Pipeline type powder activated carbon dosing device

Abstract

This utility model provides a pipeline-type powdered activated carbon dosing device, comprising several dissolving tanks, each equipped with a level gauge and a stirring assembly. Each tank has a water inlet and a dosing port at its top, and a dosing port at its bottom. A branch pipe is connected to the water inlet, and a water inlet valve is installed on the branch pipe. The branch pipes corresponding to the dissolving tanks are all connected to the same main water inlet pipe, which is connected to a pumping assembly for injecting water into the tanks. A branch pipe is connected to the dosing port, and a dosing valve is installed on the branch pipe. The branch pipes corresponding to the dissolving tanks are all connected to the same main dosing pipe, which is connected to a dosing assembly for pumping the mixed activated carbon solution from the tanks into the raw water supply pipe. This utility model can achieve the addition of activated carbon of different concentrations according to different water quality requirements, and can achieve precise and rapid dosing.

Description

Technical Field

[0001] This utility model relates to the field of raw water pretreatment technology, and in particular to a pipeline-type powdered activated carbon dosing device. Background Technology

[0002] Reservoirs are important water storage facilities for urban production and daily life, and reservoir water is a vital surface water source for daily production and living. The water quality of reservoirs is constantly changing due to pollutants and natural conditions, including seasonal variations and changes at different depths. Therefore, when reservoir water is used as a drinking water source, pretreatment processes are generally required, and the appropriate pretreatment processes need to be adjusted promptly according to the water quality conditions under different environments.

[0003] For issues such as odor and high organic matter content commonly found in raw water, pretreatment with powdered activated carbon is often necessary. However, most existing powdered activated carbon dosing devices are located inside or near the water treatment plant. This method of adding activated carbon results in a reaction and adsorption time that is too short to achieve the desired reaction time and thus the expected pretreatment effect.

[0004] Therefore, researching a raw water pipeline-type powdered activated carbon dosing device that is easy to install, can be used for emergency dosing, and is located at a certain distance from the water plant has become an urgent problem to be solved. Utility Model Content

[0005] In view of the above-mentioned problems existing in the prior art, this utility model provides a pipeline-type powdered activated carbon dosing device, which can add powdered activated carbon of different concentrations according to the needs of different water quality, and can achieve precise and fast dosing to achieve the purpose of water pretreatment.

[0006] This utility model provides a pipeline-type powdered activated carbon dosing device, including: several dissolving tanks, each equipped with a level gauge, a stirring assembly, a water inlet and a dosing port at its top, and a dosing port at its bottom.

[0007] A water inlet branch pipe is connected to the water inlet, and a water inlet valve is installed on the water inlet branch pipe. The water inlet branch pipes installed on several dissolving tanks are all connected to the same main water inlet pipe, and a water pumping assembly for injecting water into the dissolving tank is connected to the main water inlet pipe.

[0008] The outlet is connected to a branch pipe, and a dispensing valve is installed on the branch pipe. The branch pipes of the dissolving tanks are all connected to the same main dispensing pipe, and the main dispensing pipe is connected to a dosing assembly that pumps the mixed medicine inside the dissolving tank into the raw water supply pipe.

[0009] In one embodiment, the pumping assembly includes a main pumping pipe connected to the main inlet pipe, and two branch pumping pipes are connected to the inlet end of the main pumping pipe. A submersible pump is installed on each of the two branch pumping pipes, and a pumping valve is installed on the branch pumping pipe at the outlet end of the submersible pump.

[0010] In one embodiment, a backwash pipe corresponding to the dissolving tank is also included. The inlet end of the backwash pipe is connected to the main inlet pipe, and its outlet end is connected to the outlet branch pipe on the outlet side of the outlet valve. A backwash valve is also provided on the backwash pipe.

[0011] In one embodiment, the dosing assembly includes two dosing pipes. One end of each dosing pipe is connected to the main outlet pipe, and the other end is connected to the corresponding raw water supply pipe. A dosing valve, a dosing pump, a dosing valve, and an end control valve are sequentially installed on the pipe body from the inlet end to the outlet end. The two dosing pipes are connected by a dosing connecting pipe. There are two dosing connecting pipes. The connection point of one dosing connecting pipe is located between the outlet end of the dosing pump and the dosing valve, and the connection point of the other dosing connecting pipe is located between the dosing valve on the outlet side of the dosing pump and the end control valve. Both dosing connecting pipes are equipped with a dosing connecting valve.

