Descaling device for water system of oxygen production station

Abstract

The utility model provides a descaling device for a water system of an oxygen production station, which comprises a circulating water tank, a circulating pump, a compressor unit, an air cooling tower, a bypass filter and a medicament tank, the water inlet end of the circulating pump is connected with the circulating water tank through a water suction pipe, and the water outlet end of the circulating pump is connected with the compressor unit and the bypass filter in parallel; a water outlet of the bypass filter is connected with the circulating water tank through a first water return pipe; a water outlet of the compressor unit is connected with the upper part of the air cooling tower. By arranging the bypass filter in the circulating water pipeline, substances such as rust and dust in circulating water can be removed, meanwhile, water flow in the first water return pipe can be mixed with a descaling agent in the agent pool in the mixer and then fed into the circulating water pool, and the mixer generates suction force by utilizing the Venturi effect; discharge of chemicals in the chemical pool can be accelerated without an adding pump, no moving part is arranged in the mixer, the mixer is not prone to being corroded by a high-concentration descaling agent, equipment is simplified, and reliability is improved.

Description

Technical Field

[0001] This utility model relates to the field of descaling technology, and in particular to a descaling device for an oxygen production station water system. Background Technology

[0002] In metallurgical enterprises, high-purity oxygen is required as an oxidant in metallurgical production, necessitating oxygen production stations to separate oxygen from the air. These stations typically house multiple compressors, requiring cooling water to remove the heat generated. After the cooling water is heated by the compressors, it is often cooled using an air-cooled tower. During cooling, the water's solubility decreases, making it prone to scaling in low-temperature areas or within the air-cooled tower. This scale adheres to the inner walls of heat exchange tubes, increasing the system pressure difference and the operating pressure of the circulating pump. It also reduces the heat exchange efficiency of the tubes. Therefore, regular descaling of the water system's pipes and equipment is necessary. Descaling involves adding the descaling agent to the cooling water; common methods include gravity-based natural scaling. The solution flows into the circulating water tank. However, this method is inefficient, and the dispersion of the agent after entering the water tank is slow, affecting the descaling speed. For example, Chinese Patent Application No. 202121811757.0 discloses a high-efficiency dispersant quantitative addition device for low-temperature scaling treatment of oxygen-generating circulating water system, including a reagent tank, a dosing pump, and a mixing tank. An inlet pipe is installed on one side of the mixing tank near the top. A reagent tank is installed on the top side of the mixing tank near the inlet pipe. A dosing pump is installed on the top of the mixing tank near the inside of the reagent tank. The input end of the dosing pump is connected to the inside of the reagent tank near the bottom. This device uses a dosing pump to deliver the prepared chemicals into the circulating water tank. Although this allows for rapid dilution and mildening of the chemicals, the concentration of chemicals in the tank is usually high, and the descaling agents are typically corrosive, easily corroding the impeller of the dosing pump. Therefore, a descaling device for the oxygen production station water system is needed. This device is equipped with a bypass filter, which allows the return water from the bypass filter to mix with the chemicals in the tank before initial mixing and then returning the mixture to the circulating water tank, thus increasing the dispersion speed of the descaling agent. At the same time, a mixer is used for mixing, eliminating the need for a dosing pump, simplifying the equipment, and improving reliability. Utility Model Content

[0003] To address the aforementioned issues, this invention proposes a descaling device for an oxygen production station water system. This device is equipped with a bypass filter, which allows the return water from the bypass filter to be mixed with the chemicals in the chemical tank. After initial mixing, the mixture is returned to the circulating water tank, increasing the dispersion rate of the descaling agent. Simultaneously, a mixer is used for mixing, eliminating the need for a pump, simplifying the equipment, and improving reliability.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model proposes a descaling device for an oxygen production station water system, comprising: a circulating water tank, a circulating pump, a compressor unit, an air-cooled tower, a bypass filter, and a chemical tank. The inlet of the circulating pump is connected to the circulating water tank via a suction pipe, and the outlet of the circulating pump is connected in parallel with the compressor unit and the bypass filter. The outlet of the bypass filter is connected to the circulating water tank via a first return water pipe. The outlet of the compressor unit is connected to the upper part of the air-cooled tower, and the lower part of the air-cooled tower is connected to the circulating water tank via a second return water pipe. A bypass pipe is provided on the first return water pipe, and a mixer is provided on the bypass pipe. The lower part of the chemical tank is connected to the inner cavity of the mixer from the side via a dosing pipe.

[0006] Furthermore, the mixer is tubular, with a constriction section inside the mixer cavity. The dosing tube is connected to the middle of the constriction section, and the angle between the dosing tube and the mixer is 40° to 60°.

[0007] Furthermore, the cross-sectional area at the contraction section is 1 / 4 to 1 / 3 of the cross-sectional area of ​​the mixer.

[0008] Furthermore, the bottom of the circulating water pool is provided with a slope, and the lower end of the water suction pipe extends to the lower end of the slope.

