Safe and energy-saving dosing system for reclaimed water treatment system

Abstract

The utility model discloses a safe and energy-saving dosing system for a reclaimed water treatment system. The safe and energy-saving dosing system comprises a first dosing tank, a second dosing tank, a first dosing pipe, a second dosing pipe, a first valve and a second valve, a disinfectant and a phosphorus removal agent are respectively contained in the first dosing tank and the second dosing tank, and the first dosing tank and the second dosing tank are both mounted on a platform above a sand filter tower in the reclaimed water treatment system; one end of the first dosing pipe is communicated and fixedly connected with the bottom end of the first dosing tank, and the other end of the first dosing pipe is communicated and fixedly connected with the water inlet end of the sand filter tower; one end of the second dosing pipe is communicated and fixedly connected with the bottom end of the second dosing tank, and the other end of the second dosing pipe is communicated and fixedly connected with the water inlet end of the sand filter tower; the first valve is mounted on the first dosing pipe, and the second valve is mounted on the second dosing pipe. The chemical feeding tank is arranged above the sand filter tower, gravity chemical feeding is achieved through the height difference, a metering pump is omitted, the length of a chemical feeding pipe is shortened, and the smooth, safe and energy-saving chemical feeding effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment dosing, and in particular, to a safe and energy-saving dosing system for a reclaimed water treatment system. Background Art

[0002] Recycled water reuse refers to treating urban sewage or domestic sewage to meet certain water quality standards and reuse it as a renewable resource. Due to the stable amount of sewage and economical infrastructure investment, many countries regard recycled water reuse as the preferred solution to solve the water shortage problem. The recycled water treatment system includes pretreatment, anaerobic and aerobic treatment, deep treatment, disinfection treatment, biogas treatment, waste gas treatment, sludge treatment, etc. Among them, the disinfection treatment includes the dosing link, that is, adding corresponding disinfectants and dephosphorizers to the water inlet end of the secondary sand filter tank. The commonly used disinfectants and dephosphorizers are chlorine dioxide and ferric chloride, respectively. Since the production of chlorine dioxide requires hydrochloric acid and sodium chlorate, and hydrochloric acid and sodium chlorate are both hazardous chemicals, they require special protection in procurement, transportation, storage, and use, which brings certain difficulties to the management of hazardous chemicals; due to the high chroma of ferric chloride, the chroma of the recycled water will be yellowish, and it will be difficult to remove the chroma later. In the existing dosing system, a metering pump is required to pump the agent from the dosing tank into the water inlet of the 8-meter-high sand filter tower. The dosing pipeline is about 40 meters long. During the dosing process, dripping, blockage, and uneven dosing are inevitable, which is not conducive to the maintenance of maintenance personnel and the safety of operating personnel. In addition, the metering pump is prone to blockage and damage, and often needs to be repaired or replaced, resulting in high costs and high energy consumption. Summary of the invention

[0003] In order to solve at least one aspect of the above problems, the utility model provides a safe and energy-saving dosing system for a reclaimed water treatment system, which achieves smooth, safe and energy-saving dosing by arranging a dosing tank above a sand filter tower and using the height difference to achieve gravity dosing, eliminating the metering pump and shortening the length of the dosing pipe. The utility model is implemented through the following technical solutions:

[0004] A safe and energy-saving dosing system for a reclaimed water treatment system comprises a first dosing tank, a second dosing tank, a first dosing pipe, a second dosing pipe, a first valve and a second valve; the first dosing tank and the second dosing tank are respectively filled with a disinfectant and a dephosphorizing agent, and the first dosing tank and the second dosing tank are both installed on a platform above a sand filter tower in the reclaimed water treatment system; one end of the first dosing pipe is connected to and fixedly connected with the bottom end of the first dosing tank, and the other end is connected to and fixedly connected with the water inlet end of the sand filter tower; one end of the second dosing pipe is connected to and fixedly connected with the bottom end of the second dosing tank, and the other end is connected to and fixedly connected with the water inlet end of the sand filter tower; the first valve is installed on the first dosing pipe, and the second valve is installed on the second dosing pipe.

