CN217340804U

CN217340804U - Defogging dust collector

Info

Publication number: CN217340804U
Application number: CN202221213181.2U
Authority: CN
Inventors: 张秀芳; 智乐乐; 张志方; 陈夏; 王凯; 谢培涛; 李晓峰; 李金超; 李威
Original assignee: Henan Kdneu International Engineering Co ltd
Current assignee: Henan Kdneu International Engineering Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-09-02
Anticipated expiration: 2032-05-20

Abstract

The utility model provides a defogging dust collector for contain the technical problem of steam, solid particle and alkaline fog droplet in solving waste gas. This device includes the casing, the inside overflow baffle that is equipped with of casing, the overflow baffle is first cavity and the second cavity for upper portion intercommunication with casing internal partitioning, its characterized in that is connected with the moisturizing pipe on the casing, inside the moisturizing pipe extends to first cavity, the bottom of second cavity is equipped with the drain pipe, the casing top is equipped with waste gas air intake and waste gas air outlet, the waste gas air intake is connected with the air-supply line, the air-supply line extends to the air-supply line inside of first cavity and the air outlet height of air-supply line is less than the overflow baffle. The utility model discloses well waste gas is directly washed with liquid contact through the air-supply line, and alkali fog and solid impurity are stayed in liquid by the desorption, and noncondensable gas escapes, arranges to safe region unloading through exhaust outlet.

Description

Defogging dust collector

Technical Field

The utility model belongs to the technical field of exhaust-gas treatment, especially, relate to a defogging dust collector.

Background

Partial steam is generated at the discharge end in the production process of the ball mill in the raw material milling section of the alumina plant, and the partial steam is pumped out by a centrifugal fan and conveyed to an outdoor high place for emptying under the general condition. In the exhaust process, the tail gas not only contains steam, but also carries solid particles and alkaline droplets, so that the hidden troubles of environmental protection and safety exist.

In industrial production, most of dust and mist removing devices for treating industrial waste gas emission adopt an impact water bath dust remover, a water film dust remover and various spraying structures, and the dust removing devices have poor effect or need a large amount of water resources. For example, patent publication No. CN208097739U discloses a heavy nitrogen reaction waste gas water seal separation box, in which an exhaust pipe is directly inserted into a gas buffer chamber from top to bottom, and the liquid level in the gas buffer chamber is controlled by adjusting an overflow valve and a liquid level adjusting valve. However, in the above patent, the relief valve is directly communicated with the gas chamber, and gas is inevitably discharged from the relief valve.

SUMMERY OF THE UTILITY MODEL

To foretell technical problem, the utility model provides a defogging dust collector has realized that the overflow liquid level is stable, and the gas after the processing only follows air outlet exhaust purpose.

In order to achieve the above purpose, the technical solution of the present invention is realized as follows:

a demisting and dedusting device comprises a shell, wherein an overflow baffle is arranged in the shell, the overflow baffle divides the shell into a first cavity and a second cavity, the upper parts of the first cavity and the second cavity are communicated, a water supplementing pipe is connected to the shell, the water supplementing pipe extends into the first cavity, a drain pipe is arranged at the bottom of the second cavity, and preferably, the drain pipe is positioned on the side wall of the bottom of the second cavity; the top of the shell is provided with a waste gas inlet and a waste gas outlet, the waste gas inlet is connected with an air inlet pipe, the air inlet pipe extends into the first cavity, and the air outlet of the air inlet pipe is lower than the overflow partition plate.

Preferably, the water replenishing pipe and the air inlet pipe are positioned above the first chamber.

And a water replenishing valve is arranged on the water replenishing pipe, and a water draining valve is arranged on the water draining pipe.

Preferably, the water replenishing valve is a pneumatic or electric valve; the drainage valve is a pneumatic or electric valve.

Be provided with the level gauge on the lateral wall of second cavity, moisturizing valve and drainage valve and level gauge interlocking, the level gauge can monitor the liquid level height of second cavity, and then the switch of automatic control moisturizing valve and drainage valve adjusts the liquid level height of second cavity.

