Gas phase balancing device for concentrated acid storage tank of hydrogen chloride synthesis furnace
The design of the gas phase balance pipe and liquid seal tank solved the problem of hydrogen chloride gas volatilization in the concentrated acid storage tank, achieved stable operation of the device and cost savings, and avoided environmental pollution.
Patent Information
- Application Number
- CN202422653567.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-10-31
AI Technical Summary
During the hydrogen chloride synthesis process, the volatilization of hydrogen chloride gas in the concentrated acid storage tank is accelerated, resulting in unstable gas phase equilibrium, rapid consumption of the alkali sealing device, high production costs and serious environmental pollution.
A gas phase balance pipe is used to recover the volatilized hydrogen chloride gas to the falling film absorber to participate in the reaction, and a liquid seal tank is used to replace the alkali seal device. Combined with the hydrogen chloride cooler, a second production line is formed to achieve negative pressure pumping and cooling to avoid direct discharge.
It stabilizes the gas phase balance of the concentrated acid storage tank, reduces the consumption of the alkali sealing device, reduces environmental pollution and production costs, and improves production efficiency.
Smart Images
Figure CN223467640U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to chemical production technical field, concretely relates to a kind of hydrogen chloride synthesis furnace concentrated acid storage tank gas phase equilibrium device. BACKGROUND
[0002] In the current hydrogen chloride synthesis process of chemical industry, the main process is that the chlorine gas and hydrogen gas sent by electrolysis post respectively enter chlorine buffer tank, hydrogen buffer tank, hydrogen fire arrestor pressure stabilizer, and mixed combustion is generated hydrogen chloride gas at graphite synthesis furnace quartz lamp head according to scientific proportion (chlorine:hydrogen=1:1.05~1.1), and the by-product steam generated by synthesis furnace jacket is vented.Hydrogen chloride gas at the top of synthesis furnace is sent to downstream process after cooling and purity qualification, and the produced hydrogen chloride gas is absorbed by falling film absorber, tail gas absorber and hydraulic jet pump into liquid seal tank, inert gas is vented, and the produced concentrated hydrochloric acid is overflowed into concentrated acid storage tank.Industrial water is injected into tail gas absorber, and concentrated hydrochloric acid (concentration≥31%) is prepared by absorbing hydrogen chloride by falling film absorber and is entered into concentrated acid storage tank.
[0003] During the operation of the device, whether it is condensed acid produced after the cooling of hydrogen chloride gas or finished product hydrochloric acid produced in the acid production process, it needs to flow into the concentrated acid storage tank through the system gravity settlement, in order to ensure the gas phase equilibrium of the system and the concentrated acid storage tank, a venting pipe is usually installed at the top of the concentrated acid storage tank, and the inert gas is vented after absorbing hydrogen chloride by alkali sealing device, but in high temperature condition, the hydrogen chloride in the concentrated acid storage tank volatilizes faster with the increase of air temperature, which causes the alkali solution of the alkali sealing device to be consumed too fast, and the production cost to be increased;at the same time, the hydrogen chloride gas in the concentrated acid storage tank is directly discharged to the atmosphere without absorption due to the failure of the alkali sealing device, which causes serious environmental pollution and harms the health of on-site operators. UTILITY MODEL CONTENTS
[0004] The utility model provides a kind of hydrogen chloride synthesis furnace concentrated acid storage tank gas phase equilibrium device to solve the problem that concentrated acid storage tank volatilizes hydrogen chloride gas in the current hydrogen chloride production, makes device gas phase equilibrium unstable, alkali sealing device is not safe, and production cost is too high.
[0005] The technical scheme of the utility model is: a kind of hydrogen chloride synthesis furnace concentrated acid storage tank gas phase equilibrium device, including hydrogen chloride synthesis furnace, falling film absorber, tail gas absorber, hydraulic jet and concentrated acid storage tank connected in sequence, water supply pipeline is connected on hydraulic jet, and it further includes liquid seal tank and gas phase equilibrium pipe, liquid seal tank inlet is connected with hydraulic jet, liquid seal tank outlet is connected with concentrated acid storage tank, and gas phase equilibrium pipe connects concentrated acid storage tank with falling film absorber.
[0006] As a further improvement of the present invention, a water storage tank is provided at the input end of the water supply pipe, a water supply pump is provided on the water supply pipe, and the output end of the water supply pipe is also connected to the tail gas absorber.
[0007] As a further improvement of the present invention, a water supply pipe is also connected to the production storage tank.
[0008] As a further improvement of the present invention, the output port of the hydrogen chloride synthesis furnace is connected to a hydrogen chloride absorption pipe, which is provided with an absorption valve. The hydrogen chloride absorption pipe is connected to a hydrogen chloride cooler, and the output end of the hydrogen chloride cooler is connected to a concentrated acid storage tank for cooling the hydrogen chloride gas and sending it to subsequent production processes for use after reaching the temperature index.
[0009] The beneficial effects of the present invention are as follows: The present invention utilizes the negative pressure of the concentrated acid storage tank to transport the volatilized hydrogen chloride gas back to the falling film absorber through the gas phase balance pipe to continue participating in the reaction. Simultaneously, the present invention uses a liquid seal tank to replace the existing alkali seal device, preventing direct emission of hydrogen chloride gas due to failure of the alkali seal device. The present invention also utilizes a hydrogen chloride cooler to form a second production line, which operates alternately with the original production line, thereby improving production efficiency. The present invention has a simple structure and stable operation, effectively resolving the issues of unstable gas phase equilibrium in the concentrated acid storage tank and direct leakage of hydrogen chloride gas due to failure of the alkali seal device, which can endanger the factory working environment. This achieves the dual benefits of energy conservation and consumption reduction, as well as lowering operating costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is a schematic diagram of the structure of the utility model.
