CN211913231U - Adsorption device - Google Patents
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- CN211913231U CN211913231U CN201921469626.1U CN201921469626U CN211913231U CN 211913231 U CN211913231 U CN 211913231U CN 201921469626 U CN201921469626 U CN 201921469626U CN 211913231 U CN211913231 U CN 211913231U
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Abstract
The utility model discloses an adsorber, include: an adsorber body comprising: an adsorption space; the upper end enclosure is provided with an active carbon inlet and a gas outlet; the outer accompanying pipe is arranged around the outer wall of the adsorption space; the lower end enclosure is provided with an active carbon outlet, a plurality of openings and a plurality of inlets for gas to be adsorbed; a spigot-and-socket sleeve assembly comprising: the branch pipe comprises an inner branch pipe and an outer branch pipe, the inner branch pipe is vertically communicated with the inner main pipe, and the outer branch pipe is vertically communicated with the outer main pipe; the long straight pipe comprises a long straight pipe inner sleeve and a long straight pipe outer sleeve, the long straight pipe inner sleeve is vertically communicated with the inner supporting pipe through a socket structure, and the long straight pipe outer sleeve is vertically communicated with the outer supporting pipe; the heat exchange sleeve comprises a heat exchange inner sleeve and a heat exchange outer sleeve, the heat exchange inner sleeve is vertically communicated with the long straight inner sleeve through a socket structure, one end of the heat exchange outer sleeve is vertically communicated with the long straight outer sleeve, and the heat exchange sleeve is inserted into the adsorber main body.
Description
Technical Field
The utility model belongs to the technical field of the active carbon regeneration, particularly, the utility model relates to an adsorber.
Background
At present, the improved Siemens method is mainly adopted for the production of the polycrystalline silicon. In the process of producing the polycrystalline silicon by the improved Siemens method, trichlorosilane and hydrogen react at high temperature (about 1050 ℃), and the polycrystalline silicon is generated by deposition. Therefore, the purity of the raw material trichlorosilane and hydrogen directly determines the quality of the product polycrystalline silicon.
The method is mainly realized by adsorbing and recovering impurities in the hydrogen by using the activated carbon under the conditions of low temperature and high pressure, regenerating the activated carbon by using a high-temperature low-pressure mode after the activated carbon is saturated by adsorption, and mainly by introducing a high-temperature heating medium to heat the activated carbon and purging the activated carbon by using the hydrogen. The thoroughness of the regeneration of the activated carbon is directly related to the removal rate of boron, phosphorus, carbon, oxygen, nitrogen and other metal impurities in the recovered hydrogen and the purity of the hydrogen. An important factor affecting the regeneration of the adsorbent is the internal structural form of the activated carbon adsorber. The internal structure of the activated carbon adsorber directly affects the internal temperature field and the heat conduction efficiency, and further affects the activated carbon adsorption effect. However, practice proves that the regeneration temperature of the activated carbon is still difficult to achieve by improving the internal structure of the activated carbon adsorber.
Therefore, the existing technology for activated carbon regeneration is in need of further improvement.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the present invention is to provide an adsorber. By adopting the absorber, the risk of heat source medium leakage can be effectively reduced, and meanwhile, under the combined action of the second heat medium in the outer accompanying pipe and the first heat medium in the socket-type sleeve assembly, the heat transfer and heat exchange efficiency in the absorber main body can be effectively improved, so that the temperature distribution in the absorber is uniform.
In an aspect of the present invention, the utility model provides an adsorber, according to the utility model discloses an embodiment, this adsorber includes:
an adsorber body, the adsorber body comprising:
an adsorption space;
the upper end enclosure is positioned at the upper part of the adsorber main body and is connected with the top of the adsorption space, and an activated carbon inlet and a gas outlet are formed in the upper end enclosure;
an outer accompanying pipe disposed around an outer wall of the adsorption space, the outer accompanying pipe having a second heat medium inlet and a second heat medium outlet;
the lower end enclosure is positioned at the lower part of the adsorber main body and is connected with the bottom of the adsorption space, and the lower end enclosure is provided with an activated carbon outlet, a plurality of openings and a plurality of to-be-adsorbed gas inlets;
socket joint formula thimble assembly, socket joint formula thimble assembly includes:
the main pipe comprises an inner main pipe and an outer main pipe, the inner main pipe and the outer main pipe are of an inner-outer sleeve type double-layer structure, the inner main pipe is provided with a first heat medium inlet, the outer main pipe is provided with a first heat medium outlet, or the outer main pipe is provided with a first heat medium inlet, and the inner main pipe is provided with a first heat medium outlet;
the branch pipe comprises an inner branch pipe and an outer branch pipe, the inner branch pipe and the outer branch pipe are of an inner-outer sleeve type double-layer structure, the inner branch pipe is vertically communicated with the inner main pipe, and the outer branch pipe is vertically communicated with the outer main pipe;
the long straight pipe comprises a long straight pipe inner sleeve and a long straight pipe outer sleeve, the long straight pipe inner sleeve and the long straight pipe outer sleeve are of an inner sleeve and outer sleeve double-layer structure, the long straight pipe inner sleeve and the inner support pipe are vertically communicated by adopting a socket structure, first pipe caps are arranged at two ends of the long straight pipe, and the long straight pipe outer sleeve and the outer support pipe are vertically communicated;
the heat exchange sleeve comprises a heat exchange inner sleeve and a heat exchange outer sleeve, the heat exchange inner sleeve and the heat exchange outer sleeve are of an inner sleeve and outer sleeve double-layer structure, the heat exchange inner sleeve and the long straight tube inner sleeve are vertically communicated by adopting a socket structure, one end of the heat exchange outer sleeve is provided with a second tube cap, the other end of the heat exchange outer sleeve is vertically communicated with the long straight tube outer sleeve, and the heat exchange sleeve axially penetrates through the opening of the lower end socket and is inserted into the absorber body;
the skirt is connected with the adsorber main body.
