CN211713030U

CN211713030U - Venturi cooling scrubber

Info

Publication number: CN211713030U
Application number: CN201922328609.2U
Authority: CN
Inventors: 朱学田
Original assignee: China Petroleum and Chemical Corp; Research Institute of Sinopec Nanjing Chemical Industry Co Ltd
Current assignee: China Petroleum and Chemical Corp; Research Institute of Sinopec Nanjing Chemical Industry Co Ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-10-20
Anticipated expiration: 2029-12-23

Abstract

The utility model belongs to the technical field of industrial equipment, and relates to a Venturi cooling scrubber, which is characterized by comprising an air inlet pipe, a Venturi tube and a dehydrator from top to bottom in sequence, wherein the Venturi tube is flexibly connected with the dehydrator through an expansion pipe; the venturi comprises a contraction pipe, a primary throat pipe, a secondary throat pipe and an expansion pipe; the air inlet pipe extends into the shrinkage pipe, and the expansion pipe penetrates through the packing layer and extends into the middle lower part of the degasser; and the contraction pipe, the primary choke and the dehydrator are respectively provided with a top washing water injection pipe, a primary choke water injection pipe and a dehydrator water injection pipe. The venturi cooling washer of the utility model has the characteristics of simple structure, convenient operation, small occupied area of equipment, lower engineering investment and good purifying and cooling effects.

Description

Venturi cooling scrubber

Technical Field

The utility model belongs to the technical field of industrial equipment, a use of novel venturi tube at the high furnace gas dust removal cooling of medium-atmosphere, especially the use on steel industry top coal gas cooling washing cooling is related to, specifically be a venturi tube cooling scrubber.

Background

Dust collectors can be divided into two broad categories, dry dust collectors and wet dust collectors.

The dry dust collector does not need water as a dust collection medium, and accounts for more than 90% of all dust collection systems. Comprises a gravity settling chamber, an inertial dust collector, an electric dust collector, a bag-type dust collector, a cyclone dust collector and the like. The disadvantages of the method are that the toxic and harmful substances in the gas can not be removed sufficiently; when the treatment is improper, secondary dust emission is easily caused.

Wet dust collector, using water as purifying medium. Comprises a spray tower, an impact dust remover, a Venturi scrubber, a foam dust remover, a water film dust remover and the like. The dust-containing gas is closely contacted with water, and the inertial collision and other effects of water drops and particles are utilized to capture or enlarge the particles. Because the processes of mass transfer and heat transfer occur simultaneously in the process of contacting gas and liquid, the dust remover has the functions of dust removal, flue gas temperature reduction and harmful gas absorption. High purification efficiency, simple structure, safe operation and convenient operation and maintenance.

A spray tower scrubber: larger particles are captured by the droplets by the inertial collision, interception, and agglomeration between the droplets and the particles. The technical disadvantage is that fine particles cannot be effectively trapped. An impact type dust remover: the cleaning agent is used for cleaning non-fibrous and non-corrosive dusty gas with the temperature not higher than 300 ℃. The disadvantage is that it cannot treat dusty gases with fibrous, corrosive, high temperature.

A water film dust remover: the lower part of the oil cylinder body of the dust-containing gas is introduced along the tangential direction, rotates and rises, and dust particles are separated under the action of centrifugal force. The water-carrying type water-saving device has the disadvantages of large height, difficult arrangement and water carrying phenomenon in actual operation.

A foam dust remover: the dust-containing gas enters the lower cylinder from the gas inlet and turns upwards rapidly, and larger particles are separated from the gas flow and fall into the lower cone due to the inertia effect. The disadvantage is that the gas resistance drop is large, and the gas resistance drop is not suitable for being used in places with small pressure drop requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of poor dedusting and cooling effects of medium and large gas blast furnace in the existing engineering, and providing a novel Venturi cooling scrubber.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the Venturi cooling washer is characterized by sequentially comprising an air inlet pipe, a Venturi pipe and a dehydrator from top to bottom, wherein the Venturi pipe is flexibly connected with the dehydrator through an expansion pipe; the venturi comprises a contraction pipe, a primary throat pipe, a secondary throat pipe and an expansion pipe; the air inlet pipe extends into the shrinkage pipe, and the expansion pipe penetrates through the packing layer and extends into the middle lower part of the degasser; and the contraction pipe, the primary choke and the dehydrator are respectively provided with a top washing water injection pipe, a primary choke water injection pipe and a dehydrator water injection pipe.

Preferably, a liner is provided within the air inlet tube.

Preferably, the lining is a refractory brick.

Preferably, the top washing water spray pipe is in an annular arrangement.

Preferably, the primary throat water jet pipe is arranged annularly.

Preferably, the dehydrator water injection pipe adopts an annular arrangement.

Preferably, the packing is located in the upper middle portion of the deaerator.

Preferably, the packing is stainless steel structured packing or wood structured packing.

Preferably, the bottom of the degasser is provided with a dustproof accumulation inclined plate which is obliquely arranged, and the bottom of the inclined plate is connected with the liquid outlet.

The part not involved in the utility model is the same as the prior art or can be realized by adopting the prior art.

Compared with the prior art, the utility model discloses improved current wen wei washing dust removal cooling effect, possessed following advantage:

1. the assembly type can be adopted, the sectional manufacturing and the field assembly are realized, and the equipment transportation and the field installation are convenient;

2. the water spraying pipes are arranged at the upper part, the middle part and the lower part in a segmented manner, so that the dust removal effect of equipment can be improved, the pressure loss of gas can be reduced, the washing amount can be reduced, the cooling effect can be improved, the size of the equipment can be reduced, and the manufacturing cost of the equipment can be further reduced;

3. the bottom of the dehydrator is provided with a dustproof accumulation inclined plate to improve the smoothness of water outlet.