[0012] In one embodiment, a pressure gauge is also installed on the dosing pipe between the dosing connection point near the end control valve and the dosing valve.

[0013] In one embodiment, an exhaust valve is also provided on the dosing pipe between the dosing connection point near the end control valve and the dosing valve.

[0014] In one embodiment, two return pipes are also included. One end of the return pipe is connected to the dosing pipe between the outlet of the dosing pump and the dosing valve, and the other end is connected to the return port at the top of the dissolving tank. A return valve is provided on the return pipe.

[0015] Compared with the prior art, the beneficial effects of the pipeline-type powdered activated carbon dosing device provided in this embodiment of the utility model are as follows:

[0016] 1. This utility model embodiment can add activated carbon of different concentrations according to the water intake requirements of different water qualities, and can achieve precise and quick addition. Since it is installed at the water intake point of the water source at a certain distance from the water plant, it has sufficient reaction time and can achieve the purpose of fully pre-treating the water quality.

[0017] 2. The present invention has a simple structure and is easy to install. It can meet the needs of emergency dosing and installation far from water plants. Moreover, multiple chemical dissolving tanks are connected and controlled by pipes and valves. They can be switched or used as backups at will through valves, ensuring smooth and continuous dosing of the chemicals and providing sufficient system stability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a pipeline-type powdered activated carbon dosing device provided for an embodiment of the present invention.

[0019] Figure label:

[0020] 1. Pumping assembly; 101. Main pumping pipe; 102. Branch pumping pipe; 103. Submersible pump; 104. Pumping valve; 2. Main inlet pipe; 3. Branch inlet pipe; 4. Inlet valve; 5. Dissolving tank; 6. Dosing port; 7. Stirring assembly; 8. Backwash pipe; 9. Backwash valve; 10. Main outlet pipe; 11. Branch outlet pipe; 12. Outlet valve; 13. Dosing assembly; 1301. Dosing pipe; 1302. Dosing valve; 1303. Dosing pump; 1304. Pressure gauge; 1305. Air vent valve; 1306. Dosing connecting pipe; 1307. Dosing connecting valve; 1308. Terminal control valve; 14. Return pipe; 15. Return valve; 16. Raw water transmission pipe. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0023] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0024] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0025] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0026] Specific embodiments of this application are described below with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to ascertain the true intent based on the user's historical operations, and to avoid unnecessary or redundant details that would obscure this application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in various ways with substantially any suitable detailed structure.

[0027] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0028] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only for explaining this utility model and are not intended to limit the scope of this utility model. The following description, in conjunction with... Figure 1 The preferred embodiments of this utility model will be described in further detail below:

[0029] like Figure 1 As shown, this utility model embodiment provides a pipeline-type powdered activated carbon dosing device for adding powdered activated carbon into the raw water pipe when drawing water from water sources such as reservoirs, rivers, or lakes. The device includes:

[0030] Several dissolving tanks 5 are provided, each equipped with a level gauge and a stirring assembly 7. The tanks have a water inlet and a dosing port 6 at their top and a dosing port at their bottom.

[0031] A water inlet branch pipe 3 is connected to the water inlet, and a water inlet valve 4 is installed on the water inlet branch pipe 3. The water inlet branch pipes 3 installed on the several dissolving tanks 5 are all connected to the same water inlet main pipe 2, and a water pumping component 1 for injecting water into the dissolving tank 5 is connected to the water inlet main pipe 2.

[0032] The outlet is connected to a branch pipe 11, and a dispensing valve 12 is installed on the branch pipe 11. The branch pipes 11 of the dissolving tanks 5 are all connected to the same main dispensing pipe 10. The main dispensing pipe 10 is connected to a dosing assembly 13 that pumps the mixed medicine inside the dissolving tanks 5 into the raw water supply pipe 16. The dissolving tanks are connected and controlled by pipes and valves. They can be switched or kept on standby at will by the valves to ensure the smooth and continuous addition of the medicine. The dispensing of the corresponding dissolving tank 5 can be controlled and switched by controlling the corresponding dispensing valve 12.