[0009] Furthermore, the lower end of the first return water pipe extends to the upper end of the slope, and the outlet of the first return water pipe faces the lower end of the slope.

[0010] Furthermore, a first valve is provided between the circulating pump and the compressor unit, and a second valve is provided between the circulating pump and the bypass filter.

[0011] Furthermore, the circulating water tank is equipped with a water supply pipe and a drainage pipe.

[0012] The beneficial effects of this utility model are as follows: By installing a bypass filter in the circulating water pipeline, substances such as rust and dust in the circulating water can be removed. At the same time, the water flow in the first return water pipe can be mixed with the descaling agent in the chemical tank in the mixer and then sent into the circulating water tank. The mixer uses the Venturi effect to generate suction, which can accelerate the discharge of the chemical agent in the chemical tank without the need for a pump. Moreover, there are no moving parts in the mixer, so it is not easily corroded by high concentrations of descaling agent, simplifying the equipment and improving reliability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the mixer of this utility model;

[0015] In the diagram: 1-Circulating water tank, 2-Circulating pump, 3-Compressor unit, 4-Air-cooled tower, 5-Bypass filter, 6-Chemical tank, 7-First return water pipe, 8-Second return water pipe, 9-Bypass pipe, 10-Mixer, 11-Suction pipe, 12-Dosing pipe, 13-Contraction section, 14-First valve, 15-Second valve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Throughout the description, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0018] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include at least one of the stated features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0019] like Figure 1 , Figure 2 As shown, an embodiment of this utility model provides a descaling device for an oxygen production station water system, including: a circulating water tank 1, a circulating pump 2, a compressor unit 3, an air-cooled tower 4, a bypass filter 5, and a chemical tank 6. The inlet of the circulating pump 2 is connected to the circulating water tank 1 through a suction pipe 11, and the outlet of the circulating pump 2 is connected in parallel with the compressor unit 3 and the bypass filter 5. The outlet of the bypass filter 5 is connected to the circulating water tank 1 through a first return water pipe 7. The outlet of the compressor unit 3 is connected to the upper part of the air-cooled tower 4, and the lower part of the air-cooled tower 4 is connected to the circulating water tank 1 through a second return water pipe 8. A bypass pipe 9 is provided on the first return water pipe 7, and a mixer 10 is provided on the bypass pipe 9. The lower part of the chemical tank 6 is connected to the inner cavity of the mixer 10 from the side through a dosing pipe 12.

[0020] When the oxygen production station is working normally, the circulating pump 2 pumps the cooling water from the circulating water tank 1 and sends it to the compressor unit 3. The cooling water exchanges heat with the compressor unit 3 through the heat exchange tube, removing the heat from the compressor unit 3. After the heat exchange, the temperature of the cooling water rises and then enters the air-cooled tower 4. After being cooled in the air-cooled tower 4, it flows back to the circulating water tank 1 through the second return water pipe 8 to achieve circulation. The compressor unit 3 includes an air compressor, a nitrogen booster compressor, an oxygen compressor, a nitrogen turbine compressor, etc. The cooling water maintains the compressor unit 3 at a normal temperature, ensuring the normal operation of the compressor unit.

[0021] Part of the water flow from the circulating pump 2 enters the bypass filter 5. The bypass filter 5 adopts the structure of a commercially available high-speed filter. The bypass filter 5 filters out rust and dust in the circulating water, reducing the impurity content in the cooling water. Since the content of rust and dust in the cooling water is low, there is no need to connect the filter in series in the cooling water loop, which can reduce the resistance of the cooling water loop and ensure the cooling water flow.

[0022] After the equipment has been running for a period of time, calcium and magnesium ions in the cooling water will produce scale, which will adhere to the heat exchange tubes of the air-cooled tower 4 and the compressor unit 3, increasing the load on the circulating pump 2 and affecting the heat exchange efficiency of the heat exchange tubes. At this time, corrosion inhibitors, copper protectants, descaling agents, and co-solvents can be mixed in proportion, poured into the agent tank 6 and stirred evenly. Then, the valves on the bypass pipe 9 and the dosing pipe 12 are opened. At this time, part of the water in the first return water pipe 7 flows into the mixer 10 through the bypass pipe 9. The mixer 10 is equipped with a contraction section. 13. Here, the cooling water flow rate increases and the pressure decreases, generating the Venturi effect. This allows the chemical agent in the dosing pipe 12 to be drawn into the cooling water and initially mixed. Then, it is discharged into the circulating water tank 1 for further mixing, increasing the mixing and dilution rate of the chemical agent in the cooling water. The chemical agent is used to descale the pipes in the water system, ensuring the heat dissipation capacity of the cooling water. After adding the chemical agent for 5-8 hours, the descaling agent can remove more than 95% of the scale in the pipes. At this time, the water in the circulating water tank 1 can be drained and replaced with new cooling water to complete the descaling operation.

