CN210374686U

CN210374686U - Condensing equipment in hydrogen fluoride production

Info

Publication number: CN210374686U
Application number: CN201921042591.3U
Authority: CN
Inventors: 于昌国; 肖飞; 彭国军; 王坤; 张强
Original assignee: Inner Mongolia Dongyue Jinfeng Fluorine Chemical Co Ltd
Current assignee: Inner Mongolia Dongyue Jinfeng Fluorine Chemical Co Ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-04-21
Anticipated expiration: 2029-07-05

Abstract

The utility model discloses a condensing equipment in hydrogen fluoride production, include the one-level condenser with reation kettle's gas outlet intercommunication, with the second grade condenser of one-level condenser below intercommunication, with the condensate holding vessel of second grade condenser below intercommunication to and the cooling tower of the coolant liquid circulation that communicates with the one-level condenser. Simultaneously, it is right the structure of one-level condenser carries out the improved design, utilizes one-level and second grade condenser, makes hydrogen fluoride condensation effectual, promotes hydrogen fluoride's condensation efficiency, carries out the circulation refrigeration to the coolant liquid through the refrigeration tower simultaneously, reduces the power consumption, practices thrift the cost to, set up the gas washing case at second grade condenser's blast pipe end, can absorb remaining a small amount of hydrogen fluoride gas, avoid hydrogen fluoride gas pollution environment. Therefore, the method has high use value and popularization value.

Description

Condensing equipment in hydrogen fluoride production

Technical Field

The utility model belongs to the technical field of hydrogen fluoride production facility technique and specifically relates to a condensing equipment in hydrogen fluoride production is related to.

Background

The hydrogen fluoride has extremely wide application in the aspects of industry, national defense and civilian use, and is a basic raw material in the organic fluorine industry. The method is mainly used for producing fluorine refrigerants, fluoroplastics, fluorine salts and the like. In the hydrogen fluoride production process, the gas generated by the chemical reaction is liquefied by using a condenser so as to be convenient for transportation and storage.

The hydrogen fluoride gas generated in the production process contains a small amount of water vapor, and the water vapor and the hydrogen fluoride gas are condensed into liquid together in the condensation process. The hydrogen fluoride gas containing water is highly corrosive and can damage the condenser tube. The existing hydrogen fluoride condensing device can not achieve the purpose of uniform condensation in the condensing process, so that hydrogen fluoride gas with water is accumulated at certain condensing tube parts in the condensing device for a long time, the condensing tube is corroded, the damage and the replacement of the condenser are accelerated, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a condensing equipment in hydrogen fluoride production mainly solves current hydrogen fluoride condensing equipment condensation inefficiency, and the condenser pipe is perishable, problem that manufacturing cost is high.

In order to achieve the above object, the utility model adopts the following technical scheme:

a condensing device in hydrogen fluoride production comprises a primary condenser communicated with an air outlet of a reaction kettle, a secondary condenser communicated with the lower part of the primary condenser, a condensate collecting tank communicated with the lower part of the secondary condenser, and a cooling tower communicated with the primary condenser and used for cooling liquid circulation; the primary condenser comprises a first shell, an air inlet arranged at the upper end of the first shell, a cooling liquid circulation cavity arranged at the lower part of the first shell, a plurality of spiral gas cooling channels which penetrate through the upper and lower bottom plates of the cooling liquid circulation cavity and are communicated with the secondary condenser, and a cooling liquid inlet and a cooling liquid outlet which are arranged on the outer wall of the first shell and are communicated with the cooling liquid circulation cavity; wherein, the air inlet is communicated with the air outlet of the reaction kettle, and the cooling liquid inlet and the cooling liquid outlet are communicated with the refrigeration tower.

Furthermore, the second-stage condenser comprises a second shell connected with the lower end of the first shell of the first-stage condenser, an electric condensation plate with a through hole and connected with the inner wall of the second shell, a liquid outlet arranged below the second shell, and an exhaust pipe arranged on the side wall of the second shell.

Furthermore, the other end of the exhaust pipe is also connected with a gas washing tank with a hydrogen fluoride absorbent.

Furthermore, the contact surfaces of the condensing device and the hydrogen fluoride gas body are covered with acid corrosion resistant materials which are polyethylene films.

Further, the hydrogen fluoride absorbent is calcium hydroxide solution.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model discloses a set up one-level and second grade condenser, make the hydrogen fluoride condensation effectual, promote the condensation efficiency of hydrogen fluoride, carry out the refrigeration that circulates to the coolant liquid through the cooling tower simultaneously, reduce the power consumption, practice thrift the cost to, set up the gas washing case at second grade condenser's blast pipe end, can absorb remaining a small amount of hydrogen fluoride gas, avoid hydrogen fluoride gas polluted environment.

(2) The utility model discloses a set up gas cooling channel into the heliciform, can increase the heat transfer time that hydrogen fluoride gas passes through gas cooling channel and coolant liquid, improve condensation efficiency.

(3) The utility model discloses a set up the polyethylene film, can strengthen the acid corrosion resistance nature of hydrogen fluoride condensation device, the life of extension condenser pipe practices thrift the cost.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is the schematic diagram of the sectional structure of the first-stage condenser and the second-stage condenser of the present invention.

Wherein, the names corresponding to the reference numbers are:

1-a first-stage condenser, 2-a second-stage condenser, 3-a condensate collecting tank, 4-a cooling tower, 5-a gas washing tank, 11-a first shell, 12-a gas inlet, 13-a cooling liquid circulating cavity, 14-a gas cooling channel, 15-a cooling liquid inlet, 16-a cooling liquid outlet, 21-a second shell, 22-an electric condensing plate with through holes, 23-a liquid outlet and 24-an exhaust pipe.

