CN213726541U - Tube-pass anti-corrosion mercury-free catalytic chloroethylene converter - Google Patents

Abstract

The utility model provides a mercury-free catalysis chloroethylene converter of pipe-pass anticorrosion, which comprises a tank body, jar body top fixed connection intake pipe, jar body bottom fixed connection outlet duct, pipe sheet and low tube plate on the horizontal fixed mounting of jar body, it is located tube sheet below down to go up the pipe sheet, it passes through a plurality of vertical heat exchange tubes and low tube plate fixed connection to go up the pipe sheet, pipe sheet and low tube plate are passed respectively to the heat exchange tube both ends, jar side wall is fixed connection heat transfer admission pipe and heat transfer discharge pipe respectively, the mouth of pipe of heat transfer admission pipe and heat transfer discharge pipe is located between pipe sheet and the low tube plate, jar internal top fixed mounting silk screen demister and liquid collection fill, the silk screen demister is located the orificial below of intake pipe bottom, the vertical fixed connection catheter in liquid collection fill bottom, catheter bottom fixed mounting valve. The utility model provides a tube head of the inside heat exchange tube of converter that exists among the prior art is easily by the problem of corruption, has produced the effect that improves chloroethylene converter life.

Description

Tube-pass anti-corrosion mercury-free catalytic chloroethylene converter

Technical Field

The utility model relates to a chloroethylene production facility technical field especially relates to a mercury-free catalysis chloroethylene converter of pipe-line anticorrosion.

Background

Chloroethylene is produced by a calcium carbide acetylene method, a converter is one of key devices in a chloroethylene production line, the normal operation of the converter plays a critical role in the production capacity of the production line, hydrogen chloride and acetylene are introduced into the converter, and the hydrogen chloride and the acetylene react to produce chloroethylene.

The prior mercury-free catalytic chloroethylene converter is characterized in that mixed gas for reaction is introduced into a tank body, two tube plates are horizontally and fixedly arranged in the tank body, the two tube plates are connected through a plurality of heat exchange tubes, the two tube plates divide the interior of the tank body into three parts, a high-temperature heat exchange medium is introduced into an area between the two tube plates, so as to meet the conditions of chloroethylene production, the mixed gas for reaction enters the heat exchange tube and is subjected to catalytic conversion to generate chloroethylene, but the content of the water vapor in the mixed gas for reaction is 6 percent, so that part of the water vapor reacts with the hydrogen chloride in the mixed gas for reaction to generate hydrochloric acid in the tank body, and further the tube head of the heat exchange tube in the tank body is corroded, because the heat exchange tube is mostly fixed on the tube plate in a welding mode, and the welding seam is on the surface of the tube plate, if hydrochloric acid corrodes the welding seam on the surface of the tube plate, the heat exchange tube can fall off, and finally the interior of the converter is damaged.

SUMMERY OF THE UTILITY MODEL

To the not enough that exists among the prior art, the utility model provides a mercury-free catalysis chloroethylene converter that tube side anticorrosion, it has solved the easy problem of corroding of tube head of the inside heat exchange tube of converter that exists among the prior art.

According to the embodiment of the utility model, a mercury-free catalysis chloroethylene converter with pipe pass corrosion protection comprises a tank body, an air inlet pipe is fixedly connected with the top of the tank body, an air outlet pipe is fixedly connected with the bottom of the tank body, an upper pipe plate and a lower pipe plate are horizontally and fixedly installed in the tank body, the upper pipe plate is positioned below the lower pipe plate and is fixedly connected with the lower pipe plate through a plurality of vertical heat exchange pipes, two ends of each heat exchange pipe respectively pass through the upper pipe plate and the lower pipe plate, the side wall of the tank body is respectively and fixedly connected with a heat exchange inlet pipe and a heat exchange discharge pipe, the pipe orifices of the heat exchange inlet pipe and the heat exchange discharge pipe are positioned between the upper pipe plate and the lower pipe plate, a wire mesh demister and a liquid collecting hopper are fixedly installed at the top of the tank body, the wire mesh demister is positioned below the pipe orifice at the bottom of the air inlet pipe, the wire mesh demister is positioned in the liquid collecting hopper, a liquid catheter is vertically and fixedly connected with the bottom of the liquid collecting hopper, and the bottom of the liquid guiding pipe passes through the bottom of the tank body, the bottom end of the liquid guide pipe is fixedly provided with a valve.

Preferably, a plurality of heat exchange tubes are fixedly connected with a baffling component for backflow of a heat exchange medium.

Preferably, the baffling subassembly includes a plurality of disc-shaped first deflectors and second deflectors, and first deflectors and second deflectors are along the tube side interval distribution of heat exchange tube, and the round hole is seted up at first deflectors middle part.

Preferably, the diameter of the circular hole in the middle of the first baffle plate is smaller than that of the second baffle plate.

