CN217961314U - Condensation circulation assembly for evaporation tail gas of industrial production fluosilicate product - Google Patents

Abstract

The application discloses industrial production fluorosilicate product evaporation condensation cycle subassembly for tail gas includes: the device comprises an evaporative crystallization tank, an exhaust funnel, a liquid distributor, a primary defoaming wire mesh component, a secondary defoaming wire mesh component, a condenser and a circulating liquid pool; the exhaust funnel is arranged on the top surface of the evaporative crystallization tank; a primary defoaming net component is arranged in the exhaust cylinder; the primary defoaming screen assembly is accommodated and arranged on the upper section of the exhaust funnel; the exhaust port of the exhaust funnel is communicated with a pipeline of the secondary defoaming silk screen component; through set up big pipe diameter blast pipe on the evaporimeter blast pipe to set up two-stage at least silk screen cushion layer in the blast pipe, block a large amount of foams that contain in the come-up steam and realize removing the foam, foam after removing the foam can the backward flow and get into and continue to participate in the evaporation under the inherent condition that does not cool down of evaporimeter, reduces the energy consumption, improves the purity that gets into gas in the condensation pipeline, reduces foam content, thereby is favorable to the recycle of fluorine, silicon element contained in the condensation back gas.

Description

Condensation circulation assembly for evaporation tail gas of industrial production fluosilicate product

Technical Field

The application relates to the technical field of fluorosilicate production, in particular to a condensation circulation component for evaporation tail gas of industrial production fluorosilicate products.

Background

The fluosilicate is an inorganic compound, and can be sold, transported and used in powder form when being used as a curing agent, an enhancer and a waterproof agent in concrete. The fluosilicic acid as a by-product in the production of phosphate fertilizer contains a large amount of fluorine and silicon ions which are not fully utilized, and the fluosilicic acid and metal oxides are mixed and then react to prepare fluosilicate so as to fully utilize the by-product.

In the prior art, the product obtained after the reaction of fluosilicic acid and metal oxide is solution, and the fluosilicate of the powder material can be finally prepared only by evaporation treatment. A large amount of steam is generated in the evaporation process, although the water content in the steam is high, the steam still contains a large amount of fluorine elements and silicon elements, the direct evacuation can cause pollution to the environment, the direct evacuation can also cause the waste of raw materials, and the yield of the fluosilicate is reduced.

The existing treatment means is simple, most of the existing treatment means is that steam is directly introduced into water to be absorbed to form hexafluorosilicic acid, but the absorption efficiency of fluorine elements and silicon elements in the water and the steam is lower, so that the fluorine elements and the silicon elements in the steam cannot be effectively recovered.

The existing condensing assembly has 2 common structures, one is a vertical single-tube structure, and is suitable for being used in an environment with small steam quantity, when the steam quantity is too large, steam in the central direction cannot contact condensed water due to small gas-liquid contact area, so that the steam cannot be condensed into liquid, and a large amount of steam is generated to be discharged; another is a condenser assembly of double tube construction such as the split and collective double row condenser tube assembly of a condenser disclosed in CN202021433926.7, which is used to solve the problems existing in the prior art: the heat exchange tube structure is unreasonable in layout, so that the heat exchange efficiency is reduced; 2. after heat exchange is carried out on the working medium liquid, the temperature distribution of each area is uneven, and the heat exchange effect is limited; 3. the cooling water led into the condenser box body has larger impact force on the heat exchange tubes, and the heat exchange tubes are protected by stability, so the heat exchange tubes are easy to damage. "this condensation subassembly is through setting up two condenser pipes and each condenser pipe is the bending structure to increase the area of contact of gas and comdenstion water liquid wall and solve above-mentioned technical problem.

The problems of the prior art are as follows:

however, the existing condensing assembly cannot be used for solving the technical problems that a large amount of foam piles are contained in fluorosilicate steam, a large amount of gas is wrapped by a liquid film in a single foam pile, and the liquid film prevents the gas from contacting with condensed water, so that the gas in the foam cannot be condensed and separated out.

