A gradient water washing device for filter press

Abstract

The utility model relates to water washing equipment field discloses a gradient water washing device of filter press, including filter press a, filter press b and filter press c, the injection port of filter press a, filter press b and filter press c all are fixedly connected with connecting assembly, connecting assembly passes through conveying assembly and is connected with water storage jar a, water storage jar b and sewage pool respectively, connecting assembly includes the four -way joint of fixed connection in the injection port of filter press, in the utility model, through gradient water washing circulation design, the washing process of filter press is divided into three stages and realizes water washing cascade reuse: the water washing of preceding filter press hour 2 is as the washing water of next filter press hour 1, the water washing of hour 3 is as the washing water of next filter press hour 2, only fresh water is used in hour 3, this kind of circulation mode can reduce fresh water consumption by more than 60%, significantly reduces water resource purchase cost, solves the problem of big water consumption of traditional one -station type washing.

Description

Technical Field

[0001] This utility model relates to the field of washing equipment, and in particular to a gradient washing device for a filter press. Background Technology

[0002] In the dye synthesis production process, after the reaction is completed and the crystallization is achieved through heat preservation, the reaction solution needs to enter a filter press for solid-liquid separation to obtain a wet filter cake of dye. Because the reaction solution contains a large amount of waste acid, the separated wet filter cake is highly acidic (pH value is usually below 2). It must be thoroughly washed until it is neutral (pH value 6-7) before being discharged. Otherwise, the residual acidic substances will cause the product quality to be unqualified and may even corrode subsequent processing equipment.

[0003] Traditional processes employ a one-stop washing method, using fresh raw water to wash the filter cake for up to 3 hours. This process has significant drawbacks. Each batch of filter cake requires a large amount of fresh raw water, leading to high water costs, especially in water-scarce areas where insufficient water supply can disrupt production continuity. During washing, the fresh raw water mixes thoroughly with the waste acid in the filter cake, generating large amounts of highly concentrated acidic wastewater, with an acidity typically close to that of the reaction solution. This wastewater requires multiple treatment processes, including neutralization and sedimentation, before it can meet discharge standards. This not only increases the operational load on wastewater treatment facilities but also significantly raises wastewater treatment costs, failing to meet current requirements for green production and energy conservation and emission reduction. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a gradient washing device for a filter press, which aims to improve the problem in the prior art that "the traditional one-stop washing method uses fresh raw water throughout the process, resulting in high water consumption, high production water costs, and the generation of a large amount of high-concentration acidic wastewater, which increases the load and cost of sewage treatment facilities".

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a gradient washing device for a filter press, comprising a filter press a, a filter press b, and a filter press c. Each of the filter presses a, b, and c has a fixedly connected connecting assembly at its injection port. The connecting assembly is connected to a water storage tank a, a water storage tank b, and a wastewater tank via a conveying assembly. The connecting assembly includes a four-way connector fixedly connected to the injection port of the filter press. A raw water pipe for receiving raw water is fixedly connected to the rear side of the four-way connector. A wastewater injection pipe is fixedly connected to the left side of the four-way connector. A fixed pipe is fixedly connected to the front side of the four-way connector. One-way valves are installed on the inner walls of the raw water pipe, the injection pipe, and the fixed pipe. A water distribution controller is fixedly connected to the outlet port of the filter press a.

[0006] As a further description of the above technical solution: The conveying assembly includes drain pipes a, b, and c, which are fixedly connected to the lower output end of the water distribution controller. The end of drain pipe a away from the water distribution controller is fixedly connected to the inner wall of the sewage tank. The end of drain pipe b away from the water distribution controller is fixedly connected to the inner wall of the water storage tank a. The end of drain pipe c away from the water distribution controller is fixedly connected to the inner wall of the water storage tank b. A connecting pipe a is fixedly connected to the right side of the water storage tank a, and a connecting pipe b is fixedly connected to the right side of the water storage tank b. There are two sets of connecting pipes a and b. The side of connecting pipes a and b away from the water storage tanks a and b is fixedly connected to the outside of the connecting assembly on the filter press b.

[0007] As a further description of the above technical solution: Multiple sets of water storage tanks a and b are provided. The conveying assembly also includes return pipe a and return pipe b. Return pipe a and return pipe b are respectively fixedly connected to the outside of the rightmost set of water storage tanks a and b. The end of return pipe a and return pipe b away from water storage tanks a and b is fixedly connected to the outside of a fixed pipe fixed on filter press a.