[0005] Preferably, a first flow meter is installed on the first dosing tube, and a second flow meter is installed on the second dosing tube, for respectively monitoring the flow of the agent in the first dosing tube and the second dosing tube.

[0006] Preferably, a first liquid level gauge is installed in the first dosing tank to monitor the liquid level of the disinfectant in the first dosing tank; a second liquid level gauge is installed in the second dosing tank to monitor the liquid level of the dephosphorization agent in the second dosing tank; the dosing system also includes a host computer, and the first liquid level gauge and the second liquid level gauge are both communicatively connected to the host computer, so that when the first liquid level gauge and / or the second liquid level gauge detects that the liquid level signal is lower than a preset value, the host computer displays an alarm message.

[0007] Preferably, the disinfectant is sodium hypochlorite.

[0008] Preferably, the dosing rate of the sodium hypochlorite is 2-6 L / h.

[0009] Preferably, it also includes a buffer tank, which is arranged on the same horizontal plane as the first dosing tank, and the buffer tank is connected to the first dosing tank through a connecting pipe.

[0010] Preferably, the phosphorus removal agent is polyaluminium chloride.

[0011] Preferably, the dosing rate of the polyaluminium chloride is 5-10 L / h.

[0012] Preferably, the sand filter tower is fixedly installed on the ground of the first floor, the first dosing tank and the second dosing tank are both installed on the ground of the third floor of the same building as the sand filter tower, and the first dosing tank and the second dosing tank are both close to the sand filter tower.

[0013] Preferably, a support frame is arranged below the first dosing tank and the second dosing tank, the bottom end of the support frame is fixedly connected to the third floor, the base of the first dosing tank and the base of the second dosing tank are both fixedly connected to the top surface of the support frame; a protective plate is laid at the bottom of the support frame.

[0014] Preferably, the height of the support frame is 0.3-0.7 m.

[0015] The utility model is a safe and energy-saving dosing system for a reclaimed water treatment system, which has the following beneficial effects:

[0016] By arranging the first dosing tank and the second dosing tank respectively containing disinfectant and dephosphorizing agent above the sand filter tower, gravity dosing is achieved by utilizing the height difference, the metering pump is eliminated and the length of the dosing pipe is shortened, thereby achieving a smooth, safe and energy-saving dosing effect; further, the sand filter tower and the first dosing tank and the second dosing tank are respectively arranged on the first floor and the third floor, and gravity dosing is achieved by utilizing the height difference between different floors in the same building, which is also helpful for staff to repair and replenish medicines; by arranging a support frame with a protective plate under the first dosing tank and the second dosing tank, corrosion and oxidation of the ground caused by dripping or splashing of the agent can be effectively avoided; by adopting sodium hypochlorite as a disinfectant, on the basis of the same sterilization and disinfection effect, the storage and use of hazardous chemicals are reduced, which helps to improve the safety of the dosing system of the present application; by adopting polyaluminum chloride as a dephosphorizing agent, on the basis of the same dephosphorization and clarification effect, it helps to reduce the influence of chemical reagents on the chromaticity of water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0018] Figure 1 A block diagram of a safe and energy-saving dosing system for a reclaimed water treatment system according to an embodiment of the utility model is shown;

[0019] Figure 2 A vertical view of a safe and energy-saving dosing system for a reclaimed water treatment system according to an embodiment of the utility model is shown.

[0020] Description of reference numerals:

[0021] 1. The first dosing tank; 2. The second dosing tank; 3. The first valve; 4. The second valve; 5. The first flow meter; 6. The second flow meter; 7. The first liquid level meter; 8. The second liquid level meter; 9. The host computer; 10. The sand filter tower; 11. The support frame; 12. The buffer tank. DETAILED DESCRIPTION

