Mixing, conveying and dedusting integrated device for catalytic cracking unit

Abstract

The utility model relates to a mixing, conveying and dedusting integrated device for a catalytic cracking unit, and belongs to the technical field of petrochemical engineering. Comprising a tank body, an air inlet valve, a feeding valve, a reverse blowing valve, an exhaust valve, a metal filter element, a pressure transmitter, a fluidization mixer, a blowing valve group, a discharging valve, an ejector, a conveying valve, a first-path pressure gauge, a second-path pressure gauge, a second-path adjusting valve and a first-path adjusting valve. Various assistants of the catalytic cracking device are added into the mixing and conveying integrated tank according to a certain proportion through the mixing, conveying and dust removing integrated device disclosed by the utility model, and the different assistants are conveyed to the next process flow after being uniformly and pneumatically mixed in the mixing, conveying and dust removing integrated tank; dust-containing gas generated during mixing is filtered by a pressure-resistant metal filter element, and then clean gas is discharged, so that the environment-friendly requirement is met; various processes such as mixing of various assistants, air filtration and dust removal and pneumatic conveying are realized, so that the working efficiency and the operation stability of the catalytic device are improved.

Description

Technical Field

[0001] The utility model relates to a multifunctional integrated device for adding multiple additives to a catalytic cracking unit of a domestic refinery during the production process. After the additives are proportioned and enter the device, they are mixed evenly, densely transported, and filtered under pressure. The system is mainly used for catalytic cracking units in petrochemical enterprises and is a mixing, conveying, and dust removal integrated device for catalytic cracking units, belonging to the technical field of petrochemical industry. Background Art

[0002] At present, the combustion aids and desulfurization and denitrification additives of the catalytic cracking units of domestic refineries are usually added to the regenerator in a single-agent interval manner. Due to the addition and feeding of a single additive, the combustion aid and the desulfurization and denitrification agents are not mixed evenly, which affects the charring effect of the regenerator, and also affects the effect of desulfurization and denitrification, which is not conducive to the overall stable operation of the device.

[0003] At present, the commonly used equipment on the market only has a single function of mixing, conveying, or dust removal, and takes up a lot of space and requires a relatively large investment.

[0004] Equipment with integrated functions of mixing, conveying and dust removal has broad application prospects. Therefore, a mixed conveying and dust removal integrated device for catalytic cracking units is provided, and a variety of additives are added to the mixed conveying integrated tank in a certain proportion. The coefficient of the tank loading additives is 0.2-0.6. Different additives are evenly mixed in the mixed conveying and dust removal integrated tank by pneumatic force and then transported to the next process flow. The dust-containing gas generated during mixing is filtered through a pressure-resistant metal filter element and then discharged as clean gas, meeting environmental protection requirements; the structure is compact and easy to operate, and can be widely used in the production and operation of catalytic cracking units, improving work efficiency and device operation efficiency. At the same time, through the equipment of the utility model, it can ensure the uniform mixing of additives, which helps to improve the performance and stability of the catalytic cracking unit, and has become a technical problem that needs to be solved urgently in this technical field. Summary of the invention

[0005] The purpose of the utility model is to provide an integrated mixing, conveying and dust removal device for a catalytic cracking unit, wherein a plurality of additives are added to the integrated mixing, conveying and dust removal tank in a certain proportion, the coefficient of the tank body loading the additives is 0.2-0.6, and the different additives are evenly mixed by pneumatic force in the integrated mixing, conveying and dust removal tank and then conveyed to the next process flow, and the dust-containing gas generated during the mixing is filtered through a pressure-resistant metal filter element and then the clean gas is discharged, thereby meeting environmental protection requirements; the device of the utility model has a compact structure and is easy to operate, and can be widely used in the production and operation of the catalytic cracking unit, thereby improving work efficiency and device operation efficiency, and at the same time, through the equipment of the utility model, it can ensure that the additives are mixed evenly, which helps to improve the performance and stability of the catalytic cracking unit.