The venturi cooling washer of the utility model has the characteristics of simple structure, convenient operation, small occupied area of equipment, lower engineering investment and good purifying and cooling effects.

Drawings

Fig. 1 is a schematic structural diagram of a venturi cooling scrubber according to an embodiment of the present invention.

In the figure: 1-air inlet pipe, 2-top washing water spraying pipe, 3-contraction pipe, 4-first-stage choke water spraying pipe, 5-first-stage choke, 6-second-stage choke, 7-expander, 8-dehydrator water spraying pipe, 9-expansion pipe, 10-dehydrator, 11-filler and 12-inclined plate.

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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "middle", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Examples

The embodiment is the application of the venturi in cooling, washing and cooling of top gas in the steel industry.

The structure of the Venturi cooling scrubber is shown in the attached figure 1, and mainly comprises an air inlet pipe (1), a Venturi pipe and a dehydrator (10); the venturi comprises a contraction pipe (3), a primary throat (5), a secondary throat (6) and an expansion pipe (9).

In the embodiment, the air inlet pipe (1) of the top lining is positioned at the top of the equipment, and the pipeline is lined with refractory bricks and inserted into the interior of the shrinkage pipe (3); the top washing water spraying pipe (2) is positioned at the upper part of the contraction pipe (3) and is annularly arranged; the contraction pipe (3) is positioned at the upper part of the venturi and provides an initial mixing place for gas and water; the primary throat pipe water injection pipe (4) is positioned in the middle of the venturi and is annularly arranged to provide a place for mixing gas and water again; the primary throat (5) is positioned at the lower part of the venturi, the secondary throat (6) is positioned at the end part of the venturi, and the flow velocity of the mixed fluid is improved by changing the cross section of the channel; the expander (7) is positioned in the middle of the washer and mainly used for flexibly connecting the venturi tube with the dehydrator; the water injection pipe (8) of the dehydrator is positioned at the upper part of the dehydrator, the tail end of the gas channel of the scrubber is washed, the gas flow rate is reduced, and the fine particles which are not trapped in the front are mainly trapped, so that the effect of keeping the pass is achieved. The expansion pipe (9) penetrates through the packing layer and extends into the middle lower part of the degasser to provide a passage for gas to enter the dehydrator; the dehydrator (10) is positioned at the lower part of the Venturi scrubber and is used for removing water in the gas by reducing the flow rate; the packing (11) is positioned at the middle upper part of the dehydrator to play a role in increasing gas-liquid contact, and is generally stainless steel regular packing or wood regular packing; the dustproof accumulation inclined plate (12) is obliquely arranged at the bottom of the dehydrator, and the device is arranged at the bottom of the dehydrator for preventing the accumulated particles from being accumulated at the bottom of the dehydrator, so that the collected particles can be conveniently discharged together with water.

In the embodiment, the air inlet is changed from the venturi tube axial direction to the axial direction, the water spray nozzle is changed from the axial direction to the radial direction, and the water inlet is arranged in sections and is divided into three points, namely the upper part of the venturi tube, the first-stage throat pipe and the upper part of the water separator, so that the gas-liquid contact effect is improved, and meanwhile, the resistance drop of equipment is reduced, so that the size of the equipment is reduced, and the manufacturing cost of the equipment is. The flow distribution of water inlet points is as follows: the washing water consumption of the upper water inlet point is about 42 percent of the total amount, the washing water consumption of the middle water inlet point is about 18 percent of the total amount, and the washing water consumption of the lower water inlet point is about 40 percent of the total amount.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A Venturi cooling scrubber is characterized by comprising an air inlet pipe, a Venturi pipe and a dehydrator from top to bottom in sequence, wherein the Venturi pipe is flexibly connected with the dehydrator through an expansion pipe; the venturi comprises a contraction pipe, a primary throat pipe, a secondary throat pipe and an expansion pipe; the air inlet pipe extends into the shrinkage pipe, and the expansion pipe penetrates through the packing layer and extends into the middle lower part of the degasser; and the contraction pipe, the primary choke and the dehydrator are respectively provided with a top washing water injection pipe, a primary choke water injection pipe and a dehydrator water injection pipe.

2. The venturi-cooled scrubber as recited in claim 1 wherein the inlet pipe is lined.

3. The venturi-cooled scrubber as set forth in claim 2, wherein the liner is a refractory brick.

4. The venturi-cooled scrubber according to claim 1, wherein the top scrubbing water injection pipe is in an annular arrangement.

5. The venturi cooling scrubber of claim 1, wherein the primary throat water jet is arranged in an annular arrangement.

6. The venturi cooling scrubber of claim 1, wherein the dehydrator water injection conduit is in an annular arrangement.

7. The venturi-cooled scrubber according to claim 1, wherein the packing is located in an upper middle portion of the deaerator.

8. The venturi-cooled scrubber of claim 1, wherein the packing is stainless steel structured packing or wood structured packing.

9. The venturi cooling scrubber of claim 1, wherein the degasser has a dust-proof inclined stack plate disposed at an inclined position at the bottom of the degasser, and the inclined stack plate is connected to the liquid outlet at the bottom of the degasser.