[0023] The mixer 10 has no moving parts and is made of polytetrafluoroethylene, which is not easily corroded and improves reliability. The agent diluted in the circulating water tank 1 has reduced corrosiveness to metal, thus preventing corrosion of the circulating pump 2 and protecting the normal operation of the equipment.

[0024] Specifically, such as Figure 2As shown, the mixer 10 is tubular, and the inner cavity of the mixer 10 is provided with a constriction section 13. The dosing pipe 12 is connected to the middle of the constriction section 13. The flow rate is increased by the mixer 10, thereby generating negative pressure suction, which accelerates the discharge of the agent in the agent tank 6 and after initial mixing with the cooling water of the mixer 10, it is sent to the circulating water tank 1 for further mixing, thereby increasing the mixing speed. The angle between the dosing pipe 12 and the mixer 10 is 40° to 60°, so that the agent enters the mixer 10 with the speed of the water flow, avoiding the backflow of water into the agent tank 6.

[0025] Specifically, such as Figure 2 As shown, the cross-sectional area of ​​the contraction section 13 is 1 / 4 to 1 / 3 of the cross-sectional area of ​​the mixer 10. Since the liquid is basically incompressible, when the cooling water flows through the contraction section 13, according to Bernoulli's principle, the flow rate increases and the pressure decreases, thereby generating negative pressure, which accelerates the discharge of the agent in the agent tank 6 and the initial mixing of the agent with the cooling water in the mixer 10 before sending it to the circulating water tank 1 for further mixing.

[0026] In one specific embodiment, the bottom of the circulating water tank 1 is provided with a slope, and the lower end of the suction pipe 11 extends to the lower end of the slope to facilitate the suction of water from the bottom of the circulating water tank 1.

[0027] Specifically, the lower end of the first return water pipe 7 extends to the upper end of the slope, and the outlet of the first return water pipe 7 faces the lower end of the slope. The rust deposited at the bottom of the circulating water pool 1 can be flushed to the lower part of the suction pipe 11 by the water flow. After being sucked in by the suction pipe 11, it is continuously filtered by the bypass filter 5 to gradually reduce the impurity content in the cooling water.

[0028] Specifically, a first valve 14 is provided between the circulating pump 2 and the compressor unit 3, and a second valve 15 is provided between the circulating pump 2 and the bypass filter 5, so as to facilitate the adjustment of the flow ratio between the compressor unit 3 and the bypass filter 5, thereby adjusting the proportion of filtered water flow of the bypass filter 5.

[0029] In a preferred embodiment, the circulating water tank 1 is equipped with a water supply pipe and a water drain pipe to replace and replenish the cooling water in the circulating water tank 1.

[0030] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A descaling device for an oxygen production station water system, characterized in that, include: The system includes a circulating water tank (1), a circulating pump (2), a compressor unit (3), an air-cooled tower (4), a bypass filter (5), and a chemical tank (6). The inlet of the circulating pump (2) is connected to the circulating water tank (1) via a suction pipe (11). The outlet of the circulating pump (2) is connected in parallel with the compressor unit (3) and the bypass filter (5). The outlet of the bypass filter (5) is connected to the circulating water tank (1) via a first return water pipe (7). The outlet of the compressor unit (3) is connected to the upper part of the air-cooled tower (4). The lower part of the air-cooled tower (4) is connected to the circulating water tank (1) via a second return water pipe (8). A bypass pipe (9) is provided on the first return water pipe (7). A mixer (10) is provided on the bypass pipe (9). The lower part of the chemical tank (6) is connected to the inner cavity of the mixer (10) from the side via a dosing pipe (12).

2. The descaling device for an oxygen production station water system according to claim 1, characterized in that, The mixer (10) is tubular, and the inner cavity of the mixer (10) is provided with a constriction section (13). The dosing tube (12) is connected to the middle of the constriction section (13), and the angle between the dosing tube (12) and the mixer (10) is 40° to 60°.

3. The descaling device for an oxygen production station water system according to claim 2, characterized in that, The cross-sectional area at the contraction section (13) is 1 / 4 to 1 / 3 of the cross-sectional area of ​​the mixer (10).

4. The descaling device for an oxygen production station water system according to claim 1, characterized in that, The bottom of the circulating water tank (1) is provided with a slope, and the lower end of the water suction pipe (11) extends to the lower end of the slope.

5. The descaling device for an oxygen production station water system according to claim 4, characterized in that, The lower end of the first return water pipe (7) extends to the upper end of the slope, and the outlet of the first return water pipe (7) faces the lower end of the slope.

6. The descaling device for an oxygen production station water system according to claim 1, characterized in that, A first valve (14) is provided between the circulating pump (2) and the compressor unit (3), and a second valve (15) is provided between the circulating pump (2) and the bypass filter (5).

7. The descaling device for an oxygen production station water system according to claim 1, characterized in that, The circulating water tank (1) is equipped with a water supply pipe and a drainage pipe.

Images