According to the adsorber provided by the embodiment of the utility model, the adsorber can remarkably reduce the volume of the socket-and-spigot type sleeve pipe assembly in the adsorber by adopting the main pipe, the branch pipe, the long flat pipe and the heat exchange sleeve pipe which are of an inner and outer sleeve pipe type double-layer structure, thereby saving space and effectively reducing the installation height of the skirt; the long straight pipe inner sleeve and the inner branch pipe, and the long straight pipe inner sleeve and the heat exchange inner sleeve are connected by adopting a socket structure, so that the assembly and disassembly are convenient, the welding seams for connecting the heat exchange inner sleeve and an external pipeline are reduced, and compared with the flange connection of the heat exchange inner sleeve, the leakage of the heat exchange sleeve can be effectively reduced; the heat exchange sleeve penetrates through the lower end socket along the axial direction and is inserted into the absorber main body, and the heat exchange sleeves are arranged in parallel, so that the heat exchange efficiency is high. The design of the outer accompanying pipe can further improve the heat transfer efficiency inside the adsorber. Therefore, the absorber can effectively reduce the risk of heat source medium leakage, and can effectively improve the heat transfer and heat exchange efficiency inside the absorber body under the combined action of the second heat medium in the outer accompanying pipe and the first heat medium in the socket-type sleeve assembly, so that the temperature distribution in the absorber is uniform.
In addition, the adsorber according to the above embodiment of the present invention may further have the following additional technical features:
optionally, a plurality of the gas inlets to be adsorbed are on the same horizontal plane and are distributed at equal intervals along the central axis of the adsorber body.
Optionally, three inlets for said gas to be sorbed are included.
Optionally, the outer accompanying tube has a tube pitch of 15.5 to 17.5 mm.
Optionally, a plurality of branch pipes are vertically communicated with the main pipe.
Optionally, a plurality of said long straight tubes are included, and each said long straight tube is in vertical communication with each said branch tube.
Optionally, each long flat pipe is vertically communicated with a plurality of heat exchange sleeves.
Optionally, a plurality of said heat exchange tubes are connected in parallel.
Optionally, the heat exchange sleeves arranged in parallel are arranged in a square, regular triangle or regular hexagon form.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of an adsorber in accordance with an embodiment of the invention;
FIG. 2 is a top view of a female sleeve assembly according to one embodiment of the present invention;
FIG. 3 is a schematic view of a partially connected structure of a female cannula assembly according to an embodiment of the present invention;
fig. 4 is a schematic illustration of a socket structure according to an embodiment of the present invention;
FIG. 5 is a graph showing the temperature change of the cross section of the embodiment at a distance of 1m and 2 to 10m from the gas inlet to be adsorbed;
FIG. 6(a) is a temperature profile of the interior of an adsorber body of a comparative example;
FIG. 6(b) is a temperature distribution diagram of a cross section of the inside of the adsorber body of the comparative example at a distance of 1m from the inlet of the gas to be adsorbed;
FIG. 7 is a graph showing the temperature change of a cross section of a control example at a distance of 2 to 10m from the inlet of a gas to be adsorbed.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In an aspect of the present invention, the present invention provides an adsorber, according to an embodiment of the present invention, referring to fig. 1 to 4, the adsorber includes: adsorber body 100, spigot-and-socket sleeve assembly 200, and skirt 300.
