Automatic filtering and washing device

Abstract

The utility model discloses an automatic filtering and washing device which comprises a slurry tank, the slurry tank is respectively communicated with a washing water tank and a filter press through pipelines, a discharge port of the filter press respectively forms a loop with the slurry tank and the washing water tank through pipelines, and the filter press is further provided with a hot water feed pipe. A slurry feeding stop valve is arranged on a pipeline through which the slurry tank is communicated with the filter pressing pump, a washing water feeding stop valve is arranged on a pipeline through which the washing water tank is communicated with the filter pressing pump, and a hot water feeding stop valve is arranged on a pipeline through which the hot water feeding pipe is communicated with the filter pressing pump. The utility model provides a full-automatic filtering and washing device with few process flows. The plate frame washing device is good in washing effect, washing water and hot water can completely cover all corners of the whole plate frame in the washing process, and the full washing process is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to an automatic filtering and washing device. Background Art

[0002] In the chemical production process, filtration equipment is a commonly used production process. How to filter and separate solid substances and recycle solids after sufficient washing while reducing the process flow and operation intensity is a problem that the industry needs to solve. Summary of the invention

[0003] The purpose of the utility model is to provide an automatic filtering and washing device in order to make up for the shortcomings of the prior art.

[0004] The technical solution of this utility model:

[0005] An automatic filtering and washing device comprises a slurry tank, wherein the slurry tank is connected with a washing water tank and a filter press through pipelines, a discharge port of the filter press forms a loop with the slurry tank and the washing water tank through pipelines, and the filter press is also provided with a hot water feed pipe.

[0006] Preferably, a slurry feed cut-off valve is provided on the pipeline connecting the slurry tank and the filter press pump, a washing water feed cut-off valve is provided on the pipeline connecting the washing water tank and the filter press pump, and a hot water feed cut-off valve is provided on the pipeline connecting the hot water feed pipe and the filter press pump.

[0007] Preferably, the slurry tank, washing water tank and hot water feed pipe are all connected to the filter press feed pipe through a filter press pump.

[0008] Preferably, the filter press is provided with four interfaces at the four corners respectively, the lower interface is the feed port, and the feed pipe connected to the feed port is provided with a lower left feed cut-off valve, and the interfaces at the other three corners are respectively connected pipes provided with a lower right feed cut-off valve, an upper left feed cut-off valve, and an upper right feed cut-off valve.

[0009] Further preferably, the pipes connected to the lower right feed cut-off valve, the upper left feed cut-off valve and the upper right feed cut-off valve are combined and respectively connected to the slurry tank, the washing water tank, the filtrate pipe and the washing water pipe, a filtrate reflux cut-off valve is provided on the connecting pipe between the slurry tank and the filter press, a washing water reflux cut-off valve is provided on the connecting pipe between the filter press and the washing water tank, a filtrate outlet cut-off valve is provided on the filtrate pipe, and a washing water outlet cut-off valve is provided on the washing water pipe.

[0010] Preferably, a pipeline sight glass is provided on the reflux connecting pipeline between the filter press and the slurry tank.

[0011] Preferably, a flow meter and a pressure gauge are provided on the pipeline connecting the filter press and the filter press pump.

[0012] Preferably, a washing tank level gauge is provided on the washing tank, and a filter cake discharge port is provided at the bottom of the filter press.

[0013] The utility model has the following beneficial effects:

[0014] 1. This device provides a fully automatic filtering and washing device with few process steps.

[0015] 2. This device has a good washing effect. The four cut-off valves, namely the lower left feed cut-off valve, the lower right feed cut-off valve, the upper left feed cut-off valve and the upper right feed cut-off valve in the inlet and outlet pipes of the filter press correspond to the four corners of the filter press. Washing water and hot water enter from the lower part of the filter press through the lower left feed cut-off valve and exit from the other three corners respectively. The washing water and hot water can fully cover every corner of the entire plate frame during the washing process, achieving a full washing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the four interface structures of the filter press;

