CN212566775U - Hot-blast supply system of FCC catalyst spray drying - Google Patents
Hot-blast supply system of FCC catalyst spray drying Download PDFInfo
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- CN212566775U CN212566775U CN202020934356.3U CN202020934356U CN212566775U CN 212566775 U CN212566775 U CN 212566775U CN 202020934356 U CN202020934356 U CN 202020934356U CN 212566775 U CN212566775 U CN 212566775U
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Abstract
The utility model discloses a hot air supply system for FCC catalyst spray drying, which comprises a hot blast stove and a combustion-supporting fan, wherein natural gas and air from the combustion-supporting fan are mixed and combusted at a burner of the hot blast stove to form high-temperature hot flue gas, and micro negative pressure is generated in the hot blast stove at the moment; the system feeds air required by self-priming into the hot blast stove from a temperature mixing port, and the circulating air enters the hot blast stove from the other temperature mixing port of the hot blast stove; the hot blast stove is a double-layer sleeve type, an annular gap is arranged between the inner cylinder and the outer cylinder, circulating gas firstly enters the annular gap between the inner cylinder and the outer cylinder of the hot blast stove for preheating, and then enters the conical end of the outer cylinder of the hot blast stove to be mixed with the inner cylinder and hot combustion smoke; high-temperature hot flue gas, mixed-temperature air, self-absorption air and roasting tail gas from a roasting system which are generated by combustion are mixed, and finally, the mixed gas is output from an air outlet of the hot blast stove. The hot air supply system can reduce the heat dissipation loss of the surface of the hearth, can also automatically distribute air according to the pressure requirement of the hearth, does not have redundant mixed temperature air, and achieves the purpose of energy conservation.
Description
Technical Field
The utility model relates to a FCC catalyst spray drying economizer technical field especially relates to a hot-blast supply system of FCC catalyst spray drying.
Background
Spray drying is a key preparation process in the production process of catalytic cracking (FCC) catalysts, is a process of spray drying and forming slurry containing about 15% of FCC catalysts, and is a main process of energy consumption for preparing the products.
The hot blast stove is key equipment for providing heat for the spray drying process. The heat efficiency of the hot blast stove directly influences the economic benefit and social benefit of the catalyst product. The existing hot blast stove has the defects of low heat efficiency, long start-stop operation time, laggard control scheme and the like because the structure is a single-cylinder type and inner-village heat-insulating brick structure.
In order to improve the utilization efficiency of heat in the spray drying process of a catalytic cracking (FCC) catalyst, a new hot blast stove needs to be designed aiming at the problems of the existing equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a hot-blast supply system of FCC catalyst spray drying to solve the problem that above-mentioned prior art exists, can reduce furnace surface heat dissipation loss, can also require the air distribution by oneself according to furnace pressure, do not have unnecessary temperature air that mixes, reach energy-conserving purpose.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides a hot air supply system for FCC catalyst spray drying, which comprises a hot-blast stove and a combustion-supporting fan, wherein the stove body of the hot-blast stove is of a double-layer sleeve type structure, two layers of sleeves are respectively an inner cylinder and an outer cylinder, an annular gap is left between the inner cylinder and the outer cylinder, and a burner is arranged at the air inlet of the hot-blast stove; one end of the combustion-supporting fan is connected with combustion-supporting air, and the other end of the combustion-supporting fan is communicated with an air inlet of the hot blast stove; the bottom of the hot blast stove is also provided with a gas inlet and two temperature mixing ports; an air outlet is formed in the top of the hot blast stove.
Preferably, the inner cylinder is wrapped in the outer cylinder, and the tops of the inner cylinder and the outer cylinder are communicated.
Preferably, the inner cylinder is cylindrical, and the outer cylinder comprises a lower cylinder and an upper conical cylinder which are integrally connected; the bottoms of the inner cylinder and the outer cylinder are closed.
Preferably, a plurality of turbulence branch pipes are uniformly arranged on the outer wall of the inner cylinder, the air inlet ends of the turbulence branch pipes face towards an annular gap between the inner cylinder and the outer cylinder, and the air outlet ends of the turbulence branch pipes incline upwards and face towards the inside of the inner cylinder.
Preferably, a baffle plate is arranged in an annular gap between the inner cylinder and the outer cylinder, and the baffle plate is axially welded on the inner wall of the outer cylinder.
Preferably, the hot blast stove is horizontally or vertically installed, and the burner is installed at the bottom of the stove body.
Preferably, the two temperature mixing ports are a first temperature mixing port and a second temperature mixing port respectively, and temperature mixing air enters an annular gap between the inner cylinder and the outer cylinder of the furnace body from the first temperature mixing port; the temperature mixing port is used for self-sucking air of the furnace body.
Preferably, the gas inlet is for natural gas intake.
Preferably, a third mixed temperature port is formed in one side of the upper part of the hot blast stove and used for introducing roasting tail gas.
