Industrial hydrochloric acid purification device

Abstract

The utility model discloses an industrial hydrochloric acid purification device which comprises a pretreatment unit, a distillation unit, a condensation unit and an absorption unit which are sequentially connected, and a raw material inlet and a waste gas discharge outlet are formed in the top of the pretreatment unit; at least two stages of tower plates are arranged in the distillation unit, the bottom is connected with an electric heating device, and the pretreatment unit is communicated with the distillation unit through a liquid pump; the condensing unit comprises a spiral tube type condenser and an external cooling medium circulating system; the absorption unit is filled with a ceramic filler layer, the top is provided with a tail gas discharge port, and the bottom is provided with a finished hydrochloric acid outlet; the electric heating device provided by the distillation unit is provided with the PID temperature control module, so that the heating temperature can be accurately regulated and controlled, the problem that effective components of hydrochloric acid are decomposed due to non-uniform heating of a traditional device is effectively avoided, the purity of hydrochloric acid is improved, and a circulating reflux system is arranged, so that circulating purification and accurate regulation and control of materials are realized; the matching degree among multiple stages of treatment units is greatly improved, and the purification efficiency and the overall production capacity of industrial hydrochloric acid are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrochloric acid purification equipment, specifically to an industrial hydrochloric acid purification equipment. Background Technology

[0002] Industrial hydrochloric acid has a wide range of applications in many fields such as chemical industry, metallurgy, and pharmaceuticals. However, industrial hydrochloric acid usually contains a variety of impurities, such as metal ions, organic matter and insoluble particles. These impurities can seriously affect the performance of hydrochloric acid in high-end applications. Therefore, it is essential to purify industrial hydrochloric acid.

[0003] Currently, common methods for purifying industrial hydrochloric acid mainly rely on techniques such as distillation, extraction, and adsorption, with distillation being the most widely used. However, existing industrial hydrochloric acid purification equipment has many drawbacks. During the heating process in traditional distillation units, problems such as unreasonable heating element layout and uneven heat transfer lead to uneven heating, making the effective components in the hydrochloric acid prone to decomposition at high temperatures. This not only reduces the purity of the hydrochloric acid but also wastes resources and increases production costs.

[0004] Furthermore, existing equipment has significant shortcomings in the coordination of multi-stage processing units. There is a lack of effective coordination mechanisms for material transfer and process parameter coordination among the pretreatment, distillation, condensation, and absorption units. Poor coordination between units prevents the formation of an efficient continuous production process, severely impacting the purification efficiency and overall production capacity of industrial hydrochloric acid. Utility Model Content

[0005] (I) Technical Issues

[0006] This invention provides an industrial hydrochloric acid purification device that solves the problems of uneven heating leading to decomposition of effective components and poor coordination between multi-stage processing units affecting purification efficiency in traditional devices.

[0007] (II) Technical Content

[0008] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: an industrial hydrochloric acid purification device, comprising a pretreatment unit, a distillation unit, a condensation unit, and an absorption unit connected in sequence. The pretreatment unit is provided with a raw material inlet and a waste gas outlet at the top, and a pretreatment liquid outlet at the bottom. The distillation unit is provided with at least two stages of trays, and an electric heating device is connected to the bottom. The pretreatment unit and the distillation unit are connected by a liquid pump. The condensation unit includes a spiral tube condenser and an external cooling medium circulation system. The absorption unit is filled with a ceramic packing layer, and is provided with a tail gas outlet at the top and a finished hydrochloric acid outlet at the bottom. The units are connected by corrosion-resistant pipes, and the inner wall of the pipes is coated with polytetrafluoroethylene.

[0009] Furthermore, the pretreatment unit is equipped with a ceramic filter membrane with a pore size of 0.1-0.5μm, and an ultrasonic oscillator is fixed on the outside of the pretreatment unit and below the ceramic filter membrane.

[0010] Furthermore, the electric heating device is equipped with a PID temperature control module, with a temperature control accuracy of ±1℃ and a heating temperature range of 80-120℃.

[0011] Furthermore, the external cooling medium circulation system uses an aqueous solution of ethylene glycol as the cooling medium, with a circulation flow rate of 2-5 m / s.

[0012] Furthermore, the diameter of the corrosion-resistant pipe is DN50-DN150, and the pipe connection adopts a flange sealing structure and is equipped with a rubber sealing ring.

[0013] Furthermore, it also includes a recirculation system, which connects the bottom of the absorption unit to the top of the pretreatment unit via a pipeline. A circulation pump, a flow control valve, and an online concentration monitor are sequentially connected to the pipeline.

[0014] (III) Technical Effects

[0015] The advantages of this utility model compared with the prior art are as follows:

[0016] 1. Uniform heating reduces component decomposition: The electric heating device in the distillation unit is equipped with a PID temperature control module with a temperature control accuracy of ±1℃ and a heating temperature range of 80-120℃. It can precisely control the heating temperature, effectively avoiding the problem of uneven heating in traditional devices that leads to the decomposition of hydrochloric acid's effective components, thereby improving the purity of hydrochloric acid and reducing resource waste and production costs.