According to an embodiment of the present invention, the adsorber body 100 includes: an upper head 110, an outer accompanying pipe 120, a lower head 130 and an adsorption space 140. Specifically, the upper head 110 is located at the upper part of the adsorber body 100 and connected to the top of the adsorption space 140, and the upper head 110 is provided with an activated carbon inlet 111 and a gas outlet 112. The outer accompanying pipe 120 is provided around the outer wall of the adsorption space 140, and the outer accompanying pipe 120 has a second heat medium inlet 121 and a second heat medium outlet 122, and is adapted to flow in and out of the second heat medium. According to an embodiment of the invention, the tube pitch of the outer accompanying tube may be 15.5-17.5mm, e.g. 15.5mm, 16mm, 16.5mm, 17mm, 17.5 mm. The inventor finds that the distance between the outer accompanying pipes is too high, the heat conduction effect of the outer accompanying pipes to the interior of the adsorber is poor, the temperature rising or reducing speed is slow, and the temperature distribution is uniform; the distance between the outer accompanying pipes is too low, the equipment investment cost is high, and the equipment size has certain limitation on the distribution of the outer accompanying pipes. The lower head 130 is located at the lower part of the adsorber body 100 and connected to the bottom of the adsorption space 140, and the lower head 130 has an activated carbon outlet 131, a plurality of openings 132, and a plurality of inlets 133 for gas to be adsorbed. Further, the plurality of to-be-adsorbed gas inlets 133 are located on the same horizontal plane and are equally spaced along the central axis of the adsorber body 100. Therefore, the gas to be adsorbed can be uniformly distributed in the adsorber body, and the uniformity of the temperature field in the adsorber is improved. It should be noted that the specific number of the gas inlets 133 to be adsorbed is not particularly limited, and for example, three gas inlets 133 to be adsorbed may be included, and the three gas inlets to be adsorbed are distributed at equal angles along the central axis of the adsorber body 100 on the same horizontal plane of the lower head. Specifically, the adsorber is configured to introduce activated carbon into the adsorber body 100 through the activated carbon inlet 111, discharge gas through the gas outlet 112, introduce a second heat medium through the outer accompanying tube 120 to perform heat exchange with the adsorber body 100, discharge activated carbon through the activated carbon outlet 131, and introduce a gas to be adsorbed into the adsorber body 100 through the gas inlet 133 to be adsorbed, thereby regenerating the activated carbon in the adsorber body 100 to obtain regenerated activated carbon. It should be noted that the specific form of the outer accompanying tube 120 is not particularly limited, and those skilled in the art can select the specific form according to actual needs, for example, the specific form may be a heat exchange structure in the form of a jacket, or may be a spiral coil. This contributes to increasing the heat transfer efficiency between the outer pipe and the adsorber main body 100, increasing the temperature in the adsorber, and increasing the regeneration efficiency of the activated carbon.
According to the utility model discloses an embodiment, socket pipe assembly 200 includes: the main pipe 210, the branch pipes 220, the long straight pipe 230 and the heat exchange sleeve 240 are suitable for exchanging heat with the adsorber body 100 to realize temperature rise.
According to the utility model discloses an embodiment, be responsible for 210 including interior person in charge 211 and outer main pipe 212, interior main pipe 211 is interior outer bushing type bilayer structure with outer main pipe 212, interior main pipe 211 has first thermal medium entry 2111, outer main pipe 212 has first thermal medium export 2121, or outer main pipe 212 has first thermal medium entry 2122, interior main pipe 211 has first thermal medium export 2112, and be suitable for through the interior/outer person in charge toward socket joint formula thimble assembly transport first thermal medium, and through the first thermal medium after outer/interior main pipe discharge heat transfer. The inventor finds that the main pipe is beneficial to reducing the occupied space of the socket type sleeve pipe assembly by adopting an inner sleeve pipe and outer sleeve pipe double-layer structure, and then the cost of the adsorber is reduced.
According to the utility model discloses a still another embodiment, branch pipe 220 includes interior branch pipe 221 and outer branch pipe 222, and interior branch pipe 221 is inside and outside bushing type bilayer structure with outer branch pipe 222, and interior branch pipe 221 communicates with interior main pipe 211 perpendicularly, and outer branch pipe 222 communicates with outer main pipe 212 perpendicularly, and is suitable for the intercommunication to be responsible for 210 and long straight pipe 230. The inventor finds that the occupied space of the socket type sleeve pipe assembly can be further reduced by adopting an inner sleeve pipe and outer sleeve pipe double-layer structure, and the cost of the adsorber is further reduced. According to the utility model discloses an embodiment is responsible for many branch pipes 220 of perpendicular intercommunication on 210, from this, many branch pipes form parallel passage, can further reduce the occupation space of socket joint formula thimble assembly, simultaneously, is favorable to improving the heat exchange efficiency of adsorber. Specifically, the plurality of branch pipes are vertically communicated with the main pipe in parallel.
According to the utility model discloses a still another embodiment, long straight tube 230 includes that long straight intraductal sleeve pipe 231 and long straight outside of tubes sleeve pipe 232, and long straight intraductal sleeve pipe 231 is interior outer sleeve pipe bilayer structure with long straight outside of tubes sleeve pipe 232, and long straight intraductal sleeve pipe 231 adopts socket structure to communicate perpendicularly with interior support pipe 221, and long straight 230 both ends of tube are equipped with first pipe cap 233, and long straight outside of tubes sleeve pipe 232 communicates perpendicularly with outer support pipe 222, and is suitable for intercommunication branch pipe and heat transfer sleeve pipe. The inventor finds that the long straight pipe can further reduce the occupied space of the socket-spigot type sleeve pipe assembly by adopting an inner-outer sleeve type double-layer structure, and further reduces the cost of the absorber. The two ends of the long straight pipe are provided with first pipe caps, namely the two ends of the inner sleeve of the long straight pipe and the two ends of the outer sleeve of the long straight pipe are provided with the first pipe caps. The middle part of the long flat branch pipe is connected with the branch pipe. Thereby, the space occupied by the spigot-and-socket pipe assembly can be further reduced. The long straight pipe inner sleeve and the inner support pipe are vertically communicated through the socket structure, the mounting and dismounting are convenient, the weld joint of the socket sleeve assembly is reduced, compared with flange connection, the leakage of the socket sleeve assembly can be effectively reduced, meanwhile, the connection mode can effectively absorb the deformation of the long straight pipe inner sleeve and the inner support pipe caused by thermal expansion, and the stress caused by structural limitation is reduced. According to a specific embodiment of the present invention, a plurality of long straight pipes 230 are included, and each long straight pipe 230 is vertically communicated with each branch pipe 220. For example, the plane of each long flat pipe with the branch pipes in vertical communication therewith is perpendicular to the plane of the main pipe and the branch pipes.