The bottom of the first cavity and the bottom of the second cavity are respectively provided with a sewage draining hand hole, and impurities deposited in the two cavities are cleaned through the sewage draining hand holes.

The air inlet pipe is a telescopic pipe and extends into the first chamber to a position H1 higher than the lower part of the overflow partition plate, H1 is the vertical distance from the air outlet of the air inlet pipe to the highest position of the overflow partition plate, the value of H1 is related to the full pressure of the centrifugal fan, and the pressure generated by liquid at the position H1 higher is ensured to be smaller than the pressure at the outlet of the air inlet pipe, so that waste gas can smoothly enter the liquid in the first chamber. The extension height H1 of the air inlet pipe can be adjusted according to specific conditions by adopting the extension pipe.

Preferably, a baffle is arranged at the air outlet of the air inlet pipe, the baffle is sleeved on the air inlet pipe, through holes are formed in the baffle, gas discharged from the air inlet pipe diffuses to the periphery along the baffle, and the large bubbles are divided by the through holes in the baffle, so that the contact area between the gas and the liquid is enlarged.

Preferably, a grid plate is arranged in the first chamber and located above an air outlet of the air inlet pipe, gas discharged from the air inlet pipe passes through the grid plate in the floating process, and grids on the grid plate divide large bubbles into small bubbles again, so that the contact area of the gas and liquid is enlarged.

In the use process of the device, the liquid level in the first chamber is kept equal to that of the overflow partition plate, the liquid level in the second chamber is monitored by the liquid level meter, and the liquid level in the second chamber is kept between H2 and H3 through the interlocking control of the liquid level meter, the water replenishing valve and the water discharging valve, and the value of H2 is the lowest height of the liquid level in the second chamber and is larger than the top height of the water discharging pipe so as to avoid waste gas from directly overflowing from the water discharging pipe; the value of H3 is the maximum height of the liquid level in the second chamber and should be greater than H2 but not greater than the height of the top of the overflow partition. Before starting, when the liquid level of the second chamber is lower than the top height of the drain pipe, the water replenishing valve is opened, water firstly enters the first chamber, the liquid level of the first chamber is higher than the overflow partition plate and then overflows into the second chamber, and when the liquid level reaches H2, the water replenishing valve is automatically closed. When the device is operated, the alkali steam and impurities in the waste gas continuously enter the first chamber, so that the liquid level of the first chamber is kept equal to that of the overflow partition plate, redundant liquid overflows into the second chamber, when the liquid level of the second chamber continuously rises to H3, the drainage valve is automatically opened for drainage, sewage is drained to a nearby sewage tank and finally returns to the process flow, and when the liquid level falls to H2, the drainage valve is automatically closed.

The utility model has the advantages that: the waste gas directly contacts with liquid through the air inlet pipe for washing, the alkali fog and solid impurities are removed and left in the liquid, the non-condensable gas escapes, and the waste gas is discharged to a safe region through a waste gas outlet and is discharged to the atmosphere. The overflow clapboard plays a role in controlling the height of the liquid level, and the overflow liquid is stored in the second chamber and is discharged from the drain pipe at the bottom after reaching a certain height. The discharged sewage enters the sewage tank and finally enters the process flow, no extra waste water is generated, and the water resource is saved because a continuous water source is not needed. In addition, the water outlet of the water discharge pipe is always below the liquid level, so that the gas can be prevented from flowing out of the water discharge pipe. And the automatic water replenishing of the first cavity and the automatic water draining of the second cavity are realized by adopting the liquid level meter to control the water replenishing valve and the water draining valve in an interlocking manner. The setting through baffle or grid plate is cut apart the bubble in the liquid, and the area of contact of increase and liquid effectively improves the efficiency of defogging dust removal.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a first chamber; 2. a second chamber; 3. an overflow baffle; 4. a water replenishing pipe; 41. a water replenishing valve; 5. a drain pipe; 51. a drain valve; 6. a waste gas inlet; 61. an air inlet pipe; 7. a waste gas outlet; 8. a hand hole for sewage disposal; 9. a liquid level meter.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

