby balancing the smoke flow of the two smoke delivery ports 120 located below.

[0085] In summary, the arrangement of the two insert tubes 210 in the smoke inlet pipe 100 balances the smoke airflow velocity at the four smoke delivery ports 120 in the vertical direction, thereby achieving uniform smoke delivery to the four low-temperature smoke treatment chambers 400 stacked in the vertical direction. Fig.11 The inventor simulated 16 low-temperature smoke treatment chambers in the low-temperature adsorption system of the low-temperature smoke delivery system provided by this embodiment through CFD numerical simulation. The smoke inlet pipe 100 sends smoke to four low-temperature smoke treatment chambers 400 stacked in the vertical direction. Fig.11 It can be seen that the distribution of flow in the four low-temperature flue gas treatment chambers 400 distributed in the vertical direction is basically balanced.

[0086] Furthermore, the length of the insert tube 210 matches the height of the smoke delivery port 120, that is, the inlet end 211 of the insert tube 210 is flush with the first edge of the smoke delivery port 120 close to the smoke inlet 110, and the outlet end 212 of the insert tube 210 is flush with the second edge of the smoke delivery port 120 away from the smoke inlet 110. Figure 3 In the illustrated embodiment, the lengths of the two insertion tubes 210 are both 810 mm, and the heights of the smoke delivery ports 120 are both 810 mm.

[0087] As an example, the inner diameter of the first pipe section 131 is 800 mm, the inner diameter of the second pipe section 132 is 1000 mm, and the inner diameter of the third pipe section 133 is 800 mm. The ratio of the outlet diameter to the inlet diameter of the cannula 210 is 4 / 5. Specifically, the inlet diameter of the cannula 210 is 1000 mm, and the outlet diameter is 800 mm.

[0088] exist Figure 4 In the embodiment shown, the smoke inlet pipe 100 extends in the vertical direction and has a smoke inlet port 110 and four smoke delivery ports 120. The smoke inlet pipe 100 is a "progressive contraction" structure, including a first pipe section 131, a second pipe section 132, and a third pipe section 133. The specific structure of the smoke inlet pipe 100 can be referred to above. Figure 3 The illustrated embodiments are not described in detail here, and only the differences are described.

[0089] like Figure 4 As shown, in this embodiment, a stopper 200 is provided inside the smoke inlet pipe 100, and the stopper 200 is an insert tube 210, and the insert tube 210 is a straight tube, that is, the inner diameter of the insert tube 210 is uniformly distributed in its extension direction (vertical direction), in other words, the outlet diameter of the insert tube 210 is equal to its inlet diameter.

[0090] One of the insert pipes 210 is arranged at the top of the second pipe section 132, and is opposite to the second smoke delivery port 120 from top to bottom in the opening direction of the smoke delivery port 120. The outlet end 212 of the insert pipe 210 is sealed and connected to the inner wall surface of the first pipe section 131. The upwardly flowing smoke flow is divided by the insert pipe 210, wherein a part of the smoke flow enters the interval between the insert pipe 210 and the second pipe section 132 for buffering before being discharged from the smoke delivery port 120 to achieve speed reduction, and the other part of the smoke flow is guided by the insert pipe 210 to flow to the topmost smoke delivery port 120, thereby balancing the smoke flow of the two smoke delivery ports 120 located above.

[0091] Another insert pipe 210 is arranged at the bottom of the second pipe section 132, and is opposite to the third smoke delivery port 120 from the top to the bottom in the opening direction of the smoke delivery port 120. The outlet end 212 of the insert pipe 210 is sealed and connected to the inner wall surface of the third pipe section 131. The smoke flow flowing downward is divided by the insert pipe 210, wherein a part of the smoke flow enters the interval between the insert pipe 210 and the second pipe section 132 for buffering before being discharged from the smoke delivery port 120 to achieve speed reduction, and the other part of the smoke flow is guided by the insert pipe 210 to flow to the smoke delivery port 120 at the bottom, thereby balancing the smoke flow of the two smoke delivery ports 120 located below.

[0092] As an example, the inner diameter of the first pipe section 131 is 800 mm, the inner diameter of the second pipe section 132 is 1000 mm, the inner diameter of the third pipe section 133 is 800 mm, and the inner diameter of the cannula 210 is 800 mm.

