CN118681709A - Cyclone separator series-parallel coupling system capable of adjusting flow distribution - Google Patents
Cyclone separator series-parallel coupling system capable of adjusting flow distribution Download PDFInfo
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- CN118681709A CN118681709A CN202410854172.9A CN202410854172A CN118681709A CN 118681709 A CN118681709 A CN 118681709A CN 202410854172 A CN202410854172 A CN 202410854172A CN 118681709 A CN118681709 A CN 118681709A
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- 238000009826 distribution Methods 0.000 title claims abstract description 77
- 230000008878 coupling Effects 0.000 title claims abstract description 17
- 238000010168 coupling process Methods 0.000 title claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 17
- 238000000926 separation method Methods 0.000 claims abstract description 84
- 239000000843 powder Substances 0.000 claims description 9
- 238000005265 energy consumption Methods 0.000 abstract description 17
- 239000007787 solid Substances 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 9
- 239000000428 dust Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The invention belongs to the field of gas-solid separation devices, and particularly relates to a cyclone separator series-parallel coupling system capable of adjusting flow distribution, which comprises a plurality of stages of separation devices, wherein the separation devices are connected in series stage by stage, a gas distribution system is arranged between any two adjacent stages of separation devices, the bottom of the gas distribution system is provided with a plurality of gas inlets, the top of the gas distribution system is provided with a plurality of gas outlets, each stage of separation device is formed by connecting a plurality of cyclone separators in parallel, and the number of the cyclone separators in each stage of separation device is sequentially reduced along with the increase of the stages; the exhaust pipes of the cyclone separators in the same-stage separation device are all connected with the air inlets of the same air distribution system, and the air outlets of the air distribution system are all connected with the air inlets of the cyclone separators in the previous-stage separation device. The cyclone separator is gradually reduced along with the higher stage number of the separation device, which means the reduction of energy consumption, and the flow is optimized, the local resistance is reduced, the energy consumption is reduced, the cost is reduced, and the separation efficiency is improved by combining a cylindrical gas distribution system and a connection mode.
Description
Technical Field
The invention belongs to the field of gas-solid separation devices, and particularly relates to a cyclone separator series-parallel coupling system capable of adjusting flow distribution.
Background
The cyclone separator is a gas-solid separation device capable of continuously running under the conditions of high temperature, high pressure and high particle concentration, is widely applied to various industries such as chemical industry, oil refining, metallurgy, building materials, environmental protection and the like, and is a key device for recovering powder products in the technical processes such as petroleum catalytic cracking, circulating fluidized bed boiler, chemical product granulation drying and the like. In the field of environmental protection, dust emission indexes are improved year by year; in the fields of oil refining and chemical industry, the aim of reducing the production cost is to have higher requirements on the powder recovery capacity. In this case, a single cyclone cannot meet the requirements, and a plurality of cyclones are generally connected in series to achieve higher separation efficiency.
Currently, the most common serial form is that each separator is used as a stage, and the outlet of the separator at the upper stage is connected to the inlet of the separator at the lower stage (hereinafter referred to as a "1+1" serial structure). The dust-containing gas sequentially flows through the separators of each stage to realize purification. The gas flow through each separator is exactly the same. Considering that the gas flow flowing through each separator in the second stage contains less dust and has smaller dust particle size due to the purification effect of the first stage separation system, the difficulty of capturing particles by the second stage separation system is increased, the second stage often uses higher pressure drop, namely energy consumption, and the performance of a single separator is improved, and the 1+1 series structure has high energy consumption and high cost and does not meet the aim of double carbon. In 1996, mcCallion proposed a new design idea: the first stage of the series system still adopts one separator, the second stage is composed of two separators side by side, and half of the gas flow is respectively born (hereinafter referred to as a 1+2 series structure). The core idea of the design scheme is to obtain a stronger centrifugal force field by reducing the diameter of the second-stage separator so as to improve the separation efficiency. However, the design guiding thought is the same as the common series structure of 1+1, only the problem of high separation difficulty of the second separation system is still seen, the conventional method is adopted for coping, the performance is not remarkably improved, and the separation efficiency is difficult to improve.