[0018] In the figure: a slurry tank, b washing water tank, c filter press pump, d1 slurry feed cut-off valve, d2 washing water feed cut-off valve, d3 hot water feed cut-off valve, e lower left feed cut-off valve, f1 lower right feed cut-off valve, f2 upper left feed cut-off valve, f3 upper right feed cut-off valve, g1 filtrate reflux cut-off valve, g2 filtrate outlet cut-off valve, g3 washing water reflux cut-off valve, g4 washing water outlet cut-off valve, h filter press, i filter cake outlet, J1 feed flowmeter, P1 feed pressure, L1 washing water tank level gauge, T pipeline sight glass. DETAILED DESCRIPTION

[0019] The following will be combined with the specific embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example 1

[0021] An automatic filtering and washing device comprises a slurry tank a, wherein the slurry tank a is connected with a washing water tank b and a filter press h through pipelines, and a discharge port of the filter press h forms a loop with the slurry tank a and the washing water tank b through pipelines, and the filter press h is also provided with a hot water feed pipe.

[0022] Preferably, a slurry feed shut-off valve d1 is provided on the pipeline connecting the slurry tank a and the filter press pump c, a washing water feed shut-off valve d2 is provided on the pipeline connecting the washing water tank b and the filter press pump c, and a hot water feed shut-off valve d3 is provided on the pipeline connecting the hot water feed pipe and the filter press pump c.

[0023] Preferably, the slurry tank a, the washing water tank b and the hot water feed pipe are all connected to the feed pipe of the filter press h through the filter press pump c.

[0024] Preferably, the filter press h is respectively provided with four interfaces at the four corners, the lower interface is the feed port, and the feed pipe connected to the feed port is provided with a lower left feed cut-off valve e, and the interfaces at the other three corners are respectively connected with pipes provided with a lower right feed cut-off valve f1, an upper left feed cut-off valve f2, and an upper right feed cut-off valve f3.

[0025] Further preferably, the pipes connected by the lower right feed cut-off valve f1, the upper left feed cut-off valve f2 and the upper right feed cut-off valve f3 are combined and respectively connected to the slurry tank a, the washing water tank b, the filtrate pipe and the washing water pipe, the reflux connecting pipe between the slurry tank a and the filter press h is provided with a filtrate reflux cut-off valve g1, the reflux connecting pipe between the filter press h and the washing water tank b is provided with a washing water reflux cut-off valve g3, the filtrate pipe is provided with a filtrate outlet cut-off valve g2, and the washing water pipe is provided with a washing water outlet cut-off valve g4.

[0026] Preferably, a pipeline sight glass T is provided on the reflux connecting pipeline between the filter press h and the slurry tank a.

[0027] Preferably, a flow meter J1 and a pressure gauge P1 are provided on the pipeline connecting the filter press h and the filter press pump c.

[0028] Preferably, a washing tank level gauge L1 is provided on the washing tank b, and a filter cake discharge port i is provided at the bottom of the filter press h.

[0029] How to use:

[0030] Click to enter the start-up phase. At this time, (slurry feed cut-off valve, lower left feed cut-off valve, lower right feed cut-off valve, upper left feed cut-off valve, upper right feed cut-off valve, filtrate reflux cut-off valve) are opened, and other cut-off valves are closed;

[0031] After the automatic detection reaches the start-up conditions, the filter press pump starts to automatically increase the frequency to the specified value, and the slurry in the slurry tank is transported to the filter press through the filter press pump, and then refluxes through the lower right feed cut-off valve, the upper left feed cut-off valve, the upper right feed cut-off valve, and the filtrate reflux cut-off valve to the slurry tank;

[0032] After the pipeline sight glass detects that the reflux is clear, the filtrate cut-off valve is opened and the filtrate reflux cut-off valve is closed, and normal filtration production is carried out at this time;

[0033] When the feed flow meter is lower than the set value or the feed pressure is higher than the set value, the filter cake in the filter press is fully filled, and the filter press pump frequency is automatically reduced to 15% after a certain delay, the slurry feed cut-off valve is closed, the washing water reflux cut-off valve is opened, the filtrate cut-off valve is closed, the washing water feed cut-off valve is opened, and the filter press pump frequency is slowly increased to the specified value;

