Electrolytic chlorate washing and acid preparing system

Abstract

According to the electrolytic chlorate washing and acid preparing system provided by the utility model, the acid washing pump is arranged on the acid adding pipeline and is matched with the design of the return pipe acid adding pipeline, and the valves on the pipelines are combined for regulation and control, so that hydrochloric acid can be pumped into the acid storage tank by utilizing negative pressure generated by the Venturi tube, and an acid adding pump does not need to be additionally arranged; the hydrochloric acid solution in the electrolytic chlorine electrode can be pumped back into the acid storage tank through the acid regurgitation pipeline, the top end of the acid storage tank is provided with the first water supply pipeline and the second water supply pipeline which are used for supplying seawater and living water respectively for supplying water, and the seawater and the living water are blended with hydrochloric acid sucked by negative pressure for acid preparation and mixing. And the risks of slipping and corrosion of personnel are reduced, the working intensity of workers is reduced, and the system cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic chloric acid washing technology, and in particular to an electrolytic chloric acid washing acid preparation system. Background Technology

[0002] Electrolytic chlorine, a commonly used seawater sterilization device in LNG receiving terminals, produces precipitates such as manganese hydroxide and calcium carbonate on its electrodes after a period of operation, severely affecting the normal operation and performance of the electrolytic chlorine unit. To remove these precipitates, acid washing of the electrodes is usually required, and one of the key steps in acid washing is adding hydrochloric acid solution to the acid storage tank to prepare the acid mixture.

[0003] The existing acid addition technologies mainly have the following methods and their corresponding disadvantages:

[0004] The first method involves personnel manually lifting the concentrated hydrochloric acid to an operating platform several meters high, and then using a siphon principle to add the acid from the top of the storage tank. This method requires operators to personally move the heavy concentrated hydrochloric acid to a high place. During the transport process, due to the height of the operating platform, operators face a significant risk of slipping. Moreover, hydrochloric acid is highly corrosive, and any leak would pose a serious threat to the personal safety of the operators and would also cause corrosive damage to the surrounding environment.

[0005] The second method is to use a hand pump to add concentrated hydrochloric acid to the acid storage tank. Using a hand pump requires manual operation, which is physically demanding, especially when adding large amounts of acid. Prolonged operation can lead to operator fatigue, and the efficiency of adding acid is relatively low. For systems requiring frequent acid additions, this increases the workload of operators and affects overall work efficiency.

[0006] The third method is to use an acid pump to draw concentrated hydrochloric acid into the acid storage tank. While this method improves the efficiency of acid addition to some extent, it requires the installation of an additional acid pump. This not only increases the equipment cost of the system but also involves a series of additional tasks such as the installation, commissioning, and maintenance of the acid pump, increasing the complexity and maintenance cost of the system.

[0007] Therefore, existing technologies have many problems and defects in the acid addition process of electrolytic chloric acid washing acid preparation systems, whether in terms of operational safety, personnel workload or system cost, making it difficult to meet the requirements of high efficiency, safety and low cost. Utility Model Content

[0008] The purpose of this invention is to provide an electrolytic chloric acid washing and acid preparation system that reduces the risk of personnel slipping and corrosion during the acid addition process, while also reducing the workload and cost of personnel.

[0009] This utility model provides an electrolytic chloric acid washing acid preparation system, including an acid storage tank and a hydrochloric acid tank. The bottom end of the side of the acid storage tank is connected to an acid discharge pipe, and the end of the acid discharge pipe is connected to an electrolytic chlorine electrode. The acid discharge pipe is sequentially equipped with a first valve, an acid washing pump, a second valve, and a third valve. A return pipe is connected between the acid discharge pipe and the top of the acid storage tank. The connection between the return pipe and the acid discharge pipe is located between the second valve and the third valve. A venturi tube is installed on the return pipe. An acid addition pipe is provided on the return pipe at the venturi tube, which is connected to the bottom end of the hydrochloric acid tank. A backflow acid pipe is connected between the acid addition pipe and the acid discharge pipe. The top of the acid storage tank is equipped with a first water supply pipe and a second water supply pipe. Valves are provided on the return pipe, the acid addition pipe, the backflow acid pipe, the first water supply pipe, and the second water supply pipe.

