Vertical hydrochloric acid recovery equipment

Abstract

The utility model provides vertical hydrochloric acid recovery equipment, which relates to the technical field of hydrochloric acid recovery and comprises a spray chamber, a filter chamber, a buffer chamber and a volatilization chamber which are sequentially distributed from top to bottom, the filtering chamber is provided with a filtering liquid inlet and a filtering liquid outlet, and filtering filler is arranged between the filtering liquid inlet and the filtering liquid outlet; the buffer chamber is provided with a buffer liquid inlet and a buffer liquid outlet; a volatile liquid phase space and a volatile gas phase space are distributed in the volatilization chamber from bottom to top; the volatile liquid phase space is connected with a volatile liquid inlet and a volatile liquid outlet; a heating piece for heating the interior of the volatile liquid phase space is arranged outside the volatile liquid phase space; the volatile gas phase space is connected with a volatile exhaust port; the volatile gas phase space and the buffer chamber can conduct heat; an air inlet head is arranged in the spraying chamber, and a spraying pipe is arranged above the air inlet head. The spraying chamber, the filtering chamber, the buffering chamber and the volatilizing chamber are integrated from top to bottom, so that the occupation of a transverse space is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydrochloric acid recovery technology, and in particular to a vertical hydrochloric acid recovery device. Background Technology

[0002] Hydrochloric acid is an aqueous solution of hydrogen chloride. It is a colorless and transparent liquid with a strong, pungent odor and is highly corrosive. Concentrated hydrochloric acid is extremely volatile, so when a container containing concentrated hydrochloric acid is opened, hydrogen chloride gas will evaporate and combine with water vapor in the air to produce small droplets of hydrochloric acid, causing acid mist to appear above the bottle opening. Contact with hydrochloric acid vapor or fumes can cause acute poisoning. Therefore, hydrochloric acid in wastewater must be recovered before being discharged.

[0003] The patent application with application number 202421013061.7 provides a low-energy-consumption hydrochloric acid recovery device, which is characterized by filtration and low energy consumption. However, the entire device includes multiple devices, resulting in a large lateral space occupation, which needs to be improved. Utility Model Content

[0004] In view of the above situation, this utility model provides a vertical hydrochloric acid recovery device, which aims to solve the technical problem that the existing device includes multiple devices and occupies a large amount of horizontal space.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a vertical hydrochloric acid recovery device, which includes a spray chamber, a filter chamber, a buffer chamber and a volatilization chamber arranged from top to bottom;

[0007] The filter chamber has a filter inlet and a filter outlet, and filter packing is placed between the filter inlet and the filter outlet.

[0008] The buffer chamber has a buffer inlet and a buffer outlet;

[0009] The evaporation chamber has a liquid phase space and a gas phase space distributed from bottom to top; the liquid phase space is connected to an evaporation inlet and an evaporation outlet; a heating element for heating its interior is installed outside the liquid phase space; the gas phase space is connected to an evaporation exhaust outlet; the gas phase space and the buffer chamber can conduct heat.

[0010] An air inlet is installed inside the spray chamber, and a spray pipe is installed above the air inlet.

[0011] The filter inlet, filter outlet, buffer inlet, buffer outlet, and evaporation inlet are connected in sequence to form a liquid path; the evaporation exhaust port and air inlet are connected in sequence to form a gas path.

[0012] In some embodiments of this invention, the filter chamber is connected to a backwash pipe.

[0013] In some embodiments of this utility model, the upper part of the buffer chamber has a buffer gas phase space, which is connected to the gas path.

[0014] In some embodiments of this invention, the heating element is wound around the outer wall of the evaporation chamber.

[0015] In some embodiments of this invention, multiple air inlets are evenly distributed in the lower part of the spray chamber.

[0016] In some embodiments of this utility model, the vertical hydrochloric acid recovery device also includes a thermometer for monitoring the temperature within the volatile liquid phase space.

[0017] In some embodiments of this utility model, the vertical hydrochloric acid recovery device also includes a flow meter for monitoring the gas flow rate in the gas path.

[0018] In some embodiments of this utility model, the vertical hydrochloric acid recovery equipment also includes a PLC control system associated with the opening and closing of the evaporation outlet, a thermometer, and a flow meter.

