Chlorobenzene drying device

Abstract

The utility model discloses a chlorobenzene drying device, relates to the technical field of chlorobenzene production, and solves the technical problems that chlorobenzene liquid is heated by steam, the drying efficiency is low, and insufficient heat utilization is easily caused. Comprising a convex heat preservation cavity and a convex heat conduction cover installed in the convex heat preservation cavity, a steam channel is formed between the convex heat preservation cavity and the convex heat conduction cover and communicates with a steam inlet pipe, the position, close to the top end, of the convex heat conduction cover communicates with a negative pressure pipe, and the outer side wall of the bottom end of the convex heat conduction cover is sequentially sleeved with a plurality of coil pipes; branch pipes are communicated among the plurality of coil pipes, the coil pipe at the bottom end is communicated with the interior of the convex heat conduction cover, the coil pipe at the top end is communicated with a liquid pumping pipe, and a pump body communicated with the liquid pumping pipe is mounted on the outer side of the convex heat preservation cavity. According to the device, circulating flow distribution heating is conveniently conducted on the chlorobenzene liquid, the drying efficiency of the chlorobenzene liquid is improved, preheating is conveniently achieved through condensate water formed by steam, and the utilization rate of heat energy is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of chlorobenzene production, in particular to a chlorobenzene drying device. Background Art

[0002] Chlorobenzene is an important organic chemical product and an intermediate in dyes, medicines and organic synthesis. It is used to produce phenol, dinitrochlorobenzene, aniline, nitrophenol, DDT, etc. There are two industrial production methods: intermittent method and continuous method. At present, the tower boiling continuous method is widely used in China. Benzene and chlorine are continuously chlorinated in a ratio of 4:1 under the action of iron catalysis to produce chlorinated liquid and by-product hydrogen chloride.

[0003] During the production process of chlorobenzene, the chlorobenzene liquid needs to be dried to remove moisture. The presence of water in chlorobenzene may affect its purity and quality, and thus affect its use effect. Drying can remove the moisture in chlorobenzene and ensure that it reaches the required purity standard.

[0004] At present, steam is usually used directly for heating and drying in the process of drying chlorobenzene liquid. During the steam heating process, the chlorobenzene liquid in the middle of the container cannot be fully heated, which can easily affect the drying efficiency. Secondly, the condensed water formed during the steam heating process still has a certain amount of heat. If the condensed water is directly discharged, it will cause heat loss, resulting in more energy consumption in the drying of chlorobenzene. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a chlorobenzene drying device, which solves the problem that the drying efficiency of chlorobenzene liquid is low when heated by steam, which easily leads to insufficient heat utilization.

[0006] To achieve the above-mentioned purpose, according to an embodiment of the first aspect of the utility model, a chlorobenzene drying device is proposed, comprising a convex insulation chamber and a convex heat-conducting cover installed in the convex insulation chamber, a steam channel is formed between the convex insulation chamber and the convex heat-conducting cover, and the steam channel is connected to a steam inlet pipe, the convex heat-conducting cover is connected to a negative pressure pipe near the top position, a plurality of coils are sequentially mounted on the outer wall of the bottom end of the convex heat-conducting cover, a branch pipe is connected between the plurality of coils, the coils at the bottom end are connected to the inside of the convex heat-conducting cover, the coils at the top end are connected to a liquid extraction pipe, a pump body connected to the liquid extraction pipe is installed on the outside of the convex insulation chamber, an annular shell is installed on the inner top end of the convex insulation chamber, a plurality of drainage pipes corresponding to the inner wall of the convex heat-conducting cover are connected at the side wall of the bottom end of the annular shell, and the output end of the pump body is connected to a liquid delivery pipe extending into the annular shell.

[0007] As a further technical solution of the utility model, the convex insulation chamber includes an annular base and a cylinder, the cylinder is connected to the annular base, a faucet is installed on the side wall of the annular base near the bottom, and a transparent viewport is installed on the outer wall of the annular base.

[0008] As a further technical solution of the utility model, the convex heat-conducting cover includes an annular bottom cover and an annular top cover, the annular bottom cover is fixedly installed on the inner bottom of the annular base, the bottom of the annular top cover is connected to the top of the annular bottom cover, and the top of the annular top cover is connected to the top of the cylinder body, and the bottom of the annular base is installed with a liquid outlet, and the annular bottom cover covers the liquid outlet.

[0009] As a further technical solution of the utility model, the inner cavity of the annular bottom cover is used to contain chlorinated benzene liquid, and the top of the annular bottom cover is connected to a liquid inlet pipe that passes through the top of the annular base.

[0010] As a further technical solution of the utility model, a spiral heat exchange tube is provided in the annular bottom cover, the top end of the spiral heat exchange tube is connected to a return pipe, the other end of the return pipe is connected to the steam channel, and the bottom end of the spiral heat exchange tube is connected to a recovery pipe that runs through the bottom of the annular base.