[0011] In the figure: 1-hydrogen chloride synthesis furnace, 2-falling film absorber, 3-tail gas absorber, 4-hydraulic ejector, 5-liquid seal tank, 6-hydrogen chloride cooler, 7-concentrated acid storage tank, 8-production storage tank, 9-gas phase balance pipe, 10-water feed pump, 11-concentrated acid pump, 12-vent pipe, 13-air supply valve, 14-absorption valve, 15-water feed pipe, 16-water feed pipeline, 17-hydrogen chloride absorption pipe. DETAILED DESCRIPTION
[0012] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementations.
[0013] like Figure 1 As shown, a gas phase balance device for a hydrogen chloride synthesis furnace and a concentrated acid storage tank comprises a hydrogen chloride synthesis furnace 1, a falling film absorber 2, a tail gas absorber 3, a hydraulic ejector 4 and a concentrated acid storage tank 7 connected in sequence, and a water supply pipe 16 is connected to the hydraulic ejector 4.
[0014] The device also comprises a liquid seal tank 5 and a gas phase balance pipe 9, the water inlet of the liquid seal tank 5 is connected with the hydraulic ejector 4, the water outlet of the liquid seal tank 5 is connected with the concentrated acid storage tank 7, and the gas phase balance pipe 9 connects the concentrated acid storage tank 7 with the falling film absorber 2.
[0015] The tail gas absorber and the hydraulic ejector are connected with a water supplement pipe 16, the other end of the water supplement pipe 16 is connected with the production storage tank 8, and the water supplement pipe 16 is provided with a water supplement pump 10.
[0016] The production storage tank 8 is also connected with a water supplement pipe 15.
[0017] The output of the hydrogen chloride synthesis furnace 1 is connected with a hydrogen chloride absorption pipe 17, the hydrogen chloride absorption pipe 17 is provided with an absorption valve 14, the hydrogen chloride absorption pipe 17 is connected with a hydrogen chloride cooler 6, the output end of the hydrogen chloride cooler 6 is connected with the concentrated acid storage tank 7, the hydrogen chloride cooler 6 cools the hydrogen chloride gas to produce condensed acid, and the condensed acid flows to the concentrated acid storage tank 7 through a bottom acid discharge pipe.
[0018] In use, after starting the hydrogen chloride synthesis furnace 1, the gas feeding valve 13 is opened, the absorption valve 14 is closed, the hydrogen chloride gas falling film absorber 2 and the tail gas absorber 3 are used for hydrogen chloride absorption, the water supplement pump 10 is started, the production water flows into the tail gas absorber 3, generates concentrated hydrochloric acid with the hydrogen chloride gas, and flows to the liquid seal tank 5 after passing through the hydraulic ejector 4, is discharged, and the inert gas (hydrogen and nitrogen carried by the raw material gas in the synthesis furnace combustion) is discharged, finally flows into the concentrated acid storage tank 7, the negative pressure is generated by the hydraulic ejector 4, the hydrogen chloride gas to be absorbed by the synthesis furnace can be pumped by the negative pressure, and the hydrogen chloride gas flows into the absorption system from bottom to top; after running for a period of time, the gas feeding valve 13 is closed, the absorption valve 14 is opened, the hydrogen chloride gas is cooled by the hydrogen chloride cooler 6, and then is transported to the concentrated acid storage tank 7, the above two production modes are alternately run, the hydraulic ejector 4 is prevented from being overheated to suspend the system, and the hydrogen chloride gas is prevented from being wasted. When the liquid level of the concentrated acid storage tank 7 is high, the vent pipe 12 at the top of the concentrated hydrochloric acid storage tank 7 can be opened to prevent explosion caused by excessive pressure, and the vent pipe 12 is opened when the concentrated acid pump 11 is started to load the vehicle to prevent the concentrated hydrochloric acid storage tank 7 from being deflated by the concentrated acid pump 11 during the loading process.
Claims
1. A gas phase equilibrium device for concentrated acid storage tank of hydrogen chloride synthesis furnace, comprising hydrogen chloride synthesis furnace (1), falling film absorber (2), tail gas absorber (3), hydraulic ejector (4) and concentrated acid storage tank (7) connected in sequence, the hydraulic ejector (4) is connected with the water supply pipeline (16), characterized in that: Also include liquid seal tank (5) and gas phase balance pipe (9), the liquid seal tank (5) water inlet is connected with hydraulic ejector (4), the liquid seal tank (5) water outlet is connected with concentrated acid storage tank (7), the gas phase balance pipe (9) is connected with concentrated acid storage tank (7) and falling film absorber (2). 2. The gas phase equilibrium device for the concentrated acid storage tank of a hydrogen chloride synthesis furnace according to claim 1, characterized in that: The input end of the water supplement pipeline (16) is provided with a production storage tank (8), a water supplement pump (10) is arranged on the water supplement pipeline (16), and the output end of the water supplement pipeline (16) is further connected to the tail gas absorber (3).
3. The gas phase equilibrium apparatus for the concentrated acid storage tank of a hydrogen chloride synthesis furnace according to claim 2, characterized in that: The production storage tank (8) is further connected with a water supplement pipe (15).
4. The gas phase equilibrium device for concentrated acid storage tank of hydrogen chloride synthesis furnace according to any one of claims 1-3, characterized in that: The output port of the hydrogen chloride synthesis furnace (1) is connected with a hydrogen chloride absorption pipe (17), the hydrogen chloride absorption pipe (17) is provided with an absorption valve (14), the hydrogen chloride absorption pipe (17) is connected to a hydrogen chloride cooler (6), and the output end of the hydrogen chloride cooler (6) is connected to the concentrated acid storage tank (7).