Disclosure of Invention
The invention aims to provide a cyclone separator series-parallel coupling system capable of adjusting flow distribution, which solves the problems of high energy consumption, high cost and difficult separation efficiency improvement of the existing separator series structure.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The cyclone separator series-parallel coupling system comprises a plurality of stages of separating devices, wherein the separating devices are serially connected in a step-by-step manner, a gas distribution system is arranged between any two adjacent stages of separating devices, the bottom of the gas distribution system is provided with a plurality of gas inlets, the top of the gas distribution system is provided with a plurality of gas outlets, each stage of separating device is formed by connecting a plurality of cyclone separators in parallel, the number of the cyclone separators in each stage of separating device is sequentially reduced along with the increase of the number of the stages, and the number of the cyclone separators which are progressively reduced is different along with the type of powder; the exhaust pipes of the cyclone separators in the same-level separation device are connected with the air inlets of the same air distribution system, the air outlets of the air distribution system are connected with the air inlets of the cyclone separators in the next-level separation device, and the air distribution system collects the purified air flowing out of each cyclone separator in the bottom separation device and distributes the purified air to each cyclone separator in the top separation device of the air distribution system.
Preferably, the number of cyclone separators in the n+1 separation device is reduced by one third compared with the number of cyclone separators in the n separation device.
Preferably, the air distribution system is cylindrical, the air inlets at the bottom and the air outlets at the top are rectangular and are tangent to the cylinder, the air inlets of the air distribution system are connected with the exhaust pipe of the cyclone separator in the n-th separation device in a one-to-one mode, and the air outlets of the air distribution system are connected with the air inlet pipe of the cyclone separator in the n+1-th separation device in a one-to-one mode in a tangent mode.
Preferably, the air distribution system is in a ring pipe shape, the pipes are bent and connected end to end, the air inlets at the bottom and the air outlets at the top are cuboid and tangent to the cylinder, the air inlets of the air distribution system are connected with the exhaust circular pipes of the cyclone separator in the n-th separation device in a one-to-one mode, and the air outlets of the air distribution system are connected with the air inlet pipes of the cyclone separator in the n+1-th separation device in a one-to-one mode in a tangent mode.
Preferably, the tube is one of a circular tube or a square tube.
Because the purified gas flowing out of each cyclone separator is in a rotating state, the gas distribution system maintains the rotating flow state of the purified gas, so that the energy consumption can be reduced, and the separation efficiency can be improved.
Preferably, the cyclone separator is any one of a tangential flow back-rotation type or a direct flow type.
Preferably, the tangential flow back-turning cyclone separator comprises an air inlet pipe, an air outlet pipe, a cylinder body, a cone, an expansion bin and a discharge pipe, wherein the main structure is in concentric arrangement up and down in a cylinder and cone, the air inlet pipe and the air outlet pipe are arranged at the top end, and the discharge pipe of powder is arranged at the bottom end.
Preferably, the main structure of the direct-current cyclone separator is a cylinder, the gas inlet is arranged at the top end, and the gas and powder outlets are arranged at the bottom end.
Compared with the prior art, the invention has the beneficial effects that:
(1) The number of the cyclone separators in each stage of separation device is reduced along with the increase of the stage number, so that the gas flow rate flowing through each cyclone separator is increased, and the gas inlet pipe of each cyclone separator in the separation device with higher stage number has higher gas speed under the condition that the inlet areas of the cyclone separators are the same, thereby improving the efficiency; the number of cyclone separators is reduced, energy consumption links are reduced, and the total energy consumption of the series-parallel system is reduced;
(2) The air flow is in a strong rotational flow state in the exhaust pipe of the cyclone separator, the kinetic energy is relatively large, and the kinetic energy of the air flow can be effectively reserved in a tangential connection mode of the air inlet of the air distribution system and the exhaust pipe, so that the air flow is guided into the air distribution system with lower energy consumption. The method comprises the steps of adopting a cylindrical or annular air distribution system to guide air flow to rotate again, arranging tangential inlets according to the rotation direction of the air flow, enabling kinetic energy of multiple air flows to be overlapped with each other, generating a centrifugal force field in the air distribution system, concentrating particles to be trapped to a side wall under the centrifugal action, enabling an air outlet of the air distribution system to be tangent to the cylinder, and on one hand, introducing the kinetic energy of the air in the air distribution system to the next stage with lower energy consumption; on the other hand, the effect of particle concentration is transferred to the next cyclone separator, the dust concentration of the airflow is increased, the efficiency of the next cyclone separator is improved, the energy dissipation of the airflow caused by turbulent flow in the collecting and redistributing processes is reduced, and the separation efficiency is improved while the total energy consumption of the system is reduced.
