Chemical adding device and method in water taking head of seawater taking system

Abstract

The invention discloses a dosing device and method in a water taking head of a seawater taking system, the device comprises a water taking head box body, a plurality of water inlets are uniformly formed in the bottom of the water taking head box body at intervals, the top of the water taking head box body is opened and is connected with a water pump water suction pipe through a head water outlet flange, and a medicament water distribution main pipe is arranged in the water taking head box body; the head end of the agent water distribution main pipe extends out of the side wall of the water taking head box and is connected with an agent adding pipe through an agent inlet flange, a plurality of agent water distribution branch pipes are evenly arranged on the agent water distribution main pipe at intervals, and a plurality of agent water distribution holes are formed in the upper portions of the agent water distribution branch pipes. According to the device, chemicals are added in a manner of uniformly distributing water through the fine chemicals adding pipe, and a negative pressure operation manner is adopted, so that stable operation of a seawater taking system can be ensured, the waste of chemicals is reduced, the chemicals are prevented from flowing back into the marine environment, and the marine ecological environment is protected.

Description

Technical Field

[0001] The present invention belongs to the technical field of seawater intake, and in particular relates to a dosing device in a water intake head of a seawater intake system, and also relates to a dosing method in a water intake head of a seawater intake system. Background Art

[0002] With the rapid development of seawater desalination, the amount of seawater intake is increasing. The seawater intake system is mainly composed of water pumps, pipes and valve accessories. At present, the main way to add drugs to the seawater intake system is to add drugs inside the water pump or at the back end of the water pump. This method cannot inhibit the growth of marine organisms such as sponges, corals, algae, marine bacteria, etc. at the water intake head, which will cause the water suction end to be blocked and the water intake volume cannot meet the requirements. At the same time, it is difficult to repair and clean the water. There are fewer ways to add drugs at the water pump suction head. Adding drugs at the water suction head may cause the drugs to flow back into the marine environment, causing damage to the marine biological environment. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention proposes a dosing device and method in a water intake head of a seawater intake system.

[0004] The technical solution adopted by the present invention is a dosing device in the water intake head of a seawater intake system, comprising a water intake head box body, a plurality of water inlets evenly spaced at the bottom of the water intake head box body, an opening at the top of the water intake head box body and connected to a water pump suction pipe through a head water outlet flange, a chemical water distribution main pipe is provided in the water intake head box body, the head end of the chemical water distribution main pipe extends out of the side wall of the water intake head box body and is connected to the dosing pipe through a chemical inlet flange, a plurality of chemical water distribution branches are evenly spaced at the top of the chemical water distribution branch pipe, and a plurality of chemical water distribution holes are opened above the chemical water distribution branch pipe.

[0005] Furthermore, the above-mentioned chemical water distribution main is arranged horizontally in the middle of the lower end of the water intake head box, and multiple chemical water distribution branches are arranged longitudinally on both sides of the chemical water distribution main, and the water inlet corresponding to the chemical water distribution holes is arranged on both sides of the chemical water distribution branch.

[0006] Furthermore, the diameter of the above-mentioned chemical water distribution main pipe is 25-50mm, the diameter of the chemical water distribution branch pipe is 15-25mm, the diameter of the chemical water distribution hole is 4-8mm, and the diameter of the water inlet is 8-36mm.

[0007] Furthermore, a guide plate is provided at the top of the water intake head box. The guide plate is conical in shape, with the top being retracted and welded to the top of the water intake head box, and the bottom being expanded and welded to the inner wall of the water intake head box.

[0008] Furthermore, a water inlet grille is provided at the water inlet. The cross section of the water inlet grille is trapezoidal, including a horizontal portion at the top and an inclined portion on the side. A plurality of water inlet holes are provided on the water inlet grille. The water inlet holes in the horizontal portion are vertically upward, and the water inlet holes in the inclined portion are inclined outward.

[0009] A method for adding medicine into a water intake head of a seawater intake system, the method comprising: Step 1: Install the water intake head box below the seawater level; Step 2: Connect the medicine inlet flange to the dosing pipe; Step 3: Connect the water outlet flange of the water intake head to the water pump suction pipe; Step 4: Turn on the water intake pump, and water flows into the water intake head box through the water inlet of the water intake head, and enters the water pump through the water outlet flange on the water intake head box. After the water pump runs stably for 10 seconds, a negative pressure area is generated in the water intake head box. Open the dosing pipe of the dosing device to allow the chemical to enter the chemical water distribution main pipe through the chemical inlet flange, and then enter the chemical water distribution branch pipe, and enter the water intake head box through the chemical water distribution hole. After fully contacting and mixing with seawater in the negative pressure mixing area, it enters the water pump through the water outlet flange on the water intake head box.