SUMMERY OF THE UTILITY MODEL

The application provides a condensation circulation subassembly for industrial production fluorosilicate product evaporation tail gas for solve containing a large amount of foams in being used for solving fluorosilicate steam that exists among the prior art and pile, and the foam is piled interior single foam and is wrapped up a large amount of gas by the liquid film, and the liquid film hinders gaseous and condensed water contact and leads to gaseous unable technical problem that can not obtain the condensation and separate out in the foam.

The application provides an industrial production fluorosilicate product evaporation condensation circulation subassembly for tail gas includes: the device comprises an evaporative crystallization tank, an exhaust funnel, a liquid distributor, a primary defoaming wire mesh component, a secondary defoaming wire mesh component, a condenser and a circulating liquid pool; the exhaust funnel is arranged on the top surface of the evaporative crystallization tank; a primary defoaming net component is arranged in the exhaust funnel; the primary defoaming silk screen component is accommodated and arranged at the upper section of the exhaust funnel; the exhaust port of the exhaust funnel is communicated with a pipeline of the secondary defoaming silk screen component; the air outlet of the secondary defoaming silk screen component is communicated with the air inlet path of the condenser pipe; the secondary defoaming silk screen component and the liquid outlet of the condenser are respectively communicated with a circulating liquid pool pipeline; an electric heater is arranged in the evaporative crystallization tank;

the liquid distributor is accommodated in the exhaust funnel; the circulating liquid pool is communicated with a liquid inlet pipeline of the liquid distributor.

Preferably, the method comprises the following steps: a first branch and a second branch; one end of the first branch is arranged below the primary defoaming silk screen component and is communicated with a side wall pipeline of the exhaust funnel; the other end of the first branch is communicated with a pipeline of an air inlet of the secondary defoaming silk screen component; one end of the second branch is arranged above the primary defoaming silk screen component and is communicated with the exhaust funnel pipeline; the other end of the second branch is communicated with a pipeline of an air inlet of the secondary defoaming silk screen component.

Preferably, the method comprises the following steps: a steam crystallization tank; the steam crystallization tank includes: a pressure gauge, a groove body and a cover body; the top surface of the tank body is provided with an opening; the cover body is covered on the opening; the manometer sets up on the lid.

Preferably, it comprises: a first valve and a second valve; the first valve is arranged on the first branch; the second valve is arranged on the second branch.

Preferably, the method comprises the following steps: a circulation line; one end of the circulating pipeline is communicated with the circulating liquid pool pipeline, and the other end of the circulating pipeline is communicated with the liquid inlet pipeline of the liquid distributor; the circulating pump is arranged on the circulating pipeline.

Preferably, the condenser includes: the device comprises a cylinder, a first ventilation pipeline, a second ventilation pipeline, a first liquid discharge port, a second liquid discharge port and a liquid inlet opening; the top surface of the cylinder is provided with a liquid inlet opening; the top end of the first ventilation pipeline is communicated with the liquid inlet opening; the top end of the second vent pipeline is communicated with the liquid inlet opening; the first ventilation pipeline and the second ventilation pipeline are accommodated in the cylinder; the first liquid discharge port and the second liquid discharge port are formed in the bottom surface of the cylinder body; the first vent pipeline is communicated with the first liquid discharge port; the second vent pipeline is communicated with the second liquid outlet; a condensed water inlet is formed in the side wall of the upper part of the cylinder body; a condensed water outlet is arranged on the side wall of the lower part of the cylinder body.

Preferably, the first ventilation line comprises: a plurality of folded tube segments; the adjacent folded pipe sections are communicated; the folding pipe section is arranged in the cylinder body along the longitudinal direction of the cylinder body; the folded pipe section comprises: the inclined pipe sections and the vertical sections are arranged in pairs; the inclined pipe sections are symmetrically arranged at two ends of the vertical section; the vertical section is arranged in parallel with the side wall of the cylinder body.

Preferably, the second vent line comprises a plurality of folded sections; the adjacent folded pipe sections are communicated; the folding pipe section is arranged in the cylinder body along the longitudinal direction of the cylinder body; the folded tube section includes: the inclined pipe sections and the vertical sections are arranged in pairs; the inclined pipe sections are symmetrically arranged at two ends of the vertical section; the vertical section is arranged in parallel with the side wall of the cylinder body.

