Underground air cooler purification device

Abstract

The utility model discloses a purification device of an underground air cooler. The purification device comprises a diaphragm pump and an acid solution barrel, the diaphragm pump is connected with the acid solution barrel, the diaphragm pump is connected with the water inlet end of the air cooler, and the water outlet end of the air cooler is connected with the acid solution barrel; and the diaphragm pump is connected with an underground pressure ventilation pipe. The acid pickling device has the advantages that underground compressed air is adopted as an air source to drive the diaphragm pump to pump acid liquid into the air cooler for acid pickling, the working time of the cleaning process is shortened, cleaning is more thorough and clean, the service life of the air cooler is longer, and production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a coal mine electromechanical engineering, and more particularly to an underground air cooler purification device. Background Technology

[0002] A certain coal mine operates at deep depths with high ground pressure and temperature, resulting in high temperatures in the underground fully mechanized mining and tunneling roadways. To address this high temperature issue, a centralized cooling system is employed. Air coolers are installed at the end of the cooling system. Over time, scale accumulates on the serpentine tube fins of the air coolers, reducing their cooling efficiency. To remove the scale, the underground air coolers need to be disassembled, brought to the surface, and returned to the factory for maintenance (acid washing). This increases the disassembly and reassembly processes, transportation, factory repair, and installation, raising costs. Furthermore, repeated disassembly and reassembly also compromises safety.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to solve the problem that currently, in order to remove scale from the air cooler, it is necessary to dismantle the underground air cooler and return it to the factory for maintenance, which increases the cost of disassembly, transportation and affects the safety of use.

[0005] This utility model solves the above-mentioned technical problems through the following technical means:

[0006] The downhole air cooler purification device includes a diaphragm pump and an acid solution tank; the diaphragm pump is connected to the acid solution tank and the water inlet of the air cooler, and the water outlet of the air cooler is connected to the acid solution tank; the diaphragm pump is connected to the downhole compressed air pipe.

[0007] This invention involves mixing a certain amount of acidic solvent and water in an acid solution tank. A diaphragm pump then pumps the acidic liquid from the tank into an air cooler. The scale inside the air cooler reacts with the acidic solution, dissolving and removing the scale. The cleaned wastewater is discharged from the air cooler and returned to the acid solution tank. Downhole compressed air, controlled by a gate valve, enters the diaphragm pump's pipeline and mixes with the cleaning liquid, forming bubbles that more easily remove scale from the air cooler. This downhole air cooler purification device uses downhole compressed air as the air source to drive the diaphragm pump, pumping the acidic liquid into the air cooler for acid washing. This reduces the cleaning time while achieving a more thorough cleaning, extending the air cooler's lifespan and improving production efficiency. Cleaning can also be performed while the device is in use and can be extended to cleaning other equipment.

[0008] Preferably, the pumping pipe of the diaphragm pump is connected to the inlet pipe of the air cooler.

[0009] Preferably, the suction pipe of the diaphragm pump is connected to the acid solution tank, and the end of the suction pipe is placed below the liquid surface of the acid solution tank.

[0010] Preferably, the end of the suction tube located inside the acid solution tank is connected to a filter head.

[0011] Reduce impurities entering the diaphragm pump to ensure its service life.

[0012] Preferably, the outlet pipe of the air cooler is connected to the drain pipe, the other end of the drain pipe is connected to the acid solution tank, and the end of the drain pipe is placed below the liquid surface of the acid solution tank.

[0013] Preferably, a first valve is connected to the suction tube.

[0014] Preferably, a second valve is connected to the drain pipe.

[0015] Preferably, the diaphragm pump is a pneumatic diaphragm pump.

[0016] Preferably, the diaphragm pump is connected to the downhole compressed air pipeline via an air duct, and a gate valve is connected to the air duct.

[0017] Preferably, both the diaphragm pump and the acid solution tank are located below the air cooler.

[0018] The advantages of this utility model are:

[0019] This invention involves mixing a certain amount of acidic solvent and water in an acid solution tank. A diaphragm pump then pumps the acidic liquid from the tank into an air cooler. The scale inside the air cooler reacts with the acidic solution, dissolving and removing the scale. The cleaned wastewater is discharged from the air cooler and returned to the acid solution tank. Downhole compressed air, controlled by a gate valve, enters the diaphragm pump's pipeline and mixes with the cleaning liquid, forming bubbles that more easily remove scale from the air cooler. This downhole air cooler purification device uses downhole compressed air as the air source to drive the diaphragm pump, pumping the acidic liquid into the air cooler for acid washing. This reduces the cleaning time while achieving a more thorough cleaning, extending the air cooler's lifespan and improving production efficiency. Cleaning can also be performed while the device is in use and can be extended to cleaning other equipment.