[0033] In one embodiment, the dissolving tank 5 is a water-based dissolving tank. The size and number of these tanks are selected based on the concentration and dosage of the added agent, typically 2m³. 3 -10m 3 Three dissolving tanks 5 of appropriate size are recommended (two for use and one for backup). A suitable dosing port 6 for adding powdered activated carbon (the diameter of the round hole is about 80 cm) should be reserved at the top of the dissolving tank 5. A suitable water inlet and a return port should also be reserved at the top of the dissolving tank 5 to facilitate water filling into the dissolving tank and return flow of the dosing pipe. The water inlet is connected to the water intake pool of the water source by a pipe. The raw water in the water intake pool is drawn by the submersible pump 103 to provide the water source for dissolving the drug in the dissolving tank 5.

[0034] In one embodiment, the stirring assembly 7 is a purchased finished mixer, including a motor, reducer, fixed plate, drive shaft, stirring blades, etc. In order to uniformly and fully stir the powdered activated carbon and prevent uneven precipitation, the distance between the stirring blades and the bottom of the dissolving tank 5 should not be too large, and should be controlled at about 30cm. Because the powdered activated carbon is insoluble in water, the stirring assembly 7 is used to fully stir the powdered activated carbon to prevent it from settling in the dissolving tank 5. During the dosing process, continuous stirring is required, and the stirring speed should be controlled at 50-100 rpm. The required motor power is calculated based on the speed and the diameter of the dissolving tank 5. Before filling the dissolving tank 5 with water to dissolve the drug, the corresponding mixer needs to be turned on and run, and the drug should be dissolved and stirred at the same time. During normal dosing operation, the mixer remains in working condition.

[0035] To ensure sufficient adsorption time for the activated carbon powder, this embodiment of the invention is positioned near the water source of the raw water supply pipe. Specifically, the water source drawn by the pumping assembly 1 is the same as that of the raw water supply pipe, both located at the reservoir. Considering the differences in water level at the source during different seasons (high water season and low water season), to better meet the water intake needs of different seasons, in one embodiment, the pumping assembly 1 includes a main pumping pipe 101 connected to the main inlet pipe 2. The inlet end of the main pumping pipe 101 is connected to two branch pumping pipes 102. Each branch pumping pipe 102 is equipped with a submersible pump 103, and the branch pumping pipe 102 at the outlet end of the submersible pump 103 is also equipped with a pumping valve 104. Submersible pump 103 is used in one position and has a backup. One pump is installed below the water level during the high-water season, while the other is installed below the water level during the low-water season to meet the water intake needs of different seasons. During the non-dry season, the submersible pump 103 at the higher water intake position is used as the main pump to avoid it taking in too much sludge and impurities when taking in water, thus reducing the difficulty of pretreatment and reducing the amount of powdered activated carbon to reduce costs. Of course, if the main pump malfunctions and needs to be repaired, the backup pump needs to be activated in time to meet the pretreatment needs of the raw water pipeline. When in use, the raw water is controlled and switched to the chemical dissolving tank 5 by opening and closing the pump and controlling the corresponding inlet valve 4. Based on this, the water is injected into each chemical dissolving tank 5 and the chemical dissolving tanks are switched by controlling the corresponding inlet valve 4.

[0036] Considering that powdered activated carbon is a water-insoluble particulate matter, it is prone to blockage at the bottom outlet of the dissolving tank 5 and at the outlet valve 12. In order to better unclog the pipeline when blockage occurs, in one embodiment, the device also includes a backwash pipe 8 corresponding to the dissolving tank 5. The inlet end of the backwash pipe 8 is connected to the main inlet pipe 2, and its outlet end is connected to the outlet branch pipe 11 on the outlet side of the outlet valve 12. The backwash pipe 8 is also equipped with a backwash valve 9. That is, the inlet pipe is connected to a pipe to the rear end of the outlet of the dissolving tank 5 through a tee to serve as the backwash pipe 8. If the outlet of the dissolving tank 5 is blocked, backwashing can be performed through the backwash pipe 8.

