Auxiliary backwashing device of multi-media filter

Abstract

The utility model discloses an auxiliary backwashing device of a multi-medium filter, which comprises a multi-medium filter tank, a backwashing delivery pipe, a valve group, a raw water supply device, a compressed air source and a backwashing discharge pipeline, a plurality of layers of filter medium fillers are arranged in the multi-medium filter tank, the multi-medium filter tank forms a filter channel from bottom to top, and the filter channel is communicated with the valve group. A first connecting port is formed in the lower end of the multi-medium filtering tank, and a second connecting port is formed in the upper end; the backwashing conveying pipe is vertically arranged in the multi-medium filtering tank, branch pipes which obliquely extend downwards are arranged on the side wall of the backwashing conveying pipe at intervals in the axial direction, the branch pipes are communicated with the backwashing conveying pipe, spraying holes are formed in the branch pipes, the tail ends of the branch pipes extend into the filtering medium filler, and the spraying holes are communicated with the filtering medium filler. And the lower end of the backwashing conveying pipe is communicated with the first connecting port. According to the utility model, the backwashing efficiency and effect can be improved, and the defect of insufficient backwashing power only depending on a water pump is overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of multi-medium filter auxiliary backwashing device, belong to the pharmaceutical pure water production technical field. BACKGROUND

[0002] At present, pharmaceutical industry develops rapidly, to ensure product quality, the state has formulated strict norms and requirements to perfect the design and use of relevant products, especially in the production of purified water. In order to meet the requirements of Chinese Pharmacopoeia and GMP regulations on purified water, each process in the production of medicine has higher requirements on water quality, especially in the pretreatment part, the filter tank needs to be backwashed after being used for a period of time.

[0003] After searching the prior art, it is found that the Chinese patent with publication number CN217367289U discloses a pharmaceutical water workshop activated carbon filter backwashing structure. The patent enhances the effectiveness of backwashing, prolongs the maintenance period of the filter, and improves the service life of the equipment. However, as the capacity of purified water machine increases (for example, 10T and above specifications), the volume and filler amount of the multi-medium filter also increase significantly. In this case, the effect of backwashing solely relying on the power of the raw water pump is limited. For example, in a 10T purified water machine, the weight of the filler of the multi-medium filter can reach 4000KG, and it is difficult to achieve the desired effect of backwashing solely relying on the water flow of the water pump, resulting in low backwashing efficiency and inability to meet the growing production demand. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a multi-medium filter auxiliary backwashing device that can improve the efficiency and effect of backwashing and overcome the insufficient backwashing power of the water pump.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a multi-medium filter auxiliary backwashing device, comprising:

[0006] A multi-medium filter tank is provided with a plurality of layers of filter medium filler inside, the multi-medium filter tank constitutes a filtration channel from bottom to top, the lower end of the multi-medium filter tank is provided with a first connecting port, and the upper end is provided with a second connecting port;

[0007] A backwashing conveying pipe is vertically arranged in the multi-medium filter tank, the side wall of the backwashing conveying pipe is provided with inclined downward extending branch pipes at intervals along the axial direction, the branch pipes are in communication with the backwashing conveying pipe, the branch pipes are provided with injection holes, the branch pipes extend into the filter medium filler at the end, and the lower end of the backwashing conveying pipe is in communication with the first connecting port, and the upper end is in communication with the second connecting port;

[0008] a valve group, the valve group comprising a first valve and a second valve, the first valve being provided with a first valve inlet and a first valve outlet, the first valve outlet being in communication with a first connecting port of the multi-medium filter tank, the second valve being provided with a second valve inlet and a second valve outlet, the second valve inlet being in communication with a second connecting port of the multi-medium filter tank;

[0009] a raw water supply device, an outlet of the raw water supply device being in communication with the first valve inlet;

[0010] a compressed gas source, an outlet of the compressed gas source being in communication with the first connecting port through a gas source pipeline;

[0011] a backwashing discharge pipeline, the backwashing discharge pipeline being in communication with the second valve outlet;

[0012] wherein the backwashing water of the raw water supply device enters the backwashing delivery pipeline of the multi-medium filter tank through the first valve and the first connecting port, and the compressed gas of the compressed gas source enters the backwashing delivery pipeline together with the backwashing water through the first connecting port, and the compressed gas and the backwashing water are discharged from the second connecting port at the upper end of the multi-medium filter tank through the second valve and the backwashing discharge pipeline.

[0013] Further, a plurality of branch pipelines are circumferentially arranged on the backwashing delivery pipeline.