[0019] The embodiments of this utility model have at least the following advantages or beneficial effects:

[0020] 1. The spray chamber, filter chamber, buffer chamber and evaporation chamber are integrated from top to bottom, reducing the occupation of horizontal space.

[0021] 2. After the hydrochloric acid in the wastewater is heated by the heating element to promote volatilization, it will rise and come into contact with the bottom of the buffer chamber to exchange heat, thereby preheating the wastewater in the buffer chamber and reducing the overall energy consumption of the vertical hydrochloric acid recovery equipment.

[0022] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a vertical hydrochloric acid recovery device; the double-dotted line in the diagram indicates the liquid level.

[0025] icon:

[0026] 1-Spray chamber, 11-Air inlet, 12-Spray pipe

[0027] 2-Filter chamber, 21-Filter inlet, 22-Filter outlet, 23-Backwash pipe

[0028] 3-Buffer chamber, 31-Buffer inlet, 32-Buffer outlet, 33-Buffer vent pipe

[0029] 4-Volatilization chamber, 41-Volatilization liquid phase space, 411-Volatilization inlet, 412-Volatilization outlet, 42-Volatilization gas phase space, 421-Volatilization exhaust outlet.

[0030] 5-Heating element,

[0031] 6-Thermometer, 7-Flow meter, 8-PLC control system. Detailed Implementation

[0032] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention.

[0033] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0034] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0035] The embodiments of this utility model will be described in detail below.

[0036] Example

[0037] See Figure 1 This embodiment provides a vertical hydrochloric acid recovery device, which includes a spray chamber 1, a filter chamber 2, a buffer chamber 3 and a volatilization chamber 4 arranged sequentially from top to bottom in a recovery container.

[0038] The filter chamber 2 has a filter inlet 21 and a filter outlet 22. The filter inlet 21 is used to introduce wastewater, and filter packing is provided between the filter inlet 21 and the filter outlet 22.

[0039] The buffer chamber 3 has a buffer inlet 31 and a buffer outlet 32, and the buffer inlet 31 is connected to the filter outlet 22.

[0040] The evaporation chamber 4 has a liquid phase space 41 and a gas phase space 42 distributed from bottom to top. The liquid phase space 41 is connected to an evaporation inlet 411 and an evaporation outlet 412. The evaporation inlet 411 is connected to a buffer outlet 32. The evaporation outlet 412 is used to discharge wastewater after hydrochloric acid recovery. A heating element 5 for heating its interior is provided outside the liquid phase space 41. The heating element 5 is wrapped around the outer wall of the evaporation chamber 4. The gas phase space 42 is connected to an evaporation exhaust outlet 421. The gas phase space 42 and the buffer chamber 3 can conduct heat.

[0041] An air inlet 11 is provided at the lower part of the spray chamber 1, and a spray pipe 12 is provided above the air inlet 11. Multiple air inlets 11 are evenly distributed at the lower part of the spray chamber 1.

[0042] The filter inlet 21, filter outlet 22, buffer inlet 31, buffer outlet 32, and evaporation inlet 411 are sequentially connected to form a liquid path. Wastewater enters the filter chamber 2, is filtered by the filter media to remove impurities, and then enters the buffer chamber 3. It then enters the evaporation liquid phase space 41 of the evaporation chamber 4. The hydrochloric acid in the wastewater is heated by the heating element 5 to promote volatilization. The volatilized hydrochloric acid then enters the spray chamber 1 through the gas path formed by the evaporation exhaust port 421 and the air inlet 11. The spray pipe 12 sprays water downwards, dissolving the rising HCl gas in the water, thus recovering the hydrochloric acid solution. After the above treatment, the concentration of hydrochloric acid in the wastewater is greatly reduced and can be discharged from the evaporation outlet 412.

[0043] As can be seen from the above, this embodiment integrates the spray chamber 1, filter chamber 2, buffer chamber 3, and volatilization chamber 4 from top to bottom, reducing the occupancy of horizontal space. Furthermore, after the hydrochloric acid in the wastewater is heated by the heating element 5 to promote volatilization, it rises and contacts the bottom of the buffer chamber 3 for heat exchange, thereby preheating the wastewater in the buffer chamber 3 and reducing the overall energy consumption of the vertical hydrochloric acid recovery equipment.