According to the utility model discloses a still another embodiment, sleeve pipe 241 and heat transfer outer tube 242 in the heat transfer 240 includes the heat transfer, sleeve pipe 241 and heat transfer outer tube 242 are inside and outside sleeve pipe bilayer structure in the heat transfer, sleeve pipe 241 adopts socket joint structure perpendicular intercommunication with long straight intraductal sleeve pipe 231 in the heat transfer, the one end of heat transfer outer tube 241 is equipped with second pipe cap 243, the other end and the perpendicular intercommunication of long straight intraductal sleeve pipe 232 of heat transfer outer tube 242, heat transfer sleeve pipe 240 inserts inside adsorber main part 100 along the trompil 132 that the axial passed low head 130, and be suitable for through the medium that flows in the heat transfer sleeve pipe, the realization heats up to the heating in the adsorber main part, thereby realize the regeneration of active. The inventor finds that the heat exchange sleeve can further reduce the occupied space of the socket type sleeve assembly by adopting an inner sleeve and outer sleeve type double-layer structure, and further reduces the cost of the adsorber. The long straight pipe inner sleeve and the heat exchange inner sleeve are vertically communicated through the socket structure, the mounting and dismounting are convenient, the welding seams of the socket sleeve assembly are reduced, compared with flange connection, the leakage of the socket sleeve assembly can be effectively reduced, meanwhile, the connection mode can effectively absorb the deformation caused by the thermal expansion of the long straight pipe inner sleeve and the heat exchange inner sleeve, and the stress caused by the structure limitation is reduced. The second pipe cap is arranged at one end of the heat exchange outer sleeve, so that the first heat medium in the heat exchange outer sleeve can flow into the heat exchange outer sleeve conveniently, or the first heat medium in the heat exchange outer sleeve can flow into the heat exchange inner sleeve. Meanwhile, under the combined action of the heat transfer structure and the heat exchange sleeve, the heat transfer efficiency inside the adsorber main body can be effectively improved, and the temperature inside the adsorber main body is uniformly distributed. It should be noted that the heat exchange outer sleeve and the lower end enclosure can be connected in a welding manner. Further, the inner heat exchange sleeve 241 and the outer heat exchange sleeve 242 may be light pipes or pipes with enhanced heat transfer structures on the outer walls, and the enhanced heat transfer structures may be fins. Therefore, the heat transfer efficiency of the heat exchange sleeve is improved, and the heat exchange efficiency of the heat exchange sleeve and the adsorbent is improved. Further, each long flat tube 230 is vertically connected with a plurality of heat exchange sleeves 240, and the plurality of heat exchange sleeves 240 are connected in parallel. Therefore, the occupied space of the socket-spigot type sleeve assembly can be further reduced, and the cost of the adsorber is further reduced. Meanwhile, the heat exchange efficiency of the socket type sleeve pipe assembly is improved. Further, the heat exchange sleeves 240 arranged in parallel may be arranged in a square, regular triangle or regular hexagon. The inventor finds that the heat exchange sleeves arranged in parallel are arranged in a square shape, a regular triangle shape or a regular hexagon shape, so that the temperature distribution uniformity in the adsorber main body is improved, and the regeneration efficiency of the activated carbon is improved.
Further, the outer branch pipe 222, the long straight pipe outer sleeve 232 and the heat exchange outer sleeve 242 can be communicated through the four-way pipe 21. From this, because of interior sleeve pipe of inner branch pipe and long straight pipe, the perpendicular intercommunication of socket joint structure is all adopted to sleeve pipe in long straight pipe and the heat transfer interior sleeve pipe, and long straight pipe outer sleeve pipe and outer branch pipe, the heat transfer outer tube adopts cross-connection, can make long straight pipe outer sleeve pipe and outer branch pipe, the heat transfer outer tube, including sleeve pipe and heat transfer interior sleeve pipe in long straight pipe, sleeve pipe and interior branch pipe all adopt socket joint structure to communicate, make long straight pipe and heat transfer sleeve pipe easy dismounting, can tear out every heat transfer sleeve pipe alone, tear out every long straight pipe alone, be favorable to single processing when heat transfer sleeve pipe or long straight pipe take place to reveal, single change, show the cost of maintenance who practices thrift the active carbon adsorber. Meanwhile, the structure can further reduce the welding seams of the socket sleeve pipe assembly, and compared with flange connection, the leakage of the socket sleeve pipe assembly can be effectively reduced.
Further, the heat exchange outer sleeve 242 and the long straight outer sleeve 232 can be communicated through a reducer. From this, because of the interior sleeve pipe of long straight pipe and the perpendicular intercommunication of heat transfer interior sleeve pipe adoption socket joint structure, and long straight outside of tubes sleeve pipe and heat transfer outer tube adopt big end down to be connected, can make long straight pipe and heat transfer sleeve pipe easy dismounting, and then further reduce the welding seam of socket joint formula thimble assembly, compare with flange joint, can reduce the leakage of socket joint formula thimble assembly effectively.
