Regeneration tower with anti-blocking function

Abstract

The invention relates to the technical field of regeneration towers and discloses a regeneration tower which comprises a tower body and a blowing pipe, the tower body is provided with a preheating section, a heating section and a cooling section from top to bottom, the heating section is communicated with the preheating section and the cooling section, an adsorbent inlet is formed in the top end of the preheating section, and an adsorbent outlet is formed in the top end of the cooling section. The preheating section is provided with a regeneration rich gas outlet, the heating section is provided with a regeneration rich gas outlet, the bottom end of the cooling section is provided with an adsorbent outlet, the preheating section is used for preheating an adsorbent, the heating section is used for heating, desorbing and regenerating the adsorbent preheated by the preheating section, and the cooling section is used for cooling the adsorbent regenerated by the heating section to a preset temperature. The injection pipe is arranged on the preheating section, and the outlet end of the injection pipe is arranged in the preheating section and used for injecting gas into the preheating section. The regeneration tower provided by the embodiment of the invention has the advantages of anti-blocking function and high adsorbent regeneration efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of regeneration towers, and in particular to a regeneration tower with an anti-blocking function in a preheating section. Background Art

[0002] The flue gas discharged from the coal-fired boiler is generally desulfurized and denitrated by an adsorption tower. Specifically, the flue gas discharged from the coal-fired boiler enters the adsorption tower, and the sulfide and nitride in the flue gas are absorbed by the adsorbent in the adsorption tower. The saturated adsorbent is transported to the regeneration tower for heating and desorption. The sulfide and nitride are desorbed from the adsorbent and recycled, and the adsorbent is regenerated. The regenerated adsorbent returns to the adsorption tower to continue to adsorb the sulfide and nitride in the flue gas. Therefore, the sulfide and nitride in the flue gas are continuously removed by circulating the adsorbent between the adsorption tower and the regeneration tower.

[0003] In the related art, there is an adsorbent inlet at the top of the regeneration tower, and the adsorbent first enters the preheating section of the tower body through the adsorbent inlet for preheating. However, due to the certain interaction force between the adsorbents, blockage is prone to occur in the preheating section, resulting in low adsorbent regeneration efficiency. Summary of the invention

[0004] 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 regeneration tower so that the regeneration tower of the present invention has the advantages of anti-blocking function and high adsorbent regeneration efficiency.

[0005] The regeneration tower of the embodiment of the present invention comprises a tower body and a blowing pipe, wherein the tower body is provided with a preheating section, a heating section and a cooling section from top to bottom, wherein the heating section is connected to the preheating section and the cooling section, wherein the top of the preheating section has an adsorbent inlet, the heating section has a regenerated rich gas outlet, and the bottom of the cooling section has an adsorbent outlet, wherein the preheating section is used for preheating the adsorbent, wherein the heating section is used for heating and desorbing the adsorbent preheated by the preheating section for regeneration, and wherein the cooling section is used for cooling the adsorbent regenerated by the heating section to a preset temperature;

[0006] The blowing pipe is arranged on the preheating section and the outlet end of the blowing pipe is placed in the preheating section, and is used for blowing gas into the preheating section.

[0007] In the regeneration tower of the present invention, when the adsorbent is blocked in the preheating section during the unloading process due to a certain interaction force between the adsorbents, compressed gas is sprayed into the preheating section through a spray pipe, and preferably, the compressed gas can be nitrogen. Since the compressed gas has a certain pressure, it will be sprayed into the gaps between the adsorbents to reduce the interaction force between adjacent adsorbents, so that the adsorbents can be unloaded smoothly under the action of their own gravity, and the problem of blockage of the adsorbent in the preheating section due to excessive interaction force can be avoided, and the problem of stopping the regeneration tower preheating section for unblocking due to blockage can be avoided, which not only saves human and material resources and costs, but also greatly improves the regeneration efficiency of the adsorbent in the regeneration tower.