[0011] As a further technical solution of the utility model, the inner tube wall of the coil at the bottom is connected to a tubular protrusion, and the other end of the tubular protrusion passes through the side wall of the convex heat-conducting cover.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. In the utility model, the steam in the steam channel is convenient for preliminarily heating the chlorobenzene liquid in the annular bottom cover, and the pump body is convenient for extracting the chlorobenzene liquid in the annular bottom cover into the annular shell, so that the chlorobenzene liquid flows down along the inner wall of the annular top cover through a plurality of drainage pipes and falls into the annular bottom cover again. Such a cycle is convenient for the steam heat to fully heat the chlorobenzene liquid, which is beneficial to improve the drying efficiency.

[0014] 2. In the utility model, the condensed water formed in the steam channel is conveniently collected through the annular base, and the chlorobenzene liquid in the annular bottom cover will flow along multiple coils during the extraction process, so as to facilitate heat exchange with the condensed water, and conveniently use the heat of the condensed water to preheat the extracted chlorobenzene liquid, thereby making full use of the heat and improving the heat utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a chlorobenzene drying device of the utility model;

[0016] Figure 2It is a three-dimensional diagram of a convex heat preservation chamber in a chlorobenzene drying device of the utility model;

[0017] Figure 3 It is a three-dimensional diagram of a convex heat-conducting cover in a chlorobenzene drying device of the utility model;

[0018] Figure 4 The utility model is a three-dimensional diagram of a plurality of coil connection parts in a chlorobenzene drying device.

[0019] In the figure: 1, convex insulation chamber; 101, annular base; 102, cylinder; 2, convex heat-conducting cover; 201, annular bottom cover; 202, annular top cover; 3, steam inlet pipe; 4, negative pressure pipe; 5, coil; 6, branch pipe; 7, liquid extraction pipe; 8, pump body; 9, annular shell; 10, drainage pipe; 11, liquid delivery pipe; 12, faucet; 13, transparent viewport; 14, liquid outlet; 15, liquid inlet pipe; 16, spiral heat exchange tube; 17, reflux pipe; 18, recovery pipe; 19, tubular protrusion. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-4 As shown, a chlorobenzene drying device comprises a convex heat-insulating chamber 1 and a convex heat-conducting cover 2 installed in the convex heat-insulating chamber 1, the convex heat-insulating chamber 1 comprises an annular base 101 and a cylinder 102, the cylinder 102 is connected to the annular base 101, the convex heat-conducting cover 2 comprises an annular bottom cover 201 and an annular top cover 202, the annular bottom cover 201 is fixedly installed on the inner bottom of the annular base 101, the bottom of the annular top cover 202 is connected to the top of the annular bottom cover 201, and the top of the annular top cover 202 is connected to the inner top of the cylinder 102, the inner cavity of the annular bottom cover 201 is used to contain chlorobenzene liquid, the top of the annular bottom cover 201 is connected to a liquid inlet pipe 15 that passes through the top of the annular base 101, a steam channel is formed between the convex heat-insulating chamber 1 and the convex heat-conducting cover 2, and the steam channel is connected to a steam inlet pipe 3.

[0022] A plurality of coils 5 are sequentially mounted on the outer wall of the bottom end of the convex heat-conducting cover 2, and a branch pipe 6 is connected between the plurality of coils 5. The bottom coil 5 is connected to the inside of the convex heat-conducting cover 2. In this embodiment, the inner tube wall of the bottom coil 5 is connected to a tubular protrusion 19, and the other end of the tubular protrusion 19 passes through the side wall of the convex heat-conducting cover 2. The top coil 5 is connected to a liquid extraction pipe 7. A pump body 8 connected to the liquid extraction pipe 7 is installed on the outside of the convex heat-insulating cavity 1, so as to facilitate the extraction of chlorobenzene liquid from the inner cavity of the annular bottom cover 201. The steam in the steam channel forms condensed water after being cooled, and the heat of the condensed water is conducted by the coil 5, so as to facilitate the preheating of the extracted chlorobenzene liquid.

[0023] An annular shell 9 is installed at the inner top of the convex heat-insulating chamber 1, and a plurality of drainage pipes 10 corresponding to the inner wall of the convex heat-conducting cover 2 are connected at the side wall of the bottom end of the annular shell 9. The output end of the pump body 8 is connected with a liquid delivery pipe 11 extending into the annular shell 9, so that the chlorobenzene liquid to be extracted flows down along the inner wall of the annular top cover 202 through the plurality of drainage pipes 11 to achieve sufficient heating. The convex heat-conducting cover 2 is connected with a negative pressure pipe 4 near the top position to facilitate the extraction of water evaporated by heating in the chlorobenzene liquid.

