CN210385802U

CN210385802U - Multilayer fluidized bed device for preparing composite supported catalyst in grading manner

Info

Publication number: CN210385802U
Application number: CN201920576168.5U
Authority: CN
Inventors: 姚常斌; 左嫣然; 董鹏伟; 王玉山; 张开元
Original assignee: Beijing SPC Environment Protection Tech Co Ltd
Current assignee: Beijing SPC Environment Protection Tech Co Ltd
Priority date: 2019-04-25
Filing date: 2019-04-25
Publication date: 2020-04-24
Anticipated expiration: 2029-04-25

Abstract

The utility model provides a multi-layer fluidized bed device for preparing composite supported catalyst in a grading way, which comprises a reaction bin, and a load layer, a drying layer and a roasting layer which are sequentially arranged in the reaction bin in a separating way from top to bottom, wherein the top of the reaction bin is provided with a feed inlet, the top of the load layer is provided with a load gas outlet, and the bottom of the roasting layer is provided with a discharge opening; the multilayer fluidized bed device is convenient for preparing the composite carrier catalyst on the process site, and can carry out catalyst preparation and site modification according to the needs, thereby ensuring that the catalyst meets the actual requirements and specific requirements. Meanwhile, the active metal component solution of the device is not used for impregnating the carrier but atomized and sprayed, so that the using amount of the solution is small, the solution waste can be reduced, and the water resource is saved; the equipment can be used for preparing and modifying the catalyst on site, is convenient to use and reduces the transportation cost; the waste of the catalyst which can not meet the requirement is avoided, the waste can be utilized, the operation elasticity is large, and the operation is simple and convenient.

Description

Multilayer fluidized bed device for preparing composite supported catalyst in grading manner

Technical Field

The utility model relates to a catalyst preparation technical field, concretely relates to multilayer fluidized bed device of compound load type catalyst of hierarchical preparation.

Background

The catalyst is a substance (solid catalyst is also called catalyst) which can change the chemical reaction rate of reactants in a chemical reaction without changing chemical balance, and the mass and chemical properties of the catalyst are not changed before and after the chemical reaction, and the catalyst is required to be used in more than 90 percent of industrial processes in the modern industrial fields of chemical industry, petrifaction, biochemistry, environmental protection and the like.

The traditional catalyst preparation methods include a mechanical mixing method, a precipitation method, an impregnation method, a spray evaporation method, a hot melting method, an impregnation method, an ion exchange method and the like. The impregnation method is a common preparation method for preparing a supported catalyst, and comprises the steps of immersing a carrier (diatomite, alumina and activated carbon) with high porosity into a solution containing one or more metal ions, keeping a certain temperature, immersing the solution into carrier pores, draining, drying and roasting the carrier, and attaching a layer of required solid metal oxide or salts thereof to the inner surface of the carrier. At present, in general, catalysts used in the process of purifying flue gas by using the catalysts in the field of flue gas purification are all from catalysts manufactured by manufacturers and transported to a using process site, such as activated carbon used for dry desulfurization and V2O5-WO3(MoO3)/TiO2 catalysts used for SCR denitration. In practical application and research and development tests, a single simple catalyst cannot meet actual requirements and specific requirements, and the catalyst needs to be modified on site and further loaded with other active components to meet the actual requirements and the specific requirements.

Therefore, it is an urgent problem to be solved by those skilled in the art to provide a multi-layer fluidized bed apparatus for conveniently preparing a composite supported catalyst in a process field, so as to prepare and modify the catalyst in the field according to the needs, so as to ensure that the catalyst meets the actual needs and specific requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a make things convenient for multilayer fluidized bed device of compound carrier catalyst of technology on-the-spot preparation to carry out catalyst preparation and on-the-spot modification as required in the hope, satisfy actual demand and specific requirement with the assurance catalyst.