Example 1

The utility model provides a defogging dust collector, includes the casing, and casing inside is provided with overflow baffle 3, and overflow baffle 3 is the first cavity 1 and the second cavity 2 of upper portion intercommunication with casing internal partitioning, and the liquid is stored in the first cavity 1, and liquid level height is the highest same with 3 highly of overflow baffle, and unnecessary liquid overflows overflow baffle 3 and gets into second cavity 2. Be connected with moisturizing pipe 4 on the casing, inside moisturizing pipe 4 extended to first cavity 1, moisturizing pipe 4 can supply the liquid that first cavity 1 runs off at any time. The bottom of the second chamber 2 is provided with a drain pipe 5, and the liquid stored in the second chamber 2 finally flows out through the drain pipe 5. The casing top is equipped with waste gas air intake 6 and waste gas air outlet 7, and waste gas air intake 6 is connected with air-supply line 61, and air-supply line 61 extends to 1 inside and air-supply line 61 of first cavity air outlet and is less than overflow baffle 3, guarantees that waste gas passes through the washing of liquid, and alkali fog and solid impurity are got rid of and are stayed in the liquid, and noncondensable gas escapes, discharges to safe region evacuation through waste gas air outlet 7.

Example 2

A water replenishing valve 41 is arranged on a water replenishing pipe 4, a water draining valve 51 is arranged on a water draining pipe 5, the water draining pipe 5 is connected into a trench and drained into a sewage tank, and extra wastewater cannot be generated in the final process flow of returning. Preferably, the water replenishing valve 41 is a pneumatic or electric valve; preferably, the drain valve 51 is a pneumatic or electric valve. The shell is provided with a liquid level meter 9, the water replenishing valve 41 and the water draining valve 51 are interlocked with the liquid level meter 9, and the liquid level meter 9 can monitor the liquid level height of the second chamber 2, so that the water replenishing valve 41 and the water draining valve 51 are automatically controlled. The bottom of first cavity 1 and second cavity 2 is equipped with a blowdown hand hole 8 respectively, clears up two cavities through blowdown hand hole 8 during parking maintenance. The air inlet pipe 61 is a telescopic pipe, the air inlet pipe 61 extends into the first chamber 1 to a position H1 higher than the lower part of the overflow partition plate 3, the value of H1 is related to the full pressure of the centrifugal fan, and the pressure generated by the liquid at the position H1 higher is ensured to be smaller than the pressure at the outlet of the centrifugal fan, so that the waste gas pumped by the centrifugal fan can smoothly enter the liquid in the first chamber 1. The telescopic pipe adopted by the air inlet pipe 61 can adjust the extending height H1 of the air inlet pipe 61 according to specific conditions.

The other structure is the same as that of embodiment 1.

Example 3

A baffle plate is arranged at an air outlet of an air inlet pipe 61 and is an annular baffle plate, and the baffle plate is sleeved at the pipe opening of the air inlet pipe 61. Preferably, the baffle is provided with through holes, and the through holes on the baffle are distributed radially from inside to outside. The gas discharged from the air inlet duct 61 is first diffused toward the periphery along the baffle plate and then discharged floating upward from the edge of the baffle plate, which can increase the flow path of the gas in the liquid and the contact area with the liquid. And the large bubbles are divided into small bubbles by the through holes on the baffle plate, so that the contact area of the gas and the liquid is further enlarged, and the demisting and dedusting efficiency is improved.

The other structure is the same as embodiment 2.

Example 4

The utility model provides a defogging dust collector, the inside grid board that is equipped with of first cavity 1, the last mesh that has a run through of grid board, the size of mesh is greater than the granularity of solid impurity, grid board horizontal installation is equipped with the hole on the grid board on shells inner wall and overflow baffle 3, the hole diameter is the same with air-supply line 61 size, air-supply line 61 passes the hole, the grid board is located the top of the air outlet of air-supply line 61. The gas discharged from the air inlet pipe 61 passes through the grid plate in the floating process, and the large bubbles are divided into small bubbles by the meshes on the grid plate, so that the contact area of the gas and the liquid is enlarged, and the demisting and dedusting efficiency is improved.

The other structure is the same as that of embodiment 2.