[0006] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0007] A mixed conveying and dust removal integrated device for a catalytic cracking unit, characterized in that it comprises a tank body, an air intake valve, a feed valve, a back-blowing valve, an exhaust valve, a metal filter element, a pressure transmitter, a fluidized mixer, a blow valve group, a discharge valve, an ejector, a conveying valve, a first-way pressure gauge, a second-way pressure gauge, a second-way regulating valve, and a first-way regulating valve; the metal filter element is arranged in the top of the tank body, the back-blowing valve is connected to the metal filter element through a pipeline, the exhaust valve is installed on one side of the top of the tank body, the feed valve is installed on one side of the upper part of the tank body, the pressure transmitter is installed on the other side of the upper part of the tank body, and one end of the air intake valve is installed on the other side of the upper part of the tank body. It is connected to the upper part of the tank body, one end of the air inlet valve is connected to the second pipeline, the fluidized mixer is located at the cone of the tank body, the bottom end of the fluidized mixer is connected to the inlet of the discharge valve, the outlet of the discharge valve is connected to the injector, the injector is connected to the delivery target tank, the first pressure regulating valve is connected to the first pressure gauge, the first pressure gauge is connected to the injection valve through a pipeline, the second pressure regulating valve is connected to the second pressure gauge, the second pressure gauge is respectively connected to the air inlet valve and the delivery valve through pipelines, the other end of the delivery valve is connected to the injector, and the injector is connected to the additive storage bin.

[0008] Preferably, the fluidizing mixer comprises a fluidizing mixer cavity, a spray valve, and a fluidizing piston sealing connecting rod mechanism; the spray valve is connected to the fluidizing piston sealing connecting rod mechanism, and the piston sealing connecting rod mechanism is connected to the fluidizing mixer cavity.

[0009] Preferably, the blowing valves are provided in 6 groups.

[0010] Beneficial effects:

[0011] The utility model is a mixed conveying and dust removal integrated device for catalytic cracking unit. From the time when the additive is added to the mixing and conveying tank, to the end of conveying to the additive silo, the additive entering the tank body is uniformly mixed through a fluidized mixer by compressed air of 0.3-0.8Mpa, and the dust-containing gas during mixing is discharged through the dust collector on the top of the tank, and then transported to the additive silo through dense phase. Thus, a multifunctional integrated device for additive mixing, dust removal and conveying is realized.

[0012] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations, but this does not necessarily limit the scope of protection of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of the integrated mixing, conveying and dust removal device used in a catalytic cracking unit in Example 1 of the utility model.

[0014] Figure 2-1It is a side structural schematic diagram of the fluidized mixer in the integrated mixing, conveying and dust removal device used in the catalytic cracking unit in Example 1 of the utility model.

[0015] Figure 2-2 It is a schematic diagram of the top view of the structure of the fluidized mixer in the integrated mixing, conveying and dust removal device used in the catalytic cracking unit in Example 1 of the utility model.

[0016] Names of main parts in the attached figure:

[0017] 1 tank 2 air inlet valve

[0018] 3 Feed valve 4 Backflush valve

[0019] 5 Exhaust valve 6 Metal filter

[0020] 7 Pressure transmitter 8 Fluidizing mixer

[0021] 9 injection valve group 10 discharge valve

[0022] 11 ejector 12 delivery valve

[0023] 13 First pressure gauge 14 Second pressure gauge

[0024] 15 Second way regulating valve 16 First way regulating valve

[0025] 8-1 Fluidized mixer cavity 8-2 Spray valve

[0026] 8-3 Fluidized piston seal connecting rod mechanism DETAILED DESCRIPTION

[0027] Unless otherwise specified, the components used in the following embodiments of the present invention are all conventional components available on the market in this technical field; the equipment not described in detail is equipment that can be purchased on the market, and the control systems used are all conventional control systems in this technical field.