[0017] 2. Optimize the coordination of multi-stage processing units to improve purification efficiency: The units are connected by corrosion-resistant pipes with PTFE coating on the inner wall of the pipes to reduce material loss and contamination during material transportation; at the same time, a circulation reflux system is set up to connect the bottom of the absorption unit and the top of the pretreatment unit, equipped with a circulation pump, flow control valve and online concentration monitor to realize the circulation purification and precise control of materials, greatly improve the coordination between multi-stage processing units, and improve the purification efficiency and overall production capacity of industrial hydrochloric acid.

[0018] 3. High-efficiency pretreatment: The pretreatment unit is equipped with a ceramic filter membrane with a pore size of 0.1-0.5μm and an ultrasonic oscillator fixed on the outside, which can effectively remove impurities. The ultrasonic oscillation can also prevent the filter membrane from clogging, improve the pretreatment effect, and provide a good foundation for subsequent purification processes. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an industrial hydrochloric acid purification device according to this utility model. Figure 1 .

[0020] Figure 2 This is a three-dimensional structural diagram of an industrial hydrochloric acid purification device according to this utility model. Figure 2 .

[0021] Figure 3 This is a three-dimensional structural diagram of an industrial hydrochloric acid purification device according to this utility model. Figure 3 .

[0022] Figure 4 This is a schematic diagram of the main structure of an industrial hydrochloric acid purification device according to this utility model.

[0023] Figure 5 This is a left-side structural schematic diagram of an industrial hydrochloric acid purification device according to this utility model.

[0024] Figure 6 This is a top view schematic diagram of an industrial hydrochloric acid purification device according to this utility model.

[0025] Figure 7 This is a cross-sectional structural schematic diagram of an industrial hydrochloric acid purification device according to this utility model.

[0026] As shown in the figure: 1. Pretreatment unit; 2. Distillation unit; 3. Condensation unit; 4. Absorption unit; 5. Corrosion-resistant pipeline; 6. Liquid pump; 101. Raw material inlet; 102. Exhaust gas outlet; 103. Pretreatment liquid outlet; 201. Tray; 202. Electric heating device; 203. PID temperature control module; 301. Spiral tube condenser; 401. Ceramic packing layer; 402. Tail gas outlet; 403. Finished hydrochloric acid outlet; 502. Flange sealing structure; 601. Flow control valve; 602. Online concentration monitor; 603. Circulation pump. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] Combined with appendix Figure 1 To be continued Figure 7 An industrial hydrochloric acid purification device includes a pretreatment unit 1, a distillation unit 2, a condensation unit 3, and an absorption unit 4 connected in sequence. The pretreatment unit 1 has a raw material inlet 101 and a waste gas outlet 102 at the top, and a pretreatment liquid outlet 103 at the bottom. The distillation unit 2 has at least two stages of trays 201 and an electric heating device 202 connected to the bottom. The pretreatment unit 1 and the distillation unit 2 are connected by a liquid pump 6. The condensation unit 3 includes a spiral tube condenser 301 and an external cooling medium circulation system. The absorption unit 4 is filled with a ceramic packing layer 401, has a tail gas outlet 402 at the top, and a finished hydrochloric acid outlet 403 at the bottom. The units are connected by corrosion-resistant pipes 5, and the inner wall of the pipes is coated with polytetrafluoroethylene.

[0031] The pretreatment unit 1 contains a ceramic filter membrane 104 with a pore size of 0.1-0.5 μm, and an ultrasonic oscillator 105 is fixed outside the pretreatment unit 1 and below the ceramic filter membrane 104. The electric heating device 202 is equipped with a PID temperature control module 203, with a temperature control accuracy of ±1℃ and a heating temperature range of 80-120℃. The external cooling medium circulation system uses ethylene glycol aqueous solution as the cooling medium, with a circulation flow rate of 2-5 m / s. The corrosion-resistant pipe 5 has a diameter of DN50-DN150, and the pipe connection adopts a flange sealing structure 502 with a rubber sealing ring.

[0032] This utility model discloses an industrial hydrochloric acid purification device, which also includes a circulation reflux system. The circulation reflux system is connected to the bottom of the absorption unit 4 and the top of the pretreatment unit 1 through a pipeline. A circulation pump 603, a flow control valve 601, and an online concentration monitor 602 are sequentially connected to the pipeline.

[0033] The working principle of this utility model of an industrial hydrochloric acid purification device is as follows: the industrial hydrochloric acid raw material is pretreated by a ceramic filter membrane 104 and an ultrasonic oscillator 105 to remove impurities; the temperature is precisely controlled by an electric heating device 202 for distillation, and gas-liquid separation is achieved by each tray 201; the vapor is condensed into liquid by a spiral tube condenser 301 and an external cooling medium circulation system; finally, it is further purified in an absorption unit 4 filled with a ceramic packing layer 401, and the circulation reflux system realizes the material circulation purification. All components work together to complete the hydrochloric acid purification.