Specifically, the first heat medium in the socket type sleeve assembly can flow to each parallel inner/outer branch pipe through the inner/outer main pipe, then flow to each parallel long straight pipe inner/outer sleeve pipe from each parallel inner/outer branch pipe, then flow to each parallel heat exchange inner/outer sleeve pipe from each parallel long straight pipe inner/outer sleeve pipe, then flow to each parallel long straight pipe outer/inner sleeve pipe from the top of each parallel heat exchange outer/inner sleeve pipe under the action of the second pipe cap, then flow to each parallel long straight pipe outer/inner branch pipe from each parallel long straight pipe outer/inner sleeve pipe, finally collect to the outer/inner main pipe, and then flow out of the socket type heat exchange pipe from the outer/inner main pipe, thus completing the flow of the medium in the socket type sleeve assembly. It should be noted that the first heat medium may flow in from the inner main pipe, flow out from the outer main pipe, or flow in from the outer main pipe, and then flow out from the inner main pipe.
According to an embodiment of the present invention, the skirt 300 is connected to the adsorber body 100 to support the adsorber body.
According to the utility model discloses an embodiment, treat that the inlet temperature of adsorbed gas can be 350-400K, for example can be 350K, 360K, 370K, 380K, 390K, 400K, the inventor finds that, when treating that the inlet temperature of adsorbed gas is low excessively, gets into the adsorber and heats 8 hours later, and the temperature after the intensification can not reach the technological requirement. Too high inlet temperature of the gas to be adsorbed would result in too high investment cost for gas treatment in the early stage. Furthermore, the temperature in the adsorber is not less than 400K after temperature rise. The inventor finds that under the combined action of the second heat medium in the outer accompanying pipe, the first heat medium in the socket-type sleeve assembly and the air inlet temperature of the gas to be adsorbed, the temperature in the adsorber is not less than 400K after the temperature rise is finished, the regeneration temperature of the activated carbon is reached, meanwhile, the service cycle of the activated carbon is prolonged, and the regeneration efficiency of the activated carbon is improved. Further, the initial temperature of the activated carbon may be 320 to 340K, for example, 320K, 325K, 330K, 335K, 340K. The inventor finds that the initial temperature of the activated carbon is too high or too low, and the requirements of adsorption and desorption cannot be met. Further, the gas to be adsorbed can be polysilicon reduction tail gas, and the first heat medium and the second heat medium can be water or kerosene respectively and independently.
Further, the inlet temperature of the first thermal medium and the second thermal medium is 450 to 470K, respectively, and may be 450K, 455K, 460K, 465K, 470K, for example. The inventor finds that if the inlet temperatures of the first heat medium and the second heat medium are too low, the temperature after heating cannot reach the process requirement after the first heat medium and the second heat medium enter the adsorber and are heated for 8 hours. If the inlet temperatures of the first heat medium and the second heat medium are too high, the investment cost for processing the first heat medium and the second heat medium in the early stage is too high. Further, the total flow rate of the first heat medium may be 180 to 190m3H, for example, may be 180m3/h、182m3/h、184m3/h、 186m3/h、188m3/h、190m3H is used as the reference value. The inventors have found that if the total flow of the first thermal medium is too low, the temperature after 8 hours of heating in the adsorber does not meet the process requirements. If the total flow of the first heat medium is too high, the requirement on the pipeline size is higher, the adsorber needs to ensure a certain treatment capacity, the distribution and the size of the socket-type sleeve pipe assembly are limited, and the investment cost of equipment in the early stage can be increased. Further, the flow rate of the second heat medium may be 13 to 17m3H may be, for example, 13m3/h、14m3/h、15m3/h、16m3/h、17m3H is used as the reference value. The inventors have found that if the flow of the second thermal medium is too low, the temperature after 8 hours of heating in the adsorber does not meet the process requirements. If the flow rate of the second heat medium is too high, the requirement on the size of the pipeline is larger, the size of the adsorption space has certain limitation on the distribution and the size of the outer accompanying pipe, and the investment cost of equipment in the early stage can be increased.
According to the adsorber provided by the embodiment of the utility model, the adsorber can remarkably reduce the volume of the socket-and-spigot type sleeve pipe assembly in the adsorber by adopting the main pipe, the branch pipe, the long flat pipe and the heat exchange sleeve pipe which are of an inner and outer sleeve pipe type double-layer structure, thereby saving space and effectively reducing the installation height of the skirt; the long straight pipe inner sleeve and the inner branch pipe, and the long straight pipe inner sleeve and the heat exchange inner sleeve are connected by adopting a socket structure, so that the assembly and disassembly are convenient, the welding seams for connecting the heat exchange inner sleeve and an external pipeline are reduced, and compared with the flange connection of the heat exchange inner sleeve, the leakage of the heat exchange sleeve can be effectively reduced; the heat exchange sleeve penetrates through the lower end socket along the axial direction and is inserted into the absorber main body, and the heat exchange sleeves are arranged in parallel, so that the heat exchange efficiency is high. The design of the outer accompanying pipe can further improve the heat transfer efficiency inside the adsorber. Therefore, the absorber can effectively reduce the risk of heat source medium leakage, and can effectively improve the heat transfer and heat exchange efficiency inside the absorber body under the combined action of the second heat medium in the outer accompanying pipe and the first heat medium in the socket-type sleeve assembly, so that the temperature distribution in the absorber is uniform.