[0008] As a further description of the above technical solution: The output ends of all the aforementioned one-way valves face the four-way connector.

[0009] As a further description of the above technical solution: Metering pumps are installed on the inner walls of both connecting pipe a and connecting pipe b.

[0010] As a further description of the above technical solution: The wastewater tank is provided in multiple sets, which are used to receive wastewater generated by the washing of filter press a, filter press b and filter press c respectively.

[0011] As a further description of the above technical solution: The pipes in the conveying assembly are all made of acid and alkali resistant materials.

[0012] This utility model has the following beneficial effects: 1. In this utility model, the washing process of the filter press is divided into three stages by a gradient washing water circulation design, and the washing water is reused in stages: the washing water of the second hour of the previous filter press is used as the washing water of the first hour of the next filter press, and the washing water of the third hour is used as the washing water of the second hour of the next filter press. Fresh raw water is used only in the third hour. This circulation mode can reduce the consumption of fresh raw water by more than 60%, significantly reduce the cost of water resource procurement, and solve the problem of high water consumption in traditional one-stop washing.

[0013] 2. In this invention, only the wash water from the first hour, which has the highest waste acid content, is directly discharged into the sewage tank through gradient washing. The wash water from the second and third hours is collected in a storage tank and reused, reducing sewage discharge by approximately 60%. This not only reduces the operating load of sewage treatment facilities but also lowers the consumption of chemicals and energy costs for wastewater treatment, meeting the requirements of green and environmentally friendly production. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model; Figure 2 This is a three-dimensional structural diagram of the connecting component in this utility model; Figure 3 This is a left-side three-dimensional structural diagram of the overall device in this utility model.

[0015] Legend: 1. Filter press a; 2. Filter press b; 3. Filter press c; 4. Connecting assembly; 41. Four-way connector; 42. Raw water pipe; 43. Water injection pipe; 44. Fixed pipe; 45. One-way valve; 46. Water distribution controller; 5. Conveying assembly; 51. Return pipe a; 52. Return pipe b; 53. Drain pipe a; 54. Drain pipe b; 55. Drain pipe c; 56. Connecting pipe a; 57. Connecting pipe b; 6. Water storage tank a; 7. Water storage tank b; 8. Metering pump; 9. Wastewater tank. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figures 1-3This utility model provides an embodiment of a gradient washing device for a filter press, comprising filter press a1, filter press b2, and filter press c3. The filter presses are plate and frame filter presses, serving as the core equipment for solid-liquid separation and filter cake washing. They respectively undertake the washing process of the dye wet filter cake. Through connecting component 4, they receive wash water from different stages, including recycled water or fresh raw water, to perform gradient washing of the strongly acidic filter cake until it becomes neutral. Finally, the wash water from different stages is conveyed to conveying component 5 through the outlet port, achieving graded treatment and recycling of the wash water. The injection ports of filter press a1, filter press b2, and filter press c3 are all fixedly connected to connecting component 4. Connecting component 4 is connected to water storage tank a1 through conveying component 5. 6. Water storage tank b7 and sewage tank 9, the connecting assembly 4 includes a four-way connector 41 fixedly connected to the injection port of the filter press, fixed to the injection port of each filter press, as the core hub for the access of wash water, and respectively connected to the raw water pipe 42, water injection pipe 43, fixed pipe 44 and filter press inlet, which can simultaneously access fresh raw water, recycled wash water or circulating water. The raw water pipe 42 for accessing raw water is fixedly connected to the rear side of the four-way connector 41, connecting the external fresh water source to the four-way connector 41, and is used to deliver fresh raw water during the third stage washing of each filter press, ensuring that the filter cake is finally washed to neutral. The one-way valve 45 on its inner wall ensures that the water flow only in the direction of the four-way connector 41, avoiding backflow of wash water to contaminate the water source.