[0008] Optionally, the outlet end of the blowing pipe is tilted upward. When the compressed gas enters the preheating section through the blowing pipe, it will give the adsorbent a vertical upward component force, which can greatly reduce the force between two adjacent adsorbents in the vertical direction, avoid blockage caused by a large amount of adsorbents piled up in the vertical direction, so that after the lower adsorbent is unloaded, the upper adsorbent can be unloaded smoothly, which is further conducive to improving the anti-blocking effect.

[0009] Optionally, the angle between the blowing pipe and the horizontal plane is 20°-40°. This is convenient for cooperating with the adsorbent so that the adsorbent in the preheating section can be turned upside down in the preheating section, so that the adsorbent has a certain suspension effect, thereby further reducing the force between adjacent adsorbents in the up and down directions, which is further conducive to improving the anti-blocking effect of the regeneration tower.

[0010] Optionally, the number of the blowing pipes is multiple, and the multiple blowing pipes are arranged at intervals along the circumference of the tower body. The regeneration tower of the present invention increases the blowing area of ​​the blowing pipe by arranging multiple blowing pipes, so that each adsorbent in the preheating section of the regeneration tower can be blown by compressed gas, thereby reducing the force between each adjacent adsorbent, which is further conducive to improving the anti-blocking effect.

[0011] Optionally, the ratio of the diameter of the blowing pipe to the diameter of the tower body is 1 / 15-1 / 20. The diameter of the blowing pipe is adapted to the diameter of the regeneration tower to avoid affecting the blowing effect of the compressed gas due to the diameter of the blowing pipe being too large or too small, which is conducive to improving the working reliability of the blowing pipe.

[0012] Optionally, a first buffer section is provided between the preheating section and the heating section, and the first buffer section is connected to the preheating section and the heating section, respectively. The adsorbent flowing out of the preheating section can play a buffering role in the first buffer section, so that the adsorbent can smoothly flow downward into the heating section, further improving the anti-blocking effect. In addition, due to the different temperatures between the preheating section and the heating section, the heating section requires a higher temperature for adsorbent desorption and regeneration, and the preheating section requires a lower temperature heat exchange medium for cooling the adsorbent. The adsorbent in the first buffer section can isolate the preheating section and the heating section, prevent the temperatures between the preheating section and the heating section from affecting each other, and help improve the working reliability of the preheating section and the heating section.

[0013] Optionally, there is a second buffer section between the heating section and the cooling section, and the second buffer section is connected to the heating section and the cooling section respectively. The adsorbent flowing out of the heating section can play a buffering role in the first buffer section, so that the adsorbent can smoothly flow downward into the cooling section, which is further beneficial to improve the anti-blocking effect. In addition, due to the different temperatures between the heating section and the cooling section, the cooling section requires a higher temperature for adsorbent desorption and regeneration, and the heating section requires a lower temperature heat exchange medium for cooling the adsorbent. The adsorbent in the first buffer section can isolate the heating section and the cooling section to prevent the temperatures between the heating section and the cooling section from affecting each other, which is beneficial to improve the working reliability of the heating section and the cooling section.

[0014] Optionally, the cooling section has a cooling gas inlet, which is used to transport cooling gas into the cooling section to cool the adsorbent after heating, desorption and regeneration in the heating section to a preset temperature. The cooling gas enters the cooling section through the cooling gas inlet and can directly contact the adsorbent for heat exchange, which is beneficial to improve the heat exchange efficiency between the cooling gas and the adsorbent, thereby improving the cooling efficiency of the adsorbent and improving the regeneration efficiency of the adsorbent.

[0015] Optionally, the cooling gas is room temperature air, so that the cooling gas is easily available, which helps to save gas source costs.

[0016] Optionally, the cooling gas in the cooling section cools the adsorbent to 15° C.-35° C. The cooling time and cooling temperature of the adsorbent are taken into consideration to improve the regeneration efficiency and adsorption effect of the adsorbent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the regeneration tower of the embodiment of the present invention.

[0018] Reference numerals:

[0019] 100. Regeneration tower; 1. Tower body; 101. Preheating section; 102. Heating section; 103. Cooling section; 104. Adsorbent inlet; 105. Regeneration rich gas outlet; 106. Adsorbent outlet; 107. First buffer section; 108. Second buffer section; 109. Cooling gas inlet; 2. Injection pipe. DETAILED DESCRIPTION

[0020] 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.