For ease of understanding, the method of heating using the above-described adsorber is described in detail below, and according to an embodiment of the invention, the method includes: supplying gas to be adsorbed with the inlet gas temperature of 350-400K to an adsorber, introducing a first heat medium into a socket-type sleeve assembly in the adsorber, introducing a second heat medium into an outer accompanying pipe outside the adsorber, and raising the temperature to reach the activated carbon regeneration temperature in the adsorber. The inventor finds that by combining the adsorber and limiting the inlet temperature of the gas to be adsorbed to 350-400K, the temperature in the adsorber can reach the activated carbon regeneration temperature after the temperature rise process is finished. Therefore, by adopting the method, the risk of heat source medium leakage can be effectively reduced, meanwhile, under the combined action of the second heat medium in the outer accompanying pipe, the first heat medium in the socket-type sleeve pipe assembly and the air inlet temperature of the gas to be adsorbed, the heat transfer and heat exchange efficiency in the adsorber main body can be effectively improved, the temperature in the adsorber is uniformly distributed, and the temperature in the adsorber after the temperature rise is finished is suitable for the regeneration of the activated carbon, so that the service cycle of the activated carbon is prolonged, the regeneration time of the activated carbon is reduced, and the regeneration efficiency is improved. Specifically, the inlet air temperature can be 350K, 360K, 370K, 380K, 390K and 400K, and the inventor finds that when the inlet air temperature of the gas to be adsorbed is too low, the gas enters the adsorber to be heated for 8 hours, and then the temperature after temperature rise cannot meet the process requirement. Too high inlet temperature of the gas to be adsorbed would result in too high investment cost for gas treatment in the early stage.
According to an embodiment of the present invention, the temperature in the adsorber after the temperature rise is not less than 400K. The inventor finds that under the combined action of the second heat medium in the outer accompanying pipe, the first heat medium in the socket-type sleeve assembly and the air inlet temperature of the gas to be adsorbed, the temperature in the adsorber is not less than 400K after the temperature rise is finished, the regeneration temperature of the activated carbon is reached, meanwhile, the service cycle of the activated carbon is prolonged, and the regeneration efficiency of the activated carbon is improved. Further, the initial temperature of the activated carbon may be 320 to 340K, for example, 320K, 325K, 330K, 335K, 340K. The inventor finds that the initial temperature of the activated carbon is too high or too low, and the requirements of adsorption and desorption cannot be met. Further, the gas to be adsorbed may be polysilicon reduction tail gas. The first thermal medium and the second thermal medium may be water or kerosene, respectively, independently.
According to a further embodiment of the present invention, the inlet temperature of the first thermal medium and the second thermal medium is 450-470K, respectively, independently, and may be 450K, 455K, 460K, 465K, 470K, for example. The inventor finds that if the inlet temperatures of the first heat medium and the second heat medium are too low, the temperature after heating cannot reach the process requirement after the first heat medium and the second heat medium enter the adsorber and are heated for 8 hours. If the inlet temperatures of the first heat medium and the second heat medium are too high, the investment cost for processing the first heat medium and the second heat medium in the early stage is too high. Further, the total flow rate of the first heat medium may be 180 to 190m3H, for example, may be 180m3/h、182m3/h、184m3/h、186m3/h、188m3/h、190m3H is used as the reference value. Human hairNow, if the total flow of the first thermal medium is too low, the temperature after 8 hours of heating in the adsorber cannot meet the process requirements. If the total flow of the first heat medium is too high, the requirement on the pipeline size is higher, the adsorber needs to ensure a certain treatment capacity, the distribution and the size of the socket-type sleeve pipe assembly are limited, and the investment cost of equipment in the early stage can be increased. Further, the flow rate of the second heat medium may be 13 to 17m3H may be, for example, 13m3/h、14m3/h、15m3/h、16m3/h、17m3H is used as the reference value. The inventors have found that if the flow of the second thermal medium is too low, the temperature after 8 hours of heating in the adsorber does not meet the process requirements. If the flow rate of the second heat medium is too high, the requirement on the size of the pipeline is larger, the size of the adsorption space has certain limitation on the distribution and the size of the outer accompanying pipe, and the investment cost of equipment in the early stage can be increased.