[0034] The working process of this industrial hydrochloric acid purification device is as follows:

[0035] 1. Raw Material Pretreatment: Industrial hydrochloric acid raw material enters pretreatment unit 1 through raw material inlet 101. The raw material is filtered by a ceramic filter membrane 104 with a pore size of 0.1-0.5 μm, removing insoluble particles and other impurities. Simultaneously, an ultrasonic vibrator 105 located below the ceramic filter membrane 104 on the outside of pretreatment unit 1 operates to prevent membrane clogging and ensure filtration efficiency. Pretreated waste gas is discharged from waste gas outlet 102, and pretreated liquid flows out from pretreated liquid outlet 103.

[0036] 2. Distillation: The pretreated liquid is pumped by the liquid pump 6 and transported to the distillation unit 2 via the corrosion-resistant pipeline 5. The distillation unit 2 is equipped with at least two stages of trays 201. The electric heating device 202 at the bottom, under the control of the PID temperature control module 203, precisely controls the temperature at 80-120℃, so that water and impurities in the hydrochloric acid evaporate and separate at different temperatures. The gas and liquid undergo multiple mass transfers on the trays 201 to achieve efficient separation.

[0037] 3. Condensation: The steam generated by distillation enters the condensation unit 3 through the corrosion-resistant pipe 5. In the spiral tube condenser 301, the external cooling medium circulation system delivers ethylene glycol aqueous solution as the cooling medium at a flow rate of 2-5 m / s to cool the steam and condense it into a liquid state.

[0038] 4. Absorption and Finished Product Collection: The condensed liquid hydrochloric acid enters the absorption unit 4 and is further purified by the ceramic packing layer 401. The purified exhaust gas is discharged from the exhaust outlet 402, and the finished hydrochloric acid is collected from the finished hydrochloric acid outlet 403 at the bottom.

[0039] 5. Circulation and Recirculation: The circulation and recirculation system connects the bottom of the absorption unit 4 to the top of the pretreatment unit 1 through a pipeline. The online concentration monitor 602 on the pipeline monitors the hydrochloric acid concentration in real time. When the concentration does not reach the expected level, the circulation pump 603 starts. Under the regulation of the flow control valve 601, part of the finished hydrochloric acid is transported back to the pretreatment unit 1 for further purification, realizing the recycling of materials and improving the purity of hydrochloric acid.

[0040] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An industrial hydrochloric acid purification device, characterized in that, The system includes a pretreatment unit (1), a distillation unit (2), a condensation unit (3), and an absorption unit (4) connected in sequence. The pretreatment unit (1) has a raw material inlet (101) and a waste gas outlet (102) at the top and a pretreatment liquid outlet (103) at the bottom. The distillation unit (2) has at least two stages of trays (201) and an electric heating device (202) connected to the bottom. The pretreatment unit (1) and the distillation unit (2) are connected by a liquid pump (6). The condensation unit (3) includes a spiral tube condenser (301) and an external cooling medium circulation system. The absorption unit (4) is filled with a ceramic packing layer (401), has a tail gas outlet (402) at the top, and a finished hydrochloric acid outlet (403) at the bottom. The units are connected by corrosion-resistant pipes (5), and the inner wall of the pipes is coated with polytetrafluoroethylene.

2. The industrial hydrochloric acid purification apparatus according to claim 1, characterized in that, The pretreatment unit (1) is equipped with a ceramic filter membrane (104) with a pore size of 0.1-0.5μm.

3. The industrial hydrochloric acid purification apparatus according to claim 2, characterized in that, An ultrasonic oscillator (105) is fixed outside the pretreatment unit (1) and below the ceramic filter membrane (104).

4. The industrial hydrochloric acid purification apparatus according to claim 1, characterized in that, The electric heating device (202) is equipped with a PID temperature control module (203), with a temperature control accuracy of ±1℃ and a heating temperature range of 80-120℃.

5. An industrial hydrochloric acid purification apparatus according to claim 1, characterized in that, The external cooling medium circulation system uses ethylene glycol aqueous solution as the cooling medium, with a circulation flow rate of 2-5 m / s.

6. An industrial hydrochloric acid purification apparatus according to claim 1, characterized in that, The corrosion-resistant pipe (5) has a diameter of DN50-DN150, and the pipe connection adopts a flange sealing structure (502) and is equipped with a rubber sealing ring.

7. An industrial hydrochloric acid purification apparatus according to claim 1, characterized in that, It also includes a circulation reflux system, which connects the bottom of the absorption unit (4) and the top of the pretreatment unit (1) through a pipeline. A circulation pump (603), a flow control valve (601) and an online concentration monitor (602) are connected in sequence on the pipeline.

Images