In the using process of the device, firstly, the height of the air inlet pipe 61 extending into the first chamber 1 to H1 below the overflow partition plate 3 is adjusted, H1 is the vertical distance between the air outlet of the air inlet pipe 61 and the highest position of the overflow partition plate 3, the value of H1 is related to the full pressure of the centrifugal fan, and the pressure generated by the liquid at the height of H1 is smaller than the pressure of the outlet of the air inlet pipe 61, so that the waste gas can smoothly enter the liquid in the first chamber 1. The air inlet pipe 61 adopts a telescopic pipe, and the extending height H1 of the air inlet pipe 61 can be adjusted according to specific conditions.

Next, the values of H2 and H3 are set, the level of the liquid in the second chamber is monitored by the level gauge 9, and is maintained between H2-H3 by the interlocking control of the level gauge 9 with the make-up valve 41 and the drain valve 51. The value of H2 is the lowest level of the liquid level in the second chamber 2, and should be greater than the top level of the drain pipe 5 to avoid the exhaust gas from escaping directly from the drain pipe 5; the value of H3 is the maximum height of the liquid level in the second chamber 2 and should be greater than H2 but not greater than the height of the top of the overflow partition 3. Before starting, or when the liquid level of the second chamber 2 is lower than the top height of the drain pipe 5, the water supplementing valve 41 is opened, water firstly enters the first chamber 1, the liquid level of the first chamber 1 is higher than the liquid level of the overflow partition plate 3 and then overflows into the second chamber 2, and when the liquid level reaches H2, the water supplementing valve 41 is automatically closed. During operation, as the alkali steam and impurities in the waste gas continuously enter the first chamber 1, the liquid level of the first chamber 1 can be kept equal to that of the overflow partition plate 3, redundant liquid overflows into the second chamber 2, when the liquid level of the second chamber 2 continuously rises to H3, the drain valve 51 is automatically opened for draining, sewage is drained to a nearby sewage tank and finally returns to the process flow, and when the liquid level falls to H2, the drain valve 51 is automatically closed.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a defogging dust collector, which comprises a housin, inside overflow baffle (3) that is equipped with of casing, overflow baffle (3) are first cavity (1) and second cavity (2) for upper portion intercommunication for casing internal separation, a serial communication port, be connected with moisturizing pipe (4) on the casing, moisturizing pipe (4) extend to inside first cavity (1), the bottom of second cavity (2) is equipped with drain pipe (5), the casing top is equipped with waste gas air intake (6) and exhaust air outlet (7), waste gas air intake (6) are connected with air-supply line (61), air-supply line (61) extend to inside and air-supply line (61) air outlet height of first cavity and be less than overflow baffle (3).

2. A defogging and dedusting device according to claim 1, wherein a water replenishing valve (41) is arranged on the water replenishing pipe (4).

3. A defogging and dedusting device as recited in claim 2 wherein said water replenishment valve (41) is a pneumatic or electric valve.

4. A defogging and dedusting device according to claim 3, wherein a drain valve (51) is arranged on the drain pipe (5).

5. A defogging and dedusting device according to claim 4, wherein the drain valve (51) is a pneumatic or electric valve.

6. A defogging and dedusting device according to claim 5, wherein a liquid level meter (9) is arranged on the side wall of the second chamber (2), and the water supply valve (41) and the drain valve (51) are interlocked with the liquid level meter (9).

7. A defogging and dedusting device according to any one of claims 1-6, wherein the bottom of the first chamber (1) and the bottom of the second chamber (2) are respectively provided with a pollution discharge hand hole (8).

8. A defogging and dedusting device as recited in claim 7 wherein said air inlet duct (61) is a telescopic duct.

9. A defogging and dedusting device according to claim 8, wherein the air outlet of the air inlet pipe (61) is provided with a baffle plate, the baffle plate is sleeved on the air inlet pipe (61), and the baffle plate is provided with a through hole.

10. A defogging and dedusting device according to claim 8, wherein a grid plate is arranged inside the first chamber (1), and the grid plate is positioned above the air outlet of the air inlet pipe (61).