Anti-blocking backwashing device for delayed coking closed decoking overflow

Abstract

The utility model provides a delayed coking closed decoking overflow anti-blocking backwashing device, which comprises a tee joint, a washing water pipe, a plurality of branch pipes and a plurality of nozzles, the washing water pipe is arranged in the tee joint, the plurality of branch pipes are connected with one end of the washing water pipe, and the other end of the washing water pipe is connected with the nozzle. The multiple nozzles are installed at the free ends of the multiple branch pipes in a one-to-one correspondence mode. Flushing water enters the nozzles and is uniformly sprayed to the filter screen to wash away coke particles blocking meshes, and it is guaranteed that overflow water can flow out normally. The problem that an overflow opening is blocked in the solid-liquid overflow separation process of coke and water is solved, the caliber of an overflow pipe opening can be reduced, smaller filter screen meshes can be selected according to the process requirements, solid particles are prevented from being brought out by liquid to the maximum extent, and the equipment investment and the operation cost are effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of closed decoking technology for delayed coking equipment, and in particular to a backwashing device for preventing overflow blockage in closed decoking of delayed coking equipment. Background Technology

[0002] Delayed coking is a process in which inferior raw materials such as residual oil are thermally cracked in a coking tower to convert them into gaseous and liquid products, while simultaneously generating petroleum coke (coke). The generated petroleum coke remains in the coking tower, where it is then cut by high-pressure water. The cut coke, along with the cutting water, flows into an open-air coke storage pool. Due to the temperature of the coke, it collects in the pool after contacting the cutting water. This process releases a certain amount of toxic and harmful volatile organic compounds, and the unorganized emission of these gases pollutes the atmosphere.

[0003] In recent years, the constraints and governance of energy and environmental protection have put forward new requirements for the development of the petrochemical industry. With the increasing supervision of the petrochemical industry by environmental protection policies, there is a great market demand for closed decoking technology.

[0004] In the process of achieving closed decoking, the separation of coke and water is a key step. This process is achieved through overflow, and a filter screen is used at the overflow point. During the overflow process, the mesh of the filter screen will gradually be blocked by solid particles carried out by the liquid. As the overflow time continues, the mesh blockage rate will gradually increase, which will seriously affect the liquid outflow. Preventing mesh blockage is the key to ensuring that the overflow can proceed normally.

[0005] Currently, the main measures to prevent blockage during solid-liquid overflow separation of coke and water are to increase the diameter of the overflow pipe, increase the height of the overflow port of the equipment, and enlarge the mesh size of the filter screen. However, this results in the overflow pipe having an excessively large diameter, occupying a lot of space, increasing the height of the equipment, and causing the overflowing liquid to carry more solid particles, which increases the difficulty of subsequent treatment. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a delayed coking closed decoking overflow anti-clogging backwashing device to address the shortcomings of the existing technology.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a delayed coking sealed decoking overflow anti-blocking backwashing device, comprising: a tee, a flushing water pipe, multiple branch pipes, and multiple nozzles, wherein the flushing water pipe is installed in the tee, the multiple branch pipes are all connected to one end of the flushing water pipe, and the multiple nozzles are installed one-to-one at the free ends of the multiple branch pipes.

[0008] The beneficial effects of adopting this utility model's technical solution are as follows: Rinsing water enters the nozzle and is evenly sprayed onto the filter screen, washing away coke particles clogging the mesh and ensuring the overflow water can flow out normally. This solves the problem of overflow port blockage during the solid-liquid overflow separation process of coke and water, allowing for a reduction in the overflow pipe diameter. Smaller filter screen meshes can be selected according to process requirements, minimizing the amount of solid particles carried out by the liquid, effectively reducing equipment investment and operating costs.

[0009] Furthermore, both the first and second ends of the tee are equipped with flanges. The first end of the tee is connected to the flange of the overflow device through the flange, and the second end of the tee is connected to a flange cover through the flange. One end of the flushing water pipe passes through the flange cover and is connected to multiple branch pipes.

[0010] The beneficial effects of adopting the above-mentioned further technical solutions are: the flange facilitates the connection between the tee and the overflow equipment, and facilitates the installation and maintenance of the tee. The flange cover facilitates the installation and maintenance of the flushing water pipe and provides stable support for the flushing water pipe.

