A sewage dosing pretreatment system

Abstract

The invention discloses a sewage dosing pretreatment system, comprising a sewage collection tank, the sewage collection tank is connected to a first dosing pipeline and a second dosing pipeline, the first dosing pipeline is provided with a first delivery pump and a first pipeline mixer, the second dosing pipeline is provided with a second delivery pump and a second pipeline mixer, the first dosing pipeline is provided with a first upstream control valve and a first downstream control valve; the second dosing pipeline is provided with a second upstream control valve and a second downstream control valve; the downstream sections of the first dosing pipeline and the second dosing pipeline are collected and connected to a total delivery pipeline, a series branch is provided between the outlet of the first delivery pump and the inlet of the second delivery pump or between the inlet of the first delivery pump and the outlet of the second delivery pump, and a branch control valve is provided on the series branch. The dosing pretreatment system can not only be maintained without stopping the machine, but also can increase the delivery power when high-power delivery is required to reduce costs.

Description

Technical Field

[0001] The invention relates to a sewage dosing pretreatment system, which is used for sewage pretreatment. Background Art

[0002] In the current field of sewage treatment technology, after sewage enters the sewage collection tank, it needs to be pre-treated before it can be sent to the downstream clarification tank for sedimentation. The current treatment system is to add PAC and PAM during the transportation process to accelerate the sedimentation of particulate sludge in the sewage in the clarification tank. However, this pretreatment system still has the following disadvantages: 1. The added PAC and PAM are not mixed evenly, so the dosage needs to be increased, resulting in increased costs; 2. The current pretreatment system's delivery power is delivered through a delivery pump, but the power of the delivery pump is certain. Therefore, in order to meet special delivery requirements, the power of the delivery pump will have a certain margin, so it is necessary to select a delivery pump with a larger power, which further increases costs; 3. The current pretreatment system's delivery is just a simple delivery pipeline. Once the delivery pump fails, the delivery can only be shut down, thereby affecting the sewage treatment efficiency, which causes a very large economic loss to the sewage treatment plant. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a sewage dosing pretreatment system, which can not only be maintained without stopping the system, but also increase the transmission power when high-power transmission is required to reduce costs.

[0004] To solve the above technical problems, the technical solution of the present invention is: a sewage dosing pretreatment system, comprising a sewage collection tank, the outlet of the sewage collection tank is connected to two parallel first dosing pipelines and a second dosing pipeline, the first dosing pipeline is provided with a first delivery pump and a first pipeline mixer, the second dosing pipeline is provided with a second delivery pump and a second pipeline mixer, the first dosing pipeline is provided with a first upstream control valve located upstream of the first delivery pump, and a first downstream control valve is provided downstream of the first pipeline mixer; the second dosing pipeline is provided with a second upstream control valve located upstream of the second delivery pump, and a second downstream control valve is provided downstream of the second pipeline mixer; the downstream sections of the first dosing pipeline and the second dosing pipeline are converged and connected to a total delivery pipeline, a series branch is provided between the outlet of the first delivery pump and the inlet of the second delivery pump or between the inlet of the first delivery pump and the outlet of the second delivery pump, and a branch control valve is provided on the series branch.

[0005] As a preferred solution, the number of the first pipeline mixers is two, the number of the second pipeline mixers is two, the two first pipeline mixers are connected to the PAC addition system and the PAM addition system respectively, and the two second pipeline mixers are connected to the PAC addition system and the PAM addition system respectively.

[0006] As a preferred solution, the first pipeline mixer includes a drug adding pipeline, an outer fixing ring, a central axis 1, a central axis 2, a fixing frame, a drug inlet port and a mixing blade;

[0007] The dosing pipe is provided with a water inlet end on one side and a water outlet end on the other side, and a first mixing section and a second mixing section are provided inside the dosing pipe, wherein the first mixing section is connected to the second mixing section;

[0008] The first mixing section is connected to the water inlet, and the second mixing section is connected to the water outlet;

[0009] The two outer fixing rings are fixedly mounted on the water inlet end and the water outlet end, a plurality of support rods are arranged on the outer fixing ring, a rotating seat is fixedly connected to the plurality of support rods, and the rotating seat is arranged at the center point of the outer fixing ring;

[0010] A plurality of water holes are formed between the plurality of support rods, and the plurality of water holes are evenly arranged on the outer fixing ring;

[0011] The mixing blades include left-handed blades and right-handed blades;

[0012] The central shaft 1 is rotatably mounted in the first mixing section, and the central shaft 2 is rotatably mounted in the second mixing section;

[0013] The left-handed blades are evenly arranged on the outer surface of the central axis 1, and the right-handed blades are evenly arranged on the outer surface of the central axis 2.