[0014] Further, the valve group further comprises a third valve and a fourth valve, the third valve being provided with a third valve inlet and a third valve outlet, the fourth valve being provided with a fourth valve inlet and a fourth valve outlet, the third valve inlet being in communication with the outlet of the raw water supply device, the third valve outlet being in communication with the second connecting port, the fourth valve inlet being in communication with the first connecting port, and the fourth valve outlet being in communication with the backwashing discharge pipeline.

[0015] Further, a communication pipeline is arranged between the first connecting port and the backwashing discharge pipeline of the multi-medium filter tank, and a discharge control valve is arranged on the communication pipeline.

[0016] Further, the multi-layer filter medium fillings in the multi-medium filter tank are composed of filter materials with different particle sizes, and the filter materials are arranged in layers from top to bottom in order of particle size from small to large, forming a gradient filtration structure.

[0017] Further, a specific structure of a raw water supply device is provided, the raw water supply device comprising:

[0018] a raw water tank, the raw water tank being provided with a water inlet and a water outlet, the water inlet of the raw water tank being in communication with a water source;

[0019] A raw water pump is provided with a water pump water inlet and a water pump water outlet, the water pump water inlet is communicated with the raw water tank, and the water pump water outlet is communicated with the first valve inlet;

[0020] A pneumatic valve is arranged on the connecting pipeline between the raw water outlet of the raw water tank and the water inlet of the raw water pump, and the pneumatic valve is suitable for controlling the water outlet of the raw water tank.

[0021] Further, a manual ball valve, a check valve and a pneumatic ball valve are sequentially arranged on the connecting pipeline between the first connecting port of the lower end of the multi-medium filter tank and the compressed gas source in the gas flow direction.

[0022] Further, a pressure reducing valve and a pressure gauge are further arranged at the gas outlet of the compressed gas source.

[0023] The technical scheme has the following beneficial effects:

[0024] In the working process of the utility model, the backwashing water provided by the raw water supply device firstly enters the multi-medium filter tank through the first connecting port of the multi-medium filter tank from the first valve inlet of the first valve, and the compressed gas of the compressed gas source also enters the backwashing conveying pipe from the lower end of the backwashing conveying pipe through the first connecting port and the backwashing water, the gas-liquid mixed fluid passes through the downwardly inclined branch pipe of the backwashing conveying pipe and is sprayed downward from the spray hole arranged on the branch pipe, washes the pollutants trapped in the filter medium filler, and the backwashing of the gas-liquid mixed fluid improves the stripping and flushing effect on the pollutants in the filter medium.

[0025] In addition, after the backwashing is completed, the first valve can be closed and the discharge control valve can be opened, so that the residual sewage is discharged through the connecting pipeline; the pressure reducing valve, the pressure gauge, the manual ball valve, the check valve and the pneumatic ball valve arranged on the connecting pipeline between the multi-medium filter tank and the compressed gas source ensure the safe and stable supply of gas pressure and prevent the backflow of gas and backwashing water.

[0026] In summary, the multi-medium filter auxiliary backwashing device of the utility model realizes the gas-liquid combined flushing of the filter medium, improves the backwashing efficiency, reduces the backwashing time and water consumption, solves the problem of relatively poor effect in backwashing only using the water pump, reduces the maintenance cost, and has significant economic and environmental benefits. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structure schematic view of the multi-medium filter auxiliary backwashing device of the utility model;

[0028] Figure 2The utility model discloses a valve group's structure schematic drawing of the auxiliary backflushing device of multi -medium filter.

[0029] Figure 3 For Figure 1 The local amplification drawing of part A;

[0030] Figure 4 The structure schematic drawing of backflushing delivery pipe of the auxiliary backflushing device of multi -medium filter. DETAILED DESCRIPTION

[0031] In order to make the content of the utility model more easily be clearly understood, below according to specific embodiment and combining with the drawing, the utility model is further detailed.

[0032] As Figures 1-4 The utility model discloses an auxiliary backflushing device of multi -medium filter, including:

[0033] Multi -medium filter jar 1, be equipped with multilayer filter medium filling 11 in multi -medium filter jar 1, and multi -medium filter jar 1 constitutes the filtration channel from bottom to top, and the lower end of multi -medium filter jar 1 is equipped with first connecting port 12, and the upper end is equipped with second connecting port 13;

[0034] Backflushing delivery pipe 2, backflushing delivery pipe 2 is vertically arranged in multi -medium filter jar 1, and the lateral wall of backflushing delivery pipe 2 is spaced apart and is provided with the branch pipe 21 of inclined downward extension along the axial direction, and the branch pipe 21 is communicated with backflushing delivery pipe 2, and the branch pipe 21 is equipped with injection hole, and the branch pipe 21 end extends to filter medium filling 11, and the lower end of backflushing delivery pipe 2 is communicated with first connecting port 12, and the upper end is communicated with second connecting port 13;