The utility model discloses following beneficial technological effect has been gained for prior art:
the hot air furnace adopted by the hot air system of the FCC catalyst spray drying hot air supply system has a double-layer sleeve type structure without a lining heat-insulating layer, and has the advantages that the temperature of the outer surface of the hearth can be reduced to normal temperature, and the heat dissipation loss of the surface of the hearth is reduced; the hot blast stove adopts self-suction type temperature mixing air, has the advantages that the temperature mixing air quantity changes along with the change of the pressure in the stove, the air is automatically distributed according to the pressure requirement, no redundant temperature mixing air exists, and the purpose of energy saving is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only 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 flow chart of a hot air supply system;
FIG. 2 is a schematic structural view of a hot blast stove;
wherein, a-the hot blast stove; b-a combustion-supporting fan; 1-outer cylinder; 2-inner cylinder; 3-a burner; 4, air outlet; 5-baffle plate; 6-a turbulent branch pipe; 7-mixing the temperature port I; 8-mixed temperature mouth two; 9-combustion-supporting air inlet; 10-a gas inlet; 11-mixed temperature port three.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.
The utility model aims at providing a hot-blast supply system of FCC catalyst spray drying to solve the problem that above-mentioned prior art exists, can reduce furnace surface heat dissipation loss, can also require the air distribution by oneself according to furnace pressure, do not have unnecessary temperature air that mixes, reach energy-conserving purpose.
The utility model provides a hot air supply system for FCC catalyst spray drying, which comprises a hot blast stove and a combustion fan, wherein the stove body of the hot blast stove is of a double-layer sleeve type structure, two layers of sleeves are respectively an inner cylinder and an outer cylinder, an annular gap is left between the inner cylinder and the outer cylinder, and a burner is arranged at the air inlet of the hot blast stove; one end of the combustion-supporting fan is connected with combustion-supporting air, and the other end of the combustion-supporting fan is communicated with an air inlet of the hot blast stove; the bottom of the hot blast stove is also provided with a gas inlet and two temperature mixing ports; the top of the hot blast stove is provided with an air outlet.
Mixing and burning natural gas and air from a combustion fan at a burner of the hot blast stove to form high-temperature hot flue gas, wherein the interior of the hot blast stove is at micro negative pressure; the system feeds air required by self-priming into the hot blast stove from a mixed temperature port, and the circulating air from the spray drying system enters the hot blast stove from the other mixed temperature port of the hot blast stove; the hot blast stove is a double-layer sleeve type, an annular gap is arranged between the inner cylinder and the outer cylinder, circulating gas of the spray drying system firstly enters the annular gap between the inner cylinder and the outer cylinder of the hot blast stove for preheating, and then enters the conical end of the outer cylinder of the hot blast stove to be mixed with the inner cylinder and hot combustion smoke; high-temperature hot flue gas, mixed-temperature air, self-absorption air and roasting tail gas from a roasting system which are generated by combustion are mixed, and finally, the mixed gas is output from an air outlet of the hot blast stove.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1-2, the present embodiment provides an FCC catalyst spray drying hot air supply system, where the hot air system mainly includes a hot air furnace a and a combustion fan b, as shown in fig. 1:
the combustion-supporting fan b is communicated with a combustion-supporting air inlet 9 of the hot blast stove a, natural gas and air from the combustion-supporting fan b are mixed and combusted in a combustor 3 of the hot blast stove a to form high-temperature hot flue gas, and at the moment, micro negative pressure exists in the hot blast stove a; the system feeds air required by self-priming into the hot blast stove a from the second mixing temperature port 8; and circulating gas from the spray drying system enters the hot blast stove a from a first temperature mixing opening 7 of the hot blast stove a. The hot-blast stove a is a double-layer sleeve type, an annular gap is arranged between the inner cylinder and the outer cylinder, the inner cylinder 2 is lower than the outer cylinder 1, circulating gas of a spray drying system firstly enters the annular gap between the inner cylinder and the outer cylinder of the hot-blast stove a for preheating, and then enters the conical end of the outer cylinder 1 of the hot-blast stove a and the inner cylinder 2 through the end of the annular gap of the double-layer sleeve and the turbulence branch pipe 6 and is mixed with hot combustion smoke; high-temperature hot flue gas, circulating gas and self-sucking air generated by combustion are mixed in the hot blast stove a and then mixed with roasting tail gas which enters from the third mixed temperature port 11 and comes from a roasting system at 600 ℃, and finally the mixed gas is output from the system through an air outlet 4 of the hot blast stove a.
In this embodiment, the double-layered sleeve type structure of the hot-blast stove a has no lining heat-insulating layer, so that the temperature of the stove can be rapidly increased and decreased. The height of the inner cylinder 2 is lower than that of the outer cylinder 1, the inner cylinder 2 is wrapped by the outer cylinder 1, the top of the outer cylinder 1 is provided with a conical end, the inner cylinder 2 is free of a conical section, the bottoms of the inner cylinder and the outer cylinder are closed, the top of the inner cylinder and the top of the outer cylinder are not closed, an annular gap is formed between the inner cylinder and the outer cylinder, a baffle plate 5 is arranged in the annular gap, the baffle plate 5 is welded on the inner wall of the outer cylinder 1 along the axial direction to form a flow channel, most of mixed temperature air enters from the flow channel, the temperature of tail gas of the part is lower, the temperature difference between the outer cylinder 1 of the hot blast stove.