[0022] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0023] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0024] In order to at least partially solve one or more of the above-mentioned problems and other potential problems, an embodiment of the present disclosure proposes a safe and energy-saving dosing system for a reclaimed water treatment system, comprising a first dosing tank 1, a second dosing tank 2, a first dosing pipe, a second dosing pipe, a first valve 3 and a second valve 4; the first dosing tank 1 and the second dosing tank 2 are respectively filled with disinfectant and dephosphorization agent, and the first dosing tank 1 and the second dosing tank 2 are both installed on a platform above a sand filter tower 10 in the reclaimed water treatment system; one end of the first dosing pipe is connected to and fixedly connected to the bottom end of the first dosing tank 1, and the other end is connected to and fixedly connected to the water inlet end of the sand filter tower 10; one end of the second dosing pipe is connected to and fixedly connected to the bottom end of the second dosing tank 2, and the other end is connected to and fixedly connected to the water inlet end of the sand filter tower 10; the first valve 3 is installed on the first dosing pipe, and the second valve 4 is installed on the second dosing pipe.

[0025] Specifically, Figure 1 and Figure 2 As shown, the first dosing tank 1 and the second dosing tank 2 are respectively filled with disinfectant and dephosphorization agent, and the first dosing tank 1 and the second dosing tank 2 are both vertically installed on a platform above the sand filter tower 10 in the reclaimed water treatment system. Preferably, the sand filter tower 10 is fixedly installed on the ground of the first floor, and the first dosing tank 1 and the second dosing tank 2 are both installed on the ground of the third floor of the same building as the sand filter tower 10, and the first dosing tank 1 and the second dosing tank 2 are both close to the sand filter tower 10; more preferably, a support frame 11 is provided below the first dosing tank 1 and the second dosing tank 2, and the height of the support frame 11 is preferably 0.3 to 0.7 m. In the present embodiment, the height of the support frame 11 is 0.5 m, and the bottom end of the support frame 11 is fixedly connected to the ground of the third floor, and the base of the first dosing tank 1 and the base of the second dosing tank 2 are both fixedly connected to the top surface of the support frame 11; a protective plate made of fiberglass is fixedly laid on the bottom of the support frame 11.

[0026] The first dosing pipe runs through the third floor, one end of the first dosing pipe is connected to and fixedly connected with the bottom end of the first dosing tank 1, and the other end is connected to and fixedly connected with the water inlet end of the sand filter tower 10; the second dosing pipe runs through the third floor, one end of the second dosing pipe is connected to and fixedly connected with the bottom end of the second dosing tank 2, and the other end is connected to and fixedly connected with the water inlet end of the sand filter tower 10; the first valve 3 is installed on the first dosing pipe, and the second valve 4 is installed on the second dosing pipe, which are used to control the start and end of dosing and the dosing speed of the first dosing tank 1 and the second dosing tank 2 respectively; further, a first flow meter 5 is installed on the first dosing pipe, and a second flow meter 6 is installed on the second dosing pipe, which are used to monitor the first dosing pipe and the second dosing pipe, respectively. The flow rate of the medicine in the medicine tube and the second medicine dosing tube, the first flow meter 5 and the second flow meter 6 are preferably rotor flow meters; preferably, a first liquid level meter 7 is installed in the first dosing tank 1, which is used to monitor the liquid level of the disinfectant in the first dosing tank 1; a second liquid level meter 8 is installed in the second dosing tank 2, which is used to monitor the liquid level of the dephosphorization agent in the second dosing tank 2, and the first liquid level meter 7 and the second liquid level meter 8 are preferably ultrasonic level meters; the dosing system also includes a host computer 9, and the first liquid level meter 7 and the second liquid level meter 8 are both communicatively connected to the host computer 9, and are used to display an alarm message on the host computer 9 when the first liquid level meter 7 and / or the second liquid level meter 8 detects that the liquid level signal is lower than a preset value.

[0027] Preferably, the disinfectant is sodium hypochlorite, and the dosing rate of sodium hypochlorite is preferably 2 to 6 L / h. In the present embodiment, the dosing rate of sodium hypochlorite is 4 L / h. Furthermore, the dosing system of the present application also includes a cache tank 12, and the cache tank 12 and the first dosing tank 1 are arranged on the same horizontal plane. In the present embodiment, the cache tank 12 is fixedly mounted on the top surface of the support frame 11, and the cache tank 12 and the first dosing tank 1 are connected through a connecting pipe.