[0011] Furthermore, the flange cover has an opening, the flushing water pipe is installed in the opening, and the flushing water pipe is welded to the flange cover.

[0012] The beneficial effects of adopting the above-mentioned further technical solution are: it facilitates the stable connection between the flushing water pipe and the flange cover, prevents the flushing water pipe from shaking and being pulled out of the flange cover, and improves the stability and reliability of the delayed coking closed decoking overflow anti-blockage backwashing device.

[0013] Furthermore, the other end of the flushing water pipe is connected to external flushing water, and a flushing water valve is installed on the flushing water pipe.

[0014] The beneficial effects of adopting the above-mentioned further technical solution are: during use, the flushing function can be turned on or off by controlling the switch of the flushing water valve on the flushing water pipe, which is flexible, convenient and reliable.

[0015] Furthermore, the tee is an equal diameter tee.

[0016] The advantages of adopting the above-mentioned further technical solutions are: it facilitates the installation and maintenance of tees, reduces costs, and simplifies the structure.

[0017] Furthermore, the number of branch pipes is four, the branch pipes are bent pipes, one end of the flushing water pipe is equipped with a blocking plate, and the four branch pipes are arranged around the blocking plate.

[0018] The beneficial effects of adopting the above-mentioned further technical solution are: the four branch pipes are arranged around the blockage plate, which facilitates rinsing different parts of the filter screen and improves rinsing efficiency.

[0019] Furthermore, the nozzle has a pigtail-shaped turbulence structure.

[0020] The beneficial effects of adopting the above-mentioned further technical solution are: the water spray end has a pig tail-shaped turbulence structure, which can atomize and distribute water flow, effectively preventing filter screen clogging.

[0021] Furthermore, the multiple nozzles are arranged near the filter screen of the overflow device.

[0022] The beneficial effect of adopting the above-mentioned further technical solution is: a device to prevent the filter screen at the overflow port from becoming clogged during solid-liquid overflow separation of coke and water.

[0023] Furthermore, the multiple nozzles are threadedly installed one-to-one on the free ends of the multiple branch pipes.

[0024] The beneficial effect of adopting the above-mentioned further technical solution is that the nozzle and the branch pipe are connected by threads, which facilitates the installation and maintenance of the nozzle.

[0025] Furthermore, the nozzle is made of 304 stainless steel.

[0026] The beneficial effects of adopting the above-mentioned further technical solution are: the nozzle is made of 304 stainless steel, which improves the nozzle's corrosion resistance and extends its service life.

[0027] The advantages of this invention in its additional aspects 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. Attached Figure Description

[0028] Figure 1 This is one of the structural schematic diagrams of the delayed coking closed decoking overflow anti-clogging backwashing device provided in the embodiments of this utility model.

[0029] Figure 2 The second schematic diagram of the delayed coking closed decoking overflow anti-clogging backwashing device provided in the embodiment of this utility model.

[0030] The following are the symbols in the attached diagram: 1. Tee; 2. Flushing water pipe; 3. Branch pipe; 4. Nozzle; 5. Blocking plate. Detailed Implementation

[0031] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0032] like Figure 1 and Figure 2As shown, this utility model embodiment provides a delayed coking sealed decoking overflow anti-clogging backwashing device, including: a tee 1, a flushing water pipe 2, multiple branch pipes 3, and multiple nozzles 4. The flushing water pipe 2 is installed in the tee 1, and the multiple branch pipes 3 are all connected to one end of the flushing water pipe 2. The multiple nozzles 4 are installed one-to-one at the free ends of the multiple branch pipes 3.

[0033] The beneficial effects of adopting this utility model's technical solution are as follows: Rinsing water enters the nozzle and is evenly sprayed onto the filter screen, washing away coke particles clogging the mesh and ensuring the overflow water can flow out normally. This solves the problem of overflow port blockage during the solid-liquid overflow separation process of coke and water, allowing for a reduction in the overflow pipe diameter. Smaller filter screen meshes can be selected according to process requirements, minimizing the amount of solid particles carried out by the liquid, effectively reducing equipment investment and operating costs.

[0034] In the process of separating coke and water using an overflow method, there are currently no related patents or technological applications for overflow port filter backwashing technology.

[0035] The purpose of this invention is to solve the problem of overflow port blockage during the solid-liquid overflow separation process of coke and water. It can reduce the diameter of the overflow pipe and select a smaller filter screen according to process requirements to minimize the amount of solid particles carried out by the liquid, thereby effectively reducing equipment investment and operating costs.