[0035] Valve group, valve group includes first valve 31 and second valve 32, and first valve 31 is equipped with first valve inlet and first valve outlet, and first valve outlet is communicated with the first connecting port 12 of multi -medium filter jar 1, and second valve 32 is equipped with second valve inlet and second valve outlet, and second valve inlet is communicated with the second connecting port 13 of multi -medium filter jar 1;

[0036] Raw water supply device, and the water outlet of raw water supply device is communicated with first valve inlet;

[0037] Compressed gas source 4, and the gas outlet of compressed gas source 4 is communicated with first connecting port 12 through gas source pipeline;

[0038] Backflushing discharge pipeline 6, and backflushing discharge pipeline 6 is communicated with second valve outlet;

[0039] Wherein, the backwash water of the raw water supply device enters the backwash delivery pipe 2 of the multi-medium filter tank 1 through the first valve 31 and the first connecting port 12, and the compressed gas of the compressed gas source 4 enters the backwash delivery pipe 2 together with the backwash water through the first connecting port 12, and sprays downward through the spray hole of the branch pipe 21 to flush the filter medium filler 11, and part of the compressed gas and the backwash water enter the backwash discharge pipe 6 through the second valve 32 and the second connecting port 13 at the upper end of the multi-medium filter tank 1.

[0040] In the embodiment, as shown in Figures 1-2 and Figure 4 , the backwash water provided by the raw water supply device first enters the multi-medium filter tank 1 through the first valve inlet of the first valve 31 and the first connecting port 12 of the multi-medium filter tank 1, and the compressed gas of the compressed gas source 4 also enters the backwash delivery pipe 2 together with the backwash water through the first connecting port 12, and the backwash water and the compressed gas mixed fluid flow through the downwardly inclined branch pipe 21 of the backwash delivery pipe 2, and is sprayed downward from the spray hole arranged on the branch pipe 21 to flush the pollutants trapped in the filter medium filler 11, and the backwash of the backwash water and the compressed gas mixed fluid improves the stripping and flushing effect of the pollutants in the filter medium.

[0041] Specifically, as shown in Figures 1-2 , a communication pipeline is arranged between the first connecting port 12 of the multi-medium filter tank 1 and the backwash discharge pipe 6, and a discharge control valve 35 is arranged on the communication pipeline.

[0042] Specifically, as shown in Figures 1-2 , the valve group further includes a third valve 33 and a fourth valve 34, the third valve 33 is provided with a third valve inlet and a third valve outlet, the fourth valve 34 is provided with a fourth valve inlet and a fourth valve outlet, the third valve inlet is connected with the water outlet of the raw water supply device, the third valve outlet is connected with the second connecting port 13, the fourth valve inlet is connected with the first connecting port 12, and the fourth valve outlet is connected with the backwash discharge pipe 6.

[0043] In the embodiment, as shown in Figures 1-2 , when backwashing without the compressed gas source, the first valve 31, the second valve 32 and the gas outlet of the compressed gas source 4 are closed, and the third valve 33 and the fourth valve 34 are opened, at this time, the raw water enters the multi-medium filter tank 1 through the second connecting port 13 from the third valve 33, and then is flushed through the backwash delivery pipe 2, and the flushing liquid carrying the pollutants is discharged through the backwash discharge pipe 6 after the fourth valve 34 and the first connecting port 12 at the lower end of the backwash delivery pipe 2.

[0044] The first valve 31 and the second valve 32 are opened, and the third valve 33 and the fourth valve 34 are closed in the backwashing stage. During the process of co-washing with compressed gas, the second valve 32 for discharging can be temporarily closed or adjusted to a small size in time, so that a certain degree of closed system is formed in the backwashing conveying pipe 2, the pressure and flow rate of the gas-liquid mixed fluid in the system are increased, and a greater impact force is generated at the jet hole of the branch pipe 21, so that the difficult-to-wash pollutants accumulated in the filter medium filler 11 are treated.

[0045] In the normal filtering state, the lower end of the multi-medium filter tank 1 is provided with a filtering inlet which is not connected with the backwashing conveying pipe 2, and the upper end is provided with a filtering outlet which is not connected with the backwashing conveying pipe 2. The first valve 31 and the second valve 32 are opened, and the gas outlet of the compressed gas source 4, the third valve 33 and the fourth valve 34 are closed. At this time, the raw water is introduced into the multi-medium filter tank 1 from the filtering inlet at the lower end of the multi-medium filter tank 1, and is filtered layer by layer from bottom to top through the multi-layer filter medium filler 11. The water flows out from the upper layer, and then enters the filtering water tank in the next process through the second valve 32 from the filtering outlet, so that the normal filtering function of the multi-medium filter is realized.