Preferably, the liquid distributor includes: the liquid inlet main pipe, the liquid separating main pipe, the connecting flange, the liquid distributing pipe, the through hole and the liquid inlet flange are arranged on the liquid inlet main pipe; one end of the liquid inlet main pipe is arranged in the side wall of the exhaust funnel; the other end of the liquid inlet main pipe is communicated with the liquid separation main pipe; a plurality of liquid distribution pipes are inserted in the opposite side walls of the liquid distribution main pipe; the liquid distribution pipe is provided with a through hole; the liquid distribution pipe and the liquid distribution main pipe are installed through a liquid inlet flange.

The beneficial effect that this application can produce includes:

1) The application provides an industrial production fluorosilicate product evaporation condensation cycle subassembly for tail gas, through set up the big pipe diameter blast pipe on the evaporimeter blast pipe, and set up two-stage silk screen cushion at least in the blast pipe, block a large amount of foams that contain in the steam of come-up and realize removing the foam, foam after removing the foam can flow back and continue participating in the evaporation under the condition that does not lower the temperature in getting into the evaporimeter, reduce the energy consumption, improve the purity that gets into gas in the condensation duct, reduce foam content, thereby be favorable to the gaseous fluorine that contains in the condensation back, silicon element's recycle.

2) According to the condensation circulation component for the evaporation tail gas of the industrial production fluorosilicate product, the spraying component is additionally arranged in the pipeline, is communicated with the condensation storage tank pipeline and pumps the condensed and recovered liquid into the evaporation crystallization tank; after the low temperature liquid drop contacted with the high temperature foam, the foam liquid film that the difference in temperature leaded to in the steam that rises broke and improves the displacement, can tentatively cool down steam simultaneously for steam can realize the condensation backward flow in the blast pipe, reduces the displacement. The exhaust volume is reduced, the environment is protected, and the subsequent tail gas treatment difficulty and the subsequent tail gas treatment capacity are reduced.

Drawings

FIG. 1 is a schematic view of a condensation cycle assembly for evaporation tail gas from industrial production of fluorosilicate products provided by the present application;

FIG. 2 is a schematic perspective view of an evaporation tank provided in the present application;

FIG. 3 is a schematic perspective view of a two-stage demister provided in the present application;

FIG. 4 is a perspective view of a defoaming screen provided herein;

fig. 5 is a schematic perspective view of a condensation cylinder provided in the present application;

FIG. 6 is a perspective view of a liquid distributor according to the present application;

illustration of the drawings:

10. a trough body; 101. an electric heater; 102. a cover body; 103. a pressure gauge; 11. an exhaust funnel; 12. a liquid distributor; 121. a liquid inlet main pipe; 122. a liquid separation main pipe; 123. a connecting flange; 124. a liquid distribution pipe; 125. a through hole; 126. a liquid inlet flange; 13. a first-stage defoaming wire mesh component; 141. a first valve; 142. a second valve; 143. a circulation pump; 144. a circulating liquid pool; 151. a cylinder body; 152. a secondary defoaming screen assembly; 153. a support plate; 154. a mounting ring; 161. a condenser; 162. a first vent line; 163. a second vent line; 165. an oblique pipe section; 166. a vertical section; 167. a first drain port; 168. a second liquid discharge port; 164. an air inlet opening.

Detailed Description

To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The controller used in this embodiment is of an existing structure, and the control circuit can be implemented by simple programming by a person skilled in the art, which belongs to the common general knowledge in the art, and is used only without modification, so that the detailed description of the control mode and circuit connection is omitted.

Technical means which are not described in detail in the present application and are not used for solving the technical problems of the present application are all arranged according to common knowledge in the field, and various common knowledge arrangement modes can be realized.

