CN216472234U

CN216472234U - Hydrogen chloride synthetic furnace

Info

Publication number: CN216472234U
Application number: CN202122340111.5U
Authority: CN
Inventors: 宋旭东; 郭婷; 高磊; 罗莎; 边伟康
Original assignee: Inner Mongolia Erdos Electric Power Metallurgy Group Co Ltd
Current assignee: Inner Mongolia Erdos Electric Power Metallurgy Group Co Ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-05-10
Anticipated expiration: 2031-09-26

Abstract

The utility model relates to the technical field of chemical equipment, in particular to a hydrogen chloride synthesis furnace, which comprises a graphite synthesis furnace and a rigid cylinder body arranged outside the graphite synthesis furnace, wherein a jacket is formed between the graphite synthesis furnace and the rigid cylinder body, and a return pipe communicated with the jacket is arranged on one side of the rigid cylinder body; an opening is formed in the upper portion of the return pipe, a heating pipe is introduced into the opening, the heating pipe extends downwards to the bottom of the return pipe in the return pipe, and steam is introduced into the heating pipe; the top of the rigid cylinder body is connected with a steam pipe. The utility model effectively reduces the time for generating steam after starting the furnace, and can generate usable steam about 1 hour after starting the furnace, thereby improving the utilization rate of the steam; meanwhile, the temperature of the wall of the synthesis furnace is increased when the furnace is started, so that the yield of hydrochloric acid is reduced, and compared with the state without preheating, the hydrochloric acid content is reduced by about 75%.

Description

Hydrogen chloride synthetic furnace

Technical Field

The utility model relates to the technical field of chemical equipment, in particular to a hydrogen chloride synthesis furnace.

Background

The chlorine and hydrogen are mixed and then are combusted in the synthesis furnace to carry out synthesis reaction, a large amount of heat is released during the reaction, the temperature of the central area of combustion flame reaches more than 2500 ℃, the temperature of the generated hydrogen chloride gas is more than 2000 ℃, the heat is taken away by cooling water entering a jacket, hot water at 90-100 ℃ or low-pressure steam with the pressure of 0.2-0.3MPa is generated and then is further utilized, in the continuous circulating process, the high-temperature heat generated by the synthesis reaction is taken away by the cooling water, the reaction is promoted to move towards the direction beneficial to generating the hydrogen chloride, and the use safety of the synthesis furnace body is ensured.

When the furnace is started, the temperature of cooling water in the jacket water tank is generally the same as the ambient temperature, after ignition, gradient temperature rise is gradually carried out by means of heat generated by combustion of hydrogen and chlorine in the synthetic furnace, steam is generated when the jacket cooling water is heated, and the cold-hot circulation and the inlet-outlet balance process of the jacket cooling water can be effectively established in the synthetic furnace when the pressure reaches 0.2 Mpa. Although there is no technical obstacle to the gradual heating and temperature rise of cooling water in a jacket water tank of a synthesis furnace to generate steam, the problems of long temperature rise time and over-fast cold-heat conversion of a furnace wall during the start of the furnace are not solved.

For example, patent CN201093469 discloses a byproduct steam device for a hydrogen chloride synthesis furnace, which comprises a graphite synthesis furnace, a hydrogen inlet, a chlorine inlet, a hydrogen chloride outlet, a liquid level control device, and a pressure control device, wherein a jacket is arranged outside the graphite synthesis furnace, a return pipe communicated with the jacket is arranged outside the jacket, the return pipe is connected with a water inlet pipe, a metering device and a liquid level control device are arranged on the water inlet pipe, and a pressure control device is arranged at the top of the jacket. The device utilizes the heat generated by the combustion of the synthesis furnace to produce byproduct steam, thereby reducing the waste of energy. However, the jacket water in the device can produce steam only after 5 hours of furnace starting, and the temperature rise time of the furnace starting is long.

Therefore, a hydrogen chloride synthesis furnace needs to be designed, jacket water in the synthesis furnace is preheated before starting, the temperature rise time after starting the furnace is effectively reduced, and the amount of byproduct steam is increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a hydrogen chloride synthesis furnace, which adopts the following technical scheme:

a hydrogen chloride synthetic furnace comprises a graphite synthetic furnace and a rigid cylinder arranged outside the graphite synthetic furnace, wherein a jacket is formed between the graphite synthetic furnace and the rigid cylinder, and a return pipe communicated with the jacket is arranged on one side of the rigid cylinder; an opening is formed in the upper portion of the return pipe, a heating pipe is introduced into the opening, the heating pipe extends downwards in the return pipe to the bottom of the return pipe, and steam is introduced into the heating pipe; the top of the rigid cylinder body is connected with a steam pipe.

Furthermore, the tail end of the heating pipe is plugged, and a plurality of through holes are formed in the outer wall of the heating pipe in the return pipe.

Further, the diameter of the through hole is 8-12 mm.

Further, the heating pipe is a cylindrical heating pipe, and the diameter of the heating pipe is 50 mm.

Further, a first regulating valve is arranged at the inlet of the heating pipe.

Further, the bottom of the graphite synthesis furnace is provided with a burner, the burner is provided with a chlorine inlet and a hydrogen inlet, and the top of the graphite synthesis furnace is provided with a hydrogen chloride outlet.

Furthermore, one side of the bottom of the rigid cylinder body is connected with a pure water pipe, and a second regulating valve is arranged between the rigid cylinder body and the pure water pipe.

Further, a pressure detection device and a third regulating valve are sequentially arranged on the steam pipe.