[0028] Preferably, the phosphorus removal agent is polyaluminium chloride, and the dosing rate of polyaluminium chloride is preferably 5 to 10 L / h. In the present embodiment, the dosing rate of polyaluminium chloride is 7 L / h.

[0029] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the present invention.

Claims

1. A safe and energy-saving dosing system for a reclaimed water treatment system, characterized in that: It comprises a first dosing tank (1), a second dosing tank (2), a first dosing pipe, a second dosing pipe, a first valve (3) and a second valve (4); The first dosing tank (1) and the second dosing tank (2) are respectively filled with a disinfectant and a dephosphorizing agent, and the first dosing tank (1) and the second dosing tank (2) are both installed on a platform located above a sand filter tower (10) in a reclaimed water treatment system; One end of the first dosing pipe is connected to and fixedly connected to the bottom end of the first dosing tank (1), and the other end is connected to and fixedly connected to the water inlet end of the sand filter tower (10); one end of the second dosing pipe is connected to and fixedly connected to the bottom end of the second dosing tank (2), and the other end is connected to and fixedly connected to the water inlet end of the sand filter tower (10); The first valve (3) is installed on the first dosing pipe, and the second valve (4) is installed on the second dosing pipe.

2. A safe and energy-saving dosing system for a reclaimed water treatment system according to claim 1, characterized in that: The first dosing pipe is provided with a first flow meter (5), and the second dosing pipe is provided with a second flow meter (6), which are used to monitor the flow rates of the medicine in the first dosing pipe and the second dosing pipe respectively.

3. A safe and energy-saving dosing system for a reclaimed water treatment system according to claim 1, characterized in that: The first dosing tank (1) is provided with a first liquid level meter (7) for monitoring the liquid level of the disinfectant in the first dosing tank (1); the second dosing tank (2) is provided with a second liquid level meter (8) for monitoring the liquid level of the dephosphorizing agent in the second dosing tank (2); the dosing system further comprises a host computer (9), the first liquid level meter (7) and the second liquid level meter (8) are both communicatively connected to the host computer (9), and when the first liquid level meter (7) or / and the second liquid level meter (8) detects that the liquid level signal is lower than a preset value, the host computer (9) displays an alarm message.

4. A safe and energy-saving dosing system for a reclaimed water treatment system according to claim 1, characterized in that: The disinfectant is sodium hypochlorite.

5. A safe and energy-saving dosing system for a reclaimed water treatment system according to claim 4, characterized in that: The dosing speed of the sodium hypochlorite is 2-6 L / h.

6. A safe and energy-saving dosing system for a reclaimed water treatment system according to claim 4, characterized in that: It also comprises a buffer tank (12), the buffer tank (12) and the first dosing tank (1) are arranged on the same horizontal plane, and the buffer tank (12) and the first dosing tank (1) are connected via a connecting pipe.

7. A safe and energy-saving dosing system for a reclaimed water treatment system according to claim 1, characterized in that: The dephosphorizing agent is polyaluminium chloride.

8. A safe and energy-saving dosing system for a reclaimed water treatment system according to claim 7, characterized in that: The adding speed of the polyaluminium chloride is 5 to 10 L / h.

9. A safe and energy-saving dosing system for a reclaimed water treatment system according to claim 1, characterized in that: The sand filter tower (10) is fixedly installed on the ground of the first floor, and the first dosing tank (1) and the second dosing tank (2) are both installed on the ground of the third floor of the same building as the sand filter tower (10), and the first dosing tank (1) and the second dosing tank (2) are both close to the sand filter tower (10).

10. A safe and energy-saving dosing system for a reclaimed water treatment system according to claim 9, characterized in that: A support frame (11) is arranged below the first dosing tank (1) and the second dosing tank (2); the bottom end of the support frame (11) is fixedly connected to the ground of the third floor; the base of the first dosing tank (1) and the base of the second dosing tank (2) are both fixedly connected to the top surface of the support frame (11); and a protective plate is laid on the bottom of the support frame (11).

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