A pickling water steam emission cooling device

Abstract

This utility model discloses a pickling steam emission cooling device, including a pickling tank, an acid mist collection hood, a fluorine-resistant rubber hose, a fixed straight pipe section, a cyclone demister, a heat exchange device, a long circulating buffer pipe, a neutralization and regulating mechanism, and a condensate storage tank. The acid mist collection hood is installed above the pickling tank. The outlet of the acid mist collection hood is connected to the inlet of the fixed straight pipe section via the fluorine-resistant rubber hose. The outlet of the fixed straight pipe section is connected to the inlet of the cyclone demister. The outlet of the cyclone demister is connected to the steam side inlet of the heat exchange device. A neutralization and regulating mechanism is installed in the flow area of ​​the long circulating buffer pipe. The end of the long circulating buffer pipe is connected to the inlet of the condensate storage tank, improving the environmental friendliness and resource utilization efficiency of the pickling process.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a cooling device for the emission of pickling water vapor. Background Technology

[0002] In modern industrial production, pickling is a common metal surface treatment method, widely used in many industries such as steel, metallurgy, and chemicals. The process mainly involves placing the metal material to be treated in a pickling tank, where the acid solution removes oxide scale, rust, and other impurities from the metal surface, thereby cleaning and activating the metal surface and providing good surface conditions for subsequent processing, plating, or welding.

[0003] However, during the pickling process, a certain amount of water vapor is generated due to the chemical reaction between the acid and the metal. If this water vapor is directly released into the atmosphere without effective treatment, it will cause a series of problems. On the one hand, it will pollute the surrounding atmosphere. The acidic substances it contains will diffuse with the water vapor, potentially corroding and damaging surrounding vegetation, soil, and buildings, affecting the ecological balance and the lifespan of surrounding facilities. On the other hand, from a resource utilization perspective, this is undoubtedly a waste. The condensate formed after the water vapor condenses can be recycled and reused in industrial production, helping to reduce water costs for enterprises and improve water resource utilization efficiency. However, with direct discharge, this potential resource value cannot be effectively explored and utilized. Therefore, developing a highly efficient pickling water vapor emission cooling device is particularly important and urgent. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model relates to a pickling water vapor emission cooling device. This device has a simple and reliable structure, effectively solves the aforementioned technical problems, and is suitable for widespread use. To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] A pickling steam emission cooling device includes a pickling tank, an acid mist collection hood, a fluorine-resistant rubber hose, a fixed straight pipe section, a cyclone demister, a heat exchange device, a long circulating buffer pipe, a neutralization and regulating mechanism, and a condensate storage tank. The acid mist collection hood is installed above the pickling tank. The outlet of the acid mist collection hood is connected to the inlet of the fixed straight pipe section via the fluorine-resistant rubber hose. The outlet of the fixed straight pipe section is connected to the inlet of the cyclone demister. The outlet of the cyclone demister is connected to the steam side inlet of the heat exchange device. A neutralization and regulating mechanism is installed in the flow area of ​​the long circulating buffer pipe. The end of the long circulating buffer pipe is connected to the inlet of the condensate storage tank.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the long circulating buffer pipeline includes an input pipe, an output pipe, and an annular rotary pipe. The input pipe and the output pipe are both vertically arranged and parallel to each other. The input pipe and the output pipe are connected through the annular rotary pipe. The inlet of the input pipe is connected to the outlet of the heat exchange device, and the outlet of the output pipe is connected to the inlet of the condensate storage tank. The input pipe, the output pipe, and the annular rotary pipe are fixed as a whole on a rigid support frame.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the neutralization and adjustment mechanism is set in the horizontal section of the annular rotary pipe, the neutralization and adjustment mechanism includes a dosing pipeline and a dosing pump, the dosing pipeline is connected to the annular rotary pipe, and the dosing pump is used to introduce the neutralization liquid.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the heat exchange device is a plate heat exchanger.

[0009] Based on the above scheme and as a preferred embodiment, the system further includes a reflux pipe and an online pH detection unit. A three-way switching valve is installed between the end of the long circulation buffer pipe and the inlet of the condensate storage tank. The three ports of the three-way switching valve are respectively connected to the outlet of the long circulation buffer pipe, the inlet of the condensate storage tank, and the inlet of the reflux pipe. The outlet of the reflux pipe is connected to the inlet of the long circulation buffer pipe. The online pH detection unit is installed between the long circulation buffer pipe and the condensate storage tank and is used to detect the pH value of the water flow in real time.