[0014] As a preferred solution, there are two fixing frames installed in the first mixing section and the second mixing section; a connecting seat is installed on the fixing frame, and a turbulent net is detachably installed on the fixing frame.

[0015] As a preferred solution, one end of the central axis one is rotatably connected to the rotating seat, and the other end is rotatably connected to the connecting seat; one end of the central axis two is rotatably connected to the connecting seat, and the other end is rotatably connected to the rotating seat.

[0016] As a preferred solution, the lengths of the left-handed blade and the right-handed blade are equal.

[0017] As a preferred solution, the pitches of the left-handed blade and the right-handed blade are equal.

[0018] As a preferred solution, the drug inlet pipe opening is installed on the upper surface of the drug adding pipeline; a conical drug inlet hole is arranged in the drug inlet pipe opening, and the drug inlet hole is connected to the first mixing section.

[0019] After adopting the above technical scheme, the effect of the present invention is as follows: since the sewage dosing pretreatment system includes a sewage collection tank, the outlet of the sewage collection tank is connected to two parallel first dosing pipelines and a second dosing pipeline, the first dosing pipeline is provided with a first delivery pump and a first pipeline mixer, the second dosing pipeline is provided with a second delivery pump and a second pipeline mixer, the first dosing pipeline is provided with a first upstream control valve located upstream of the first delivery pump, and a first downstream control valve located downstream of the first pipeline mixer; the second dosing pipeline is provided with a second upstream control valve located upstream of the second delivery pump, and a second downstream control valve located downstream of the second pipeline mixer; the downstream sections of the first dosing pipeline and the second dosing pipeline are connected to the main delivery pipeline together. A series branch is provided between the outlet of the first delivery pump and the inlet of the second delivery pump or between the inlet of the first delivery pump and the outlet of the second delivery pump, and a branch control valve is provided on the series branch. Therefore, during normal operation, the first dosing pipeline or the second dosing pipeline can be turned off, and only one of them can be used. When maintenance is required, one of them can be closed and the other can be used. This ensures that the pretreatment of sewage is continuous without shutting down. When pressurized delivery is required, the branch control valve can be opened, and one of the first upstream control valve or the second upstream control valve can be opened to connect the first delivery pump and the second delivery pump in series. In this way, the first delivery pump and the second delivery pump can work simultaneously to achieve a pressurization effect. The dosing pretreatment device has a reasonable structure and can reduce costs.

[0020] Furthermore, the first pipeline mixer includes a dosing pipeline, an outer fixing ring, a central axis 1, a central axis 2, a fixing frame, a dosing nozzle and mixing blades; a water inlet end is provided on one side of the dosing pipeline, a water outlet end is provided on the other side, and a first mixing section and a second mixing section are provided inside the dosing pipeline, the first mixing section is connected to the second mixing section; and the first mixing section is connected to the water inlet end, and the second mixing section is connected to the water outlet end; two outer fixing rings are fixedly installed on the water inlet end and the water outlet end, a plurality of support rods are provided on the outer fixing ring, a plurality of the support rods are fixedly connected to a rotating seat, and the rotating seat is provided at the center point of the outer fixing ring; a plurality of water holes are formed between the plurality of support rods, and the plurality of water holes are evenly arranged on the outer fixing ring; the mixing blades include left-handed blades and Right-handed blades; the central axis 1 is rotatably installed in the first mixing section, and the central axis 2 is rotatably installed in the second mixing section; the left-handed blades are evenly arranged on the outer surface of the central axis 1, and the right-handed blades are evenly arranged on the outer surface of the central axis 2. Therefore, in the dosing pipeline mixer, the two ends of the dosing pipeline are respectively provided with a water inlet end and a water outlet end, and two outer fixed rings are fixedly installed on the water inlet end and the water outlet end, which is convenient for sewage to flow through and improves the purification efficiency of sewage; and the central axis 1 and the central axis 2 are rotatably installed inside the dosing pipeline, and the blades on the central axis 1 and the central axis 2 are in opposite directions. The rotation of the central axis 1 and the central axis 2 under the impetus of the water flow can drive the sewage and the purification drug to mix, and the blades in opposite directions can improve the mixing efficiency of the water flow and the purification drug, and further improve the purification efficiency of the sewage.

[0021] In addition, a drug inlet port is provided on the drug adding pipeline, and a conical drug inlet hole is provided on the drug inlet port to improve the drug feeding efficiency; and this mixer has a simple structure, comprehensive functions, and a built-in turbulent flow net, which can fully mix the medicine and sewage, and is more worthy of popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the outer fixing ring of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the fixing frame of the present invention;

[0027] In the figure: 1, dosing pipeline; 101, water inlet end; 102, water outlet end; 103, first mixing section; 104, second mixing section; 2, outer fixing ring; 201, rotating seat; 202, support rod; 203, water hole; 3, central axis one; 301, left-handed blade; 4, central axis two; 401, right-handed blade 401; 5, fixing frame; 501, connecting seat; 502, turbulent flow net; 6, drug inlet pipe mouth; 601, drug inlet hole; 7, sewage collection tank; 8, first dosing pipeline; 9, second dosing pipeline; 10, series branch; 11, second delivery pump; 12, first delivery pump; 13, second upstream control valve; 14, first upstream control valve; 15, branch control valve; 16, first downstream control valve; 17, second downstream control valve; 18, first pipeline mixer; 19, second pipeline mixer. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below through specific examples.