Further, in one embodiment of the present invention, the hot blast stove a is installed horizontally or vertically, and the burner 3 is installed at the bottom of the stove body. The fuel gas completes the whole combustion process in the hearth 2 of the inner barrel 2 to generate high-temperature flue gas; the mixed temperature air is divided into two streams, the small part enters the combustion chamber from the second mixed temperature port 8 at the lower part of the furnace body, and the second mixed temperature port 8 is uniformly distributed at the bottom of the furnace body; most of the mixed temperature air enters the annular space between the inner cylinder body and the outer cylinder body of the furnace body from the mixed temperature opening I7, enters the tip cone end of the outer cylinder 1 at the tail end of the annular space of the double-layer sleeve, forms strong rotary disturbance airflow, is fully mixed at the tip cone end of the outer cylinder 1, and the mixed flue gas temperature is discharged from the air outlet 4.
In another embodiment of the utility model, the fuel gas completes the whole combustion process in the hearth of the inner barrel 2 to generate high-temperature flue gas; the mixed temperature air enters the combustion chamber from a second mixed temperature port 8 at the lower part of the furnace body, and the second mixed temperature port 8 is uniformly distributed at the bottom of the furnace body; other mixed temperature gas enters the annular gap between the inner cylinder body and the outer cylinder body of the furnace body from the first mixed temperature opening 7, enters the tip cone end of the outer cylinder 1 from the tail end, enters the mixing chamber, forms strong rotation disturbance airflow, is fully mixed at the tail end of the inner cylinder 2, and is discharged from the air outlet 4 without a third mixed temperature opening 11.
It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (9)
1. An FCC catalyst spray drying hot air supply system, characterized by: the hot blast stove comprises a hot blast stove and a combustion-supporting fan, wherein a stove body of the hot blast stove is of a double-layer sleeve type structure, two layers of sleeves are respectively an inner cylinder and an outer cylinder, an annular gap is reserved between the inner cylinder and the outer cylinder, and a burner is arranged at an air inlet of the hot blast stove; one end of the combustion-supporting fan is connected with combustion-supporting air, and the other end of the combustion-supporting fan is communicated with an air inlet of the hot blast stove; the bottom of the hot blast stove is also provided with a gas inlet and two temperature mixing ports; an air outlet is formed in the top of the hot blast stove.
2. The FCC catalyst spray-drying hot blast supply system of claim 1, wherein: the inner cylinder is coated in the outer cylinder, and the tops of the inner cylinder and the outer cylinder are communicated.
3. The FCC catalyst spray-drying hot blast supply system of claim 2, wherein: the inner cylinder is cylindrical, and the outer cylinder comprises a lower cylinder and an upper conical cylinder which are integrally connected; the bottoms of the inner cylinder and the outer cylinder are closed.
4. The FCC catalyst spray-drying hot blast supply system of claim 1, wherein: a plurality of turbulence branch pipes are evenly arranged on the outer wall of the inner barrel, the air inlet ends of the turbulence branch pipes face towards an annular gap between the inner barrel and the outer barrel, and the air outlet ends incline upwards and face towards the inside of the inner barrel.
5. The FCC catalyst spray-drying hot blast supply system of claim 1, wherein: and a baffle plate is arranged in an annular gap between the inner cylinder and the outer cylinder, and the baffle plate is axially welded on the inner wall of the outer cylinder.
6. The FCC catalyst spray-drying hot blast supply system of claim 1, wherein: the hot blast stove is horizontally or vertically installed, and the burner is installed at the bottom of the stove body.
7. The FCC catalyst spray-drying hot blast supply system of claim 1, wherein: the two temperature mixing ports are respectively a first temperature mixing port and a second temperature mixing port, and temperature mixing air enters an annular gap between the inner cylinder and the outer cylinder of the furnace body from the first temperature mixing port; the temperature mixing port is used for self-sucking air of the furnace body.
8. The FCC catalyst spray-drying hot blast supply system of claim 1, wherein: the gas inlet is used for natural gas inlet.
9. The FCC catalyst spray-drying hot blast supply system of claim 1, wherein: and a third mixed temperature port is formed in one side of the upper part of the hot blast stove and is used for introducing roasting tail gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020934356.3U CN212566775U (en) | 2020-05-28 | 2020-05-28 | Hot-blast supply system of FCC catalyst spray drying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020934356.3U CN212566775U (en) | 2020-05-28 | 2020-05-28 | Hot-blast supply system of FCC catalyst spray drying |
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| Publication Number | Publication Date |
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| CN212566775U true CN212566775U (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020934356.3U Active CN212566775U (en) | 2020-05-28 | 2020-05-28 | Hot-blast supply system of FCC catalyst spray drying |
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| CN (1) | CN212566775U (en) |
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2020
- 2020-05-28 CN CN202020934356.3U patent/CN212566775U/en active Active
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