Detailed Description

The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.

Examples

As shown in fig. 1 and 2, the utility model discloses a condensing equipment in hydrogen fluoride production, include the one-level condenser 1 with reation kettle's gas outlet intercommunication, with the second grade condenser 2 of 1 below intercommunication of one-level condenser, with the condensate holding vessel 3 of 2 below intercommunications of second grade condenser to and the cooling tower 4 of the coolant liquid circulation of 1 intercommunication of one-level condenser. Liquid hydrogen fluoride is collected in the condensate collecting tank 3 after two-stage condensation, so that the storage and the transportation are convenient.

Hydrogen fluoride gas is firstly condensed in a primary condenser, wherein the primary condenser 1 comprises a first shell 11, an air inlet 12 arranged at the upper end of the first shell 11, a cooling liquid circulation cavity 13 arranged at the lower part of the first shell 11, a plurality of spiral gas cooling channels 14 which penetrate through the upper and lower bottom plates of the cooling liquid circulation cavity 13 and are communicated with a secondary condenser 2, and a cooling liquid inlet 15 and a cooling liquid outlet 16 which are arranged on the outer wall of the first shell 11 and are communicated with the cooling liquid circulation cavity 13; wherein, the air inlet 12 is communicated with the air outlet of the reaction kettle, and the cooling liquid inlet 15 and the cooling liquid outlet 16 are both communicated with the refrigeration tower 4. The gas cooling channel is set to be spiral, so that the heat exchange time of the hydrogen fluoride gas passing through the gas cooling channel and the cooling liquid can be prolonged, and the condensation efficiency is improved.

After passing through the first-stage condenser, a small amount of hydrogen fluoride gas is not cooled, and then is recooled by the second-stage condenser 2. The secondary condenser 2 comprises a second shell 21 connected with the lower end of the first shell 11 of the primary condenser 1, an electric condensation plate 22 with a through hole connected with the inner wall of the second shell 21, a liquid outlet 23 arranged below the second shell 21, and an exhaust pipe 24 arranged on the side wall of the second shell 21. Even after the two-stage cooling, a small amount of hydrogen fluoride remains in the gas, and therefore, it is necessary to perform a purification treatment of the discharged gas, and a hydrogen fluoride absorption treatment is performed by connecting a purge tank 5 with a hydrogen fluoride absorbent to the other end of the exhaust pipe 24. The hydrogen fluoride absorbent adopts calcium hydroxide solution. The exhaust pipe is made into an arch bridge form, so that the backflow of the hydrogen fluoride absorbent in the gas washing tank 5 can be avoided, and the condensed hydrogen fluoride is polluted.

Because the hydrogen fluoride gas can contain a small amount of water vapor, the hydrogen fluoride solution with water has stronger 1 corrosivity, so the condensing device needs to be subjected to acid-resistant and corrosion-resistant treatment, and the contact surface of the condensing device and the hydrogen fluoride gas body is covered with acid-resistant corrosion materials which are polyethylene films. Polyethylene films have better resistance to acid corrosion.

Through the design, the utility model discloses utilize one-level and second grade condenser, make the hydrogen fluoride condensation effectual, promote the condensation efficiency of hydrogen fluoride, circulate the refrigeration through the cooling tower to the coolant liquid simultaneously, reduce the power consumption, practice thrift the cost to, set up the gas washing case at second grade condenser's blast pipe end, can absorb remaining a small amount of hydrogen fluoride gas, avoid hydrogen fluoride gas polluted environment. Therefore, the method has high use value and popularization value.

The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.

Claims

1. A condensing device in hydrogen fluoride production is characterized by comprising a primary condenser (1) communicated with an air outlet of a reaction kettle, a secondary condenser (2) communicated with the lower part of the primary condenser (1), a condensate collecting tank (3) communicated with the lower part of the secondary condenser (2), and a cooling tower (4) communicated with the primary condenser (1) and used for cooling liquid circulation; the primary condenser (1) comprises a first shell (11), an air inlet (12) arranged at the upper end of the first shell (11), a cooling liquid circulating cavity (13) arranged at the lower part of the first shell (11), a plurality of spiral gas cooling channels (14) which penetrate through the upper and lower bottom plates of the cooling liquid circulating cavity (13) and are communicated with the secondary condenser (2), and a cooling liquid inlet (15) and a cooling liquid outlet (16) which are arranged on the outer wall of the first shell (11) and are communicated with the cooling liquid circulating cavity (13); wherein the air inlet (12) is communicated with an air outlet of the reaction kettle, and the cooling liquid inlet (15) and the cooling liquid outlet (16) are both communicated with the refrigeration tower (4).

2. A condensing unit in the production of hydrogen fluoride according to claim 1, characterized in that the secondary condenser (2) comprises a second shell (21) connected to the lower end of the first shell (11) of the primary condenser (1), an electric condensing plate (22) with through holes connected to the inner wall of the second shell (21), a liquid outlet (23) arranged below the second shell (21), and an exhaust pipe (24) arranged on the side wall of the second shell (21).

3. A condensation device in the production of hydrogen fluoride according to claim 2, characterized in that the other end of the exhaust pipe (24) is further connected with a gas washing tank (5) with a hydrogen fluoride absorbent.

4. A condensing unit in hydrogen fluoride production according to claim 3, wherein the contact surface of the condensing unit and the hydrogen fluoride gas is covered with an acid corrosion resistant material, and the acid corrosion resistant material is a polyethylene film.

5. A condensing unit in hydrogen fluoride production according to claim 4, characterized in that the hydrogen fluoride absorbent is calcium hydroxide solution.