[0028] Example 1

[0029] like Figure 1As shown, it is a structural schematic diagram of the mixed conveying and dust removal integrated device for catalytic cracking unit in Example 1 of the utility model; wherein 1 is a tank body, 2 is an air intake valve, 3 is a feed valve, 4 is a back-blowing valve, 5 is an exhaust valve, 6 is a metal filter element, 7 is a pressure transmitter, 8 is a fluidized mixer, 9 is a spray valve group, 10 is a discharge valve, 11 is an ejector, 12 is a conveying valve, 13 is a first-way pressure gauge, 14 is a second-way pressure gauge, 15 is a second-way regulating valve, and 16 is a first-way regulating valve; the utility model is a mixed conveying and dust removal integrated device for catalytic cracking unit, comprising a tank body 1, an air intake valve 2, a feed valve 3, a back-blowing valve 4, an exhaust valve 5, a metal filter element 6, a pressure transmitter 7, a fluidized mixer 8, a spray valve group 9, a discharge valve 10, an ejector 11, a conveying valve 12, a first-way pressure gauge 13, a second-way pressure gauge 14, a second-way regulating valve 15, and a first-way regulating valve 16; the metal filter element 6 is arranged in the tank In the top of the tank body 1, the back-blowing valve 4 is connected to the metal filter element 6 through a pipeline, the exhaust valve 5 is installed on one side of the top of the tank body 1, the feed valve 3 is installed on one side of the upper part of the tank body 1, the pressure transmitter 7 is installed on the other side of the upper part of the tank body 1, one end of the air intake valve 2 is connected to the upper part of the tank body 1, one end of the air intake valve 2 is connected to the second pipeline, the fluidized mixer 8 is located at the cone of the tank body 1, the bottom end of the fluidized mixer 8 is connected to the inlet of the discharge valve 10, the outlet of the discharge valve 10 is connected to the ejector 11, the ejector 11 is connected to the transport target storage tank, the first pressure regulating valve 16 is connected to the first pressure gauge 13, the first pressure gauge 13 is connected to the blowing valve 9 through a pipeline, the second pressure regulating valve 15 is connected to the second pressure gauge 14, the second pressure gauge 14 is connected to the air intake valve 2 and the delivery valve 12 through pipelines, the other end of the delivery valve 12 is connected to the ejector 11, and the ejector 11 is connected to the auxiliary agent storage bin;

[0030] like Figure 2-1 As shown, it is a schematic diagram of the side structure of the fluidized mixer in the integrated mixing, conveying and dust removal device for the catalytic cracking device in Example 1 of the utility model; Figure 2-2 As shown, it is a schematic diagram of the top view of the fluidized mixer in the integrated mixing, conveying and dust removal device for the catalytic cracking unit in Example 1 of the utility model; wherein 8-1 is the fluidized mixer cavity, 8-2 is the injection valve, and 8-3 is the fluidized piston sealing connecting rod mechanism; the fluidized mixer includes the fluidized mixer cavity 8-1, the injection valve 8-2, and the fluidized piston sealing connecting rod mechanism 8-3; the fluidized mixer cavity 8-1 is provided with 6 groups of injection valves 8-2, each group of injection valves 8-2 is connected to the fluidized piston sealing connecting rod mechanism 8-3, and the piston sealing connecting rod mechanism 8-3 is connected to the fluidized mixer cavity 8-1.

