CN111530211A

CN111530211A - Multi-stage centrifuge

Info

Publication number: CN111530211A
Application number: CN202010410455.6A
Authority: CN
Inventors: 丁佐华
Original assignee: Hangzhou Yuhang Special Blower Co ltd
Current assignee: Hangzhou Yuhang Special Blower Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-08-14

Abstract

The invention discloses a multistage centrifuge, which comprises a shell, wherein the shell is divided into an upper shell and a lower shell, a demister is arranged in the upper shell, a wire mesh filter is arranged in the lower shell, the wire mesh filter is of a V-shaped structure, the included angle of the V shape is 90-120 degrees, an air inlet is arranged at one side of the lower shell, an oil outlet is arranged at the bottom of the lower shell, and a throttle valve is arranged at the air inlet. The invention has the beneficial effects that: 1. through setting up wire mesh filter and demister, can filter the flue gas of transmission, purify the gas, 2, wire mesh filter and demister set up the installation according to inclination, and the oil collecting tank is retrieved to the fluid and the impurity after being convenient for filter, 3, set up the choke valve in air inlet department, can adjust the velocity of flow of filtering the flue gas, increase filtration efficiency, simultaneously, the velocity of flow can control atmospheric pressure, protection internal arrangement.

Description

Multi-stage centrifuge

Technical Field

The invention belongs to the field of centrifuges, and particularly relates to a multi-stage centrifuge.

Background

The international organization for standardization (ISO) defines atmospheric pollution as "atmospheric pollution" which generally refers to the phenomenon of a substance entering the atmosphere, exhibiting a sufficient concentration, for a sufficient time, due to human activities and natural processes, and thus jeopardizing the comfort, health and welfare of the human body or the environment. "

The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; along with the promotion of the industrialization process of China, the air inflation and propulsion of wind tunnel wind sources and hovercraft, the industrial industry is developing energy conservation and consumption reduction greatly, the industry is upgraded and integrated and recombined, and industrial basic equipment needs to be updated in large quantity. The centrifugal fan is used as an important industrial matched device and is more applied to the fields of electric power, cement, petrochemical industry, coal, mines, environmental protection and the like.

Centrifugal fan need carry out filtration purification to the flue gas at the in-process of discharging fume for the flue gas that discharges can not air pollution, and current centrifugal fan does not carry out gas cleaning mostly and handles, perhaps the not good scheduling problem of treatment effect.

The oil-gas-water three-phase hypergravity separator with the publication number of CN102794033A comprises a shell, one or more spiral-flow type hypergravity gas-liquid separators, one or more spiral-flow type hypergravity oil-water separators, a group of water return pipes, a group of oil return pipes, an oil-water interface controller and an electromagnetic valve; the shell is sequentially divided into a water collecting cavity, an oil-water cavity and an oil collecting cavity from bottom to top by a lower partition plate and an upper partition plate, the gas-liquid separator is inserted from the top of the shell, passes through the oil collecting cavity and is not communicated with the oil collecting cavity, an inlet pipe and an exhaust port of the gas-liquid separator are positioned outside the shell, and a liquid discharge port is communicated with the oil-water cavity; the oil-water separator is arranged in the oil-water cavity, an oil-water inlet of the oil-water separator is communicated with the oil-water cavity, an oil discharge port is communicated with the oil collection cavity, and a water discharge port is communicated with the water collection cavity; the oil collecting cavity is communicated with the water collecting cavity through a water return pipe and an oil return pipe; the oil-water interface controller and the electromagnetic valve control the water discharge. The invention solves the problems of large volume and large occupied area of the existing three-phase separator, does not solve the problem of low efficiency of oil-gas separation and purification in flue gas emission, does not adjust the flow velocity in the separation process, and is easy to cause internal equipment loss due to large pressure drop.

In view of the above technical problems, the present invention provides a multistage centrifuge.

Disclosure of Invention

In order to solve the problems of poor filtering and purifying effect and incapability of adjusting the flow rate in the prior art, the invention discloses a multistage centrifuge, which can filter and purify transmitted flue gas by arranging a screen filter and a demister, wherein the screen filter and the demister are arranged according to an inclined angle, so that the filtered oil and impurities can be conveniently recovered to an oil collecting tank, a throttle valve is arranged at an air inlet, the flow rate of the filtered flue gas can be adjusted, the filtering efficiency is increased, and meanwhile, the air pressure can be controlled by adjusting the flow rate, and an internal device is protected.