[0029] like Figures 1 to 4 As shown, a sewage dosing pretreatment system includes a sewage collection tank 7. Sewage discharged by various sewage-discharging enterprises is centrally sent to the sewage collection tank 7 for collection. The outlet of the sewage collection tank 7 is connected to two parallel first dosing pipelines 8 and second dosing pipelines 9. The first dosing pipeline 8 is provided with a first delivery pump 12 and a first pipeline mixer 18. The second dosing pipeline 9 is provided with a second delivery pump 11 and a second pipeline mixer 19. The first dosing pipeline 8 is provided with a first upstream control valve 14 located upstream of the first delivery pump 12. The first upstream control valve 14 located upstream of the first pipeline mixer 19 is provided at the first upstream control valve 14. 18 is provided with a first downstream control valve 16; the second dosing pipeline 9 is provided with a second upstream control valve 13 upstream of the second delivery pump 11, and the second downstream control valve 17 is provided downstream of the second pipeline mixer 19; the downstream sections of the first dosing pipeline 8 and the second dosing pipeline 9 are connected to the main delivery pipeline, and a series branch 10 is provided between the outlet of the first delivery pump 12 and the inlet of the second delivery pump 11 or between the inlet of the first delivery pump 12 and the outlet of the second delivery pump 11, and a branch control valve 15 is provided on the series branch 10. In this embodiment, the series branch 10 is provided between the inlet of the first delivery pump 12 and the outlet of the second delivery pump 11.

[0030] At the same time, the sewage dosing pretreatment system of the present invention has the following three modes:

[0031] 1. The first dosing pipeline 8 is started and the second dosing pipeline 9 is closed. At this time, the first upstream control valve 14 and the first downstream control valve 16 are opened, and the second upstream control valve 13, the second downstream control valve 17 and the branch control valve 15 are closed; the sewage passes through the first dosing pipeline 8;

[0032] 2. The first dosing pipeline 8 is closed and the second dosing pipeline 9 is opened. At this time, the first upstream control valve 14, the branch control valve 15 and the first downstream control valve 16 are closed, and the second upstream control valve 13 and the second downstream control valve 17 are opened; the sewage passes through the second dosing pipeline 9;

[0033] The above two operation modes can facilitate maintenance without stopping the machine, making maintenance more convenient and avoiding economic losses caused by downtime.

[0034] 3. The first upstream control valve 14 and the second downstream control valve 17 are closed, and the second upstream control valve 13, the branch control valve 15 and the first downstream control valve 16 are opened. At this time, the sewage is first conveyed and pressurized by the second delivery pump 11, and then enters the first delivery pump 12 for further pressurization, thus achieving pressurized delivery.

[0035] There are two first pipeline mixers 18 and two second pipeline mixers 19. The two first pipeline mixers 18 are connected to the PAC adding system and the PAM adding system respectively, and the two second pipeline mixers 19 are connected to the PAC adding system and the PAM adding system respectively.

[0036] The first pipeline mixer 18 comprises a dosing pipeline 1, an outer fixing ring 2, a center axis 1 3, a center axis 2 4, a fixing frame 5, a drug inlet port 6 and mixing blades;

[0037] The dosing pipe 1 is provided with a water inlet end 101 on one side and a water outlet end 102 on the other side, and a first mixing section 103 and a second mixing section 104 are provided inside the dosing pipe 1, and the first mixing section 103 is connected to the second mixing section 104;

[0038] The first mixing section 103 is connected to the water inlet 101, and the second mixing section 104 is connected to the water outlet 102;

[0039] The two outer fixing rings 2 are fixedly mounted on the water inlet end 101 and the water outlet end 102, and a plurality of support rods 202 are arranged on the outer fixing ring 2, and a rotating seat 201 is fixedly connected to the plurality of support rods 202, and the rotating seat 201 is arranged at the center point of the outer fixing ring 2;

[0040] A plurality of water holes 203 are formed between the plurality of support rods 202, and the plurality of water holes 203 are evenly arranged on the outer fixing ring 2;

[0041] The mixing blades include a left-handed blade 301 and a right-handed blade 401;

[0042] The central shaft 1 3 is rotatably installed in the first mixing section 103, and the central shaft 2 4 is rotatably installed in the second mixing section 104;

[0043] The left-handed blades 301 are evenly arranged on the outer surface of the central axis 1 3 , and the right-handed blades 401 are evenly arranged on the outer surface of the central axis 2 4 .

