Corrugated paper production line dust removal device

Abstract

The utility model relates to a dust removal device for a corrugated paper production line, which effectively solves the problems that dust removal equipment is low in dust removal speed, not ideal in dust removal rate and easy to increase dust-containing gas moisture. According to the technical scheme, the device comprises a spraying box, an evaporation box, a condensation box and a precipitation box, atomization nozzles are arranged on the inner wall of the spraying box, a throttling valve is installed between the spraying box and the evaporation box, a condensation pipe is arranged in the condensation box, the lower end of the condensation pipe is connected with an exhaust pipe and a liquid drainage pipe, and the exhaust pipe upwards extends out of the condensation box from the top of the condensation box. The liquid discharging pipe downwards extends out of the condensing box and then is communicated with the bottom of the settling box, a slag discharging opening is formed in the bottom of the settling box, and an end cover is arranged on the slag discharging opening; the corrugated paper dust removal device can effectively reduce the dust amount in a corrugated paper production line and a production workshop, is higher in dust removal rate and high in dust removal speed, and can dry dust-containing gas.

Description

Technical Field

[0001] The present invention relates to the field of dust collection, and specifically to a dust removal device for a corrugated paper production line. Background Art

[0002] During the production processes such as cutting and grooving of corrugated paper, paper scraps or paper fluff are generated and dispersed in the air, making the environment near the production line and even inside the production workshop poor.

[0003] Currently, the main dust collection and treatment equipment includes bag filters, cartridge filters, and cyclone separators; the first two use a filtration method, and dust will adhere to the surface of the filter bags or cartridges, requiring regular backwashing or disassembly for cleaning. Especially when the dust content is high, the filtration burden on the filter elements is very large, and the cleaning frequency is very high, which will greatly reduce the working effect and the service life of the equipment; the latter uses the method of centrifugal inertia force, and the dust particles are thrown out by the centrifugal force during high-speed rotation, but the dust removal effect is poor, and it can only handle dust particles with larger particle sizes, and has little effect on small particle dust.

[0004] In order to reduce the pressure on the dust treatment equipment, when the dust content is high, some pretreatment equipment has emerged. The dust is first pretreated to reduce the dust content therein, and then subsequent thorough filtration is carried out. This kind of pretreatment equipment is generally divided into two categories:

[0005] One category is to use gravity or inertial force sedimentation. For example, the invention patent with the application number: CN200710037270.X. This kind of equipment has the disadvantages of slow processing speed and low dust removal rate, especially for small particle dust, these disadvantages are particularly obvious;

[0006] The other category is spray dust reduction, which uses water mist to capture dust particles to achieve the dust reduction effect. For example, the utility model patent with the application number: CN202120126222.3, the invention patent with the application number: CN201710226120.7, etc. Since it is difficult for the water mist to completely cover the dust, generally, long-term spraying is required to achieve the ideal dust reduction effect, and after spraying, the water vapor in the gas will increase, making the humidity in the corrugated paper production workshop relatively high, and the cardboard is prone to getting wet. Summary of the Invention

[0007] In order to solve the problems of slow dust removal speed, unsatisfactory dust removal rate, and easy increase in the moisture of the dust-containing gas in the dust removal equipment for the corrugated paper production line, the present invention provides a dust removal device for a corrugated paper production line.

[0008] The technical solution includes a spray box, an evaporation box, a condensation box and a sedimentation box. An air inlet pipe is arranged at one end of the spray box, and a first air pump is installed on the air inlet pipe. An air outlet pipe is connected to the other end of the spray box, and an atomizing nozzle is arranged on the inner wall of the spray box. The other end of the air outlet pipe is connected to the bottom of the evaporation box, and a throttle valve is installed on the air outlet pipe. A condensation pipe is arranged in the condensation box, and the upper end of the condensation pipe is connected to the top of the evaporation box. A second air pump located between the evaporation box and the condensation box is installed on the condensation pipe. The condensation pipes are arranged in an S shape in the condensation box. A water inlet pipe is provided at the bottom of the condensation box, and a water outlet pipe is provided at the top. Condensed water enters the condensation box from the water inlet pipe and is discharged from the water outlet pipe after filling the condensation box. An exhaust pipe and a drain pipe are connected to the lower end of the condensation pipe. The exhaust pipe extends upward from the top of the condensation box to the outside of the condensation box, and the drain pipe extends downward from the outside of the condensation box to be connected with the bottom of the sedimentation box; a water circulation pipe is provided on the sedimentation box, the lower end of the water circulation pipe is inserted into the sedimentation box, and the upper end is connected with the atomizing nozzle, and a liquid pump is installed on the water circulation pipe; a slag discharge port is opened at the bottom of the sedimentation box, and an end cover is installed on the slag discharge port.