The technical scheme for solving the technical problem is as follows: the utility model provides a multistage centrifuge, includes the casing, the casing divide into casing and lower casing, goes up the casing and passes through bolt and nut with lower casing and be connected, goes up the casing and is equipped with the backup pad down between the casing, be provided with the demister in the upper casing, through bolted connection in the backup pad, the internal silk screen filter that is provided with of inferior valve, silk screen filter is "V" style of calligraphy structure, and the contained angle of "V" type is 90-120, one side of casing is equipped with the air inlet down, and the bottom is equipped with the oil drain, air inlet department installation choke valve, the oil drain lower extreme is connected with the sump oil tank, it is equipped with the honeycomb duct and extends to the oil drain to go up.

Preferably, in the technical scheme disclosed by the invention, the demister comprises structured packing, a partition plate and wire mesh cloth, the structured packing is connected with the partition plate at intervals, and the wire mesh cloth is arranged between the structured packing and the partition plate.

Preferably, in the technical scheme disclosed by the invention, the structured packing and the partition plate are obliquely arranged, the inclination angle is 15-18 degrees, the flue gas rises from bottom to top in the filtering process, the contact rate of the flue gas and the structured packing can be increased by obliquely arranging the structured packing and the partition plate, the filtering and purifying effect is increased, and the contact rate can be increased to the greatest extent by obliquely arranging the angle between the structured packing and the partition plate at 15-18 degrees on the premise of not influencing the passing of the flue gas.

Preferably, in the technical scheme disclosed by the invention, the triangular fixing frames are arranged on two sides of the demister and are connected to the supporting plate through bolts and nuts, smoke has large pressure drop, the smoke can impact the demister when passing through the demister, and the stability of the demister can be improved by arranging the triangular fixing frames.

Preferably, in the technical scheme disclosed by the invention, the silk screen cloth is glass fiber woven by medium-alkali or alkali-free glass fiber yarn and coated by alkali-resistant high-molecular emulsion.

Preferably, in the technical scheme disclosed by the invention, the wire mesh filter is a metal rubber filter screen, the wire mesh filter is provided with 3-5 layers, the large-hole mesh screen is arranged on the outer side, the small-hole mesh screen is arranged on the inner side, the wire mesh filter is provided with 3-5 layers, the large-hole mesh screen on the outer side can filter out large-particle impurities, the large-particle impurities are prevented from entering the small-hole mesh screen to cause blockage, meanwhile, the large-hole mesh screen plays a role in framework support and protection, and due to the pressure difference factor, one layer of screen is easily broken by washing.

Preferably, in the technical scheme disclosed by the invention, the strip-shaped sealing rubber gasket is arranged between the bolt and the nut, and by adopting the technical scheme, the leakage of flue gas in the flue gas transmission and purification process can be avoided, and the air tightness is improved.

Preferably, in the technical solution disclosed in the present invention, an oil drip hole for supplying oil to drip is provided at a connection position of the support plate and the draft tube.

The invention has the beneficial effects that: 1. through setting up wire mesh filter and demister, can filter the flue gas of transmission, purify the gas, 2, wire mesh filter and demister set up the installation according to inclination, and the oil collecting tank is retrieved to the fluid and the impurity after being convenient for filter, 3, set up the choke valve in air inlet department, can adjust the velocity of flow of filtering the flue gas, increase filtration efficiency, simultaneously, the velocity of flow can control atmospheric pressure, protection internal arrangement.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the bolt and nut connection;

fig. 3 is a partially enlarged view of the demister.

Wherein, the corresponding relation between the reference signs and the component names is as follows: 1-shell, 101-upper shell, 102-lower shell, 103-support plate, 2-demister, 201-structured packing, 202-partition plate, 203-silk screen cloth, 3-silk screen filter, 4-air inlet, 5-oil outlet, 6-throttle valve, 7-oil collecting tank, 8-guide pipe, 9-triangular fixing frame, 10-bolt nut, 11-oil drip hole, 1001-sealing rubber gasket, 1002-bolt and 1003-nut.

Detailed Description

The present invention is described in further detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