[0018] Furthermore, a wastewater inlet pipe 43 is fixedly connected to the left side of the four-way connector 41, connecting to an external recycled wash water pipe, such as the second and third stage wash water from the preceding filter press. This provides recycled water for the first and second stage washing of the current filter press. A one-way valve 45 prevents the high-acid wash water in the current filter press from flowing back into the recycled pipe, avoiding cross-contamination. A fixed pipe 44 is fixedly connected to the front of the four-way connector 41, serving as an access channel for circulating wash water. This introduces the recycled wash water from the previous filter press into the current filter press's washing process, enabling wash water circulation across multiple devices. The one-way valve 45 ensures that the circulating water only flows towards the four-way connector 41, maintaining circulation. To ensure system stability, one-way valves 45 are installed on the inner walls of the raw water pipe 42, water injection pipe 43, and fixed pipe 44. The output ends of multiple sets of one-way valves 45 face the four-way connector 41, which can effectively prevent the backflow of washing water, avoid mixing of washing water of different stages and different properties, and ensure the orderliness of gradient washing. The outlet port of filter press a1 is fixedly connected to a water distribution controller 46, which is equipped with multiple valves for opening and closing the drain pipe. These are general standard parts or components known to those skilled in the art. The washing wastewater of different stages is introduced into the drain pipe a53, drain pipe b54, and drain pipe c55 respectively, realizing the precise separation of sewage discharge and washing water recycling.

[0019] Reference Figure 2 and Figure 3The conveying assembly 5 includes drain pipes a53, b54, and c55 fixedly connected to the lower output end of the water distribution controller 46. The end of drain pipe a53 furthest from the water distribution controller 46 is fixedly connected to the inner wall of the wastewater tank 9. Drain pipe a53 connects the water distribution controller 46 to the wastewater tank 9, allowing the highest acid content wash water from the first stage of the filter press to be directly discharged into the wastewater tank 9, preventing high-concentration wastewater from entering the recycling system. The end of drain pipe b54 furthest from the water distribution controller 46 is fixedly connected to the inner wall of the water storage tank a6. Drain pipes b54 and c55 connect the water distribution controller 46 to water storage tanks a6 and b7 respectively, collecting the lower acid content wash water from the second and third stages of the filter press and transporting it to the corresponding water storage tanks for storage, as washing water for subsequent filter press cycles. The water source and drain pipe C55 are fixedly connected to the inner wall of the water storage tank B7 at one end away from the water distribution controller 46. A connecting pipe A56 is fixedly connected to the right side of the water storage tank A6, and a connecting pipe B57 is fixedly connected to the right side of the water storage tank B7. Both connecting pipes A56 and B57 are provided in two sets for connecting filter press A1->filter press B2->filter press C3. The side of connecting pipes A56 and B57 away from the water storage tanks A6 and B7 is fixedly connected to the outside of the connecting component 4 on the filter press B2. Connecting pipes A56 and B57 are respectively connected to the connecting component 4 of the water storage tanks A6 and B7 and the filter press B2. The other set is connected to the filter press C3, which transports the recycled wash water stored in the water storage tank to the next filter press as the washing water for its first and second stages.

[0020] Reference Figure 1 and Figure 3 Multiple sets of water storage tanks a6 and b7 are provided. The conveying assembly 5 also includes return pipes a51 and b52. Return pipes a51 and b52 are fixedly connected to the outside of the rightmost set of water storage tanks a6 and b7 respectively. The end of return pipes a51 and b52 away from water storage tanks a6 and b7 is fixedly connected to the outside of the fixed pipe 44 fixed on the filter press a1. The unused recycled wash water in the end water storage tank is returned to the initial filter press to form a closed loop circulation system and maximize the utilization rate of wash water. Metering pumps 8 are installed on the inner walls of both connecting pipes a56 and b57. They are controlled by external equipment to precisely control the amount of recycled wash water, ensuring that the amount of wash water for each filter press meets the process requirements and avoiding waste caused by insufficient water affecting the washing effect or excessive water. This technology is existing technology, so it will not be described in detail. There are multiple sets of wastewater tanks 9, which are used to receive the wastewater generated by the washing of filter presses a1, b2 and c3 respectively. The pipes in the conveying assembly 5 are all made of acid and alkali resistant materials.

[0021] Working principle: During use, the filter press a1 washes the dye wet filter cake in three stages: the high acid wastewater generated during the first hour of washing is directly discharged into the sewage tank 9 through the drain pipe a53 via the water distribution controller 46; the washing water during the second hour is collected into the water storage tank a6 via the drain pipe b54; and fresh raw water is introduced into the third hour of washing via the raw water pipe 42, and the low acid water generated is collected into the water storage tank b7 via the drain pipe c55.

[0022] The washing water for filter press b2 comes from the recycled water of filter press a1: the second hour's washing water from filter press a1 in water storage tank a6 is sent to filter press b2 through connecting pipe a56 as its first hour's washing water, and the resulting wastewater is directly discharged into sewage tank 9; then the third hour's washing water from filter press a1 in water storage tank b7 is sent to filter press b2 through connecting pipe b57 as its second hour's washing water, and the resulting washing water is collected back into water storage tank a6; finally, fresh raw water is used to complete the third hour's washing, and the resulting washing water is collected into water storage tank b7.