Preferably, the top and the bottom of the baffle assembly are both the first baffle plate, the heat exchange inlet pipe is positioned between the lower pipe plate and the baffle assembly, and the heat exchange outlet pipe is positioned between the upper pipe plate and the baffle assembly.

Preferably, the outer peripheral surface of the first baffle plate is in contact with the inner wall of the tank body, and the axis of the circular hole in the middle of the second baffle plate is superposed with the central line of the tank body.

Compared with the prior art, the utility model discloses following beneficial effect has: through at the internal top installation silk screen demister of jar for gas that flows into in the intake pipe jar body passes through silk screen demister gas-liquid separation, the vapor of being separated by the silk screen demister collects and forms the liquid drop and instils into liquid and collect and fight, and finally during liquid flows into the catheter, regularly open the valve on the catheter and carry out the flowing back, and the effectual vapor and the hydrogen chloride reaction of avoiding in the jar body generate hydrochloric acid, has realized the anticorrosion of heat exchange tube side, has improved the life of converter.

Drawings

Fig. 1 is a front view of an embodiment of the present invention.

Fig. 2 is a schematic diagram of an internal structure of an embodiment of the present invention.

In the above drawings: 1. a tank body; 2. an air inlet pipe; 3. a wire mesh demister; 4. a liquid collection hopper; 5. an upper tube sheet; 6. a heat exchange pipe; 7. a lower tube plate; 8. a catheter; 9. an air outlet pipe; 10. a heat exchange inlet pipe; 11. a heat exchange discharge pipe; 12. a first baffle plate; 13. a second baffle plate; 14. a baffle assembly.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

As shown in figures 1-2, in order to improve the practical life of the vinyl chloride converter, the embodiment of the utility model provides a mercury-free catalytic vinyl chloride converter with pipe-pass corrosion protection, which comprises a tank body 1, an air inlet pipe 2 is fixedly connected on the top of the tank body 1, an air outlet pipe 9 is fixedly connected on the bottom of the tank body 1, an upper pipe plate 5 and a lower pipe plate 7 are horizontally and fixedly arranged in the tank body 1, the upper pipe plate 5 is positioned below the lower pipe plate 7, the upper pipe plate 5 is fixedly connected with the lower pipe plate 7 through a plurality of vertical heat exchange pipes 6, two ends of the heat exchange pipes 6 respectively pass through the upper pipe plate 5 and the lower pipe plate 7, the side wall of the tank body 1 is respectively and fixedly connected with a heat exchange inlet pipe 10 and a heat exchange outlet pipe 11, the orifices of the heat exchange inlet pipe 10 and the heat exchange outlet pipe 11 are positioned between the upper pipe plate 5 and the lower pipe plate 7, a wire mesh demister 3 and a liquid collecting hopper 4 are fixedly arranged on the top in the tank body 1, the wire mesh demister 3 is positioned below the bottom orifice of the air inlet pipe 2, the silk screen demister 3 is located the liquid and collects and fights 4, and the vertical fixed connection catheter 8 in liquid collection fights 4 bottoms, and 1 bottom of jar body is passed to catheter 8 bottom, 8 bottom fixed mounting valves of catheter.

The embodiment of the utility model provides a process of production hydrogen chloride does: the mixed gas for reaction enters the tank body 1 through the gas inlet pipe 2, water vapor in the mixed gas for reaction is collected by the wire mesh demister 3 when the mixed gas passes through the wire mesh demister 3, the mixed gas for reaction flows out of the upper part of the liquid collecting hopper 4, enters the bottom of the tank body 1 through the heat exchange pipe 6 and is finally discharged from the gas outlet pipe 9; the water vapor collected by the silk screen demister 3 is converged to form water drops and then is dripped into the inner surface of the liquid collecting hopper 4, the liquid collecting hopper 4 is tapered, the liquid flows into the liquid guide tube 8 from the bottom of the liquid collecting hopper 4 and is retained in the liquid guide tube 8, and the valve on the liquid guide tube 8 is periodically opened to drain the liquid in the liquid guide tube 8; the gas discharged into the tank body 1 from the gas inlet pipe 2 contains hydrogen chloride gas which can inevitably react with water in the liquid collecting hopper 4 and the liquid guide pipe 8 to produce hydrochloric acid, so that the liquid collecting hopper 4 and the liquid guide pipe 8 are both made of corrosion-resistant plastic materials; the heat exchange medium uses heptane gas, the heptane gas enters the tank body 1 from the heat exchange inlet pipe 10, and the heptane gas heats the mixed gas for reaction when the mixed gas for reaction passes through the heat exchange pipe 6, because the reaction of hydrogen chloride and acetylene is an exothermic reaction, the temperature exceeds the optimal temperature for reaction due to overhigh temperature, so the heptane gas can take out the redundant heat in the tank body 1 when leaving the tank body 1 from the heat exchange discharge pipe 11, and the reaction is more stable.