[0044] The filter chamber 2 is connected to a backwash pipe 23, which can be used to backwash the filter media after a period of use. The backwash water can remove the impurities adsorbed on the filter media.

[0045] The upper part of the buffer chamber 3 has a buffer gas phase space, which is connected to the above-mentioned gas path through the buffer exhaust pipe 33. Thus, when the upper part of the buffer chamber 3 has a buffer gas phase space (the wastewater does not fill the buffer chamber 3), the hydrochloric acid in the wastewater in the buffer chamber 3 also has a certain volatilization phenomenon. In this embodiment, the volatilized HCl gas in the buffer chamber 3 is also guided to the spray chamber 1 for recovery.

[0046] The vertical hydrochloric acid recovery equipment also includes a thermometer 6 and a flow meter 7; the thermometer 6 is used to monitor the temperature in the volatile liquid phase space 41 to reflect the working status of the heating element 5; the flow meter 7 is used to monitor the gas flow rate in the above gas path to reflect the amount of volatile HCl gas.

[0047] The vertical hydrochloric acid recovery equipment also includes a PLC control system 8 associated with the opening and closing of the evaporation outlet 412, the thermometer 6, and the flow meter 7; the PLC control system 8 is configured to automatically open the evaporation outlet 412 to discharge the treated wastewater when the following three conditions are met simultaneously:

[0048] 1. The temperature reading from thermometer 6 is below the predetermined temperature range;

[0049] 2. The data detected by flow meter 7 is less than the predetermined flow range;

[0050] 3. Both of the above conditions must be met for the specified time.

[0051] When all three of the following conditions are met simultaneously, it indicates that the concentration of hydrochloric acid in the wastewater is low and it can be discharged. Those skilled in the art can select appropriate predetermined temperature range, predetermined flow rate range, and predetermined time as needed to meet the corresponding emission standards.

[0052] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. For those skilled in the art, this utility model can have various modifications and variations. Without conflict, the embodiments and features described in this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vertical hydrochloric acid recovery apparatus, characterized by, The spray chamber, the filter chamber, the buffer chamber and the volatilization chamber are arranged in sequence from top to bottom. The filter chamber has a filter liquid inlet and a filter liquid outlet, and the filter liquid inlet and the filter liquid outlet are provided with filter fillers. The buffer chamber has a buffer liquid inlet and a buffer liquid outlet. The volatilization chamber is provided with a volatilization liquid phase space and a volatilization gas phase space from bottom to top, the volatilization liquid phase space is connected with a volatilization liquid inlet and a volatilization liquid outlet, the volatilization liquid phase space is provided with a heating member for heating the inside of the volatilization liquid phase space, the volatilization gas phase space is connected with a volatilization gas outlet, and the volatilization gas phase space can conduct heat with the buffer chamber. The spray chamber is provided with an air inlet head, and the air inlet head is provided with a spray pipe above. The filter liquid inlet, the filter liquid outlet, the buffer liquid inlet, the buffer liquid outlet and the volatilization liquid inlet are sequentially connected to form a liquid path, and the volatilization gas outlet and the air inlet head are sequentially connected to form an air path.

2. The vertical hydrochloric acid recovery apparatus according to claim 1, characterized by The filter chamber is connected with a backwashing pipe.

3. The vertical hydrochloric acid recovery apparatus according to claim 1, characterized by The upper part of the buffer chamber has a buffer gas phase space, and the buffer gas phase space is connected with the air path.

4. The vertical hydrochloric acid recovery apparatus according to claim 1, characterized by The heating member is wound on the outer wall of the volatilization chamber.

5. The vertical hydrochloric acid recovery apparatus according to claim 1, characterized by A plurality of air inlet heads are uniformly distributed in the lower part of the spray chamber.

6. The vertical hydrochloric acid recovery apparatus according to claim 1, characterized by The vertical hydrochloric acid recovery equipment further comprises a thermometer for monitoring the temperature in the volatilization liquid phase space.

7. The vertical hydrochloric acid recovery apparatus according to claim 6, characterized by The vertical hydrochloric acid recovery equipment further comprises a flow meter for monitoring the gas flow in the air path.

8. The vertical hydrochloric acid recovery apparatus according to claim 7, characterized by The vertical hydrochloric acid recovery equipment further comprises a PLC control system associated with the opening and closing of the volatilization liquid outlet, the thermometer and the flow meter.

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