In order to solve the technical problem, the utility model provides a multi-layer fluidized bed device for preparing composite supported catalyst in a grading way, which comprises a reaction bin, and a load layer, a drying layer and a roasting layer which are sequentially arranged in the reaction bin in a separating way from top to bottom, wherein the top of the reaction bin is provided with a feed inlet, the top of the load layer is provided with a load gas outlet, and the bottom of the roasting layer is provided with a discharge outlet;

a spray header group is arranged above the load layer, is communicated with the liquid slurry tank through a liquid slurry pipe and sprays the metal solution in the liquid slurry tank onto the load substance in the load layer in a working state;

the load layer is communicated with the drying layer through a first material returning valve, the drying layer is communicated with the roasting layer through a second material returning valve, and a first heat insulation sealing plate is arranged between the drying layer and the roasting layer;

the side wall of the drying layer is provided with a drying air inlet and communicated with the drying blower through the drying air inlet, the upper part of the roasting layer is provided with a roasting air outlet, and the side wall of the roasting layer is provided with a roasting air inlet and communicated with the roasting blower through the roasting air inlet.

Furthermore, a loading fluidization porous plate is arranged between the loading layer and the drying layer, a drying fluidization porous plate is arranged between the drying layer and the roasting layer, and roasting fluidization porous plates are arranged at the bottoms of the roasting layers; the drying air inlet is arranged between the drying fluidization porous plate and the first heat insulation sealing plate, and the discharge opening is formed in the roasting fluidization porous plate arranged at the bottom of the roasting layer.

Furthermore, the periphery of the load layer, the periphery of the drying layer and the periphery of the roasting layer are provided with heating temperature control devices.

Further, a diaphragm pump is arranged on the slurry pipe, and the diaphragm pump adjusts the spraying amount of the spraying head group according to a preset strategy.

Furthermore, the spray header group comprises a first spray header group and a second spray header group which is arranged in parallel with the first spray header group, and the two spray header groups are communicated with the liquid slurry pool through the liquid slurry pipe.

Furthermore, the slurry tank comprises a first slurry tank and a second slurry tank, the slurry pipe comprises a first slurry pipe and a second slurry pipe, the first slurry tank is communicated with the first spray header group through the first slurry pipe, and the second slurry tank is communicated with the second spray header group through the second slurry pipe.

Furthermore, the load layer comprises an upper layer and a lower layer separated from the upper layer, the first spray header group is arranged at the top of the upper layer, the second spray header group is arranged at the upper part of the lower layer, and a third material reversing valve is arranged between the upper layer and the lower layer.

Further, an analytic layer communicated with the load layer through a fourth material returning valve is further arranged above the load layer, an analytic air inlet is formed in the top of the analytic layer, an analytic air outlet communicated with an analytic air blower is formed in the side wall of the analytic layer, and the feed inlet is formed in the upper portion of the analytic layer.

Furthermore, the outer side of the desorption layer is provided with a desorption layer heating temperature control device.

Furthermore, the bottom of the analytic layer is provided with an analytic fluidization porous plate, and a second heat insulation sealing plate is arranged between the analytic layer and the loading layer.

The multi-layer fluidized bed device for preparing the composite supported catalyst in a grading way comprises a reaction bin, and a load layer, a drying layer and a roasting layer which are sequentially arranged in the reaction bin in a separating way from top to bottom, wherein the top of the reaction bin is provided with a feed inlet, the top of the load layer is provided with a load gas outlet, and the bottom of the roasting layer is provided with a discharge opening; the spraying head group is communicated with the liquid slurry pool through a liquid slurry pipe and sprays the metal solution in the liquid slurry pool to the load substance in the load layer in a working state; the load layer is communicated with the drying layer through a first material returning valve, the drying layer is communicated with the roasting layer through a second material returning valve, and a first heat insulation sealing plate is arranged between the drying layer and the roasting layer; the side wall of the drying layer is provided with a drying air inlet and communicated with the drying blower through the drying air inlet, the upper part of the roasting layer is provided with a roasting air outlet, and the side wall of the roasting layer is provided with a roasting air inlet and communicated with the roasting blower through the roasting air inlet.

In the field working process, a medium for bearing metal ions is conveyed into the reaction bin through the feed inlet, a metal solution or a single catalyst to be modified is stored in the slurry tank and sprayed to the medium layer from the spray header group through the slurry pipe, so that the fusion of the metal ions and the medium is gradually completed in the spraying process; the mixture fully fused by the dielectric layer enters a drying layer, is gradually dehydrated and dried in the drying layer under the action of a drying blower, then enters a roasting layer, and is further dehydrated and roasted in the roasting layer under the action of a roasting blower to form a finished catalyst meeting the requirement.