[0010] Furthermore, after the above-mentioned dosing and water intake are completed, the dosing device is first closed to stop the agent from entering the agent inlet flange, and the water pump continues to run for 10 seconds; then the water pump is closed so that the water out of the water outlet flange of the water intake head box does not enter the water pump.

[0011] Compared with the existing technology, the beneficial effect of the present invention is that a dosing device is arranged in the water intake head box, and the dosing method adopts a small dosing pipe to evenly distribute water for dosing, and adopts a negative pressure operation method, which can ensure the stable operation of the seawater intake system, reduce the waste of medicines, prevent the medicines from flowing back into the marine environment, and protect the marine ecological environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 A top view of the present invention; Figure 3 is a top view of the deflector; Figure 4 This is a cross-sectional view of the water inlet grille. DETAILED DESCRIPTION

[0013] The present invention will be further explained below with reference to the accompanying drawings to facilitate better understanding by those skilled in the art.

[0014] Example 1 like Figure 1-4As shown, a dosing device in a water intake head of a seawater intake system comprises a water intake head box body 1, a plurality of water inlets 2 are evenly spaced apart at the bottom of the water intake head box body 1, the top of the water intake head box body 1 is open and is connected to a water pump suction pipe through a head water outlet flange 3, a chemical water distribution main pipe 4 is provided in the water intake head box body 1, the head end of the chemical water distribution main pipe 4 extends out of the side wall of the water intake head box body 1 and is connected to a dosing pipe through a chemical inlet flange 5, a plurality of chemical water distribution branch pipes 6 are evenly spaced apart on the chemical water distribution main pipe 4, and a plurality of chemical water distribution holes 7 are provided above the chemical water distribution branch pipe 6. Specifically, the diameter of the above-mentioned medicine water distribution main pipe 5 is 25-50mm, which transports the medicine to the medicine water distribution branch pipe. The diameter of the medicine water distribution branch pipe 6 is 15-25mm, which transports the medicine to the medicine water distribution hole. The diameter of the medicine water distribution hole 7 is 4-8mm, which evenly disperses the medicine into the water. The diameter of the water inlet 2 is 8-36mm, which can be adjusted according to the suspended matter, plankton, etc. in the seawater. The function of the water inlet of the water intake head is to introduce the seawater outside the water intake head into the water intake head, and prevent larger marine organisms, suspended matter, etc. from entering the water intake head. The water intake head box 1 is used to isolate the seawater inside and outside the water intake head, and make the medicine and seawater fully mixed. A dosing device is set in the water intake head box 1. The dosing method adopts the method of evenly distributing water with a small dosing pipe to dosing. Through the negative pressure operation method, it can ensure the stable operation of the seawater intake system, reduce the waste of medicine, prevent the medicine from flowing back into the marine environment, and protect the marine ecological environment.

[0015] In order to improve the mixing effect of the medicine and seawater, the above-mentioned medicine water distribution main pipe 5 is arranged horizontally in the middle of the lower end of the water intake head box 1, and multiple medicine water distribution branch pipes 6 are arranged longitudinally on both sides of the medicine water distribution main pipe 5. The medicine water distribution holes 7 corresponding to the water inlet 2 are arranged on both sides of the medicine water distribution branch pipe 6, and the medicine is driven upward for mixing through the water intake.

[0016] Furthermore, a guide plate 8 is provided at the top of the water intake head box 1. The guide plate 8 is conical in shape. The top of the guide plate 8 is retracted and welded to the top of the water intake head box 1, and the bottom is expanded outward and welded to the inner wall of the water intake head box. The guide plate 8 evenly guides the water flow into the water outlet to prevent the growth of microorganisms.

[0017] Furthermore, a water inlet grille 9 is provided at the water inlet 2, which is snap-fitted to the water inlet for easy cleaning and replacement; the water inlet grille 9 has a trapezoidal cross-section, and the main body is a frustum with a small top and a large bottom. The water inlet grille 9 includes a horizontal portion 901 at the top and an inclined portion 902 on the side. The horizontal portion 901 and the inclined portion 902 both have a set thickness to meet the requirement that a plurality of water inlet holes 10 with guiding functions are opened on the horizontal portion 901 and the inclined portion 902. The water inlet holes 10 of the horizontal portion 901 are vertically upward, and the water inlet holes 10 of the inclined portion 902 are respectively inclined outward, changing the direction and flow rate of water entering the water intake head box 8, and forming a jet-like water body to fully mix with the medicine flowing out of the medicine distribution hole.