The utility model has the beneficial effects that:

1. the heating pipe is arranged in the return pipe of the hydrogen chloride synthesis furnace, steam is introduced into the heating pipe to preheat the cooling water in the jacket before starting the furnace, and the synthesis furnace is started when the water temperature of the cooling water reaches 80 ℃.

2. The cooling water in the jacket is preheated before the furnace is started, so that the temperature of the wall of the synthesis furnace is increased when the furnace is started, the yield of hydrochloric acid is further reduced, and compared with the non-preheated state, the hydrochloric acid content is reduced by about 75%.

Drawings

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

Description of reference numerals:

1-graphite synthetic furnace, 2-rigid cylinder, 3-jacket, 4-reflux pipe, 5-heating pipe, 6-steam pipe, 7-first regulating valve, 8-burner, 9-chlorine inlet, 10-hydrogen inlet, 11-hydrogen chloride outlet, 12-pure water pipe, 13-second regulating valve, 14-pressure detecting device and 15-third regulating valve.

Detailed Description

The technical solutions of the present invention will be described in detail with reference to the accompanying drawings, and it is obvious that the described embodiments are not all embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any inventive work belong to the protection scope of the present invention. It is to be noted that the terms "center", "upper", "lower", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, the present invention provides a hydrogen chloride synthesis furnace, comprising a graphite synthesis furnace 1 and a rigid cylinder 2 arranged outside the graphite synthesis furnace, wherein a jacket 3 is formed between the graphite synthesis furnace 1 and the rigid cylinder 2, and a return pipe 4 communicated with the jacket 3 is arranged on one side of the rigid cylinder 2; an opening is formed in the upper part of the return pipe 4, a heating pipe 5 is introduced into the opening, the heating pipe 5 extends downwards in the return pipe 4 to the bottom of the return pipe 4, and steam is introduced into the heating pipe 5; the top of the rigid cylinder body 2 is connected with a steam pipe 6.

Preferably, the tail end of the heating pipe 5 is plugged, a plurality of through holes are formed in the outer wall of the heating pipe 5 in the return pipe 4, and the diameter of each through hole is 8-12mm, preferably 10 mm; before the furnace is started, steam with the pressure of 0.3MPa is introduced into the heating pipe 5, so that cooling water in the heating pipe is emptied, and the cooling water in the jacket 3 is heated.

Preferably, the heating pipe 5 is a cylindrical heating pipe, and the diameter of the heating pipe 5 is 50 mm.

Preferably, a first regulating valve 7 is arranged at the inlet of the heating pipe 5, and when the temperature of the cooling water in the jacket 3 reaches 80 ℃, the first regulating valve 7 is closed to stop preheating.

Further, a combustor 8 is arranged at the bottom of the graphite synthesis furnace 1, a chlorine inlet 9 and a hydrogen inlet 10 are arranged on the combustor 8, and a hydrogen chloride outlet 11 is arranged at the top of the graphite synthesis furnace 1.

Preferably, a deionized water pipe 12 is connected to the bottom side of the rigid cylinder 2, and a second regulating valve 13 is provided between the rigid cylinder 2 and the deionized water pipe 12.

Preferably, the steam pipe 6 is provided with a pressure detection device 14 and a third regulating valve 15, the hydrogen chloride synthesis reaction is carried out after the furnace is started, steam is generated in the jacket 3, and when the pressure detection device 14 detects that the steam pressure in the jacket 3 reaches 0.2MPa, the third regulating valve 15 is opened, and the available steam is conveyed to the steam utilization equipment.

Although the present invention has been described in detail with reference to examples, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the present invention.

Claims

1. A hydrogen chloride synthetic furnace comprises a graphite synthetic furnace and a rigid cylinder arranged outside the graphite synthetic furnace, wherein a jacket is formed between the graphite synthetic furnace and the rigid cylinder, and a return pipe communicated with the jacket is arranged on one side of the rigid cylinder; the method is characterized in that: an opening is formed in the upper portion of the return pipe, a heating pipe is introduced into the opening, the heating pipe extends downwards in the return pipe to the bottom of the return pipe, and steam is introduced into the heating pipe; the top of the rigid cylinder body is connected with a steam pipe.

2. The hydrogen chloride synthesis furnace according to claim 1, characterized in that: the tail end of the heating pipe is plugged, and a plurality of through holes are formed in the outer wall of the heating pipe, which is positioned in the return pipe.

3. The hydrogen chloride synthesis furnace of claim 2, wherein: the diameter of the through hole is 8-12 mm.

4. The hydrogen chloride synthesis furnace according to claim 1, characterized in that: the heating pipe is cylindrical, and the diameter of heating pipe is 50 mm.

5. The hydrogen chloride synthesis furnace according to claim 1, characterized in that: and a first regulating valve is arranged at the inlet of the heating pipe.

6. The hydrogen chloride synthesis furnace according to claim 1, characterized in that: the bottom of the graphite synthesis furnace is provided with a burner, the burner is provided with a chlorine inlet and a hydrogen inlet, and the top of the graphite synthesis furnace is provided with a hydrogen chloride outlet.

7. The hydrogen chloride synthesis furnace according to claim 1, characterized in that: one side of the bottom of the rigid cylinder body is connected with a pure water pipe, and a second regulating valve is arranged between the rigid cylinder body and the pure water pipe.

8. The hydrogen chloride synthesis furnace according to claim 1, characterized in that: and the steam pipe is sequentially provided with a pressure detection device and a third regulating valve.