[0010] The outstanding and beneficial technical effects of this invention compared to existing technologies are as follows: By organically combining the acid mist collection hood, fluorine-resistant rubber hose, fixed straight pipe section, cyclone demister, and heat exchange device, water vapor generated during the pickling process can be efficiently captured and cooled, effectively reducing the disorderly emission of harmful acid mist and lowering the risk of pollution to the atmospheric environment. At the same time, the synergistic effect of the long circulation buffer pipe, neutralization and adjustment mechanism, and condensate storage tank enables the orderly collection, pH adjustment, and stable storage of condensate, which not only avoids the waste of condensate resources but also ensures that emissions meet environmental protection standards, thereby improving the environmental friendliness and resource utilization efficiency of the pickling process. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a piping system;

[0012] Figure 2 This is a schematic diagram of a long-circulation buffer pipeline. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. However, the specific implementation methods and embodiments described below are for illustrative purposes only and are not intended to limit the present invention.

[0014] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The directions or positional relationships shown are for the purpose of describing this utility model only, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0015] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0016] To solve the above technical problems, such as Figure 1-2 As shown, this utility model designs a pickling water steam emission cooling device, including a pickling tank 1, an acid mist collection hood 2, a fluorine-resistant rubber hose 3, a fixed straight pipe section 4, a cyclone demister 5, a heat exchange device 6, a long circulating buffer pipe 7, a neutralization and regulating mechanism 8, and a condensate storage tank 9. The acid mist collection hood 2 is installed above the pickling tank 1. The outlet of the acid mist collection hood 2 is connected to the inlet of the fixed straight pipe section 4 via the fluorine-resistant rubber hose 3. The outlet of the fixed straight pipe section 4 is connected to the inlet of the cyclone demister 5. The outlet of the cyclone demister 5 is connected to the steam side inlet of the heat exchange device 6. The neutralization and regulating mechanism 8 is installed in the flow area of ​​the long circulating buffer pipe 7. The end of the long circulating buffer pipe 7 is connected to the inlet of the condensate storage tank 9.

[0017] During operation, the metal materials in the pickling tank 1 undergo a pickling reaction, generating water vapor containing acidic substances. The acid mist collection hood 2 is located above the pickling tank 1 and uses its own structure and suction to collect the rising acid mist, preventing it from spreading to the surrounding environment. The collected acid mist is then safely transported to the fixed straight pipe section 4 through the fluorine-resistant rubber hose 3, which has good corrosion resistance and can adapt to the acidic environment. The fixed straight pipe section 4 plays a role in stabilizing the airflow and supporting the connection, allowing the acid mist to enter the cyclone demister 5 evenly. The cyclone demister 5 uses the principle of centrifugal force. When the acid mist passes through the cyclone blades at high speed, the droplets and particles are thrown against the wall of the device and separated under the action of gravity, further purifying the acid mist.

[0018] After being processed by the cyclone demister 5, the water vapor enters the heat exchange device 6. The heat exchange device 6 can be a plate heat exchanger (such as a plate heat exchanger of model BR-HE-120), which has many corrugated heat transfer plates inside. Water vapor and cooling medium (such as cooling water) flow on both sides of the plates and exchange heat through the plates, so that the temperature of the high-temperature water vapor is reduced and condensed into liquid water.

[0019] The long circulation buffer pipeline 7 and the neutralization and adjustment mechanism 8 can adjust the pH of the condensate to meet the discharge standards or the conditions for reuse, and finally store it in the condensate storage tank 9. The whole equipment realizes the environmentally friendly treatment of pickling steam and the effective recycling of water resources.

[0020] In this embodiment, it is further preferred that the long circulating buffer pipe 7 includes an input pipe 71, an output pipe 72, and an annular rotary pipe 73. The input pipe 71 and the output pipe 72 are both vertically arranged and parallel to each other. The input pipe 71 and the output pipe 72 are connected by the annular rotary pipe 73. The inlet of the input pipe 71 is connected to the outlet of the heat exchange device 6, and the outlet of the output pipe 72 is connected to the inlet of the condensate storage tank 9. The input pipe 71, the output pipe 72, and the annular rotary pipe 73 are fixed as a whole on the rigid support frame 74. Condensate flows from the outlet of the heat exchange device 6 into the input pipe 71 of the long circulating buffer pipe 7. Since the input pipe 71 and the output pipe 72 are vertically arranged and parallel, and are connected by the annular rotary pipe 73, the long path provides buffering. The condensate forms a relatively stable circulating flow state in the pipe. The fixing effect of the rigid support frame further ensures the stability of the pipe during the condensate flow process, providing stable water flow conditions for subsequent neutralization, regulation, and storage.

[0021] In this embodiment, it is further preferred that the neutralization and adjustment mechanism 8 is located in the horizontal section of the annular rotary pipe 73. The neutralization and adjustment mechanism 8 includes a dosing pipeline 81 and a dosing pump 82. The dosing pipeline 81 is connected to the annular rotary pipe 73, and the dosing pump 82 is used to introduce the neutralizing liquid. The neutralization and adjustment mechanism 8 can uniformly add the neutralizing liquid to the condensate. Through the synergistic action of the dosing pump 82 and the dosing pipeline 81, the pH of the condensate can be precisely adjusted. This ensures that the pH value of the condensate meets the discharge standards or the requirements for reuse, reducing environmental pollution and improving the utilization rate of water resources.