Drawings
FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a schematic structural diagram of embodiment 2 of the present invention;
fig. 3 is a schematic view showing the structure of the cyclone separator according to the embodiment 1 and embodiment 2 of the present invention.
Reference numerals illustrate: 1. a first separation device; 2. a gas distribution system; 21. an air inlet; 22. an air outlet; 3. a cyclone separator; 31. an air inlet pipe; 32. an exhaust pipe; 33. a cylinder; 34. a cone; 35. an expansion bin; 36. a discharge pipe; 4. and a second separating device.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
The following examples are directed to a system of a mixture of fine silica powder and air, the dust concentration of the gas stream being 10g/m 3.
Example 1
As shown in fig. 1 and 3, a cyclone separator series-parallel coupling system capable of adjusting flow distribution comprises a 2-stage separation device, which is a first-stage separation device 1 and a second-stage separation device 4, wherein the first-stage separation device 1 is a first-stage separation device, the second-stage separation device 4 is a second-stage separation device, the first-stage separation device 1 and the second-stage separation device 4 are connected in series, a gas distribution system 2 is arranged between the first-stage separation device 1 and the second-stage separation device 4, the gas distribution system 2 is cylindrical, the diameter is 700mm, the height is 800mm, 3 gas inlets 21 are arranged at the bottom of the gas distribution system 2, 2 gas outlets 22 are arranged at the top, the gas inlets 21 and the gas outlets 22 are rectangular and are tangent to the cylinder, the sizes of the gas inlets 21 and the gas outlets 22 are 237mm×76mm, the first-stage separation device 1 is formed by connecting 3 cyclone separators 3 in parallel, the second separation device 4 is formed by connecting 2 cyclone separators 3 in parallel, wherein the cyclone separators 3 comprise an air inlet pipe 31, an air outlet pipe 32, a cylinder 33, a cone 34, an expansion bin 35 and a discharge pipe 36, the air outlet pipe 32, the cylinder 33, the cone 34, the expansion bin 35 and the discharge pipe 36 are coaxially arranged from top to bottom in sequence, the expansion bin 24 is cylindrical, the cone shape is arranged below, the diameter of the cylinder 33 is 300mm, the diameter of the air outlet pipe 32 is 135mm, the length of the air outlet pipe 32 inserted into the cylinder 33 is 182.6mm, the diameter of the small end of the cone 34 is 120mm, the height of the cylinder 33 is 546mm, the height of the cone 34 is 540mm, the diameter of the cylinder of the expansion bin 35 is 210mm, the height of the cylinder of the expansion bin 35 is 333mm, the cone height of the expansion bin 35 is 233mm, the diameter of the discharge pipe 36 is 70mm, and the length of the discharge pipe 36 is 667mm; the exhaust pipes 32 of the 3 cyclone separators 3 in the first-stage separation device are connected with the air inlets 21 of the air distribution system 2 in a one-to-one tangential manner, the air outlets 22 of the air distribution system 2 are connected with the air inlets 31 of the 2 cyclone separators 3 in the second-stage separation device in a one-to-one tangential manner, and the air distribution system 2 collects purified air flowing out of each cyclone separator in the first-stage separation device and distributes the purified air to each cyclone separator in the top separation device of the air distribution system 2; the number of cyclone separators of the second separation device is reduced, energy consumption links are reduced, and the total energy consumption of the series-parallel system is reduced; the cylinder gas distribution system is adopted, the exhaust pipes of the cyclone separators are all connected with the gas inlet of the gas distribution system in a tangential mode, the gas outlet of the gas distribution system is connected with the gas inlet pipe of the cyclone separator in the second-stage separation device in a tangential mode, the tangential inlets are arranged in a rotating direction according to the gas flow, the kinetic energy of the gas in the gas distribution system is introduced into the next stage with lower energy consumption, the flow is optimized, the local resistance is reduced, the particle concentration effect is also transferred to the cyclone separator of the next stage, the dust concentration of the gas flow is increased, the efficiency of the cyclone separator of the next stage is improved, and the energy dissipation caused by turbulent flow in the collecting and redistributing process of the gas flow is reduced.