[0036] This invention relates to a device for preventing filter clogging at the overflow port during solid-liquid overflow separation of coke and water (delayed coking closed decoking overflow anti-clogging backwashing device). It is a tee of equal diameter, with two ports (the first and second ends of the tee) welded to flanges. One flange connects to the flange of the overflow device, and the other flange connects to a flange cover. A flushing water pipe is inserted through an opening in the flange cover. The flushing water pipe is welded to the flange cover at its intersection. Four smaller pipes (branch pipes 3) branch off from the end of the water pipe closest to the overflow device. Each smaller pipe is connected to an anti-clogging nozzle (nozzle 4). The other end of the flushing water pipe is connected to external flushing water. During use, the flushing function can be turned on or off by controlling the valve (flushing water valve) on the flushing water pipe. The operation is flexible, convenient, and reliable.

[0037] Compared with the prior art, the present invention has the following advantages:

[0038] (1) Simple structure, good flushing effect, and effective suppression and anti-clogging.

[0039] (2) Low investment, saving labor costs and improving production efficiency.

[0040] (3) It can effectively solve the problem of filter clogging.

[0041] (4) Easy to install and maintain.

[0042] like Figure 1 and Figure 2 As shown, further, both the first and second ends of the tee 1 are equipped with flanges. The first end of the tee 1 is connected to the flange of the overflow device through the flange, and the second end of the tee 1 is connected to a flange cover through the flange. One end of the flushing water pipe 2 passes through the flange cover and is connected to multiple branch pipes 3.

[0043] The beneficial effects of adopting the above-mentioned further technical solutions are: the flange facilitates the connection between the tee and the overflow equipment, and facilitates the installation and maintenance of the tee. The flange cover facilitates the installation and maintenance of the flushing water pipe and provides stable support for the flushing water pipe.

[0044] like Figure 1 and Figure 2 As shown, the flange cover is further provided with an opening, the flushing water pipe 2 is installed in the opening, and the flushing water pipe 2 is welded to the flange cover.

[0045] The beneficial effects of adopting the above-mentioned further technical solution are: it facilitates the stable connection between the flushing water pipe and the flange cover, prevents the flushing water pipe from shaking and being pulled out of the flange cover, and improves the stability and reliability of the delayed coking closed decoking overflow anti-blockage backwashing device.

[0046] like Figure 1 and Figure 2 As shown, the other end of the flushing water pipe 2 is connected to external flushing water, and a flushing water valve is installed on the flushing water pipe 2.

[0047] The beneficial effects of adopting the above-mentioned further technical solution are: during use, the flushing function can be turned on or off by controlling the switch of the flushing water valve on the flushing water pipe, which is flexible, convenient and reliable.

[0048] The other end of the flushing water pipe 2 can be fitted with a flange, and the other end of the flushing water pipe 2 is connected to external flushing water through the flange.

[0049] like Figure 1 and Figure 2 As shown, the tee 1 is further described as an equal diameter tee.

[0050] The advantages of adopting the above-mentioned further technical solutions are: it facilitates the installation and maintenance of tees, reduces costs, and simplifies the structure.

[0051] like Figure 1 and Figure 2 As shown, further, there are four branch pipes 3, each branch pipe 3 is a bend, and a blocking plate 5 is installed at one end of the flushing water pipe 2. The four branch pipes 3 are arranged around the blocking plate 5.

[0052] The beneficial effects of adopting the above-mentioned further technical solution are: the four branch pipes are arranged around the blockage plate, which facilitates rinsing different parts of the filter screen and improves rinsing efficiency.

[0053] like Figure 1 and Figure 2 As shown, the nozzle 4 is further described as a pigtail-type turbulence structure.

[0054] The beneficial effects of adopting the above-mentioned further technical solution are: the water spray end has a pig tail-shaped turbulence structure, which can atomize and distribute water flow, effectively preventing filter screen clogging.

[0055] Furthermore, the multiple nozzles 4 are arranged near the filter screen of the overflow device.

[0056] The beneficial effect of adopting the above-mentioned further technical solution is: a device to prevent the filter screen at the overflow port from becoming clogged during solid-liquid overflow separation of coke and water.

[0057] Multiple nozzles 4 can be located at the bottom of the filter screen.