[0010] Furthermore, a fourth valve is provided on the return pipeline, a fifth valve is provided on the acid addition pipeline, a sixth valve is provided on the back acid pipeline, a seventh valve is provided on the first water supply pipeline, and an eighth valve is provided on the second water supply pipeline.

[0011] Furthermore, a pressure gauge is installed on the acid discharge pipeline at the outlet end of the acid washing pump.

[0012] Furthermore, the bottom end of the acid addition tube is provided with a flexible tube, which extends into the bottom end of the hydrochloric acid tank.

[0013] Furthermore, a concentration sensor is installed inside the acid storage tank, and a display screen is installed on the outside of the acid storage tank. The concentration sensor is connected to the display screen via a signal.

[0014] Furthermore, the bottom of the acid storage tank is provided with a first drain pipe, and the first drain pipe is provided with a first drain valve.

[0015] Furthermore, the bottom of the acid storage tank gradually decreases in height from all sides towards the first drain pipe.

[0016] Furthermore, a level gauge communicating with the interior of the acid storage tank is installed on the side wall of the tank.

[0017] Furthermore, a ninth valve and a tenth valve are respectively installed on the connecting pipes between the upper and lower ends of the level gauge and the acid storage tank.

[0018] Furthermore, the bottom end of the level gauge is provided with a second drain pipe connected thereto, and a second drain valve is installed on the second drain pipe.

[0019] The beneficial effects of this technical solution are as follows: This solution uses an acid pickling pump installed on the acid addition pipeline, combined with the design of the return pipeline acid addition pipeline, and the valves on each pipeline for regulation. The negative pressure generated by the Venturi tube can draw hydrochloric acid into the acid storage tank without the need for an additional acid addition pump. Furthermore, the hydrochloric acid solution in the electrolytic chlorine electrode can be pumped back into the acid storage tank using the back acid pipeline. The top of the acid storage tank is equipped with a first water supply pipeline and a second water supply pipeline for supplying seawater and domestic water, respectively. These waters are mixed with the hydrochloric acid drawn in under negative pressure to produce acid mixtures. This system avoids the need for personnel to climb to add acid, reducing the risk of slipping and corrosion, while also reducing the workload of staff and lowering system costs. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a system structure diagram of the present invention.

[0022] Explanation of reference numerals in the attached diagram: 1-Acid storage tank, 2-Acid drain line, 3-First valve, 4-Acid pickling pump, 5-Pressure gauge, 6-Second valve, 7-Third valve, 8-Return line, 9-Fourth valve, 10-Venturi tube, 11-Acid addition line, 12-Hydrochloric acid tank, 13-Fifth valve, 14-Return acid line, 15-Sixth valve, 16-First water supply line, 17-Seventh valve, 18-Second water supply line, 19-Eighth valve, 20-Level gauge, 21-Ninth valve, 22-Tenth valve, 23-Second drain pipe, 24-Second drain valve, 25-First drain pipe, 26-First drain valve. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. 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.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element 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.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" 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; 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 based on the specific circumstances.

[0026] Example 1

[0027] like Figure 1 As shown, this utility model provides an electrolytic chloric acid washing acid preparation system, including an acid storage tank 1 and a hydrochloric acid tank 12. The bottom end of the side of the acid storage tank 1 is connected to an acid discharge pipe 2, and the end of the acid discharge pipe 2 is connected to the electrolytic chlorine electrode. The acid discharge pipe 2 is sequentially equipped with a first valve 3, an acid washing pump 4, a second valve 6, and a third valve 7. A return pipe 8 is connected between the acid discharge pipe and the top of the acid storage tank 1. The connection between the return pipe 8 and the acid discharge pipe is located between the second valve 6 and the third valve 7. A venturi tube 10 and a fourth valve 9 are installed on the return pipe 8. An acid addition pipe 11 is provided on the return pipe 8 at the venturi tube 10, which is connected to the bottom end of the hydrochloric acid tank 12. This is used to generate negative pressure when the fluid passes through, so as to extract the hydrochloric acid in the hydrochloric acid tank 12. A fifth valve 13 is provided on the acid addition pipe 11. A back acid pipe 14 is connected between the acid addition pipe 11 and the acid discharge pipe 2. A sixth valve 15 is provided on the back acid pipe 14.