Example 2
As shown in fig. 2 and 3, a cyclone separator series-parallel coupling system capable of adjusting flow distribution comprises a 2-stage separation device, which is a first-stage separation device 1 and a second-stage separation device 4, wherein the first-stage separation device 1 is a first-stage separation device, the second-stage separation device 4 is a second-stage separation device, the first-stage separation device 1 and the second-stage separation device 4 are connected in series, a gas distribution system 2 is arranged between the first-stage separation device 1 and the second-stage separation device 4, the gas distribution system 2 is in a ring pipe shape, the diameter of a ring is 700mm, 3 gas inlets 21 and 2 gas outlets 22 are arranged on the outer side wall of the gas distribution system 2, the gas inlets 21 and the gas outlets 22 are rectangular and are tangent to the outer side of the ring pipe, the sizes of the gas inlets 21 and the gas outlets 22 are 237mm multiplied by 76mm, the first-stage separation device 1 is formed by connecting 3 cyclone separators 3 in parallel, the second separation device 4 is formed by connecting 2 cyclone separators 3 in parallel, wherein the cyclone separators 3 comprise an air inlet pipe 31, an air outlet pipe 32, a cylinder 33, a cone 34, an expansion bin 35 and a discharge pipe 36, the air outlet pipe 32, the cylinder 33, the cone 34, the expansion bin 35 and the discharge pipe 36 are coaxially arranged from top to bottom in sequence, the expansion bin 24 is cylindrical, the cone shape is arranged below, the diameter of the cylinder 33 is 300mm, the diameter of the air outlet pipe 32 is 135mm, the length of the air outlet pipe 32 inserted into the cylinder 33 is 182.6mm, the diameter of the small end of the cone 34 is 120mm, the height of the cylinder 33 is 546mm, the height of the cone 34 is 540mm, the diameter of the cylinder of the expansion bin 35 is 210mm, the height of the cylinder of the expansion bin 35 is 333mm, the cone height of the expansion bin 35 is 233mm, the diameter of the discharge pipe 36 is 70mm, and the length of the discharge pipe 36 is 667mm; the exhaust pipes 32 of the 3 cyclone separators 3 in the first-stage separation device are connected with the air inlets 21 of the air distribution system 2 in a one-to-one tangential manner, the air outlets 22 of the air distribution system 2 are connected with the air inlets 31 of the 2 cyclone separators 3 in the second-stage separation device in a one-to-one tangential manner, and the air distribution system 2 collects purified air flowing out of each cyclone separator in the first-stage separation device and distributes the purified air to each cyclone separator in the top separation device of the air distribution system 2; the number of cyclone separators of the second separation device is reduced, energy consumption links are reduced, and the total energy consumption of the series-parallel system is reduced; the annular gas distribution system is adopted, the exhaust pipes of the cyclone separators of the first-stage separation device are all connected with the gas inlet of the gas distribution system in a tangential mode, the gas outlets of the gas distribution system are all connected with the gas inlet pipes of the cyclone separators of the second-stage separation device in a tangential mode, the tangential inlets are arranged in a spiral direction according to the gas flow, the kinetic energy of the gas in the gas distribution system is introduced into the next stage with lower energy consumption, the flow is optimized, the local resistance is reduced, the particle concentration effect is also transferred to the cyclone separators of the next stage, the dust concentration of the gas flow is increased, the efficiency of the cyclone separators of the next stage is improved, and the energy dissipation caused by turbulent flow in the collecting and redistribution process of the gas flow is reduced.