[0046] Specifically, as shown in Figure 1 and Figure 4 , two branch pipes 21 are arranged on the backwashing conveying pipe 2 in a circumferential direction.

[0047] In the embodiment, as shown in Figure 1 and Figure 4 , the branch pipes 21 arranged on the backwashing conveying pipe 2 in a circumferential direction are not limited to two, and can be set according to specific needs.

[0048] Specifically, as shown in Figure 1 , the multi-layer filter medium filler 11 in the multi-medium filter tank 1 is composed of filter materials with different particle sizes, and the filter materials are arranged in layers from top to bottom in the order of particle size from small to large, forming a gradient filtering structure.

[0049] In the embodiment, as shown in Figure 1 , when the raw water enters the multi-medium filter tank 1 from the bottom, it first passes through the bottom layer of filter medium with large specific gravity. The particles of this layer of medium are large, and the pores are relatively large, which mainly intercept large-size impurity particles in water. Then, the water flow continues to flow upward under the action of pressure, and passes through the intermediate layer and the upper layer of filter medium with gradually decreasing specific gravity. The particle size and pore size of these media are also correspondingly reduced, which can intercept finer suspended solids, forming a filtering effect from coarse to fine.

[0050] Specifically, as shown in Figure 1 , the raw water supply device comprises:

[0051] Raw water tank 51, raw water tank 51 is equipped with water inlet and water outlet, raw water tank 51 water inlet and water source communication;

[0052] Raw water pump 52, raw water pump 52 is equipped with water pump water inlet and water pump water outlet, water pump water inlet and raw water tank 51 water outlet communication, water pump water outlet and first valve import communication;

[0053] Pneumatic valve 53, pneumatic valve 53 is arranged on the connecting pipeline between the water outlet of raw water tank 51 and the water inlet of raw water pump 52, and the pneumatic valve 53 is suitable for controlling the water outlet of raw water tank 51.

[0054] In the embodiment, as shown in Figures 1-2 , the external water source continuously supplements raw water into the raw water tank 51 through the water inlet of the raw water tank 51. When the filtering or backwashing operation is needed, the pneumatic valve 53 is opened, and the raw water flows into the water pump water inlet of the raw water pump 52 from the water outlet of the raw water tank 51. After the raw water pump 52 is started, the raw water is transported to the inlet of the first valve 31 through the water pump water outlet, and the raw water refers to the raw material water for pharmaceutical purified water.

[0055] Specifically, as shown in Figures 1-3 , the first connecting port 12 at the lower end of the multi-medium filter tank 1 and the connecting pipeline between the compressed gas source 4 are sequentially provided with a manual ball valve 63, a check valve 64 and a pneumatic ball valve 65 along the gas flow direction.

[0056] Specifically, as shown in Figure 1 , the outlet of the compressed gas source 4 is also provided with a pressure reducing valve 61 and a pressure gauge 62.

[0057] In the embodiment, as shown in Figure 1 and Figure 3 , the pressure reducing valve 61 is located at the front end of the pipeline, which is used to reduce the high pressure gas provided by the compressed gas source 4 to the working pressure required by the system. The gas source pressure provided by the compressed gas source 4 is mostly 6-8bar, and the pressure needs to be reduced to 3bar during use to avoid damage to the multi-medium filter tank 1 caused by excessive gas pressure. The pressure gauge 62 immediately behind it displays the gas pressure in the pipeline in real time, which allows the operator to monitor the gas pressure state and ensure that the pressure remains within the appropriate range during backwashing. The manual ball valve 63 serves as the main manual control element and can quickly cut off the gas source in case of system maintenance or emergency. When the gas circuit needs to be repaired or replaced, the gas source can be isolated by closing the manual ball valve 63 to ensure maintenance safety. The check valve 64 prevents backflow of gas or liquid in the pipeline, especially when the backwashing operation stops, to prevent water in the multi-medium filter tank 1 from flowing back into the gas circuit. The pneumatic ball valve 65 is opened during backwashing and closed when backwashing is completed to cut off the gas supply.