Referring to fig. 1 to 5, the condensation circulation component for evaporation tail gas in industrial production of fluorosilicate products provided by the present application comprises: the device comprises an evaporative crystallization tank, an exhaust funnel 11, a liquid distributor 12, a primary defoaming wire mesh component 13, a secondary defoaming wire mesh component 152, a condenser 161 and a circulating liquid pool 144; the exhaust funnel 11 is arranged on the top surface of the evaporative crystallization tank; a primary defoaming net component is arranged in the exhaust funnel 11; the primary defoaming screen assembly 13 is accommodated and arranged at the upper section of the exhaust funnel 11; the exhaust port of the exhaust funnel 11 is communicated with the pipeline of the secondary defoaming wire mesh component 152; the air outlet of the secondary defoaming wire mesh component 152 is communicated with the air inlet path of the condenser 161 pipe; the liquid outlets of the secondary defoaming screen assembly 152 and the condenser 161 are respectively communicated with the pipeline of the circulating liquid pool 144; an electric heater 101 is arranged in the evaporative crystallization tank;

the liquid distributor 12 is accommodated in the exhaust funnel 11; the circulating liquid pool 144 is communicated with a liquid inlet pipeline of the liquid distributor 12.

Steam generated by the evaporation crystallization tank floats upwards and enters the exhaust funnel 11, and then passes through the primary defoaming wire mesh component 13, so that a large amount of foam can be removed, the foam content in the steam is reduced, and meanwhile, fluorine and silicon elements in the foam are effectively recovered; reducing the amount of foam in the steam entering the condenser 161. The secondary demister wire assembly 152 can enhance the defoaming effect.

After the steam enters the condenser 161, the temperature of the steam can be reduced, the separated liquid flows back into the circulating pool, so that the content of fluorine, silicon and metal elements in the circulating pool is increased, then the circulating water is pumped into the liquid distributor 12, the sprayed liquid drops fall and contact with the rising steam foam, then the temperature of the liquid drops is lower due to the high temperature of the steam in the foam, and the liquid film is broken after instability, so that the content of the foam in the steam is reduced, the temperature of the steam can be reduced by the falling circulating liquid, and the liquefaction and separation can be realized in the exhaust funnel 11. Reduce the exhaust emission and effectively recover fluorine, silicon and metal elements in the steam. The metal element may be an alkali metal such as sodium, magnesium, calcium, etc.

Preferably, it comprises: a first branch and a second branch; one end of the first branch is arranged below the primary defoaming screen assembly 13 and communicated with a side wall pipeline of the exhaust funnel 11; the other end of the first branch is communicated with a pipeline of an air inlet of the secondary defoaming screen assembly 152; one end of the second branch is arranged above the primary defoaming silk screen component 13 and is communicated with the exhaust funnel 11 through a pipeline; the other end of the second branch is communicated with the air inlet pipeline of the second-stage defoaming screen assembly 152.

Preferably, the steam crystallizing tank includes: a pressure gauge 103, a groove body 10 and a cover body 102; the top surface of the tank body 10 is provided with an opening; the cover body 102 is covered on the opening; the pressure gauge 103 is disposed on the cover 102. The operator opens the second branch of the exhaust funnel 11 according to the need to reduce the pressure according to the pressure change in the tank.

Preferably, the method comprises the following steps: a first valve 141 and a second valve 142; the first valve 141 is disposed on the first branch; the second valve 142 is disposed on the second branch. The arrangement is convenient for controlling the opening and closing of each branch according to the requirement.

Preferably, the method comprises the following steps: a circulation line; one end of the circulating pipeline is communicated with the circulating liquid pool 144 pipeline, and the other end is communicated with the liquid inlet pipeline of the liquid distributor 12; the circulation pump 143 is provided on the circulation line. The liquid distribution flow rate can be controlled according to the requirement according to the setting.

Preferably, the condenser 161 includes: the cylinder 151, the first ventilation pipeline 162, the second ventilation pipeline 163, the first drain port 167, the second drain port 168 and the liquid inlet opening; the top surface of the cylinder 151 is provided with a liquid inlet opening; the top end of the first ventilation pipeline 162 is communicated with the liquid inlet opening; the top end of the second vent line 163 is communicated with the liquid inlet opening; the first vent line 162 and the second vent line 163 are accommodated in the cylinder 151; the first drain port 167 and the second drain port 168 are opened on the bottom surface of the cylinder 151; the first vent line 162 communicates with the first drain port 167; the second vent line 163 communicates with the second drain port 168; a condensed water inlet is formed in the side wall of the upper part of the cylinder 151; a condensed water outlet is arranged on the side wall of the lower part of the cylinder 151.

According to the device, the contact area of steam and condensate water can be increased, the condensation efficiency is increased, the tail gas emission is reduced, and effective recovery of useful elements is realized.