[0028] The top of the acid storage tank 1 is provided with a first water supply pipeline 16 and a second water supply pipeline 18. The first water supply pipeline 16 is provided with a seventh valve 17, and the second water supply pipeline 18 is provided with an eighth valve 19.

[0029] A pressure gauge 5 is installed on the acid discharge pipeline 2 at the outlet end of the acid pickling pump 4 to monitor the pressure inside the pipeline in real time.

[0030] The bottom end of the acid adding tube is equipped with a flexible hose that extends into the bottom of the hydrochloric acid tank 12. The flexible hose facilitates its removal for cleaning and also allows the acid adding tube to connect with the bottom of the hydrochloric acid tank 12.

[0031] A concentration sensor is installed inside the acid storage tank 1, and a display screen is installed on the outside of the acid storage tank 1. The concentration sensor is connected to the display screen, so that the concentration of hydrochloric acid solution inside the acid storage tank 1 can be easily observed through the display screen during the acid preparation process.

[0032] The bottom of the acid storage tank 1 is provided with a first drain pipe 25 and a first drain valve 26, which is used to drain the residual liquid inside the acid storage tank 1 during cleaning. In order to drain the residual liquid inside the acid storage tank 1, the bottom of the acid storage tank 1 is designed to gradually decrease in height from all sides to the first drain pipe 25.

[0033] A level gauge 20, which communicates with the interior of the acid storage tank 1, is installed on the side wall of the acid storage tank 1 for real-time observation of the solution volume inside the acid storage tank 1. A ninth valve 21 and a tenth valve 22 are respectively installed on the connecting pipes between the upper and lower ends of the level gauge 20 and the acid storage tank 1. A second drain pipe 23, which communicates with the bottom of the level gauge 20, is provided. A second drain valve 24 is installed on the second drain pipe 23. By controlling the ninth valve 21 and the tenth valve 22, cleaning fluid can be introduced into the level gauge 20 to clean the level gauge 20 and isolate the level gauge 20 from the acid storage tank 1. The liquid is then discharged through the second drain pipe 23.

[0034] Working principle

[0035] Working principle of adding concentrated hydrochloric acid: First valve 3, second valve 6, fourth valve 9, ninth valve 21, and tenth valve 22 are in the open state, and third valve 7, sixth valve 15, seventh valve 17, eighth valve 19, second drain valve 24, and first drain valve 26 are in the closed state. Insert the hydrochloric acid hose into the hydrochloric acid tank 12, open the fifth valve 13, and start the acid washing pump 4. The concentrated hydrochloric acid in the hydrochloric acid tank 12 is pumped into the acid storage tank 1 due to the negative pressure generated by the Venturi pump. After the operation is completed, stop the pump and close the fifth valve 13.

[0036] Working principle of acid mixing: Open the seventh valve 17 or the eighth valve 19 according to the required hydrochloric acid concentration. The first valve 3, the second valve 6, the fourth valve 9, the ninth valve 21, and the tenth valve 22 are in the open state. The third valve 7, the fifth valve 13, the sixth valve 15, the seventh valve 17, the eighth valve 19, the second drain valve 24, and the first drain valve 26 are in the closed state. Start the pickling pump 4 to mix the acids.

[0037] Pickling working principle: First valve 3, second valve 6, third valve 7, ninth valve 21, and tenth valve 22 are in the open state, and fourth valve 9, fifth valve 13, sixth valve 15, seventh valve 17, eighth valve 19, second drain valve 24, and first drain valve 26 are in the closed state. Start pickling pump 4 to input hydrochloric acid solution into electrolytic chlorine electrode for pickling.