[0020] The end of the suction tube located inside the acid solution tank is connected to the filter head, which reduces the amount of impurities entering the diaphragm pump and ensures the service life of the diaphragm pump.

[0021] This invention uses underground compressed air as the air source, eliminating the need for additional compressed air supply. It is adaptable to local conditions, saves costs, and is easy to use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the downhole air cooler purification device according to an embodiment of this utility model;

[0023] Numbering on the map:

[0024] 1. Diaphragm pump; 11. Suction pipe; 111. First valve; 112. Filter head; 12. Pump pipe;

[0025] 2. Acid solution tank;

[0026] 3. Air cooler; 31. Liquid inlet pipe; 32. Liquid outlet pipe; 33. Liquid drain pipe; 331. Second valve;

[0027] 4. Air duct; 41. Gate valve; 5. Downhole compressed air pipeline. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] like Figure 1 As shown, the downhole air cooler purification device includes a diaphragm pump 1 and an acid solution tank 2; the pumping pipe 12 of the diaphragm pump 1 is connected to the inlet pipe 31 of the air cooler 3, the suction pipe 11 of the diaphragm pump 1 is connected to the acid solution tank 2, the outlet pipe 32 of the air cooler 3 is connected to the drain pipe 33, and the drain pipe 33 extends into the acid solution tank 2.

[0030] Diaphragm pump 1 is connected to underground compressed air pipeline 5 via air duct 4, and is driven by air in underground compressed air pipeline 5. Air duct 4 is connected to gate valve 41 for controlling start and stop, and further, the volume of underground compressed air can be adjusted. This embodiment uses underground compressed air, utilizing an easily accessible power source at the site of use, eliminating the need for a separate air source, making it convenient to use.

[0031] The pump pipe 12 is sealed to the inlet pipe 31, and the outlet pipe 32 is sealed to the drain pipe 33. This connection can be made using existing connectors. In this embodiment, the lengths of the pipes and connectors are selected according to actual needs. The pipes and connectors should be made of acid-resistant materials.

[0032] A first valve 111 is connected to the suction pipe 11, and a second valve 331 is connected to the discharge pipe 33.

[0033] Specifically, by adding a certain amount of acidic solvent and water to the acid solution tank 2, and turning on the first valve 111, the diaphragm pump 1 pumps the acidic liquid into the pump pipe 12. The acidic liquid flows from the acid solution tank 2 into the inlet pipe 31 of the air cooler 3 and enters the air cooler 3. The scale in the air cooler 3 reacts with the acidic solution, dissolving and removing the scale. The wastewater after cleaning flows from the outlet pipe 32 of the air cooler 3 into the drain pipe 33 and returns to the acid solution tank 2. When the diaphragm pump 1 is working, it generates a pulsed water flow, which helps to easily clean the deposits on the air cooler 3. The underground compressed air enters the pipeline of the diaphragm pump 1 through the gate valve 41 to mix with the cleaning liquid, forming bubbles in the acidic liquid, which further facilitates the cleaning of the scale in the air cooler 3.

[0034] In this embodiment, to prevent impurities or scale particles from entering the diaphragm pump 1, a filter head 112 is connected to the end of the suction pipe 11 that is immersed in the acid solution tank 2 to filter impurities. Alternatively, the solution in the entire acid solution tank 2 can be filtered periodically to remove impurities and ensure the effectiveness of the acid solution.

[0035] In this embodiment, after the acidic solution has essentially filled the air cooler 3, the second valve 331 is closed and the diaphragm pump 1 is stopped. The acidic solution is kept in the air cooler 3 for a period of time to allow the acidic solution to fully react with the scale. Then, the second valve 331 and the diaphragm pump 1 are opened to facilitate the discharge of the scale. The diaphragm pump 1 draws out the acidic solution and discharges it into the serpentine tube assembly wound on the heat sink of the air cooler 3. Finally, the acidic solution enters the acid solution tank 2 through the drain pipe 33. The air cooler uses an internal circulation method for purification, and the purification process lasts for 30 minutes. This effectively removes the scale from the serpentine tube assembly on the heat sink of the air cooler 3, solving the maintenance difficulties of the air cooler 3 and achieving its optimal performance.