[0022] In a further preferred embodiment, the system also includes a return pipe 10 and an online pH detection unit 11. A three-way switching valve 12 is installed between the end of the long circulation buffer pipe 7 and the inlet of the condensate storage tank 9. The three ports of the three-way switching valve 12 are respectively connected to the outlet of the long circulation buffer pipe 7, the inlet of the condensate storage tank 9, and the inlet of the return pipe 10. The outlet of the return pipe 10 is connected to the inlet of the long circulation buffer pipe 7. The online pH detection unit 11 is installed between the long circulation buffer pipe 7 and the condensate storage tank 9 and is used to detect the pH value of the water flow in real time. Specifically, the online pH detection unit 11 can be a pH sensor InPro4010 / 120. When the condensate is transported through the long circulation buffer pipe 7 and flows to the connection between the end of the long circulation buffer pipe 7 and the inlet of the condensate storage tank 9, the online pH detection unit 11 detects the pH value of the condensate in real time and accurately. If the pH value of the condensate is within the preset acceptable range, the three-way switching valve 12 maintains the connection between the long circulation buffer pipe 7 and the inlet of the condensate storage tank 9, allowing the condensate to flow smoothly into the condensate storage tank 9. It can then be discharged or reused as needed. Once the pH value of the condensate exceeds the acceptable range, the pH online detection unit 11 immediately sends a signal to the three-way switching valve 12. Upon receiving the signal, the three-way switching valve 12 quickly switches the water flow direction, allowing the unacceptable condensate to flow into the return pipe 10. The return pipe 10 guides this portion of condensate back to the inlet of the long circulation buffer pipe 7, allowing it to pass through the neutralization and adjustment mechanism 8 again for pH adjustment. This design effectively prevents unacceptable condensate from causing potential harm to subsequent processes or receiving water bodies, ensuring the stable and reliable operation of the entire pickling water steam emission cooling system and avoiding system failures or environmental pollution risks caused by water quality issues.

[0023] It is worth noting that the technical features involved in this utility model patent application, such as plate heat exchangers, online pH detection units, dosing pumps, and acid mist collection hoods, should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be adopted using conventional choices in the field and should not be regarded as the inventive point of this utility model patent. This utility model patent will not elaborate further.

[0024] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made by those skilled in the art based on the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. An acid wash water vapor exhaust cooling apparatus, characterized by: The system includes an acid pickling tank, an acid mist collection hood, a fluorine-resistant rubber hose, a fixed straight pipe section, a cyclone demister, a heat exchange device, a long circulating buffer pipe, a neutralization and regulating mechanism, and a condensate storage tank. The acid mist collection hood is installed above the acid pickling tank. The outlet of the acid mist collection hood is connected to the inlet of the fixed straight pipe section via a fluorine-resistant rubber hose. The outlet of the fixed straight pipe section is connected to the inlet of the cyclone demister. The outlet of the cyclone demister is connected to the steam side inlet of the heat exchange device. A neutralization and regulating mechanism is installed in the flow area of ​​the long circulating buffer pipe. The end of the long circulating buffer pipe is connected to the inlet of the condensate storage tank.

2. An apparatus for cooling of pickling water vapour emissions according to claim 1, characterised in that: The long circulating buffer pipeline includes an input pipe, an output pipe, and an annular rotary pipe. The input pipe and the output pipe are both vertically arranged and parallel to each other. The input pipe and the output pipe are connected through the annular rotary pipe. The inlet of the input pipe is connected to the outlet of the heat exchange device, and the outlet of the output pipe is connected to the inlet of the condensate storage tank. The input pipe, the output pipe, and the annular rotary pipe are fixed as a whole on a rigid support frame.

3. An apparatus for cooling of pickling water vapour emissions according to claim 2, characterised in that: The neutralization and adjustment mechanism is located in the horizontal section of the annular rotary pipe. The neutralization and adjustment mechanism includes a dosing pipeline and a dosing pump. The dosing pipeline is connected to the annular rotary pipe, and the dosing pump is used to introduce the neutralizing liquid.

4. An apparatus for cooling of pickling water vapour emissions according to claim 3, characterised in that: The heat exchange device is a plate heat exchanger.

5. An apparatus for cooling a pickling water vapor exhaust according to claim 4, wherein: It also includes a reflux pipe and an online pH detection unit. A three-way switching valve is installed between the end of the long circulation buffer pipe and the inlet of the condensate storage tank. The three ports of the three-way switching valve are respectively connected to the outlet of the long circulation buffer pipe, the inlet of the condensate storage tank, and the inlet of the reflux pipe. The outlet of the reflux pipe is connected to the inlet of the long circulation buffer pipe. The online pH detection unit is installed between the long circulation buffer pipe and the condensate storage tank and is used to detect the pH value of the water flow in real time.

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