Therefore, the multilayer fluidized bed device is convenient for preparing the composite carrier catalyst on the process site, and can carry out catalyst preparation and site modification according to the requirements, thereby ensuring that the catalyst meets the actual requirements and specific requirements. Meanwhile, the active metal component solution of the device is not used for impregnating the carrier but atomized and sprayed, so that the using amount of the solution is small, the solution waste can be reduced, and the water resource is saved; the equipment can be used for preparing and modifying the catalyst on site, is convenient to use and reduces the transportation cost; the waste of the catalyst which can not meet the requirement is avoided, the waste can be utilized, the operation elasticity is large, and the operation is simple and convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a multi-layer fluidized bed apparatus for staged preparation of a composite supported catalyst according to the present invention;

FIG. 2 is a multi-layer fluidized bed device for preparing a composite supported catalyst by double-layer spraying and grading with the same slurry;

FIG. 3 is a multi-layer fluidized bed device for preparing a composite supported catalyst by heterogeneous slurry double-layer spraying and grading;

FIG. 4 is a multi-layer fluidized bed apparatus for preparing a composite supported catalyst by double-supported layer grading;

FIG. 5 is a multi-layer fluidized bed apparatus for simultaneous dry desulfurization desorption and composite supported catalyst preparation.

Description of reference numerals:

1-supporting layer

11-feed inlet 12-load gas outlet 13-load fluidization perforated plate

101-upper layer 102-lower layer

2-drying layer

21-dry air inlet 22-dry blower 23-dry fluidization perforated plate

3-baking of the layer

31-discharge opening 32-roasting gas outlet 33-roasting gas inlet 34-roasting blower

35-roasting fluidization perforated plate

41-spray header group 42-slurry pipe 43-slurry pool 44-diaphragm pump

51-first return valve 52-second return valve 53-third return valve 54-fourth return valve

61-first heat-insulating sealing plate 62-second heat-insulating sealing plate

7-heating temperature control device

8-resolution layer

81-desorption inlet 82-desorption outlet 83-desorption blower

84-analytic layer heating temperature control device 85-analytic fluidization porous plate

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a multi-layer fluidized bed apparatus for staged preparation of a composite supported catalyst according to an embodiment of the present invention.

In a specific embodiment, the multi-layer fluidized bed device for preparing the composite supported catalyst in stages provided by the utility model comprises a reaction bin, and a load layer 1, a drying layer 2 and a roasting layer which are sequentially arranged in the reaction bin in a separating manner from top to bottom, wherein the top of the reaction bin is provided with a feed inlet 11, the top of the load layer 1 is provided with a load gas outlet 12, and the bottom of the roasting layer is provided with a discharge outlet; a spray header group 41 is arranged above the load layer 1, the spray header group 41 is communicated with a slurry tank 43 through a slurry pipe 42, and in a working state, the metal solution in the slurry tank 43 is sprayed onto the load substance in the load layer 1; the load layer 1 is communicated with the drying layer 2 through a first return valve 51, the drying layer 2 is communicated with the roasting layer through a second return valve 52, and a first heat-insulating sealing plate 61 is arranged between the drying layer 2 and the roasting layer; the side wall of the drying layer 2 is provided with a drying air inlet 21 and communicated with the drying air blower 22 through the drying air inlet 21, the upper part of the roasting layer is provided with a roasting air outlet, and the side wall of the roasting layer is provided with a roasting air inlet and communicated with the roasting air blower through the roasting air inlet.

Further, a loading fluidization porous plate 13 is arranged between the loading layer 1 and the drying layer 2, and the loading fluidization porous plate 13 can enable substances in the loading layer 1 to flow, so that the contact probability and the contact area of the sprayed metal solution and the medium can be improved, and the reaction effect of the two is ensured. For similar purposes, a drying fluidization porous plate 23 can be arranged between the drying layer 2 and the roasting layer to enable the substances in the drying layer 2 to flow and turn over, roasting fluidization porous plates are arranged at the bottom of the roasting layer to enable the substances in the roasting layer to flow and turn over, and the discharge opening is opened on the roasting fluidization porous plate arranged at the bottom of the roasting layer; the drying air inlet 21 is disposed between the drying fluidization porous plate 23 and the first heat insulation sealing plate 61; the reaction rate and the fusion effect are improved by arranging fluidization porous plates in each layer.