[0093] exist Figure 5 In the embodiment shown, the smoke inlet pipe 100 extends in the vertical direction and has a smoke inlet port 110 and four smoke delivery ports 120. The smoke inlet pipe 100 is a "progressive contraction" structure, including a first pipe section 131, a second pipe section 132, and a third pipe section 133. The specific structure of the smoke inlet pipe 100 can be referred to above. Figure 3 The illustrated embodiments are not described in detail here, and only the differences are described.

[0094] like Figure 5 As shown, in this embodiment, two stoppers 200 are provided inside the smoke inlet pipe 100, and the stoppers 200 are baffles 220. One baffle 220 is provided at the top of the second pipe section 132, and is opposite to the second smoke delivery port 120 from top to bottom in the opening direction of the smoke delivery port 120. The first end of the baffle 220 away from the smoke inlet port 110 is sealed and connected to the edge of the bottom end of the first pipe section 131 of the smoke inlet pipe 100 close to the smoke delivery port 120, and the second end of the baffle 220 close to the smoke inlet port 110 is spaced apart from the second pipe section 132. The upwardly flowing smoke flow is divided by the baffle 220, wherein a part of the smoke flow enters the interval between the baffle 220 and the second pipe section 132 for buffering before being discharged from the smoke delivery port 120 to achieve deceleration, and the other part of the smoke flow path flows along the first pipe section 131 to the topmost smoke delivery port 120 under the guidance of the baffle 220, thereby balancing the smoke flow of the two smoke delivery ports 120 located above. Another baffle 220 is arranged at the bottom of the second pipe section 132, opposite to the third smoke delivery port 120 from the top to the bottom in the opening direction of the smoke delivery port 120. The first end of the baffle 220 away from the smoke inlet 110 is sealed and connected to the edge of the top of the third pipe section 133 close to the smoke delivery port 120. The downwardly flowing flue gas flow is diverted by the baffle 220, wherein a portion of the flue gas flow enters the gap between the baffle 220 and the second pipe section 132 for buffering before being discharged from the smoke delivery port 120 to achieve speed reduction, and another portion of the flue gas flow, under the guidance of the baffle 220, flows along the third pipe section 133 to the bottom smoke delivery port 120, thereby balancing the smoke flow of the two smoke delivery ports 120 located below.

[0095] like Figure 5 As shown, the baffle 220 is tilted, and the second end of the stopper 200 close to the smoke inlet 110 is relatively far from the first end of the smoke inlet 110 close to the central axis of the second pipe section 132. As an example, the angle between the longitudinal section of the baffle 220 and the extension direction (vertical direction) of the smoke inlet pipe 100 is 10°.

[0096] In other alternative embodiments, the angle between the longitudinal section of the stopper 200 and the extension direction (vertical direction) of the smoke inlet pipe 100 is any angle between 0° and 30°. Preferably, the second end of the stopper 200 close to the smoke inlet 110 is relatively far from the center axis of the first end of the smoke inlet 110 close to the second pipe section 132, so as to avoid too small smoke flow entering the interval after separation due to the narrow interval between the second end of the stopper 200 and the second pipe section 132.

[0097] Furthermore, the baffle 220 is swingably disposed in the smoke inlet pipe 100, that is, the inclination angle of the baffle 220 is adjustable, so that the angle of the baffle 220 can be adjusted at any time according to the smoke distribution at each smoke delivery port 120, so as to balance the smoke flow rate at each smoke delivery port 120. Figure 5 For example, if the smoke flow rate at the two smoke outlets 120 located in the middle is still greater than the smoke flow rate at the top and bottom smoke outlets 120, the angle of the baffle 220 can be appropriately adjusted to reduce the angle between the longitudinal section of the baffle 220 and the extension direction (vertical direction) of the smoke inlet pipe 100, so that the width of the interval between the baffle 220 and the smoke inlet pipe 100 is reduced, the airflow entering the interval after diversion is further reduced, and the flow rate is further slowed down, thereby achieving a balanced flow rate at each smoke outlet 120; if the smoke flow rate at the two smoke outlets 120 located in the middle is less than the smoke flow rate at the top and bottom smoke outlets 120, it means that the interval is too narrow. At this time, the angle between the longitudinal section of the baffle 220 and the extension direction of the smoke inlet pipe 100 is increased to increase the interval width, increase the airflow entering the interval after diversion, and increase the flow rate to a certain extent, thereby achieving a balanced flow rate at each smoke outlet 120.