[0021] The technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0022] like Figure 1 As shown, the regeneration tower 100 of the embodiment of the present invention includes a tower body 1 and a spray pipe 2. The tower body 1 is arranged with a preheating section 101, a heating section 102 and a cooling section 103 from top to bottom, and the heating section 102 is connected to the preheating section 101 and the cooling section 103. The top of the preheating section 101 has an adsorbent inlet 104, the heating section 102 has a regenerated rich gas outlet 105, and the bottom of the cooling section 103 has an adsorbent outlet 106. The preheating section 101 is used to preheat the adsorbent, the heating section 102 is used to heat the adsorbent preheated in the preheating section 101 for desorption and regeneration, and the cooling section 103 is used to cool the adsorbent regenerated in the heating section 102 to a preset temperature. The spray pipe 2 is arranged on the preheating section 101 and the outlet end of the spray pipe 2 is placed in the preheating section 101, and is used to spray gas into the preheating section 101.

[0023] For example, Figure 1 As shown, a hopper for unloading is provided above the tower body 1, and a unloading pipe is provided between the hopper and the adsorbent inlet 104 of the tower body 1. The adsorbent in the hopper is the adsorbent saturated in the adsorption tower, and enters the preheating section 101 of the regeneration tower 100 through the adsorbent inlet 104. The preheating section 101 preheats the adsorbent saturated, and the preheated adsorbent saturated rises to a certain temperature, such as 80°C-100°C. By preheating the adsorbent saturated, the adsorbent saturated can be quickly heated up and desorbed in the heating section 102, which is beneficial to improve the regeneration efficiency of the adsorbent.

[0024] When the adsorbent is blocked in the preheating section 101 during the unloading process due to a certain interaction force between the adsorbents, compressed gas is sprayed into the preheating section 101 through the spray pipe 2. Preferably, the compressed gas can be nitrogen. Since the compressed gas has a certain pressure, it will be sprayed into the gaps between the adsorbents to reduce the interaction force between adjacent adsorbents, so that the adsorbents can be unloaded smoothly under the action of their own gravity, which can avoid the problem of blockage of the adsorbent in the preheating section 101 due to excessive interaction force, and can avoid the problem of stopping the regeneration tower 100 preheating section 101 for unblocking due to blockage, which not only saves human and material resources and costs, but also greatly improves the regeneration efficiency of the adsorbent in the regeneration tower 100.

[0025] The preheated adsorbent saturated with adsorption is heated to about 350°C in the heating section 102. The adsorbent saturated with adsorption is desorbed at the heating temperature to generate regenerated rich gas (containing nitrogen oxides and sulfides). The regenerated rich gas generated in the heating section 102 is discharged from the heating section 102 through the regenerated rich gas outlet 105. The desorbed and regenerated adsorbent enters the cooling section 103 for cooling, and then is discharged through the adsorbent outlet 106 and returned to the adsorption tower for recycling. For the cooled adsorbent, the adsorption capacity of the adsorbent will be increased exponentially, which is beneficial to improving the adsorption purification rate.

[0026] Therefore, the regeneration tower 100 according to the embodiment of the present invention has the advantages of anti-blocking function and high adsorbent regeneration efficiency.

[0027] It should be noted that the adsorbent can be filled inside the breathable shell for adsorption. The adsorbent can be a granular or powdered adsorbent, or an adsorbent body made of a powder or granular adsorbent, such as a spherical body or a cylinder formed by a powder or granular adsorbent through a binder, etc. Of course, a protective shell can be further formed outside the adsorbent body, such as a breathable film covering the outside of the adsorbent body, to improve the strength of the adsorbent body.

[0028] In some embodiments, the outlet end of the blowing pipe 2 is tilted upward.