[0037] To better adapt to the water supply requirements of the raw water pipe, in one embodiment, the dosing assembly 13 includes two dosing pipes 1301. One end of each dosing pipe 1301 is connected to the main dosing pipe 10, and the other end is connected to the corresponding raw water supply pipe 16 (i.e., each dosing pipe 1301 is connected to one raw water supply pipe 16). A dosing valve 1302, a dosing pump 1303, and an end control valve 1308 are sequentially installed on the pipe body from the inlet to the outlet. The chemical dosing pipe 1301 is connected via a chemical dosing connecting pipe 1306. Two chemical dosing connecting pipes 1306 are provided. One connecting pipe 1306 is located between the outlet of the chemical dosing pump 1303 and the chemical dosing valve 1302. The other connecting pipe 1306 is located between the chemical dosing valve 1302 on the outlet side of the chemical dosing pump 1303 and the terminal control valve 1308. Both connecting pipes 1306 are equipped with chemical dosing connecting valves 1307. Two chemical dosing pumps 130... 3. One pump is in operation and one is on standby. The flow rate of the dosing pump 1303 is selected based on the dosage calculation. The head of the dosing pump 1303 is determined based on the liquid level in the dissolving tank 5, the elevation of the dosing point, and the head loss. The dosing pump 1303 is connected to the dosing point on the raw water supply pipe 16. A terminal control valve 1308 is installed at the front end of the dosing point to prevent backflow and control the terminal pressure. Two dosing connecting pipes 1306 are connected, one as the main pipe and one as the standby pipe. The dosing connecting pipe 1306 closest to the dosing pump 1303 (i.e., the upstream side) is... The front section is easy to operate and serves as the main pipeline. When the main dosing connection pipe 1306 in the front section fails, the dosing connection pipe 1306 in the rear section is activated as a backup pipe. The purpose of the dosing connection pipe 1306 is to deal with situations where the dosage is small and only a single pump needs to operate, as well as to prevent situations where a single pump fails and operates alone. By opening the dosing connection valve 1307 on the corresponding dosing connection pipe 1306, the normally operating single pump can achieve synchronous dosing from both dosing pipes 1301.

[0038] A pressure gauge 1304 is also installed on the dosing pipe 1301 between the dosing connection point of the dosing connection pipe 1306 (i.e., the dosing connection pipe 1306 as a spare pipe) near the end control valve 1308 and the dosing valve 1302 (the dosing valve 1302 on the dosing side of the dosing pump 1303).

[0039] An exhaust valve 1305 is also provided on the dosing pipe 1301 between the dosing connection point of the dosing connection pipe 1306 (i.e., the dosing connection pipe 1306 as a spare pipe) near the end control valve 1308 and the dosing valve 1302 (the dosing valve 1302 on the dosing side of the dosing pump 1303). The exhaust valve 1305 is an automatic exhaust valve, which is installed at a suitable position (local high point) after the pump to timely discharge the large amount of gas generated by the agitation of the agent and ensure the normal operation of the dosing pump 1303.

[0040] A pressure gauge 1304 and an automatic exhaust valve 1305 are installed after the dosing pump 1303. The pressure gauge 1304 can observe the pressure in the pipeline after the pump and indicate whether the agent is being added smoothly. The automatic exhaust valve 1305 can promptly discharge the large amount of gas generated by the stirring of the agent, ensuring the normal operation of the dosing pump 1303.

[0041] To prevent pump stalling and control the amount of chemicals added to the raw water supply pipe 16, two return pipes 14 are also included. One end of the return pipe 14 is connected to the dosing pipe 1301 between the outlet of the dosing pump 1303 and the dosing valve 1302, and the other end is connected to the return port at the top of the dissolving tank 5. A return valve 15 is installed on the return pipe 14. That is, a pipe is connected to the return port of the dissolving tank 5 at a suitable position after the dosing pump 1303 to form a return pipeline. If there is an abnormal situation such as blockage at the end of the dosing pipe 1301, the return operation can be carried out through this pipeline to reduce the damage caused by pump stalling. At the same time, the flow rate of the chemical dosage added to the raw water supply pipe 16 can also be adjusted by adjusting the return flow rate of the return pipe 14.

[0042] When the dosage is large, both dosing pumps 1303 operate simultaneously, with each pump supplying chemicals to a separate raw water supply pipe 16. The two dosing pipes 1301 operate independently and do not need to be connected via the dosing connection pipe 1306. Therefore, the dosing connection valve 1307 on the dosing connection pipe 1306 is closed at this time. When the dosage is small or one of the dosing pumps 1303 malfunctions, the operation of the corresponding dosing pump 1303 can be controlled and switched by controlling the corresponding dosing valve 1302. Figure 1When the left-side dosing pump 1303 is running, the dosing valve 1302 on the right-side dosing pipe 1301 is closed, and the dosing valve 1302 on the left-side dosing pipe 1301 and the end control valves 1308 on both dosing pipes 1302 are opened. At this time, the dosing connecting valve 1307 on one of the dosing connecting pipes 1306 needs to be opened accordingly. The dosing pump 1303 is connected to the return pipe 14, and the corresponding return pipe 14 is controlled by the corresponding return valve 15.