[0058] Furthermore, the plurality of nozzles 4 are threadedly installed one-to-one on the free ends of the plurality of branch pipes 3.

[0059] The beneficial effect of adopting the above-mentioned further technical solution is that the nozzle and the branch pipe are connected by threads, which facilitates the installation and maintenance of the nozzle.

[0060] Furthermore, the nozzle 4 is made of 304 stainless steel.

[0061] The beneficial effects of adopting the above-mentioned further technical solution are: the nozzle is made of 304 stainless steel, which improves the nozzle's corrosion resistance and extends its service life.

[0062] The nozzle is made of 304 stainless steel, with a nominal diameter of DN25, a nominal pressure of 2.0MPa, and an outlet water pressure of 0.5MPa(g). The nozzle is connected to the pipe (branch pipe) using NPT external thread (National Pipe Thread, 60-degree tapered pipe thread). The spray end has a pigtail-shaped turbulence structure, which can atomize and distribute the water flow, effectively preventing filter clogging.

[0063] The closed decoking and dewatering equipment uses overflow to achieve preliminary coke-water separation. An overflow water outlet is set at an appropriate height around the equipment, where a filter screen is installed. A flange is set on the outside of the equipment (overflow equipment) to connect to the delayed coking closed decoking overflow anti-clogging backwashing device of this utility model. The external flushing water is connected to the flushing water flange (the flange on the flushing water pipe).

[0064] During operation, coke and water fall into the dewatering equipment simultaneously. As the water level rises, water flows out from the overflow port. Due to the turbulence of the water, coke particles are agitated and suspended in the water. Some coke particles will reach the overflow port with the water flow. If the particles are smaller than the mesh, the coke will pass through the filter screen and flow out with the water flow. If the particle size is larger than the mesh, it will be blocked by the filter screen. Due to the pressure of the water flow, the coke particles will embed into the mesh. Over time, more and more meshes will become blocked. At this time, the flushing water valve can be opened, and the flushing water enters the nozzle and is sprayed evenly onto the filter screen to wash away the coke particles blocking the mesh, ensuring that the overflow water can flow out normally.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A delayed coking closed decoking overflow anti-clogging backwashing device, characterized in that, include: The system includes a tee, a flushing water pipe, multiple branch pipes, and multiple nozzles. The flushing water pipe is installed in the tee, and each of the multiple branch pipes is connected to one end of the flushing water pipe. Each of the multiple nozzles is installed one-to-one on the free end of each of the multiple branch pipes.

2. The delayed coking closed decoking overflow anti-clogging backwashing device according to claim 1, characterized in that, Both the first and second ends of the tee are equipped with flanges. The first end of the tee is connected to the flange of the overflow device through the flange. The second end of the tee is connected to a flange cover through the flange. One end of the flushing water pipe passes through the flange cover and is connected to multiple branch pipes.

3. The delayed coking closed decoking overflow anti-clogging backwashing device according to claim 2, characterized in that, The flange cover has an opening, the flushing water pipe is installed in the opening, and the flushing water pipe is welded to the flange cover.

4. The delayed coking closed decoking overflow anti-clogging backwashing device according to claim 1, characterized in that, The other end of the flushing water pipe is connected to external flushing water, and a flushing water valve is installed on the flushing water pipe.

5. The delayed coking closed decoking overflow anti-clogging backwashing device according to claim 1, characterized in that, The tee is an equal diameter tee.

6. The delayed coking closed decoking overflow anti-clogging backwashing device according to claim 1, characterized in that, The number of branch pipes is four, the branch pipes are bent pipes, one end of the flushing water pipe is equipped with a blocking plate, and the four branch pipes are arranged around the blocking plate.

7. The delayed coking closed decoking overflow anti-clogging backwashing device according to claim 1, characterized in that, The nozzle has a pigtail-shaped turbulence structure.

8. The delayed coking closed decoking overflow anti-clogging backwashing device according to claim 1, characterized in that, The multiple nozzles are located near the filter screen of the overflow device.

9. The delayed coking closed decoking overflow anti-clogging backwashing device according to claim 1, characterized in that, The multiple nozzles are threadedly installed one-to-one on the free ends of the multiple branch pipes.

10. The delayed coking closed decoking overflow anti-clogging backwashing device according to claim 1, characterized in that, The nozzle is made of 304 stainless steel.

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