[0009] The spray box is a cylindrical box body, a spiral blade is coaxially installed in the spray box, the spiral blade is fixed, a spiral channel is formed between the spiral blade and the inner wall of the spray box, and a plurality of atomizing nozzles are provided, and the atomizing nozzles are evenly arranged along the spiral channel.

[0010] One end of the air outlet pipe connected to the evaporator is bifurcated into a plurality of branch pipes, and each branch pipe is equipped with a throttle valve.

[0011] The sedimentation tank is equipped with a vertical partition, which divides the sedimentation tank into two parts, the end of the drainage pipe is connected to the bottom of the right half, the lower end of the water circulation pipe is inserted into the bottom of the left half, and an overflow gap is provided between the upper end of the partition and the top of the sedimentation tank.

[0012] A filter screen is installed at the inlet of the water circulation pipe.

[0013] The invention can effectively reduce the amount of dust in a corrugated paper production line and a production workshop, has a higher dust removal rate, a fast dust removal speed, and can dry the dust-containing gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the front view of the present invention.

[0015] Figure 2 It is a front cross-sectional view of the present invention.

[0016] Figure 3 for Figure 2 Enlarged view of position A in the middle. DETAILED DESCRIPTION

[0017] Combined with the attached drawings, the present invention includes a spray box 1, an evaporation box 2, a condensation box 3 and a sedimentation box 4. One end of the spray box 1 is provided with an intake pipe 5, and a first air pump 6 is installed on the intake pipe 5. The other end of the spray box 1 is connected to an outlet pipe 7. The inner wall of the spray box 1 is provided with atomizing nozzles 8. The dust-containing gas is sent into the spray pipe by the first air pump 6 through the intake pipe 5. The atomizing nozzles 8 spray water mist to mix with the dust-containing gas, and the dust-containing gas mixed with the water mist is discharged from the outlet pipe 7.

[0018] The other end of the outlet pipe 7 is communicated with the bottom of the evaporation box 2, and a throttle valve 9 is installed on the outlet pipe 7. A condensation pipe 10 is arranged in the condensation box 3. The upper end of the condensation pipe 10 is communicated with the top of the evaporation box 2, and a second air pump 11 located between the evaporation box 2 and the condensation box 3 is installed on the condensation pipe 10. Under the suction effect of the second air pump 11 and the throttling effect of the throttle valve 9, a negative pressure environment will be formed in the evaporation box 2. At the same time, under the action of the first air pump 6 and the throttle valve 9, a positive pressure environment will be formed in the spray box 1. After the water mist in the dust-containing gas enters the evaporation box 2 through the throttle valve 9, it enters from a high-pressure environment into a low-pressure environment. Therefore, the water mist particles will quickly vaporize into water vapor and mix fully with the dust-containing gas, thus forming a mixture of dust-containing gas and water vapor.

[0019] The condensation pipe 10 is arranged in an S shape in the condensation box 3. The bottom of the condensation box 3 is provided with a water inlet pipe 12, and the top is provided with a water outlet pipe 13. Condensate enters the condensation box 3 from the water inlet pipe 12, fills the condensation box 3 and then is discharged from the water outlet pipe 13. After the mixture of dust-containing gas and water vapor is drawn into the condensation pipe 10 by the second air pump 11, the water vapor liquefies in the condensation pipe 10 with the dust particles in the dust-containing gas as condensation nuclei; the lower end of the condensation pipe 10 is connected with an exhaust pipe 14 and a drain pipe 15. The exhaust pipe 14 extends upward from the top of the condensation box 3 outside the condensation box 3, and the drain pipe 15 extends downward outside the condensation box 3 and is communicated with the bottom of the sedimentation box 4. The water vapor in the mixed gas liquefies in the condensation pipe 10 and is discharged into the sedimentation box 4 through the drain pipe 15, and the remaining gas is discharged from the exhaust pipe 14.