[0043] This embodiment of the utility model, through the combination of submersible pump 103 and dosing tank 5, pipeline connection, and control valve, can achieve free switching, thereby realizing the safe, stable, and precise dosing of powdered activated carbon under different water qualities, and has strong adaptability.

[0044] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this utility model.

Claims

1. A pipeline-type powdered activated carbon dosing device, characterized in that, include: Several dissolving tanks (5), each dissolving tank (5) is equipped with a level gauge, and a stirring assembly (7) is installed inside it. A water inlet and a dosing port (6) are opened at the top of the tank, and a dosing port is opened at the bottom of the tank. A water inlet branch pipe (3) is connected to the water inlet, and a water inlet valve (4) is installed on the water inlet branch pipe (3). The water inlet branch pipes (3) installed on several dissolving tanks (5) are all connected to the same water inlet main pipe (2), and a water pumping assembly (1) for injecting water into the dissolving tank (5) is connected to the water inlet main pipe (2). The outlet is connected to a branch pipe (11), and a valve (12) is installed on the branch pipe (11). The branch pipes (11) installed on the dissolving tanks (5) are all connected to the same main pipe (10). The main pipe (10) is connected to a dosing assembly (13) that pumps the mixed liquid inside the dissolving tank (5) into the raw water supply pipe (16).

2. The pipeline-type powdered activated carbon dosing device according to claim 1, characterized in that: The pumping assembly (1) includes a main pumping pipe (101) connected to the main inlet pipe (2). The inlet end of the main pumping pipe (101) is connected to two branch pumping pipes (102). Each of the two branch pumping pipes (102) is equipped with a submersible pump (103), and a pumping valve (104) is also provided on the branch pumping pipe (102) at the outlet end of the submersible pump (103).

3. The pipeline-type powdered activated carbon dosing device according to claim 1, characterized in that: It also includes a backwash pipe (8) provided for the corresponding dissolving tank (5). The inlet end of the backwash pipe (8) is connected to the main inlet pipe (2), and its outlet end is connected to the outlet branch pipe (11) on the outlet side of the outlet valve (12). A backwash valve (9) is also provided on the backwash pipe (8).

4. The pipeline-type powdered activated carbon dosing device according to claim 1, characterized in that: The dosing assembly (13) includes two dosing pipes (1301). One end of each dosing pipe (1301) is connected to the main outlet pipe (10), and the other end is connected to the corresponding raw water transmission pipe (16). A dosing valve (1302), a dosing pump (1303), a dosing valve (1302), and an end control valve (1308) are installed sequentially on the pipe body from the inlet end to the outlet end. The two dosing pipes (1301) are connected by a dosing connecting pipe (1306). Two dosing connection pipes (1306) are provided. The connection point of one dosing connection pipe (1306) is located between the outlet end of the dosing pump (1303) and the dosing valve (1302). The connection point of the other dosing connection pipe (1306) is located between the dosing valve (1302) on the outlet side of the dosing pump (1303) and the terminal control valve (1308). Both dosing connection pipes (1306) are provided with dosing connection valves (1307).

5. The pipeline-type powdered activated carbon dosing device according to claim 4, characterized in that: A pressure gauge (1304) is also installed on the dosing pipe (1301) between the dosing connection point (1306) near the end control valve (1308) and the dosing valve (1302).

6. The pipeline-type powdered activated carbon dosing device according to claim 5, characterized in that: An exhaust valve (1305) is also provided on the dosing pipe (1301) between the dosing connection point (1306) near the end control valve (1308) and the dosing valve (1302).

7. The pipeline-type powdered activated carbon dosing device according to claim 5, characterized in that: It also includes two return pipes (14), one end of which is connected to the dosing pipe (1301) between the outlet of the dosing pump (1303) and the dosing valve (1302), and the other end is connected to the return port at the top of the dissolving tank (5), and a return valve (15) is provided on the return pipe (14).

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