[0023] The washing process of filter press C3 is the same as that of filter press B2, reusing the recycled water from the preceding filter press: In the first hour, recycled water from storage tank A6 is used, and the wastewater is discharged into sewage tank 9; in the second hour, recycled water from storage tank B7 is used, and the wash water is returned to storage tank A6; in the third hour, fresh raw water is used, and the wash water is returned to storage tank B7. Unused wash water in the rightmost storage tank flows back to the fixed pipe 44 of filter press A1 through return pipes A51 and B52, forming a closed-loop cycle. This reduces the operating load of the wastewater treatment facility and lowers the consumption of chemicals and energy costs for wastewater treatment, meeting the requirements of green and environmentally friendly production.

[0024] The four-way connector 41 enables precise access to multiple washing channels, while the one-way valve 45 prevents backflow contamination. The metering pump 8 precisely controls the amount of recycled water delivered to ensure washing effectiveness. Acid and alkali resistant pipes prevent corrosion and leakage, and multiple wastewater pools 9 enable classified collection of wastewater.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gradient washing device for a filter press, comprising filter press a (1), filter press b (2) and filter press c (3), characterized in that: The injection ports of filter press a (1), filter press b (2) and filter press c (3) are all fixedly connected to a connecting component (4). The connecting component (4) is connected to water storage tank a (6), water storage tank b (7) and sewage tank (9) respectively through a conveying component (5). The connecting component (4) includes a four-way connector (41) fixedly connected to the injection port of the filter press. A raw water pipe (42) for receiving raw water is fixedly connected to the rear side of the four-way connector (41). A water injection pipe (43) for receiving sewage is fixedly connected to the left side of the four-way connector (41). A fixed pipe (44) is fixedly connected to the front side of the four-way connector (41). A one-way valve (45) is provided on the inner wall of the raw water pipe (42), the water injection pipe (43) and the fixed pipe (44). A water distribution controller (46) is fixedly connected to the outlet port of filter press a (1).

2. A gradient water washing device for filter press according to claim 1, characterized in that: The conveying assembly (5) includes drain pipe a (53), drain pipe b (54), and drain pipe c (55) fixedly connected to the lower output end of the water distribution controller (46). The end of drain pipe a (53) away from the water distribution controller (46) is fixedly connected to the inner wall of the sewage tank (9). The end of drain pipe b (54) away from the water distribution controller (46) is fixedly connected to the inner wall of the water storage tank a (6). The drain pipe c (55) is away from the water distribution controller (46). One end is fixedly connected to the inner wall of the water storage tank b (7). The right side of the water storage tank a (6) is fixedly connected to the connecting pipe a (56), and the right side of the water storage tank b (7) is fixedly connected to the connecting pipe b (57). The connecting pipe a (56) and the connecting pipe b (57) are each provided in two sets. The side of the connecting pipe a (56) and the connecting pipe b (57) away from the water storage tank a (6) and the water storage tank b (7) is fixedly connected to the outside of the connecting assembly (4) on the filter press b (2).

3. A gradient water washing device for filter press according to claim 1, characterized in that: The water storage tanks a (6) and b (7) are provided in multiple sets. The conveying assembly (5) also includes a return pipe a (51) and a return pipe b (52). The return pipes a (51) and b (52) are respectively fixedly connected to the outside of the rightmost set of water storage tanks a (6) and b (7). The end of the return pipes a (51) and b (52) away from the water storage tanks a (6) and b (7) is fixedly connected to the outside of the fixed pipe (44) fixed on the filter press a (1).

4. The gradient washing device for a filter press according to claim 1, characterized in that: The output ends of all the multiple check valves (45) face the four-way connector (41).

5. A gradient washing device for a filter press according to claim 2, characterized in that: Metering pumps (8) are installed on the inner walls of both connecting pipe a (56) and connecting pipe b (57).

6. The gradient washing device for a filter press according to claim 1, characterized in that: The sewage tank (9) is provided in multiple sets, and the multiple sets of sewage tanks (9) are respectively used to receive the wastewater generated by the washing of filter press a (1), filter press b (2) and filter press c (3).

7. A gradient washing device for a filter press according to claim 1, characterized in that: The pipes in the conveying assembly (5) are all made of acid and alkali resistant materials.

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