[0058] The above-described specific embodiments further specifically describe the technical problems, technical solutions and beneficial effects solved by the present application, and it should be understood that the above-described specific embodiments are merely specific embodiments of the present application and are not used to limit the present application, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-media filter assisted backwash apparatus, characterized by, The utility model relates to a kind of multi-medium filter auxiliary backwashing devices, including: Multi-medium filter tank (1), the multi-medium filter tank (1) is equipped with multiple layers of filter medium filling (11) inside, the multi-medium filter tank (1) constitutes from bottom to top filter channel, the first connecting port (12) is equipped at the lower end of the multi-medium filter tank (1), and the second connecting port (13) is equipped at the upper end; Backwashing delivery pipe (2), the backwashing delivery pipe (2) is vertically arranged in the multi-medium filter tank (1), the side wall of the backwashing delivery pipe (2) is spaced apart along the axial direction and is equipped with branch pipe (21) extending downwardly, the branch pipe (21) is communicated with the backwashing delivery pipe (2), the branch pipe (21) is equipped with injection hole, the branch pipe (21) end extends into the filter medium filling (11), the lower end of the backwashing delivery pipe (2) is communicated with the first connecting port (12), and the upper end is communicated with the second connecting port (13); Valve group, the valve group includes first valve (31) and second valve (32), the first valve (31) is equipped with first valve inlet and first valve outlet, the first valve outlet is communicated with the first connecting port (12) of the multi-medium filter tank (1), the second valve (32) is equipped with second valve inlet and second valve outlet, the second valve inlet is communicated with the second connecting port (13) of the multi-medium filter tank (1); Raw water supply device, the water outlet of the raw water supply device is communicated with the first valve inlet; Compressed gas source (4), the gas outlet of the compressed gas source (4) is communicated with the first connecting port (12) by gas source pipeline; Backwashing discharge pipeline (6), the backwashing discharge pipeline (6) is communicated with the second valve outlet; Wherein, the backwashing water of the raw water supply device enters the backwashing delivery pipe (2) in the multi-medium filter tank (1) through the first valve (31) by the first connecting port (12), and the compressed gas of the compressed gas source (4) enters the backwashing delivery pipe (2) by the first connecting port (12) and backwashing water together, and part of compressed gas and backwashing water are discharged from the second connecting port (13) of the upper end of the multi-medium filter tank (1) through the second valve (32) by the backwashing discharge pipeline (6).

2. The multi-medium filter auxiliary backwashing device according to claim 1, wherein a communication pipeline is arranged between the first connecting port (12) of the multi-medium filter tank (1) and the backwashing discharge pipeline (6), and a discharge control valve (35) is arranged on the communication pipeline.

3. The multi-medium filter auxiliary backwashing device according to claim 1, wherein a plurality of branch pipes (21) are circumferentially arranged on the backwashing delivery pipe (2).

4. The multi-medium filter auxiliary backwashing device according to claim 1, wherein ​ ​ The valve group further comprises a third valve (33) and a fourth valve (34), the third valve (33) is provided with a third valve inlet and a third valve outlet, the fourth valve (34) is provided with a fourth valve inlet and a fourth valve outlet, the third valve inlet is communicated with the water outlet of the raw water supply device, the third valve outlet is communicated with the second connecting port (13), the fourth valve inlet is communicated with the first connecting port (12), and the fourth valve outlet is communicated with the backwashing discharge pipeline (6).

5. The multi-medium filter auxiliary backwashing device according to claim 1, wherein the multi-layer filter medium filler (11) in the multi-medium filter tank (1) is composed of filter materials with different particle sizes, and the filter materials are arranged in layers from top to bottom in order of particle size from small to large, forming a gradient filtration structure.

6. The multi-medium filter auxiliary backwashing device according to claim 1, wherein the raw water supply device comprises: a raw water tank (51) provided with a water inlet and a water outlet, the water inlet of the raw water tank (51) being communicated with a water source; a raw water pump (52) provided with a water pump water inlet and a water pump water outlet, the water pump water inlet being communicated with the raw water tank (51), and the water pump water outlet being communicated with the first valve inlet; and an air-operated valve (53) arranged on a connecting pipeline between the water outlet of the raw water tank (51) and the water inlet of the raw water pump (52), the air-operated valve (53) being adapted to control the water outlet of the raw water tank (51).

7. The multi-medium filter auxiliary backwashing device according to claim 1, wherein a manual ball valve (63), a check valve (64) and an air-operated ball valve (65) are arranged in sequence along the gas flow direction on a connecting pipeline between the first connecting port (12) of the lower end of the multi-medium filter tank (1) and the compressed gas source (4).

8. The multi-medium filter auxiliary backwashing device according to claim 1, wherein a pressure reducing valve (61) and a pressure gauge (62) are further arranged at the gas outlet of the compressed gas source (4). ​ ​ ​ ​

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