[0098] It should be noted that the baffle 220 may be movably connected in the smoke inlet pipe 100 by hinge or other known methods.

[0099] exist Figure 6 In the embodiment shown, the smoke inlet pipe 100 extends in the vertical direction and has a smoke inlet port 110 and four smoke delivery ports 120. The smoke inlet pipe 100 is a "continuous contraction" structure, including a gradient section 140, the inner diameter of which gradually decreases from the position close to the smoke inlet port 110 to the position away from the smoke inlet port 110. Figure 6 As shown, the smoke inlet pipe 100 includes two gradient sections 140, one gradient section 140 is located above the smoke inlet 110, and the other gradient section 140 is located below the smoke inlet 110. Two smoke delivery ports 120 spaced apart in the vertical direction are provided on the side of each gradient section 140.

[0100] Two inserting tubes 210 are provided in the smoke inlet pipe 100. The two inserting tubes 210 are respectively arranged in the two gradient sections 140 and are respectively opposite to the two smoke delivery ports 120 located in the middle. Figure 6 As shown, the top end (outlet end) of the upper cannula 210 is connected to the inner wall surface of the upper gradient section 140 and extends downward, and there is a gap between the bottom end of the cannula 210 and the gradient section 140. The bottom end (outlet end) of the lower cannula 210 is connected to the inner wall surface of the lower gradient section 140 and extends upward, and there is a gap between the bottom end of the cannula 210 and the gradient section 140.

[0101] The insert 210 diverts the airflow in the smoke inlet pipe 100, which reduces the smoke flow rate at the two smoke outlets 120 located in the middle to a certain extent, balances the smoke flow rate at each smoke outlet 120, and further optimizes the uniformity of the airflow distribution in the low-temperature smoke treatment chamber 400, making the smoke flow in each low-temperature smoke treatment chamber 400 more uniform and the smoke treatment effect better.

[0102] exist Figure 7 In the illustrated embodiment, the smoke inlet pipe 100 extends in the vertical direction, and has a smoke inlet 110 and three smoke delivery ports 120. The smoke inlet pipe 100 is a "progressive contraction" structure, including a first pipe section 131, a second pipe section 132, and a third pipe section 133. The first pipe section 131, the second pipe section 132, and the third pipe section 133 are connected in sequence from top to bottom, and the inner diameters increase in sequence. The smoke inlet 110 is located at the bottom of the third pipe section 133, and a smoke delivery port 120 is provided on the side of the top of the first pipe section 131, the second pipe section 132, and the third pipe section 133. After the smoke enters the smoke inlet pipe 100 from the smoke inlet 110 at the bottom, it flows upward and is discharged from the three smoke delivery ports 120 in sequence. That is to say, along the flow direction of the smoke, the inner diameter of the smoke inlet pipe 100 gradually decreases to balance the flow rate of the smoke discharged from each smoke delivery port 120 to a certain extent.

[0103] In order to further achieve the balance of airflow velocity, two of the three smoke delivery ports 120 located at the bottom are each provided with a corresponding insert pipe 210. The top end (exit end) of the insert pipe 210 located at the top is sealed and connected to the bottom end of the first pipe section 131, and the top end (exit end) of the insert pipe 210 located at the bottom is sealed and connected to the bottom end of the second pipe section 132. After the smoke flow in the third pipe section 133 is diverted by the insert pipe 210 located at the bottom, a part of the smoke is discharged from the bottom smoke delivery port 120, and the other part of the smoke enters the second pipe section 132 upward. After the smoke flow in the second pipe section 132 is diverted by the insert pipe 210 located at the top, a part of the smoke is discharged from the middle smoke delivery port 120, and the other part of the smoke enters the first pipe section 131 upward. The provision of the insert pipe 210 achieves the balance of the smoke flow velocity at the three smoke delivery ports 120.