The invention discloses a multistage centrifuge, which comprises a shell 1, wherein the shell 1 is divided into an upper shell 101 and a lower shell 102, the upper shell 101 is connected with the lower shell 102 through bolts and nuts 10, a support plate 103 is arranged between the upper shell 101 and the lower shell 102, the support plate 103 is used for installing and fixing a demister 2, the upper shell 101 is internally provided with the demister 2 which is connected with the support plate 103 through bolts and nuts 10, the demister 2 is used for further filtering and purifying smoke passing through a screen filter 3 so that the transmitted smoke reaches the emission standard, the lower shell 102 is internally provided with a screen filter 3, the screen filter 3 is in a V-shaped structure, the V-shaped included angle is 90-120 degrees, the screen filter 3 preliminarily filters the smoke transmitted by a fan to filter large oil gas and impurities carried in the smoke, and the screen filter 3 in the V-shaped structure with the included angle of 90-120 degrees is arranged, in being convenient for filter the oil collecting tank 7 that drips to the large granule oil gas and impurity on the silk screen in the contained angle department, through the concentration point drippage, effectively prevent to filter the oil gas that filters in the flue gas that the in-process mixes into once more of drippage, one side of casing 102 is equipped with air inlet 4 down, and the bottom is equipped with oil drain port 5, and air inlet 4 is used for the centrifuge input to need the purified flue gas, and oil drain port 5 is used for the oil gas impurity after filtering to drip oil collecting tank 7 through dripping, 4 installation choke valves 6 of air inlet, choke valve 6 are used for adjusting the velocity of flow of the flue gas of 4 inputs of air inlet, and the size of adjusting the velocity of flow can improve the effect of filtration purification, and the atmospheric pressure of flue gas can be controlled to the size of adjusting the velocity of flow simultaneously, 5 lower extremes of oil drain port are.

In this embodiment, the flue gas passes through centrifuge and gets into the transmission from air inlet 4, the flue gas rises, silk screen filter 3 filters the flue gas, filter oil gas and large granule impurity in the flue gas, the oil gas that filters condenses into big oil drop at the silk screen, drip to oil collecting tank 7 through the action of gravity, the flue gas after the filtration continues to rise through demister 2, purify once more, absorb the small granule oil gas in the flue gas, oil gas liquid drop after condensing drips, retrieve oil collecting tank 7, the gaseous discharge after the clean purification, purify through multi-stage filtration, can make the clean gas of emission.

The flue gas velocity of flow through demister 2 is too high or low all is unfavorable for the normal operating of demister excessively, and the flue gas velocity of flow is too high easily causes the flue gas secondary to take oil to reduce defogging efficiency, the high systematic resistance of velocity of flow is big simultaneously, and the energy consumption is high. The flow rate through the demister 2 is too low to facilitate gas-liquid separation and also to improve demisting efficiency. In this embodiment, air inlet 4 is provided with choke valve 6, and through the velocity of flow of 6 control flue gases of choke valve, it can increase the filter effect to adjust the flue gas velocity of flow, and the while step-down can reduce the impact that the filtration equipment received. The flow velocity is designed to be between 4 and 6 m/s.

The wire mesh filter 3 is mainly composed of a wire mesh, a wire mesh grid, a wire mesh block and a supporting device for fixing the wire mesh block. When the flue gas rises through the wire mesh filter 3 at a certain speed, the oil gas collides with the fine wires of the wire mesh filter 3 and is attached to the surfaces of the fine wires due to the inertia effect of the rising oil gas. The oil gas on the surface of the filament is diffused and settled by the gravity of the oil gas, so that the oil gas forms larger liquid drops to flow to the lower end of the V point along the wire mesh filter 3, oil drops are larger and larger, and the oil drops separate and fall down until the gathered oil drops are larger to the extent that the gravity generated by the oil drops exceeds the resultant force of the rising force of the gas and the surface tension of the liquid. The structure is simple, the volume is small, the filtering efficiency is high, the resistance is small, the weight is light, the installation, the operation and the maintenance are convenient, and the collection efficiency of the screen filter 3 reaches 98-99.8% for mist with the particle size being more than or equal to 3-5 um.

Preferably, in the technical scheme disclosed by the present invention, the demister 2 comprises a structured packing 201, a partition plate 202, and a wire mesh cloth 203, the structured packing 201 and the partition plate 202 are connected at intervals, and the wire mesh cloth 203 is arranged between the structured packing 201 and the partition plate 202. The silk screen cloth 203 is glass fiber woven by medium-alkali or alkali-free glass fiber yarn and coated by alkali-resistant polymer emulsion. Wire mesh cloth 203 series products: alkali-resistant GRC glass fiber mesh cloth, alkali-resistant wall special mesh and stone mesh cloth, marble back-pasted mesh cloth. Mesh size of wire mesh cloth 203: 8 mm. times.8 mm, 10 mm. times.10 mm, 12 mm. times.12 mm.

Preferably, in the technical scheme disclosed by the invention, the structured packing 201 and the partition plate 203 are obliquely arranged, the inclination angle is 15-18 degrees, the flue gas rises from bottom to top in the filtering process, the contact rate of the flue gas and the structured packing 201 can be increased by obliquely arranging the structured packing 201 and the partition plate 202, the filtering and purifying effect is increased, and the contact rate can be increased to the greatest extent by setting the angle to be 15-18 degrees on the premise of not influencing the passing of the flue gas.