Preferably, the first vent line 162 includes: a plurality of folded tube sections; the adjacent folded pipe sections are communicated; the folded pipe section is longitudinally arranged in the cylinder 151 along the cylinder 151; the folded tube section includes: a chute section 165, a vertical section 166 arranged in pairs; the inclined pipe sections 165 are symmetrically arranged at two ends of the vertical section 166; the vertical section 166 is disposed parallel to the sidewall of the cylinder 151.

The arrangement increases the gas-liquid contact area and simultaneously utilizes gravity to facilitate the falling back of condensed liquid drops into the circulating liquid pool 144.

Preferably, the second venting line 163 is a plurality of folded sections; the adjacent folded pipe sections are communicated; the folded pipe section is longitudinally arranged in the cylinder 151 along the cylinder 151; the folded tube section includes: a chute section 165, a vertical section 166 arranged in pairs; the inclined pipe sections 165 are symmetrically arranged at two ends of the vertical section 166; the vertical section 166 is disposed parallel to the sidewall of the cylinder 151.

The arrangement increases the gas-liquid contact area and simultaneously utilizes gravity to facilitate the falling back of condensed liquid drops into the circulating liquid pool 144.

Preferably, the liquid distributor 12 includes: a liquid inlet main pipe 121, a liquid separating main pipe 122, a connecting flange 123, a liquid distributing pipe 124, a through hole 125 and a liquid inlet flange 126; one end of the liquid inlet header pipe 121 is arranged in the side wall of the exhaust funnel 11; the other end of the liquid inlet header pipe 121 is communicated with the liquid separating header pipe 122 through a pipeline; a plurality of liquid distribution pipes 124 are inserted on the opposite side walls of the liquid distribution header pipe 122; the liquid distribution pipe 124 is provided with a through hole 125; liquid distribution pipe 124 and liquid distribution header pipe 122 are mounted by liquid inlet flange 126.

According to the arrangement, the uniform spraying of the liquid drops can be realized, and the contact probability of the liquid drops and the foam is improved.

In one embodiment, each stage of the demister wire assembly comprises: a foam removing wire mesh pad and a support plate 153 arranged on the top surface and the bottom surface of the foam removing wire mesh pad; the support plate 153 is a mesh plate; mounting ring 154 is mounted on the mounting surface; the periphery of the support plate 153 is detachably connected with the mounting ring 154, so that the wire mesh pad can be conveniently detached as required. The used defoaming silk net pad is formed by overlapping steel cable fine nets, the thickness is 10 to 12cm, and the defoaming effect is good.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (9)

1. The utility model provides an industrial production fluorosilicate product evaporation tail gas is with condensation circulation subassembly which characterized in that includes: an evaporative crystallization tank, an exhaust funnel (11), a liquid distributor (12), a primary defoaming screen component (13), a secondary defoaming screen component (152), a condenser (161) and a circulating liquid pool (144); the exhaust funnel (11) is arranged on the top surface of the evaporative crystallization tank; a primary defoaming net component is arranged in the exhaust cylinder (11); the primary defoaming silk screen component (13) is accommodated and arranged at the upper section of the exhaust funnel (11); the exhaust port of the exhaust funnel (11) is communicated with the pipeline of the secondary defoaming wire mesh component (152); the air outlet of the secondary defoaming wire mesh component (152) is communicated with the air inlet path of the condenser (161) pipe; liquid outlets of the secondary defoaming silk screen component (152) and the condenser (161) are respectively communicated with a pipeline of the circulating liquid pool (144); an electric heater (101) is arranged in the evaporative crystallization tank;

the liquid distributor (12) is accommodated in the exhaust funnel (11); the circulating liquid pool (144) is communicated with a liquid inlet pipeline of the liquid distributor (12).

2. The condensation cycle assembly for the evaporation tail gas in the industrial production of fluorosilicate products of claim 1, comprising: a first branch and a second branch; one end of the first branch is arranged below the primary defoaming silk screen component (13) and is communicated with a side wall pipeline of the exhaust funnel (11); the other end of the first branch is communicated with an air inlet pipeline of the secondary defoaming screen assembly (152); one end of the second branch is arranged above the primary defoaming silk screen component (13) and is communicated with the exhaust funnel (11) through a pipeline; the other end of the second branch is communicated with an air inlet pipeline of the secondary defoaming silk screen component (152).