The two embodiments establish a series-parallel coupling system of the '3+2' cyclone separators, compared with 3 groups of the conventional '1+1' series systems which are arranged side by side and the cyclone separators adopt the size, the inlet air speed of the first-stage separator is set to be 22m/s, and numerical simulation results show that compared with the conventional structure, the system reduces the particle loss rate by 25% and reduces the air flow energy loss (pressure drop) by 25%. Compared with a '1+2' series system, the energy loss (pressure drop) of the two air flows is equivalent, and the particle loss rate is reduced by 20% by the system.
Claims (8)
1. The cyclone separator series-parallel coupling system capable of adjusting flow distribution is characterized by comprising a plurality of stages of separating devices, wherein the separating devices are serially connected in a step-by-step manner, a gas distribution system is arranged between any two adjacent stages of separating devices, the bottom of the gas distribution system is provided with a plurality of gas inlets, the top of the gas distribution system is provided with a plurality of gas outlets, each stage of separating device is formed by connecting a plurality of cyclone separators in parallel, the number of the cyclone separators in each stage of separating devices is sequentially reduced along with the increase of the stage number, and the number of the cyclone separators which are progressively reduced is different along with the powder types; the exhaust pipes of the cyclone separators in the same-level separation device are connected with the air inlets of the same air distribution system, the air outlets of the air distribution system are connected with the air inlets of the cyclone separators in the previous-level separation device, and the air distribution system collects purified air flowing out of each cyclone separator in the bottom separation device and distributes the purified air to each cyclone separator in the top separation device of the air distribution system.
2. The adjustable flow distribution cyclone series-parallel coupling system of claim 1 wherein the number of cyclone separators in the n+1 separation device is reduced by one third from the number of cyclone separators in the n separation device.
3. The cyclone separator serial-parallel coupling system with adjustable flow distribution according to claim 1, wherein the air distribution system is cylindrical, the air inlets at the bottom and the air outlets at the top are rectangular and tangent to the cylinder, the air inlets of the air distribution system are connected with the exhaust pipes of the cyclone separators in the n-th separation device in a one-to-one manner, and the air outlets of the air distribution system are connected with the air inlet pipes of the cyclone separators in the n+1-th separation device in a one-to-one manner in a tangent manner.
4. The cyclone separator serial-parallel coupling system with adjustable flow distribution according to claim 1, wherein the air distribution system is in a ring pipe shape, pipe bends are connected end to end, a plurality of air inlets at the bottom and a plurality of air outlets at the top are all cuboid and tangent to a cylinder, a plurality of air inlets of the air distribution system are connected with the air discharge circular pipes of the cyclone separator in the n-th separation device in a one-to-one manner, and a plurality of air outlets of the air distribution system are connected with the air inlet pipes of the cyclone separator in the n+1-th separation device in a one-to-one manner in a tangent manner.
5. The adjustable flow distribution cyclone series-parallel coupling system of claim 4 wherein the tube is one of a circular tube or a square tube.
6. The flow distribution adjustable cyclone series-parallel coupling system as claimed in any one of claims 3 or 4, wherein the cyclone is either a tangential flow back-turning type or a direct flow type.
7. The cyclone separator series-parallel coupling system with adjustable flow distribution according to claim 6, wherein the tangential flow back-turning cyclone separator comprises an air inlet pipe, an air outlet pipe, a cylinder body, a cone body, an expansion bin and a discharge pipe, the main structure is that a cylinder and a cone are arranged concentrically up and down, the air inlet pipe and the air outlet pipe of gas are arranged at the top end, and the discharge pipe of powder is arranged at the bottom end.
8. The flow distribution adjustable cyclone separator series-parallel coupling system as recited in claim 6, wherein the straight cyclone separator body structure is cylindrical with gas inlet at top end and gas and powder outlet at bottom end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410854172.9A CN118681709A (en) | 2024-06-28 | 2024-06-28 | Cyclone separator series-parallel coupling system capable of adjusting flow distribution |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410854172.9A CN118681709A (en) | 2024-06-28 | 2024-06-28 | Cyclone separator series-parallel coupling system capable of adjusting flow distribution |
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| CN118681709A true CN118681709A (en) | 2024-09-24 |
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| CN202410854172.9A Pending CN118681709A (en) | 2024-06-28 | 2024-06-28 | Cyclone separator series-parallel coupling system capable of adjusting flow distribution |
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