[0031] The operation steps of the integrated mixed conveying and dust removal device for catalytic cracking device in Example 1 of the utility model are as follows: after the proportion of multiple additives is mixed, the feed valve 3 and the exhaust valve 5 are opened, and the additives flow into the tank body 1 by their own weight. When the set weight is reached, the feed valve 3 is closed, and the compressed air passes through the first pressure regulating valve 16, and the injection valve 9 is opened and injected for 0.5 to 1 second. The additives roll upward along the set running track in the tank body 1, and the upward pulsating additives are blocked by the metal filter element 6 and fall down. The dust-containing gas passes through the metal filter element 6, and after being filtered into clean gas, it passes through the exhaust valve 7. The additives attached to the outer surface of the metal filter element 6 are discharged, cleaned and regenerated by the back-blowing valve 4. After the additives are evenly mixed, the exhaust valve 5 is closed, and the compressed air passes through the second pressure regulating valve 16, and the air inlet valve 2 is opened to start filling the tank body 1. When the high pressure point set by the pressure transmitter 7 is reached, the delivery valve 12 and the discharge valve 10 are opened in sequence to start conveying to the additive storage bin. When the pressure transmitter 7 reaches the low pressure point, the conveying is completed, and a new cycle of feeding, mixing and conveying is restarted until the additive bin reaches the high material level and the feeding is stopped;

[0032] The operating mechanism of the fluidized mixer 8 is as follows: the compressed air passes through the set pressure of the first regulating valve 16, and opens the three groups of spray valves 8-2 on the left side of the fluidized mixer 8. The compressed air forms a certain impact on the additive in the tank body 1 through the gap of the fluidized piston sealing connecting rod mechanism 8-3. The additive instantly rolls to the right along the movement trajectory of the air pressure in the tank body 1. After spraying for 0.5 to 1 second, stop for 3 to 10 seconds, wait for the pressure to rise, and open the three groups of spray valves 8-2 on the right side again. The additive instantly rolls to the left along the movement trajectory of the air pressure in the tank. The spraying is repeated alternately until the mixing is carried out for 5 to 15 minutes, so that the additive is evenly mixed.

[0033] The utility model is an integrated mixing, conveying and dust removal device for a catalytic cracking unit. The entire process starts with the mixing of the proportioned auxiliary agents into a tank, and is realized through a multifunctional device integrating auxiliary agent mixing, conveying and dust removal.

[0034] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical scheme and utility model concept of the utility model, shall be covered by the protection scope of the utility model.

Claims

1. A mixed conveying and dust removal integrated device for a catalytic cracking unit, characterized in that: It includes a tank body, an air inlet valve, a feed valve, a back-blowing valve, an exhaust valve, a metal filter element, a pressure transmitter, a fluidized mixer, a spray valve group, a discharge valve, an ejector, a delivery valve, a first-way pressure gauge, a second-way pressure gauge, a second-way regulating valve, and a first-way regulating valve; the metal filter element is arranged at the top of the tank body, the back-blowing valve is connected to the metal filter element through a pipeline, the exhaust valve is installed on one side of the top of the tank body, the feed valve is installed on one side of the upper part of the tank body, the pressure transmitter is installed on the other side of the upper part of the tank body, one end of the air inlet valve is connected to the upper part of the tank body, and one end of the air inlet valve is connected to the upper part of the tank body. The first end of the fluidized mixer is connected to the inlet of the discharge valve, the outlet of the discharge valve is connected to the injector, the injector is connected to the delivery target tank, the first pressure regulating valve is connected to the first pressure gauge, the first pressure gauge is connected to the injection valve through a pipeline, the second pressure regulating valve is connected to the second pressure gauge, the second pressure gauge is respectively connected to the intake valve and the delivery valve through pipelines, the other end of the delivery valve is connected to the injector, and the injector is connected to the additive storage bin.

2. The integrated mixing, conveying and dust removal device for a catalytic cracking unit according to claim 1, characterized in that: The fluidizing mixer comprises a fluidizing mixer cavity, a spray valve, and a fluidizing piston sealing connecting rod mechanism; the spray valve is connected to the fluidizing piston sealing connecting rod mechanism, and the piston sealing connecting rod mechanism is connected to the fluidizing mixer cavity.

3. The integrated mixing, conveying and dust removal device for a catalytic cracking unit according to claim 2, characterized in that: The spray valves are provided with 6 groups.

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