[0020] The sedimentation box 4 is provided with a water circulation pipe 16. The lower end of the water circulation pipe 16 is inserted into the sedimentation box 4, and the upper end is communicated with the atomizing nozzles 8. A liquid pump 17 is installed on the water circulation pipe 16; after the condensate is discharged into the sedimentation box 4, the dust particles therein settle at the bottom of the sedimentation box. The water circulation pipe 16 extracts clear water from the upper part for circulating spraying; a slag discharge port 18 is opened at the bottom of the sedimentation box, and an end cover 19 is installed on the slag discharge port 18. Opening the end cover 19 can discharge the settled dust in the sedimentation box.

[0021] The spray box 1 is a cylindrical box body, and a spiral blade 20 is coaxially installed in the spray box 1. The spiral blade 20 is fixed, and a spiral channel is formed between the spiral blade 20 and the inner wall of the spray box 1. The dust-containing gas enters the spray and moves inward along the spiral channel to the other end. There are multiple atomizing nozzles 8, and the atomizing nozzles 8 are evenly arranged along the spiral channel. During the movement of the dust-containing gas, a number of atomizing nozzles 8 perform a small amount of multiple spraying to fully and evenly mix the water mist and the dust-containing gas.

[0022] One end of the outlet pipe 7 connected to the evaporation box 2 is bifurcated into a plurality of branch pipes 21, each of which is equipped with a throttle valve 9; the plurality of branch pipes 21 can allow the dust-containing gas containing water mist droplets to be fully dispersed in the evaporation box 2, and the pressure drops sharply after passing through the throttle valve 9, so that the dispersed water mist droplets can be quickly vaporized.

[0023] The sedimentation tank is equipped with a vertical partition 22, which divides the sedimentation tank into two parts, the end of the drain pipe 15 is connected to the bottom of the right half, the lower end of the water circulation pipe 16 is inserted into the bottom of the left half, and an overflow seam 23 is provided between the upper end of the partition 22 and the top of the sedimentation tank; the condensed water containing dust particles flows into the right plate part of the sedimentation direction for sedimentation, and as the condensed water level in the right half rises, the settled upper clean water flows from the overflow seam 23 to the left half.

[0024] A filter screen is installed at the inlet of the water circulation pipe 16 to prevent a small amount of unsettled dust particles from entering the atomizing nozzle 8 .

[0025] When the present invention is used to pre-treat the dust-containing gas, the first air pump 6 is started to blow the dust-containing gas from the air inlet pipe 5 into the spray box 1, and the dust-containing gas moves along the spiral channel to the other end. The water pump starts the atomizing nozzle 8 to spray water mist, so that the dust-containing gas is evenly mixed with water mist droplets. Finally, the dust-containing gas containing water mist droplets enters the evaporation box 2 through the air outlet pipe 7.

[0026] Since throttle valves 9 are installed on each branch pipe 21 of the outlet pipe 7, there is local resistance. This local resistance will make the pressure in the spray box 1 higher than the normal atmospheric pressure, and make the pressure in the evaporation box 2 lower than the normal atmospheric pressure. Therefore, after the water mist droplets in the dust-containing gas pass through the throttle valve 9 and enter the evaporation box 2, due to the sudden drop in pressure, the fine water mist droplets will quickly vaporize into water vapor and mix into the dust-containing gas.

[0027] The mixed gas in the evaporator box 2 is pumped into the condenser 10 by the second air pump 11. When passing through the condenser box 3, the water vapor in the mixed gas is liquefied with the dust particles as condensation nuclei. The liquefied water carries the dust particles and flows into the sedimentation box from the drain pipe 15. The dust-removed air is discharged from the exhaust pipe 14.