[0036] Acid pickling is a common industrial process used to remove oxides, rust, and other impurities from metal surfaces. Several commonly used solutions for acid pickling include hydrochloric acid (which has strong dissolving power and can quickly dissolve rust, copper rust, aluminum rust, and carbonate scale; however, hydrochloric acid is highly corrosive to many metals, so a suitable corrosion inhibitor must be added), sulfuric acid (concentrated sulfuric acid has strong oxidizing properties and can passivate iron, but it does not dissolve scale), nitric acid (nitrates have high solubility, so nitric acid is effective in removing rust, copper rust, and various types of dirt), phosphoric acid (calcium phosphate has low solubility, so phosphoric acid is not commonly used for cleaning scale), and citric acid (citric acid's biggest advantage is that the calcium citrate complex ions formed after the scale reaction have high solubility and are less likely to precipitate). Each solution has its advantages and disadvantages; the choice of solution depends on the specific industrial application, the type of metal to be cleaned, and the desired cleaning effect.

[0037] When in use, there is no need to remove the air cooler 3. Simply connect the corresponding pipes and place it under the air cooler 3. This avoids the time cost and shortened lifespan caused by disassembly and installation.

[0038] Underground compressed air generally refers to the technology of using compressed air (i.e., compressed air) as a power source in underground coal mines. This technology has wide applications in underground coal mines, including ventilation, dust removal, and driving mechanical equipment. As a type of pump driven by air pressure, the working principle of a pneumatic diaphragm pump is compatible with underground compressed air systems. In this embodiment, the underground air cooler purification device uses underground compressed air as the compressed air source, and diaphragm pump 1 is a pneumatic diaphragm pump. The pneumatic diaphragm pump uses compressed air to drive the diaphragm to reciprocate, thereby generating a pressure difference in the two chambers of the pump, realizing the intake and discharge of liquid. This embodiment is adapted to local conditions, saving the additional preparation cost of the compressed air source and is convenient to use.

[0039] In this embodiment, the downhole air cooler purification device drives the diaphragm pump 1 to pump acidic liquid into the air cooler 3 for acid washing. The cleaning process is shortened, yet the cleaning is more thorough and clean, extending the service life of the air cooler 3 and improving production efficiency. Cleaning can also be performed while the device is in use, and its application can be extended to cleaning other equipment.

[0040] The original cost of returning the air cooler to the factory for maintenance (acid washing) was approximately 20,000 yuan per instance, and the cost of dismantling, installing, and transporting the air cooler 3 was approximately 6,000 yuan per instance. In this embodiment, after acid washing the air cooler 3 using diaphragm pump 1 underground, after deducting labor and material costs of 1,000 yuan, a cost saving of 25,000 yuan per instance is achieved. Currently, there are 32 air coolers in use underground at Guqiao Mine. Assuming acid washing is performed twice a year, a total cost saving of 1.6 million yuan is achieved, making it more practical.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A downhole air cooler purifier apparatus, characterized by, The acid solution tank is connected with the diaphragm pump, the water inlet end of the air cooler is connected with the diaphragm pump, and the water outlet end of the air cooler is connected with the acid solution tank.

2. The downhole air cooler purifier of claim 1, wherein, The liquid inlet pipe of the air cooler is connected with the liquid inlet pipe of the diaphragm pump.

3. The downhole air cooler purifier of claim 1, wherein, The liquid suction pipe of the diaphragm pump is connected with the acid solution tank, and the end of the liquid suction pipe is arranged below the liquid level of the acid solution tank.

4. The downhole air cooler purifier of claim 3, wherein, The end of the liquid suction pipe in the acid solution tank is connected with the filter head.

5. The downhole air cooler purifier of claim 1, wherein, The liquid outlet pipe of the air cooler is connected with the liquid discharge pipe, the other end of the liquid discharge pipe is connected with the acid solution tank, and the end of the liquid discharge pipe is arranged below the liquid level of the acid solution tank.

6. The downhole air cooler purifier of claim 3, wherein, The first valve is connected with the liquid suction pipe.

7. The downhole air cooler purifier of claim 5, wherein, The second valve is connected with the liquid discharge pipe.

8. The downhole air cooler purifier of claim 1, wherein, The diaphragm pump is a pneumatic diaphragm pump.

9. The downhole air cooler purifier of claim 1, wherein, The diaphragm pump is connected with the downhole air pressure pipe through the air pipe, and the air pipe is connected with the gate valve.

10. The downhole air cooler purification apparatus of claim 1, wherein, The diaphragm pump and the acid solution tank are arranged below the air cooler.

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