According to the temperature rising method provided by the embodiment of the utility model, the absorber adopted in the method is provided with the main pipe, the branch pipe, the long flat straight pipe and the heat exchange sleeve pipe which are of an inner and outer sleeve pipe type double-layer structure, so that the volume of the inner socket type sleeve pipe assembly of the absorber can be obviously reduced, the space is saved, and the installation height of the skirt base is effectively reduced; the long straight pipe inner sleeve and the inner branch pipe, and the long straight pipe inner sleeve and the heat exchange inner sleeve are connected by adopting a socket structure, so that the assembly and disassembly are convenient, the welding seams for connecting the heat exchange inner sleeve and an external pipeline are reduced, and compared with the flange connection of the heat exchange inner sleeve, the leakage of the heat exchange sleeve can be effectively reduced; the heat exchange sleeve penetrates through the lower end socket along the axial direction and is inserted into the absorber main body, and the heat exchange sleeves are arranged in parallel, so that the heat exchange efficiency is high. The design of the outer accompanying pipe can further improve the heat transfer efficiency inside the adsorber. Further, the inventor has found through extensive research that the temperature in the adsorber can reach the activated carbon regeneration temperature after the temperature rise process is finished by combining the adsorber and limiting the inlet temperature of the gas to be adsorbed to 350-400K. Therefore, by adopting the method, the risk of heat source medium leakage can be effectively reduced, meanwhile, under the combined action of the second heat medium in the outer accompanying pipe, the first heat medium in the socket-type sleeve pipe assembly and the air inlet temperature of the gas to be adsorbed, the heat transfer and heat exchange efficiency in the adsorber main body can be effectively improved, the temperature in the adsorber is uniformly distributed, and the temperature in the adsorber after the temperature rise is finished is suitable for the regeneration of the activated carbon, so that the service cycle of the activated carbon is prolonged, the regeneration time of the activated carbon is reduced, and the regeneration efficiency is improved.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Examples
Referring to fig. 1-4, the adsorber comprises an adsorber body 100 having an inner diameter of 3m, a female sleeve assembly 200, and a skirt 300. The adsorber body 100 includes an upper head 110, a spiral coil outer header 120, a lower head 130, and an adsorption space 140. Specifically, the upper head 110 is located at the upper portion of the adsorber body 100 and connected to the top of the adsorption space 140, and the upper head 110 is provided with an activated carbon inlet 111 and a gas outlet 112. The outer accompanying pipe 120 is provided around the outer wall of the adsorption space 140, the outer accompanying pipe 120 has a second heat medium inlet 121 and a second heat medium outlet 122, and the pipe pitch of the outer accompanying pipe is 16.7 mm. The lower head 130 is located at the lower part of the adsorber body 100 and connected to the bottom of the adsorption space 140, the lower head 130 has an activated carbon outlet 131, a plurality of openings 132, and 3 to-be-adsorbed gas inlets 133, and the 3 to-be-adsorbed gas inlets 133 are distributed on the same horizontal plane of the lower head 130 at equal angles along the central axis of the adsorber body 100.
Spigot-and-socket sleeve assembly 200 includes: a main tube 210, a branch tube 220, a long flat tube 230, and a heat exchange sleeve 240. The main pipe 210 includes an inner main pipe 211 and an outer main pipe 212, the inner main pipe 211 and the outer main pipe 212 have an inner-outer sleeve type double-layer structure, the inner main pipe 211 has a first heat medium inlet 2111, and the outer main pipe 212 has a first heat medium outlet 2121. The branch pipe 220 includes an inner branch pipe 221 and an outer branch pipe 222, the inner branch pipe 221 and the outer branch pipe 222 are of an inner-outer sleeve type double-layer structure, the inner branch pipe 221 is vertically communicated with the inner main pipe 211, and the outer branch pipe 222 is vertically communicated with the outer main pipe 212 and is suitable for communicating the main pipe 210 and the long straight pipe 230. The main pipe 210 is vertically connected with a plurality of branch pipes 220. The long straight pipe 230 comprises a long straight pipe inner sleeve 231 and a long straight pipe outer sleeve 232, the long straight pipe inner sleeve 231 and the long straight pipe outer sleeve 232 are of an inner and outer sleeve type double-layer structure, the long straight pipe inner sleeve 231 is vertically communicated with the inner supporting pipe 221 through a socket structure, first pipe caps 233 are arranged at two ends of the long straight pipe 230, and the long straight pipe outer sleeve 232 is vertically communicated with the outer supporting pipe 222 and is suitable for communicating the branch pipe 220 with the heat exchange sleeve 240. Comprising a plurality of long flat tubes 230, and each long flat tube 230 is vertically communicated with each branch tube 220. The heat exchange sleeve 240 comprises an inner heat exchange sleeve 241 and an outer heat exchange sleeve 242, the inner heat exchange sleeve 241 and the outer heat exchange sleeve 242 are of an inner sleeve and outer sleeve double-layer structure, the inner heat exchange sleeve 241 is vertically communicated with the inner long straight tube 231 through a socket structure, a second tube cap 243 is arranged at one end of the outer heat exchange sleeve 241, the other end of the outer heat exchange sleeve 242 is vertically communicated with the outer long straight tube 232, and the heat exchange sleeve 240 axially penetrates through the opening 132 of the lower end socket 130 to be inserted into the adsorber main body 100. Both heat exchanging inner sleeve 241 and heat exchanging outer sleeve 242 are light pipes. Each long flat tube 230 is vertically communicated with a plurality of heat exchange sleeves 240, and the plurality of heat exchange sleeves 240 are connected in parallel. The arrangement form of the 93 heat exchange sleeves 240 arranged in parallel is a square arrangement. The outer branch pipe 222, the long straight pipe outer sleeve 232 and the heat exchange outer sleeve 242 are communicated through a four-way pipe 21. The heat exchange outer sleeve 242 is communicated with the long straight outer sleeve 232 through a reducer. The skirt 300 is connected to the adsorber body 100.