Since the preparation reaction of the catalyst needs to be completed within a proper temperature range, in order to ensure the reaction temperature and increase the reaction rate, heating temperature control devices 7 may be disposed on the peripheries of the supporting layer 1, the drying layer 2 and the baking layer.

The liquid slurry pipe 42 is provided with a diaphragm pump 44, and the diaphragm pump 44 adjusts the spraying amount of the spray header group 41 according to a preset strategy so as to control the on-off and flow rate of the spray header group 41 according to an instruction and better adapt to the reaction process.

In the field working process, a medium for bearing metal ions is conveyed into the reaction bin through the feed inlet 11, a metal solution or a single catalyst to be modified is stored in the slurry tank 43 and sprayed from the spray head group 41 to the medium layer through the slurry pipe 42, so that the fusion of the metal ions and the medium is gradually completed in the spraying process; the mixture fully fused by the dielectric layer enters the drying layer 2, is gradually dehydrated and dried in the drying layer 2 under the action of the drying blower 22, then enters the roasting layer, and is further dehydrated and roasted in the roasting layer under the action of the roasting blower to form the finished catalyst meeting the requirement.

On the basis of the above-mentioned specific embodiment, the fluidized bed apparatus provided by the present invention can be further improved. For example, two or more sets of showerheads 41 can be provided to accommodate rapid spraying of large volumes of a single solution or simultaneous spraying of multiple solutions.

As shown in fig. 2, the spray header group 41 includes a first spray header group and a second spray header group arranged in parallel with the first spray header group, both the spray header groups are communicated with the slurry tank 43 through the slurry pipe 42, that is, both the spray headers are communicated with the same slurry tank 43 and sprayed into the same medium layer, so that a large amount of rapid spraying of the same metal solution is realized, and the reaction rate is improved.

Besides the structure for spraying the same metal solution, a structure capable of realizing simultaneous spraying of two metal solutions can be designed. As shown in fig. 3, the slurry tank 43 includes a first slurry tank and a second slurry tank, the slurry pipe 42 includes a first slurry pipe and a second slurry pipe, the first slurry tank is communicated with the first spray head group through the first slurry pipe, the second slurry tank is communicated with the second spray head group through the second slurry pipe, in the preparation process, different types of metal solutions are stored in the first slurry tank and the second slurry tank, the first spray head extracts the metal solution in the first slurry tank and sprays the metal solution to the medium layer, and the second spray head extracts the metal solution in the second slurry tank and sprays the metal solution to the medium layer, so that the preparation of the composite catalyst is realized through the fusion of various metal solutions and media.

When two kinds of metal solutions are sprayed synchronously, the two kinds of metal solutions are not limited to be sprayed in the same load layer 1, as shown in fig. 4, the load layer 1 may also be two layers, that is, the load layer 1 includes an upper layer 101 and a lower layer 102 separated from the upper layer 101, the first spray header group is disposed at the top of the upper layer 101, the second spray header group is disposed at the upper part of the lower layer 102, and a third material reversing valve 53 is disposed between the upper layer 101 and the lower layer 102.

On the basis of the above specific embodiment, as shown in fig. 5, an analytic layer 8 communicated with the load layer 1 through a fourth return valve 54 is further disposed above the load layer 1, an analytic air inlet 81 is disposed at the top of the analytic layer 8, an analytic air outlet 82 communicated with an analytic air blower 83 is disposed at the side wall of the analytic layer 8, the feed inlet 11 is disposed above the analytic layer 8, an analytic layer heating temperature control device 84 is disposed at the outer side of the analytic layer 8, an analytic fluidization porous plate 85 is disposed at the bottom of the analytic layer 8, and a second heat insulation sealing plate 62 is disposed between the analytic layer 8 and the load layer 1. Therefore, the analytic layer 8 is arranged above the load layer 1, so that the metal solution can be pretreated before entering the dielectric layer, and the reaction effect and the reaction rate are improved.