[0104] exist Figure 1 and 8In the illustrated embodiment, the low-temperature smoke delivery system includes four smoke inlet pipes 100 and a main smoke duct 300. The main smoke duct 300 is horizontally arranged to deliver smoke to four smoke inlet pipes 100 that are spaced apart in the horizontal direction. The main smoke duct 300 has an inlet 330 and four outlets 340. The smoke in the main smoke duct 300 flows in a direction from the inlet 330 to a direction away from the inlet 330.

[0105] The main flue 300 is a "progressive contraction" structure. The main flue 300 includes four pipes 310 connected in sequence in its extension direction. The inner diameter of the pipe 310 close to the inlet 330 of the main flue 300 is larger than the inner diameter of the pipe 310 far from the inlet 330. The inlet 330 of the main flue 300 is arranged at the end of the pipe 310 with the largest inner diameter far from other pipes 310. The four outlets 340 are respectively arranged on the side walls of the four pipes 310 far from the inlet 330, and the four outlets 340 have the same size. As an example, the inner diameters of the four pipes 310 are 3000mm, 2300mm, 1700mm, and 1000mm respectively.

[0106] In view of the problem that the flow rate of the outlet 340 farthest from the inlet 330 in the original design is obviously too large, such as Figure 8 As shown, a throttling ring 320 is provided in the main flue 300. The throttling ring 320 is located at the inlet of the pipe 310 with the smallest inner diameter. The throttling ring 320 is connected to the inner wall surface of the smallest pipe 310 and extends inwardly. The width of the throttling ring 320 is 150 mm. The throttling ring 320 is used to intercept the smoke and reduce the smoke flow entering the pipe 310, thereby balancing the smoke in the main flue 300.

[0107] Fig.11 The inventors conducted CFD numerical simulations on 16 low-temperature flue gas treatment chambers in a low-temperature adsorption system using the low-temperature flue gas delivery system provided in this embodiment. The main flue 300 delivers smoke to four smoke inlet pipes 100 that are spaced apart in the horizontal direction. Fig.11 It can be seen that after optimization, the flue gas velocity distribution of each smoke inlet pipe 100 is uniform, and the uniformity of the average velocity distribution at the inlet of each low-temperature flue gas treatment chamber 400 is significantly improved.

[0108] exist Figure 1 and Figure 2 In the embodiment shown, the low-temperature adsorption system includes a low-temperature smoke delivery system and sixteen low-temperature smoke processing chambers 400. The low-temperature smoke delivery system includes four smoke inlet pipes 100 and a main smoke duct 300. The smoke inlet pipe 100 extends in the vertical direction and is used to deliver smoke to four low-temperature smoke processing chambers 300 stacked in the vertical direction. The four smoke inlet pipes 100 are spaced apart in the horizontal direction, and the main smoke duct 300 delivers smoke to the four smoke inlet pipes 100. Figure 2 and 3As shown, a stopper 200 is provided in the smoke inlet pipe 100. Figure 2 and Figure 8 As shown, a throttling ring 320 is provided in the main flue 300 .

[0109] The inventor Figure 1 and Figure 2 The low temperature adsorption system in the embodiment shown in the figure is subjected to CFD numerical simulation, and the results are shown in FIG. Figure 11-13 As shown. Fig.11 It can be seen from the figure that after optimization, the smoke flow velocity distribution of each smoke inlet pipe 100 is uniform, and the smoke flow rate at the smoke inlet of each low-temperature smoke treatment chamber 400 is uniform. Fig.12 As shown, the maximum flow deviation at the flue gas inlet of the sixteen low-temperature flue gas treatment chambers 400 is 2.9%, which meets the design requirements. Fig.13 As shown, the cross-sectional velocity uniformity coefficients of the adsorption beds in the sixteen low-temperature flue gas treatment chambers 400 are all greater than 0.85, meeting the design requirements.