Polysilicon reduction tail gas with the inlet temperature of 373.15K is supplied to the adsorber, first heat medium water with the inlet temperature of 458K is introduced into a spigot-and-socket sleeve assembly in the adsorber, second heat medium water with the inlet temperature of 458K is introduced into an outer accompanying pipe outside the adsorber, the initial temperature of activated carbon in the adsorber is 333.15K, and the temperature distribution in the adsorber in the heating process is shown in figure 5. Wherein the total flow rate of the first heat medium is 185m3H, the flow rate of the second heat medium is 15m3/h。
As can be seen from FIG. 5, after heating for 8h, the average temperature of the section of the area 1m away from the gas inlet to be adsorbed in the adsorber reaches 411.79K, the average temperature of the section of the area 2-10m away from the gas inlet to be adsorbed reaches 405.26K, and the temperature in the adsorber is uniformly distributed and reaches the activated carbon regeneration temperature.
Comparative example
The adsorbers are in accordance with the examples.
Supplying polysilicon reduction tail gas with the inlet gas temperature of 310K to an adsorber, introducing first heat medium water with the inlet temperature of 458K into a socket-type sleeve assembly in the adsorber, introducing second heat medium water with the inlet temperature of 458K into an outer accompanying pipe outside the adsorber, wherein the initial temperature of activated carbon in the adsorber is 310K, the temperature distribution condition inside the adsorber body and the temperature distribution condition of a cross section of the adsorber body at a position 1m away from a gas inlet to be adsorbed are shown in figure 6, and the temperature distribution condition inside the adsorber in the heating process is shown in figure 7. Wherein the total flow rate of the first heat medium is 200m3H, the flow rate of the second heat medium was 12.5m3/h。
As can be seen from FIGS. 6 and 7, the temperature distribution in the adsorber is uniform, but the average temperature of the cross section of the area 2-10m away from the gas inlet to be adsorbed in the adsorber after heating for 8 hours is only 385.5K, and does not reach the activated carbon regeneration temperature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (9)
1. An adsorber, comprising:
an adsorber body, the adsorber body comprising:
an adsorption space;
the upper end enclosure is positioned at the upper part of the adsorber main body and is connected with the top of the adsorption space, and an activated carbon inlet and a gas outlet are formed in the upper end enclosure;
an outer accompanying pipe disposed around an outer wall of the adsorption space, the outer accompanying pipe having a second heat medium inlet and a second heat medium outlet;
the lower end enclosure is positioned at the lower part of the adsorber main body and is connected with the bottom of the adsorption space, and the lower end enclosure is provided with an activated carbon outlet, a plurality of openings and a plurality of to-be-adsorbed gas inlets;
socket joint formula thimble assembly, socket joint formula thimble assembly includes:
the main pipe comprises an inner main pipe and an outer main pipe, the inner main pipe and the outer main pipe are of an inner-outer sleeve type double-layer structure, the inner main pipe is provided with a first heat medium inlet, the outer main pipe is provided with a first heat medium outlet, or the outer main pipe is provided with a first heat medium inlet, and the inner main pipe is provided with a first heat medium outlet;
the branch pipe comprises an inner branch pipe and an outer branch pipe, the inner branch pipe and the outer branch pipe are of an inner-outer sleeve type double-layer structure, the inner branch pipe is vertically communicated with the inner main pipe, and the outer branch pipe is vertically communicated with the outer main pipe;
the long straight pipe comprises a long straight pipe inner sleeve and a long straight pipe outer sleeve, the long straight pipe inner sleeve and the long straight pipe outer sleeve are of an inner sleeve and outer sleeve double-layer structure, the long straight pipe inner sleeve and the inner support pipe are vertically communicated by adopting a socket structure, first pipe caps are arranged at two ends of the long straight pipe, and the long straight pipe outer sleeve and the outer support pipe are vertically communicated;
the heat exchange sleeve comprises a heat exchange inner sleeve and a heat exchange outer sleeve, the heat exchange inner sleeve and the heat exchange outer sleeve are of an inner sleeve and outer sleeve double-layer structure, the heat exchange inner sleeve and the long straight tube inner sleeve are vertically communicated by adopting a socket structure, one end of the heat exchange outer sleeve is provided with a second tube cap, the other end of the heat exchange outer sleeve is vertically communicated with the long straight tube outer sleeve, and the heat exchange sleeve axially penetrates through the opening of the lower end socket and is inserted into the absorber body;
the skirt is connected with the adsorber main body.
2. The adsorber of claim 1, wherein the plurality of gas inlets to be adsorbed are on the same horizontal plane and are equally spaced along the central axis of the adsorber body.
3. The adsorber of claim 1 or 2, comprising three inlets for the gas to be adsorbed.
4. The adsorber of claim 1 wherein the outer satellite tubes have a tube pitch of 15.5mm to 17.5 mm.
5. The adsorber of claim 1 wherein the main conduit is vertically connected to a plurality of the branch conduits.
6. The adsorber of claim 5 comprising a plurality of the elongated flat tubes, each of the elongated flat tubes being in vertical communication with each of the branch tubes.
7. The adsorber of claim 6 wherein a plurality of the heat exchange sleeves are in vertical communication with each of the elongated flat tubes.
8. The adsorber of claim 7 wherein a plurality of the heat exchange sleeves are connected in parallel.
9. The adsorber of claim 8 wherein the heat exchange sleeves arranged in parallel are arranged in a square, regular triangle, or regular hexagon.
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