3. The condensation cycle assembly for the evaporation tail gas in the industrial production of fluorosilicate products of claim 1, comprising: a steam crystallization tank; the steam crystallization tank includes: a pressure gauge (103), a tank body (10) and a cover body (102); the top surface of the tank body (10) is provided with an opening; the cover body (102) is arranged on the opening in a covering manner; the pressure gauge (103) is arranged on the cover body (102).

4. The condensation cycle assembly for the evaporation tail gas in the industrial production of fluorosilicate products of claim 2, comprising: a first valve (141) and a second valve (142); the first valve (141) is arranged on the first branch; a second valve (142) is disposed on the second branch.

5. The condensation cycle assembly for the evaporation tail gas in the industrial production of fluorosilicate products of claim 1, comprising: a circulation line; one end of the circulating pipeline is communicated with the circulating liquid pool (144) pipeline, and the other end of the circulating pipeline is communicated with the liquid inlet pipeline of the liquid distributor (12); the circulating pump (143) is provided on the circulating line.

6. The condensing cycle assembly for evaporation tail gas of industrial production of fluorosilicate products of claim 1, wherein said condenser (161) comprises: the liquid discharge device comprises a cylinder body (151), a first ventilation pipeline (162), a second ventilation pipeline (163), a first liquid discharge port (167), a second liquid discharge port (168) and a liquid inlet opening; the top surface of the cylinder body (151) is provided with a liquid inlet opening; the top end of the first ventilation pipeline (162) is communicated with the liquid inlet opening; the top end of the second vent pipeline (163) is communicated with the liquid inlet opening; the first ventilation pipeline (162) and the second ventilation pipeline (163) are accommodated in the cylinder (151); the first liquid discharge port (167) and the second liquid discharge port (168) are arranged on the bottom surface of the cylinder body (151); the first ventilation pipeline (162) is communicated with the first liquid discharge port (167); the second ventilating pipeline (163) is communicated with the second liquid outlet (168); a condensed water inlet is formed in the side wall of the upper part of the cylinder body (151); a condensed water outlet is arranged on the side wall of the lower part of the cylinder body (151).

7. The condensation cycle assembly for industrial production of fluorosilicate product evaporation tail gas of claim 6, wherein the first vent line (162) comprises: a plurality of folded tube segments; the adjacent folded pipe sections are communicated; the folding pipe section is longitudinally arranged in the cylinder body (151) along the cylinder body (151); the folded pipe section comprises: the inclined pipe sections (165) and the vertical sections (166) are arranged in pairs; the inclined pipe sections (165) are symmetrically arranged at two ends of the vertical section (166); the vertical section (166) is disposed parallel to the side wall of the cylinder (151).

8. The condensation cycle assembly for evaporation tail gas of industrial production fluorosilicate products in accordance with claim 6, wherein the second vent line (163) comprises a plurality of folded sections; the adjacent folded pipe sections are communicated; the folding pipe section is longitudinally arranged in the cylinder body (151) along the cylinder body (151); the folded tube section includes: the inclined pipe sections (165) and the vertical sections (166) are arranged in pairs; the inclined pipe sections (165) are symmetrically arranged at two ends of the vertical section (166); the vertical section (166) is disposed parallel to the side wall of the cylinder (151).

9. The condensation circulation assembly for evaporation tail gas of industrial production of fluorosilicate products in accordance with claim 1, wherein said liquid distributor (12) comprises: the liquid inlet header pipe (121), the liquid separating header pipe (122), a connecting flange (123), a liquid distribution pipe (124), a through hole (125) and a liquid inlet flange (126); one end of the liquid inlet header pipe (121) is arranged in the side wall of the exhaust funnel (11); the other end of the liquid inlet header pipe (121) is communicated with the liquid separating header pipe (122) through a pipeline; a plurality of liquid distribution pipes (124) are inserted on the opposite side walls of the liquid distribution header pipe (122); the liquid distribution pipe (124) is provided with a through hole (125); the liquid distribution pipe (124) and the liquid distribution header pipe (122) are installed through a liquid inlet flange (126).

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