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

1. The multilayer fluidized bed device for preparing the composite supported catalyst in a grading manner is characterized by comprising a reaction bin, and a load layer (1), a drying layer (2) and a roasting layer which are sequentially arranged in the reaction bin in a separating manner from top to bottom, wherein the top of the reaction bin is provided with a feed inlet (11), the top of the load layer (1) is provided with a load gas outlet (12), and the bottom of the roasting layer is provided with a discharge outlet;

a spray header group (41) is arranged above the load layer (1), the spray header group (41) is communicated with a slurry tank (43) through a slurry pipe (42), and in a working state, the metal solution in the slurry tank (43) is sprayed onto the load substance in the load layer (1);

the load layer (1) is communicated with the drying layer (2) through a first material return valve (51), the drying layer (2) is communicated with the roasting layer through a second material return valve (52), and a first heat insulation sealing plate (61) is arranged between the drying layer (2) and the roasting layer;

the side wall of the drying layer (2) is provided with a drying air inlet (21) and communicated with a drying air blower (22) through the drying air inlet (21), the upper part of the roasting layer is provided with a roasting air outlet, and the side wall of the roasting layer is provided with a roasting air inlet and communicated with the roasting air blower through the roasting air inlet.

2. The multilayer fluidized bed apparatus according to claim 1, characterized in that a loading fluidization perforated plate (13) is arranged between the loading layer (1) and the drying layer (2), a drying fluidization perforated plate (23) is arranged between the drying layer (2) and the roasting layer, and roasting fluidization perforated plates are arranged at the bottom of the roasting layer; the drying air inlet (21) is arranged between the drying fluidization porous plate (23) and the first heat insulation sealing plate (61), and the discharge opening is formed in the roasting fluidization porous plate arranged at the bottom of the roasting layer.

3. The multilayer fluidized bed apparatus according to claim 2, characterized in that the outer periphery of the supporting layer (1), the outer periphery of the drying layer (2) and the outer periphery of the baking layer are provided with heating temperature control means (7).

4. The multilayer fluidized bed apparatus according to claim 3, characterized in that a diaphragm pump (44) is arranged on the slurry pipe (42), and the diaphragm pump (44) adjusts the spraying amount of the spray header group (41) according to a preset strategy.

5. The multi-layered fluidized bed apparatus according to any one of claims 1 to 4, wherein the shower head group (41) comprises a first shower head group and a second shower head group juxtaposed to the first shower head group, both the shower head groups being in communication with the slurry tank (43) through the slurry pipe (42).

6. The multi-layered fluidized bed apparatus according to claim 5, wherein the slurry tank (43) comprises a first slurry tank and a second slurry tank, and the slurry pipe (42) comprises a first slurry pipe and a second slurry pipe, the first slurry tank is communicated with the first spray header group through the first slurry pipe, and the second slurry tank is communicated with the second spray header group through the second slurry pipe.

7. The multilayer fluidized bed apparatus according to claim 6, characterized in that the loading layer (1) comprises an upper layer (101) and a lower layer (102) arranged separately from the upper layer (101), the first group of showers is arranged on top of the upper layer (101), the second group of showers is arranged on top of the lower layer (102), and a third material reversing valve (53) is arranged between the upper layer (101) and the lower layer (102).

8. The multilayer fluidized bed apparatus according to any one of claims 1 to 4, wherein a desorption layer (8) communicated with the load layer (1) through a fourth material return valve (54) is further disposed above the load layer (1), a desorption gas inlet (81) is disposed at the top of the desorption layer (8), a desorption gas outlet (82) communicated with a desorption blower (83) is disposed at the side wall of the desorption layer, and the feed inlet (11) is disposed above the desorption layer (8).

9. The multilayer fluidized bed apparatus according to claim 8, characterized in that a desorption layer heating temperature control device (84) is arranged outside the desorption layer (8).

10. The multilayer fluidized bed apparatus according to claim 9, characterized in that a resolving fluidization perforated plate (85) is provided at the bottom of the resolving layer (8) and a second heat insulating sealing plate (62) is provided between the resolving layer (8) and the support layer (1).