[0044] There are two fixing frames 5 installed in the first mixing section 103 and the second mixing section 104 ; a connecting seat 501 is installed on the fixing frame 5 , and a turbulent net 502 is detachably installed on the fixing frame 5 .

[0045] One end of the central axis 1 3 is rotatably connected to the rotating seat 201 , and the other end is rotatably connected to the connecting seat 501 ; one end of the central axis 2 4 is rotatably connected to the connecting seat 501 , and the other end is rotatably connected to the rotating seat 201 .

[0046] The lengths of the left-handed blade 301 and the right-handed blade 401 are equal. The pitches of the left-handed blade 301 and the right-handed blade 401 are equal. The drug inlet nozzle 6 is installed on the upper surface of the drug adding pipeline 1; a conical drug inlet hole 601 is arranged in the drug inlet nozzle 6, and the drug inlet hole 601 is connected to the first mixing section 103.

[0047] The sewage dosing pretreatment system first selects a suitable conveying method, and then adds PAC and PAM through the first pipeline mixer 18 or the second pipeline mixer 19, so that the reagent and sewage are mixed more evenly, which is convenient for subsequent sedimentation in the clarification tank.

[0048] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A sewage dosing pretreatment system, comprising a sewage collection tank, characterized in that: The outlet of the sewage collection tank is connected to two parallel first dosing pipelines and a second dosing pipeline, the first dosing pipeline is provided with a first delivery pump and a first pipeline mixer, the second dosing pipeline is provided with a second delivery pump and a second pipeline mixer, the first dosing pipeline is provided with a first upstream control valve located upstream of the first delivery pump, and a first downstream control valve located downstream of the first pipeline mixer; the second dosing pipeline is provided with a second upstream control valve located upstream of the second delivery pump, and a second downstream control valve located downstream of the second pipeline mixer; the downstream sections of the first dosing pipeline and the second dosing pipeline are converged and connected to the main delivery pipeline, a series branch is provided between the outlet of the first delivery pump and the inlet of the second delivery pump or between the inlet of the first delivery pump and the outlet of the second delivery pump, and a branch control valve is provided on the series branch; the first pipeline mixer comprises a dosing pipeline, an outer fixing ring, a central axis one, a central axis two, a fixing frame, a drug inlet pipe port and a mixing blade; The dosing pipe is provided with a water inlet end on one side and a water outlet end on the other side, and a first mixing section and a second mixing section are provided inside the dosing pipe, wherein the first mixing section is connected to the second mixing section; The first mixing section is connected to the water inlet, and the second mixing section is connected to the water outlet; The two outer fixing rings are fixedly mounted on the water inlet end and the water outlet end, a plurality of support rods are arranged on the outer fixing ring, a rotating seat is fixedly connected to the plurality of support rods, and the rotating seat is arranged at the center point of the outer fixing ring; A plurality of water holes are formed between the plurality of support rods, and the plurality of water holes are evenly arranged on the outer fixing ring; The mixing blades include left-handed blades and right-handed blades; The central shaft 1 is rotatably mounted in the first mixing section, and the central shaft 2 is rotatably mounted in the second mixing section; The left-handed blades are evenly arranged on the outer surface of the central axis one, and the right-handed blades are evenly arranged on the outer surface of the central axis two; there are two fixing frames, which are installed in the first mixing section and the second mixing section; a connecting seat is installed on the fixing frame, and a turbulent net is detachably installed on the fixing frame; one end of the central axis one is rotatably connected to the rotating seat, and the other end is rotatably connected to the connecting seat; one end of the central axis two is rotatably connected to the connecting seat, and the other end is rotatably connected to the rotating seat.

2. A sewage dosing pretreatment system as claimed in claim 1, characterized in that: The number of the first pipeline mixers is two, the number of the second pipeline mixers is two, the two first pipeline mixers are connected to the PAC addition system and the PAM addition system respectively, and the two second pipeline mixers are connected to the PAC addition system and the PAM addition system respectively.

3. A sewage dosing pretreatment system as claimed in claim 2, characterized in that: The lengths of the left-handed blade and the right-handed blade are equal.

4. A sewage dosing pretreatment system as claimed in claim 3, characterized in that: The pitches of the left-handed blade and the right-handed blade are equal.

5. A sewage dosing pretreatment system as claimed in claim 4, characterized in that: The drug inlet pipe opening is installed on the upper surface of the drug adding pipeline; a conical drug inlet hole is arranged in the drug inlet pipe opening, and the drug inlet hole is connected to the first mixing section.

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