[0110] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0111] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0112] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0113] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0114] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0115] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A low-temperature flue gas delivery system, characterized in that: include: A smoke inlet pipe, the smoke inlet pipe having a smoke inlet and a plurality of smoke delivery ports, the plurality of smoke delivery ports being arranged at intervals in the extension direction of the smoke inlet pipe, the smoke inlet pipe being progressively or continuously contracted from the smoke inlet along the flow direction of the low-temperature smoke toward each smoke delivery port, the temperature of the low-temperature smoke being below room temperature; A stopper, wherein the stopper is located in the smoke inlet pipe and connected to the inner wall surface of the smoke inlet pipe, the stopper is arranged at at least one smoke delivery port adjacent to the smoke inlet port among the multiple smoke delivery ports, and there is a gap between at least a portion of the stopper and the smoke delivery port, and the stopper is used for diverting the flow so that a portion of the airflow in the smoke inlet pipe enters the smoke delivery port through the gap, and another portion of the airflow flows to the downstream smoke delivery port.

2. The low-temperature flue gas delivery system according to claim 1, characterized in that: The stopper is a plug extending along the smoke inlet pipe, and has an inlet end relatively close to the smoke inlet port and an outlet end relatively far from the smoke inlet port in the extending direction of the smoke inlet pipe, and the outlet end of the plug is connected to the inner wall surface of the smoke inlet pipe.

3. The low-temperature flue gas delivery system according to claim 2, characterized in that: The cannula is a trumpet tube, and the cannula contracts from the inlet end to the outlet end.

4. The low-temperature flue gas delivery system according to claim 2, characterized in that: The ratio of the outlet diameter to the inlet diameter of the bell tube is 3 / 5-4 / 5.

5. The low-temperature flue gas delivery system according to any one of claims 2 to 4, characterized in that: The smoke inlet pipe includes a plurality of pipe sections connected in sequence in its extending direction, the inner diameter of the pipe section close to the smoke inlet is larger than the inner diameter of the pipe section far from the smoke inlet, the insert pipe is arranged in the pipe section with the larger inner diameter of two adjacent pipe sections, and the outlet end of the insert pipe is connected to the pipe section with the smaller inner diameter; Alternatively, at least a portion of the smoke inlet pipe is a gradient section, and the inner diameter of the gradient section gradually decreases from a portion close to the smoke inlet port to a portion far away from the smoke inlet port.

6. The low-temperature flue gas delivery system according to any one of claims 2 to 4, characterized in that: The length of the insert tube in the extension direction of the smoke inlet pipe is the same as the length of the smoke delivery port in the extension direction of the smoke inlet pipe, the inlet end of the insert tube is flush with a first edge of the smoke delivery port in the extension direction of the smoke inlet pipe close to the smoke inlet, and the outlet end of the insert tube is flush with a second edge of the smoke delivery port in the extension direction of the smoke inlet pipe far from the smoke inlet.

7. The low-temperature flue gas delivery system according to claim 1, characterized in that: The stopper is a baffle having a first end away from the smoke inlet and a second end close to the smoke inlet, and the first end of the baffle is connected to the inner wall surface of the smoke inlet pipe.

8. The low-temperature flue gas delivery system according to claim 1 or 7, characterized in that: There are multiple smoke inlet pipes, which are arranged in parallel and extend in the vertical direction. The low-temperature smoke delivery system also includes a horizontally arranged main smoke duct, which is connected to the smoke inlets of the multiple smoke inlet pipes. The main smoke duct shrinks progressively or continuously along the flow direction of the smoke toward each of the smoke inlets.

9. The low-temperature flue gas delivery system according to claim 8, characterized in that: The main flue includes a plurality of pipes connected in sequence in its extension direction, the inner diameter of the pipe close to the inlet of the main flue is larger than the inner diameter of the pipe far from the inlet of the main flue, and the low-temperature flue gas delivery system also includes a throttling ring, which is arranged at least at the inlet of the pipe with the smallest inner diameter among the multiple pipes.

10. A low temperature adsorption system, characterized in that: include: A flue gas cooling tower, wherein the flue gas cooling tower is used to cool the flue gas into low-temperature flue gas having a temperature below room temperature; A plurality of low-temperature flue gas treatment chambers arranged in parallel, each of which has a flue gas inlet and a flue gas outlet; According to the low-temperature flue gas conveying system according to any one of claims 1 to 9, the flue gas cooling tower is connected to the smoke inlet of the low-temperature flue gas conveying system, and the multiple smoke delivery ports of the low-temperature flue gas conveying system are connected one-to-one with the smoke inlets of the multiple low-temperature flue gas treatment bins to deliver the low-temperature flue gas into the low-temperature flue gas treatment bins.

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