[0024] A spiral heat exchange tube 16 is provided in the annular bottom cover 201, and a reflux pipe 17 is connected to the top end of the spiral heat exchange tube 16, and the other end of the reflux pipe 17 is connected to the steam channel. The discharged steam heats the chlorobenzene liquid in the annular bottom cover 201, so as to make full use of the heat. The bottom end of the spiral heat exchange tube 16 is connected to a recovery pipe 18 that runs through the bottom of the annular base 101, so as to facilitate the discharge of steam after sufficient heat exchange and part of the condensed water formed during the steam heat exchange process. The discharged condensed water is collected and utilized, and can be used as a steam generation source. A faucet 12 is installed on the side wall of the annular base 101 near the bottom end, and a transparent viewport 13 is installed on the outer side wall of the annular base 101. A liquid outlet 14 is installed at the bottom of the annular base 101, and the annular bottom cover 201 covers the liquid outlet 14, so as to facilitate the discharge of the dried chlorobenzene.

[0025] The working principle of the utility model is as follows: the chlorobenzene liquid to be dried is added into the inner cavity of the annular bottom cover 201 through the liquid inlet pipe 15, and the steam is introduced into the steam channel by the steam inlet pipe 3 to realize heating. During the heating process, the condensed water formed by the cooling of the steam is concentrated in the annular base 101, and the pump body 8 is started to extract the chlorobenzene liquid in the annular bottom cover 201. The extracted chlorobenzene liquid flows along the multiple coils 5 to absorb the heat in the condensed water to realize preheating. The preheated chlorobenzene liquid is transported to the annular shell 9, and the chlorobenzene liquid is distributed and flows down along the inner wall of the annular top cover 202 through the multiple drainage pipes 10, and finally falls into the annular bottom cover 201 again. In this cycle, the steam heat fully heats the chlorobenzene liquid, and the water evaporated by heating in the chlorobenzene liquid can be extracted in cooperation with the negative pressure pipe 4, so as to realize the drying treatment of chlorobenzene.

[0026] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A chlorobenzene drying device, comprising a convex heat-insulating chamber (1) and a convex heat-conducting cover (2) installed in the convex heat-insulating chamber (1), characterized in that: A steam channel is formed between the convex heat-insulating chamber (1) and the convex heat-conducting cover (2), and the steam channel is connected to a steam inlet pipe (3). The convex heat-conducting cover (2) is connected to a negative pressure pipe (4) near the top end. A plurality of coils (5) are sequentially mounted on the outer wall of the bottom end of the convex heat-conducting cover (2). A branch pipe (6) is connected between the plurality of coils (5). The coils (5) at the bottom end are connected to the inside of the convex heat-conducting cover (2). The coils (5) at the top end are connected to a liquid extraction pipe (7). A pump body (8) connected to the liquid extraction pipe (7) is installed on the outside of the convex heat-insulating chamber (1). An annular shell (9) is installed at the inner top end of the convex heat-insulating chamber (1). The bottom side wall of the annular shell (9) is connected to a plurality of drainage pipes (10) corresponding to the inner wall of the convex heat-conducting cover (2). The output end of the pump body (8) is connected to a liquid delivery pipe (11) extending into the annular shell (9).

2. A chlorobenzene drying device according to claim 1, characterized in that: The convex heat-insulating chamber (1) comprises an annular base (101) and a cylinder (102); the cylinder (102) is connected to the annular base (101); a faucet (12) is installed on the side wall of the annular base (101) near the bottom end; and a transparent viewport (13) is installed on the outer side wall of the annular base (101).

3. A chlorobenzene drying device according to claim 2, characterized in that, The convex heat-conducting cover (2) comprises an annular bottom cover (201) and an annular top cover (202); the annular bottom cover (201) is fixedly mounted on the inner bottom of the annular base (101); the bottom of the annular top cover (202) is connected to the top of the annular bottom cover (201); and the top of the annular top cover (202) is connected to the inner top of the cylinder (102); a liquid outlet (14) is mounted on the bottom of the annular base (101); and the annular bottom cover (201) is arranged to cover the liquid outlet (14).

4. A chlorobenzene drying device according to claim 3, characterized in that: The inner cavity of the annular bottom cover (201) is used to contain chlorinated benzene liquid, and the top of the annular bottom cover (201) is connected to a liquid inlet pipe (15) that passes through the top of the annular base (101).

5. A chlorobenzene drying device according to claim 3, characterized in that: A spiral heat exchange tube (16) is arranged in the annular bottom cover (201); the top end of the spiral heat exchange tube (16) is connected to a return tube (17); the other end of the return tube (17) is connected to a steam channel; the bottom end of the spiral heat exchange tube (16) is connected to a recovery tube (18) that passes through the bottom of the annular base (101).

6. A chlorobenzene drying device according to claim 1, characterized in that: The inner tube wall of the coil (5) at the bottom end is connected to a tubular protrusion (19), and the other end of the tubular protrusion (19) penetrates the side wall of the convex heat-conducting cover (2).

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