[0029] For example, Figure 1 As shown, the regeneration tower 100 of the present invention is arranged to tilt the outlet end of the blowing pipe 2 upward. When the compressed gas enters the preheating section 101 through the blowing pipe 2, it will give the adsorbent a vertical upward component force, which can greatly reduce the force between two adjacent adsorbents in the up and down directions, avoid blockage caused by too much adsorbent accumulated in the up and down directions, so that after the lower adsorbent is unloaded, the upper adsorbent can be unloaded smoothly, which is further beneficial to improve the anti-blocking effect.

[0030] Optionally, the angle between the blowing pipe 2 and the horizontal plane is 20°-40°.

[0031] For example, the angle between the spray pipe 2 and the horizontal plane can be 20°, 30° or 40°. The regeneration tower 100 of the present invention sets the angle between the spray pipe 2 and the horizontal plane to 20°-40°, so that the adsorbent in the preheating section 101 can be turned upside down in the preheating section 101 by cooperating with the adsorbent, so that the adsorbent has a certain suspension effect, thereby further reducing the force between adjacent adsorbents in the up and down directions, which is further conducive to improving the anti-blocking effect of the regeneration tower 100.

[0032] In some embodiments, there are multiple blowing pipes 2 , and the multiple blowing pipes 2 are arranged at intervals along the circumference of the tower body 1 .

[0033] For example, the number of the blowing pipes 2 is four, and the four blowing pipes are evenly spaced along the circumference of the tower body 1 , that is, the angle between two adjacent blowing pipes 2 is 90°.

[0034] It can be understood that since the diameter of the regeneration tower 100 is relatively large, the regeneration tower 100 of the present invention increases the blowing area of ​​the blowing pipe 2 by setting up multiple blowing pipes 2, so that each adsorbent in the preheating section 101 of the regeneration tower 100 can be blown by compressed gas, thereby reducing the force between each adjacent adsorbent, which is further beneficial to improving the anti-blocking effect.

[0035] In some embodiments, the ratio of the diameter of the blowing pipe 2 to the diameter of the tower body 1 is 1 / 15-1 / 20.

[0036] For example, the diameter of the regeneration tower 100 is 2m, and the diameter of the blowing pipe 2 can be 100mm or 120mm. The regeneration tower 100 of the present invention makes the ratio of the diameter of the blowing pipe 2 to the diameter of the tower body 1 to be 1 / 15-1 / 20, so that the diameter of the blowing pipe 2 is adapted to the diameter of the regeneration tower 100, thereby avoiding the blowing effect of the compressed gas being affected by the diameter of the blowing pipe 2 being too large or too small, and is conducive to improving the working reliability of the blowing pipe 2.

[0037] In some embodiments, a first buffer section 107 is provided between the preheating section 101 and the heating section 102 , and the first buffer section 107 is connected to the preheating section 101 and the heating section 102 , respectively.

[0038] like Figure 1As shown, the regeneration tower 100 of the embodiment of the present invention is provided with a first buffer section 107 between the preheating section 101 and the heating section 102. The adsorbent flowing out of the preheating section 101 can play a buffering role in the first buffer section 107, so that the adsorbent can smoothly flow downward into the heating section 102, further improving the anti-blocking effect. In addition, due to the different temperatures between the preheating section 101 and the heating section 102, the heating section 102 requires a higher temperature for adsorbent desorption and regeneration, and the preheating section 101 requires a lower temperature heat exchange medium for adsorbent cooling. The adsorbent in the first buffer section 107 can isolate the preheating section 101 and the heating section 102, prevent the temperatures between the preheating section 101 and the heating section 102 from affecting each other, and help improve the working reliability of the preheating section 101 and the heating section 102.

[0039] In some embodiments, a second buffer section 108 is provided between the heating section 102 and the cooling section 103 , and the second buffer section 108 is connected to the heating section 102 and the cooling section 103 , respectively.

[0040] like Figure 1 As shown, the regeneration tower 100 of the embodiment of the present invention is provided with a first buffer section 107 between the heating section 102 and the cooling section 103. The adsorbent flowing out of the heating section 102 can play a buffering role in the first buffer section 107, so that the adsorbent can smoothly flow downward into the cooling section 103, which is further conducive to improving the anti-blocking effect. In addition, due to the different temperatures between the heating section 102 and the cooling section 103, the cooling section 103 requires a higher temperature for adsorbent desorption and regeneration, and the heating section 102 requires a lower temperature heat exchange medium for cooling the adsorbent. The adsorbent in the first buffer section 107 can isolate the heating section 102 and the cooling section 103, prevent the temperatures between the heating section 102 and the cooling section 103 from affecting each other, and is conducive to improving the working reliability of the heating section 102 and the cooling section 103.