Preferably, in the technical scheme disclosed by the invention, the triangular fixing frames 9 are arranged on two sides of the demister 2 and are connected to the supporting plate 103 through bolts and nuts 10, smoke has large pressure drop, the smoke can impact the demister 2 when passing through the demister 2, and the triangular fixing frames 9 can increase the stability of the demister 2.

Preferably, in the technical scheme disclosed by the invention, the wire mesh filter 3 is a metal rubber filter screen, the wire mesh filter 3 is provided with 3-5 layers, a large-mesh wire mesh is arranged on the outer side, and a small-mesh wire mesh is arranged on the inner side. The metal rubber filter screen is made of stainless steel wires. The raw material is stainless steel wire, does not contain any natural rubber, but has a capillary loose structure, and is particularly suitable for filtering gas and liquid under the environments of high and low temperature, large temperature difference, high pressure, high vacuum, strong radiation, severe vibration, corrosion and the like. The metal rubber filter screen has the characteristics of metal, corrosion resistance, high strength and impact resistance. Meanwhile, the metal rubber filter screen can adjust the filtering precision of the filter screen by adopting the thickness of the wires, the density of the metal rubber and the thickness of the filter screen. When the cleaning agent is used for cleaning, the original density is easy to recover, and the cleaning is convenient. The screen filter 3 sets up 3-5 layers, and the big pore mesh silk screen in the outside can filter large granule impurity, avoids large granule impurity to enter into the small pore mesh silk screen, causes the jam, and simultaneously, big pore mesh silk screen plays skeleton support guard action, and owing to pressure differential factor, the easy quilt of one deck silk screen is broken down.

Preferably, in the technical scheme disclosed by the invention, the strip-shaped sealing rubber gasket 1001 is arranged between the bolt and the nut 10, and by adopting the technical scheme, the leakage of flue gas in the flue gas transmission and purification process can be avoided, and the air tightness is improved.

Preferably, in the technical solution disclosed in the present invention, an oil drip hole 11 for supplying oil to drip is disposed at a connection position of the support plate 103 and the flow guide tube 8, and the oil drip hole 11 facilitates oil droplets on the demister 2 to drip into the flow guide tube 8 and be recovered to the oil collection tank 7.

Preferably, in the technical scheme disclosed by the invention, the oil collecting tank 7 is detachably connected with the oil discharge port 5, and the detachable connection facilitates installation and removal of the oil collecting tank 7.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.

Claims

1. The multistage centrifuge is characterized by comprising a shell (1), wherein the shell (1) is divided into an upper shell (101) and a lower shell (102), the upper shell (101) is connected with the lower shell (102) through a bolt and a nut (10), a support plate (103) is arranged between the upper shell (101) and the lower shell (102), a foam remover (2) is arranged in the upper shell (101) and connected to the support plate (103) through the bolt and the nut (10), a wire mesh filter (3) is arranged in the lower shell (102), the wire mesh filter (3) is of a V-shaped structure, the included angle of the V shape is 90-120 degrees, an air inlet (4) is arranged on one side of the lower shell (102), an oil discharge port (5) is arranged at the bottom of the lower shell, a throttle valve (6) is arranged at the air inlet (4), and an oil collection tank (7) is connected to the lower end of the oil discharge, and a guide pipe (8) is arranged on one side of the upper shell (101) and extends to the oil outlet (5).

2. The multistage centrifuge according to claim 1, wherein the demister (2) comprises a structured packing (201), a baffle (202) and a wire mesh cloth (203), the structured packing (201) is connected with the baffle (202) at intervals, and the wire mesh cloth (203) is arranged between the structured packing (201) and the baffle (202).

3. The multistage centrifuge according to claim 2, characterised in that the structured packing (201) is arranged obliquely to the baffle (202) at an angle of 15 ° -18 °.

4. The multistage centrifuge according to claim 1, characterized in that the demister (2) is provided with a triangular mounting (9) on both sides, connected to a support plate (103) by means of a bolt and nut (10).

5. The multistage centrifuge according to claim 2, wherein the wire mesh cloth (203) is glass fiber woven from medium-alkali or alkali-free glass fiber yarn, coated with alkali-resistant polymer emulsion.

6. The multistage centrifuge according to claim 1, wherein the wire mesh filter (3) is a metal rubber filter mesh, the wire mesh filter (3) being arranged in 3-5 layers, a large mesh wire mesh being arranged on the outside and a small mesh wire mesh being arranged on the inside.

7. Multistage centrifuge according to claim 1, characterized in that a band-shaped sealing gasket (1001) is arranged between the bolt and nut (10).

8. The multistage centrifuge according to claim 1, wherein the connection between the support plate (103) and the flow guide tube (8) is provided with oil dripping holes (11) for oil dripping.