[0018] Example 2 A method for adding medicine into a water intake head of a seawater intake system, the method comprising two steps: starting water intake and stopping water intake. The starting steps are: Step 1: Install the water intake head box below the seawater level; Step 2: Connect the medicine inlet flange to the dosing pipe; Step 3: Connect the water outlet flange of the water intake head to the water pump suction pipe; Step 4: Turn on the water intake pump, and water flows into the water intake head box through the water inlet of the water intake head, and enters the water pump through the water outlet flange on the water intake head box. After the water pump runs stably for 10 seconds, a negative pressure area is generated in the water intake head box. Open the dosing pipe of the dosing device to allow the chemical to enter the chemical water distribution main pipe through the chemical inlet flange, and then enter the chemical water distribution branch pipe, and enter the water intake head box through the chemical water distribution hole. After fully contacting and mixing with seawater in the negative pressure mixing area, it enters the water pump through the water outlet flange on the water intake head box.

[0019] After the above-mentioned dosing and water extraction are completed, stop extracting water. First, close the dosing device to stop the agent from entering the agent inlet flange, and wait for the water pump to continue running for 10 seconds; then close the water pump so that the water out of the water outlet flange of the water intake head box does not enter the water pump.

[0020] The above start and stop methods can prevent the agent from flowing back into the marine environment, and the agent can be fully mixed with seawater, thereby reducing the waste of the agent, saving operating costs, and increasing the reliability of the water intake system operation.

[0021] The above-described embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit and principles of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A dosing device in the water intake head of a seawater intake system, characterized in that: The invention comprises a water intake head box (1), wherein a plurality of water inlets (2) are evenly spaced at the bottom of the water intake head box (1), the top of the water intake head box (1) is open and connected to a water pump suction pipe through a head water outlet flange (3), a medicine water distribution main pipe (4) is provided in the water intake head box (1), the head end of the medicine water distribution main pipe (4) extends out of the side wall of the water intake head box (1) and is connected to a dosing pipe through a medicine inlet flange (5), a plurality of medicine water distribution branch pipes (6) are evenly spaced on the medicine water distribution main pipe (4), and a plurality of medicine water distribution holes (7) are provided above the medicine water distribution branch pipes (6).

2. The dosing device in the water intake head of a seawater intake system according to claim 1, characterized in that: The medicine water distribution main pipe is arranged transversely in the middle of the lower end of the water intake head box, and a plurality of medicine water distribution branch pipes (6) are arranged longitudinally on both sides of the medicine water distribution main pipe (4). The water inlet (2) corresponds to the medicine water distribution holes (7) and is arranged on both sides of the medicine water distribution branch pipes (6).

3. The dosing device in the water intake head of a seawater intake system according to claim 2, characterized in that: The diameter of the medicine water distribution main pipe (4) is 25-50 mm, the diameter of the medicine water distribution branch pipe (6) is 15-25 mm, the diameter of the medicine water distribution hole (7) is 4-8 mm, and the diameter of the water inlet (2) is 8-36 mm.

4. The dosing device in the water intake head of a seawater intake system according to claim 1, characterized in that: A guide plate (8) is provided at the top of the water intake head box (1). The guide plate (8) is conical in shape, with a top end that is retracted and welded to the top of the water intake head box (1), and a bottom end that is expanded and welded to the inner wall of the water intake head box (1).

5. The dosing device in the water intake head of a seawater intake system according to claim 1, characterized in that: A water inlet grille (9) is provided at the water inlet (2). The water inlet grille (9) has a trapezoidal cross section and includes a horizontal portion (901) at the top and an inclined portion (902) at the side. A plurality of water inlet holes (10) are provided on the water inlet grille (9). The water inlet holes (10) of the horizontal portion (901) face vertically upward, while the water inlet holes (10) of the inclined portion (902) face outwardly.

6. A method for adding medicine in the water intake head of a seawater intake system according to claims 1-5, characterized in that: The method is: Step 1: Install the water intake head box below the seawater level; Step 2: Connect the medicine inlet flange to the dosing pipe; Step 3: Connect the water outlet flange of the water intake head to the water pump suction pipe; Step 4: Turn on the water intake pump, and water flows into the water intake head box through the water inlet of the water intake head, and enters the water pump through the water outlet flange on the water intake head box. After the water pump runs stably for 10 seconds, a negative pressure area is generated in the water intake head box. Open the dosing pipe of the dosing device to allow the chemical to enter the chemical water distribution main pipe through the chemical inlet flange, and then enter the chemical water distribution branch pipe, and enter the water intake head box through the chemical water distribution hole. After fully contacting and mixing with seawater in the negative pressure mixing area, it enters the water pump through the water outlet flange on the water intake head box.

7. The method for adding medicine in the water intake head of a seawater intake system according to claim 6, characterized in that: After the above-mentioned dosing and water intake are completed, first close the dosing device to stop the agent from entering the agent inlet flange, and wait for the water pump to continue running for 10 seconds; then close the water pump so that the water out of the water outlet flange of the water intake head box does not enter the water pump.

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