[0034] At this time, the washing water in the washing tank is transported to the filter press to wash the filter cake. During the washing period, the lower right feed cut-off valve, the upper left feed cut-off valve, and the upper right feed cut-off valve perform a two-close-one-open rotation process every 15 minutes;

[0035] After a certain period of washing, the washing water cut-off valve is opened, the washing water return cut-off valve is closed, and the washing water is transported to an external unit. When the washing water tank level gauge is lower than 20%, the filter press pump frequency is automatically reduced to 15%, the washing water return cut-off valve is opened), the washing water cut-off valve is closed, the washing water feed cut-off valve is closed, the hot water feed cut-off valve is opened, and then the filter press pump frequency is slowly increased to the specified value;

[0036] At this time, hot water is supplied to the filter press to wash the filter cake. During the washing process, the lower right feed cut-off valve, the upper left feed cut-off valve and the upper right feed cut-off valve perform a two-off-one-open process in rotation every 15 minutes. When the liquid level gauge in the washing water tank is higher than 90%, the filter press pump automatically stops and the hot water feed cut-off valve is closed.

[0037] At this time, the material in the slurry tank has been separated into solid and liquid, and the solids are stored in the filter press for washing. After the filter press is unloaded, production can be resumed.

[0038] The above are only relatively preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic filtering and washing device, comprising a slurry tank (a), characterized in that: The slurry tank (a) is connected to the washing water tank (b) and the filter press (h) through pipelines, and the outlet of the filter press (h) forms a loop with the slurry tank (a) and the washing water tank (b) through pipelines. The filter press (h) is also provided with a hot water feed pipe.

2. The automatic filtering and washing device according to claim 1, characterized in that: A slurry feed shut-off valve (d1) is provided on the pipeline connecting the slurry tank (a) and the filter press pump (c), a washing water feed shut-off valve (d2) is provided on the pipeline connecting the washing water tank (b) and the filter press pump (c), and a hot water feed shut-off valve (d3) is provided on the pipeline connecting the hot water feed pipe and the filter press pump (c).

3. The automatic filtering and washing device according to claim 1, characterized in that: The slurry tank (a), the washing water tank (b) and the hot water feed pipe are all connected to the feed pipe of the filter press (h) through the filter press pump (c).

4. The automatic filtering and washing device according to claim 1, characterized in that: The filter press (h) is provided with four interfaces at four corners, respectively. The lower interface is a feed port, and a feed pipe connected to the feed port is provided with a lower left feed cut-off valve (e). The interfaces at the other three corners are respectively connected to pipes provided with a lower right feed cut-off valve (f1), an upper left feed cut-off valve (f2), and an upper right feed cut-off valve (f3).

5. The automatic filtering and washing device according to claim 4, characterized in that: The pipelines connected to the lower right feed cut-off valve (f1), the upper left feed cut-off valve (f2), and the upper right feed cut-off valve (f3) are combined and respectively connected to the slurry tank (a), the washing water tank (b), the filtrate pipeline and the washing water pipeline. The filtrate reflux cut-off valve (g1) is provided on the reflux connecting pipeline between the slurry tank (a) and the filter press (h), the washing water reflux cut-off valve (g3) is provided on the reflux connecting pipeline between the filter press (h) and the washing water tank (b), the filtrate pipeline is provided with a filtrate outlet cut-off valve (g2), and the washing water pipeline is provided with a washing water outlet cut-off valve (g4).

6. The automatic filtering and washing device according to claim 1, characterized in that: A pipeline sight glass (T) is provided on the reflux connecting pipeline between the filter press (h) and the slurry tank (a).

7. The automatic filtering and washing device according to claim 1, characterized in that: A flow meter (J1) and a pressure gauge (P1) are provided on the pipeline connecting the filter press (h) and the filter press pump (c).

8. The automatic filtering and washing device according to claim 1, characterized in that: The washing water tank (b) is provided with a washing water tank level gauge (L1), and the bottom of the filter press (h) is provided with a filter cake discharge port (i).

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