[0028] Meanwhile, in the condenser 10, the water vapor originally carried in the dust-containing gas will also be condensed and liquefied, thereby removing the water vapor in the dust-containing gas and drying the dust-containing gas.

[0029] When the dust in the settling chamber accumulates to a certain amount, open the end cover 19 to discharge the deposited dust from the slag discharge port 18.

[0030] The present invention has the following technical effects:

[0031] First, by spraying and evaporation, the mixed steam in the dust-containing gas is made uniform, and then through condensation, the water vapor is liquefied with the dust particles as the condensation nuclei, and the condensed water carries away the dust particles and settles in the settling chamber; moreover, compared with the methods of settling by gravity or inertia force and spraying settlement, the dust removal rate of the present invention is higher and the dust removal speed is fast.

[0032] Second, during condensation, not only the later-sprayed water vapor can be removed, but also the water vapor originally carried in the dust-containing gas can be removed, drying the dust-containing gas and avoiding the cardboard from getting wet due to the high humidity in the corrugated paper production workshop.

Claims

1. A dust removal device for a corrugated paper production line, characterized in that: The invention comprises a spray box (1), an evaporation box (2), a condensation box (3) and a sedimentation box (4); an air inlet pipe (5) is provided at one end of the spray box (1), a first air pump (6) is installed on the air inlet pipe (5); the other end of the spray box (1) is connected to an air outlet pipe (7), an atomizing nozzle (8) is provided on the inner wall of the spray box (1); the other end of the air outlet pipe (7) is connected to the bottom of the evaporation box (2), a throttle valve (9) is installed on the air outlet pipe (7); a condensation pipe (10) is provided in the condensation box (3), the upper end of the condensation pipe (10) is connected to the top of the evaporation box (2), and a second air pump (11) is installed on the condensation pipe (10) and is located between the evaporation box (2) and the condensation box (3); the condensation pipe (10) is arranged in an S shape in the condensation box (3), and the bottom of the condensation box (3) is provided with a A water inlet pipe (12) is provided, and a water outlet pipe (13) is provided at the top. Condensed water enters the condensation box (3) from the water inlet pipe (12), fills the condensation box (3) and is discharged from the water outlet pipe (13). The lower end of the condensation pipe (10) is connected to an exhaust pipe (14) and a liquid discharge pipe (15). The exhaust pipe (14) extends upward from the top of the condensation box (3) to the outside of the condensation box (3), and the liquid discharge pipe (15) extends downward from the outside of the condensation box (3) to communicate with the bottom of the sedimentation box (4). A water circulation pipe (16) is provided on the sedimentation box (4). The lower end of the water circulation pipe (16) is inserted into the sedimentation box (4), and the upper end is communicated with the atomizing nozzle (8). A liquid pump (17) is installed on the water circulation pipe (16). A slag discharge port (18) is opened at the bottom of the sedimentation box, and an end cover (19) is installed on the slag discharge port (18).

2. A dust removal device for a corrugated paper production line according to claim 1, characterized in that: The spray box (1) is a cylindrical box body. A spiral blade (20) is coaxially installed in the spray box (1). The spiral blade (20) is fixed and a spiral channel is formed between the spiral blade (20) and the inner wall of the spray box (1). A plurality of atomizing nozzles (8) are provided, and the atomizing nozzles (8) are evenly arranged along the spiral channel.

3. A dust removal device for a corrugated paper production line according to claim 1, characterized in that: One end of the air outlet pipe (7) connected to the evaporator (2) is bifurcated into a plurality of branch pipes (21), and each branch pipe (21) is provided with a throttle valve (9).

4. A dust removal device for a corrugated paper production line according to claim 1, characterized in that: The sedimentation tank is provided with a vertical partition (22), which divides the sedimentation tank into left and right parts. The end of the drainage pipe (15) is connected to the bottom of the right half, and the lower end of the water circulation pipe (16) is inserted into the bottom of the left half. An overflow gap (23) is provided between the upper end of the partition (22) and the top of the sedimentation tank.

5. A dust removal device for a corrugated paper production line according to claim 1, characterized in that: A filter screen is installed at the inlet of the water circulation pipe (16).

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