[0041] In some embodiments, the cooling section 103 has a cooling gas inlet 109, which is used to deliver cooling gas into the cooling section 103 to cool the adsorbent after heating, desorption and regeneration in the heating section 102 to a preset temperature.

[0042] Since the cooling gas enters the cooling section 103 through the cooling gas inlet 109 and can directly contact the adsorbent for heat exchange, it is beneficial to improve the heat exchange efficiency between the cooling gas and the adsorbent, thereby improving the cooling efficiency of the adsorbent and improving the regeneration efficiency of the adsorbent.

[0043] Optionally, the cooling gas is room temperature air, so that the cooling gas is easily obtained, which is helpful to save gas source costs.

[0044] In some embodiments, the cooling gas in the cooling section 103 cools the adsorbent to 15°C-35°C.

[0045] For example, the cooling gas in the cooling section 103 cools the adsorbent to 15° C., 20° C., or 35° C. It is understandable that the lower the temperature of the adsorbent is, the better the adsorption effect in the adsorption tower will be. Therefore, the lower the temperature of the adsorbent is cooled by room temperature air, the better. However, the lower the cooling temperature, the longer the time required. Therefore, the adsorbent is cooled to 15° C.-35° C., taking into account the cooling time and cooling temperature of the adsorbent, so as to improve the regeneration efficiency and adsorption effect of the adsorbent.

[0046] 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A regeneration tower with anti-blocking function, characterized in that: include: A tower body, wherein the tower body is arranged with a preheating section, a heating section and a cooling section from top to bottom, the heating section is connected with the preheating section and the cooling section, the top of the preheating section is provided with an adsorbent inlet, the heating section is provided with a regenerated rich gas outlet, the bottom of the cooling section is provided with an adsorbent outlet, the preheating section is used for preheating the adsorbent, the heating section is used for heating and desorbing the adsorbent preheated by the preheating section for regeneration, and the cooling section is used for cooling the adsorbent regenerated by the heating section to a preset temperature; and A blowing pipe is arranged on the preheating section and an outlet end of the blowing pipe is placed in the preheating section, and is used for blowing gas into the preheating section.

2. The regeneration tower with anti-blocking function according to claim 1, characterized in that: The outlet end of the blowing pipe is arranged to be inclined upward.

3. The regeneration tower with anti-blocking function according to claim 2, characterized in that: The angle between the blowing pipe and the horizontal plane is 20°-40°.

4. The regeneration tower with anti-blocking function according to claim 1, characterized in that: There are multiple blowing pipes, and the multiple blowing pipes are arranged at intervals along the circumference of the tower body.

5. The regeneration tower with anti-blocking function according to claim 1, characterized in that: The ratio of the diameter of the blowing pipe to the diameter of the tower body is 1 / 15-1 / 20.

6. The regeneration tower with anti-blocking function according to claim 1, characterized in that: A first buffer section is provided between the preheating section and the heating section, and the first buffer section is communicated with the preheating section and the heating section respectively.

7. The regeneration tower with anti-blocking function according to claim 6, characterized in that: A second buffer section is provided between the heating section and the cooling section, and the second buffer section is communicated with the heating section and the cooling section respectively.

8. The regeneration tower with anti-blocking function according to claim 1, characterized in that: The cooling section is provided with a cooling gas inlet, and the cooling gas inlet is used to transport cooling gas into the cooling section to cool the adsorbent after heating, desorption and regeneration in the heating section to a preset temperature.

9. The regeneration tower with anti-blocking function according to claim 8, characterized in that: The cooling gas is room temperature air.

10. The regeneration tower with anti-blocking function according to claim 9, characterized in that: The cooling gas in the cooling section cools the adsorbent to 15°C-35°C.

Images