As shown in fig. 2, in order to make the heptane gas fully release and absorb heat, a baffle assembly 14 for backflow of the heat exchange medium is fixedly connected to the plurality of heat exchange tubes 6; the passage of the unit heptane gas through the interior of the vessel 1 is increased by the baffle assembly 14, and the unit heptane gas is sufficiently in contact with the heat exchange tubes 6 within the vessel 1.

As shown in fig. 2, in order to increase the unit heptane gas stroke in the tank, the baffle assembly 14 includes a plurality of circular plate-shaped first baffles 12 and second baffles 13, the first baffles 12 and the second baffles 13 are distributed at intervals along the tube pass of the heat exchange tube 6, and a circular hole is formed in the middle of the first baffles 12; the heptane gas continuously flows through the through hole in the middle of the first baffle plate 12 and the side of the second baffle plate 13.

As shown in fig. 2, in order to further increase the travel of the heptane gas in the tank 1, the diameter of the circular hole in the middle of the first baffle 12 is smaller than the diameter of the second baffle 13.

As shown in fig. 2, in order to make the heptane gas flow through the baffle assembly 14 orderly, the top and bottom of the baffle assembly 14 are both the first baffle plate 12, the heat exchange inlet pipe 10 is located between the lower tube plate 7 and the baffle assembly 14, and the heat exchange outlet pipe 11 is located between the upper tube plate 5 and the baffle assembly 14; heptane gas enters from the bottom of the side surface of the tank body 1, flows out from the top of the side surface of the tank body 1 after flowing through the baffle assembly 14, and the first baffle plate 12 ensures that the stroke of the heptane gas in the baffle assembly 14 is more accurate and stable, thereby ensuring that the conversion efficiency of vinyl chloride is stable.

As shown in fig. 2, in order to make the heptane gas flow through the baffle assembly 14 uniformly, the outer peripheral surface of the first baffle plate 12 contacts the inner wall of the tank 1, and the axis of the central circular hole of the second baffle plate 13 coincides with the center line of the tank 1; further defining the flow path of the heptane gas within the baffle assembly 14.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (6)

1. The utility model provides a mercury-free catalysis chloroethylene converter of tube side anticorrosion, which comprises a tank body (1), jar body (1) top fixed connection intake pipe (2), jar body (1) bottom fixed connection outlet duct (9), horizontal fixed mounting goes up tube sheet (5) and tube sheet (7) down in jar body (1), it is located tube sheet (7) below down to go up tube sheet (5), go up tube sheet (5) through a plurality of vertical heat exchange tube (6) and tube sheet (7) fixed connection down, tube sheet (5) and tube sheet (7) down are passed respectively at heat exchange tube (6) both ends, jar body (1) lateral wall is fixed connection heat transfer admission pipe (10) and heat transfer discharge pipe (11) respectively, the mouth of pipe of heat transfer admission pipe (10) and heat transfer discharge pipe (11) is located between tube sheet (5) and tube sheet (7) down, its characterized in that: top fixed mounting silk screen demister (3) and liquid are collected and are fought (4) in jar body (1), and silk screen demister (3) are located intake pipe (2) bottom orificial below, and silk screen demister (3) are located liquid and collect and fight (4), and liquid is collected and is fought vertical fixed connection catheter (8) in (4) bottom, and the jar body (1) bottom is passed to catheter (8) bottom, catheter (8) bottom fixed mounting valve.

2. The on-line corrosion-resistant mercury-free catalytic vinyl chloride converter of claim 1, wherein: and the heat exchange tubes (6) are fixedly connected with baffle assemblies (14) for flowing back heat exchange media.

3. The on-line corrosion-resistant mercury-free catalytic vinyl chloride converter of claim 2, wherein: the baffle assembly (14) comprises a plurality of circular plate-shaped first baffle plates (12) and a plurality of circular plate-shaped second baffle plates (13), the first baffle plates (12) and the second baffle plates (13) are distributed at intervals along the tube side of the heat exchange tube (6), and the middle parts of the first baffle plates (12) are provided with round holes.

4. The on-line corrosion-resistant mercury-free catalytic vinyl chloride converter of claim 3, wherein: the diameter of the circular hole in the middle of the first baffle plate (12) is smaller than that of the second baffle plate (13).

5. The on-line corrosion-resistant mercury-free catalytic vinyl chloride converter of claim 4, wherein: baffling subassembly (14) top and bottom are first baffling board (12), heat transfer admission pipe (10) are located down between tube sheet (7) and baffling subassembly (14), heat transfer discharge pipe (11) are located between last tube sheet (5) and baffling subassembly (14).

6. The on-line corrosion-resistant mercury-free catalytic vinyl chloride converter of claim 5, wherein: the outer peripheral surface of the first baffle plate (12) is in contact with the inner wall of the tank body (1), and the axis of the middle circular hole of the second baffle plate (13) is superposed with the central line of the tank body (1).

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