[0038] Back-acid working principle: After pickling, the hydrochloric acid solution in the electrolytic chlorine electrode needs to be pumped back to the acid storage tank 1. The first valve 3, the second valve 6, the fourth valve 9, the sixth valve 15, the ninth valve 21, and the tenth valve 22 are in the open state, while the third valve 7, the fifth valve 13, the seventh valve 17, the eighth valve 19, the second drain valve 24, and the first drain valve 26 are in the closed state. The pickling pump 4 is started, and the hydrochloric acid solution in the electrolytic chlorine electrode is pumped back to the acid storage tank 1 due to the negative pressure generated by the Venturi tube 10.

[0039] This solution utilizes an acid pump installed on the acid addition pipeline, combined with a return pipeline design and valves on each pipeline for regulation. The negative pressure generated by the venturi tube draws hydrochloric acid into the storage tank, eliminating the need for an additional acid pump. Furthermore, the backflow pipeline can pump the hydrochloric acid solution from the electrolytic chlorine electrode back into the storage tank. The top of the storage tank is equipped with a first and a second water supply pipeline for seawater and domestic water, respectively, to mix with the hydrochloric acid drawn in under negative pressure. This system avoids the need for personnel to climb to add acid, reducing the risk of slips and corrosion, while also reducing the workload of staff and lowering system costs.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electrolytic chloric acid washing and acid preparation system, characterized in that, The system includes an acid storage tank and a hydrochloric acid tank. The bottom of the side of the acid storage tank is connected to an acid discharge pipe, the end of which is connected to an electrolytic chlorine electrode. The acid discharge pipe is sequentially equipped with a first valve, an acid washing pump, a second valve, and a third valve. A return pipe connects the acid discharge pipe to the top of the acid storage tank, with the connection point between the return pipe and the acid discharge pipe located between the second and third valves. A venturi tube is installed on the return pipe. An acid addition pipe, connected to the bottom of the hydrochloric acid tank, is located on the return pipe at the venturi tube. A backflow acid pipe connects the acid addition pipe to the acid discharge pipe. A first water supply pipe and a second water supply pipe are respectively located at the top of the acid storage tank. Valves are installed on the return pipe, acid addition pipe, backflow acid pipe, first water supply pipe, and second water supply pipe.

2. The electrolytic chloric acid washing and acid preparation system according to claim 1, characterized in that, The return pipeline is equipped with a fourth valve, the acid addition pipeline is equipped with a fifth valve, the back acid pipeline is equipped with a sixth valve, the first water supply pipeline is equipped with a seventh valve, and the second water supply pipeline is equipped with an eighth valve.

3. The electrolytic chloric acid washing and acid preparation system according to claim 1, characterized in that, A pressure gauge is installed on the acid discharge pipeline at the outlet end of the acid pickling pump.

4. The electrolytic chloric acid washing and acid preparation system according to claim 1, characterized in that, The bottom end of the acid addition tube is equipped with a flexible tube that extends into the bottom of the hydrochloric acid tank.

5. The electrolytic chloric acid washing and acid preparation system according to claim 1, characterized in that, The acid storage tank is equipped with a concentration sensor inside, and a display screen is provided on the outside of the acid storage tank. The concentration sensor is connected to the display screen for signal transmission.

6. The electrolytic chloric acid washing and acid preparation system according to claim 1, characterized in that, The bottom of the acid storage tank is provided with a first drain pipe, and the first drain pipe is provided with a first drain valve.

7. The electrolytic chloric acid washing and acid preparation system according to claim 6, characterized in that, The bottom of the acid storage tank gradually decreases in height from all sides towards the first drain pipe.

8. The electrolytic chloric acid washing and acid preparation system according to claim 1, characterized in that, A level gauge connected to the interior of the acid storage tank is installed on the side wall of the tank.

9. The electrolytic chloric acid washing and acid preparation system according to claim 8, characterized in that, The upper and lower ends of the level gauge are respectively equipped with a ninth valve and a tenth valve on the connecting pipes to the acid storage tank.

10. The electrolytic chloric acid washing and acid preparation system according to claim 8, characterized in that, The bottom end of the level gauge is provided with a second drain pipe connected to it, and a second drain valve is installed on the second drain pipe.

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