Filter cloth flushing system of vacuum belt dehydrator

Abstract

The utility model relates to the technical field of vacuum belt dehydrators, in particular to a filter cloth flushing system of a vacuum belt dehydrator, which comprises a transmission wheel, filter cloth sleeved on the outer side of the transmission wheel, a spray head arranged below the transmission wheel and used for flushing the filter cloth, a storage tank arranged below the filter cloth and used for receiving flushing fluid, and a liquid conveying pipeline connected with the spray head. A filtering device is installed on the liquid conveying pipeline and comprises a shell, a first filtering cavity and a second filtering cavity which are communicated with each other are formed in the shell, a first columnar filter element and a second columnar filter element are arranged in the first filtering cavity and the second filtering cavity respectively, and filtering holes of the second filter element are smaller than those of the first filter element; the shell is also provided with an inlet and an outlet which are respectively communicated with the first filtering cavity and the second filtering cavity; according to the utility model, the filter device is arranged, so that filter cloth washing water can be filtered, and the condition that the spray head is blocked is avoided; and the shell is arranged in a manner of connecting the barrel and the blind flange, so that the filter element is convenient to disassemble and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum belt filter presses, in particular to a filter cloth flushing system for a vacuum belt filter press. Background Art

[0002] The vacuum belt filter press is an important device in the calcium method desulfurization dehydration system of thermal power plants. The limestone slurry reaches the purpose of dehydration through the vacuum suction of the vacuum belt filter press. Due to the fact that the water source of the filter cloth flushing water of the vacuum belt filter press contains more impurities and poor water quality, during the long-term operation of the vacuum belt filter press, the situation of blockage of the filter cloth flushing water nozzles often occurs. After the nozzles are blocked, the filter cloth cannot be flushed clean, seriously affecting the dehydration effect of the filter cloth. Content of the Utility Model

[0003] The main purpose of the utility model is to provide a filter cloth flushing system for a vacuum belt filter press, so as to solve the problem that the filter cloth flushing water nozzles of the vacuum belt filter press in the above-mentioned prior art are blocked, affecting the dehydration effect of the filter cloth.

[0004] To achieve the above purpose, the utility model provides a filter cloth flushing system for a vacuum belt filter press, which includes a driving wheel. A filter cloth is sleeved outside the driving wheel. A nozzle for flushing the filter cloth is arranged below the driving wheel. A storage tank for receiving the flushing liquid is arranged below the filter cloth. The nozzle is connected with an infusion pipeline, and a filtering device is installed on the infusion pipeline. The filtering device includes a housing. A first filtering chamber and a second filtering chamber which are communicated with each other are arranged inside the housing. A columnar first filter element and a second filter element are respectively arranged in the first filtering chamber and the second filtering chamber. The filtering holes of the second filter element are smaller than those of the first filter element. An inlet and an outlet which are respectively communicated with the first filtering chamber and the second filtering chamber are further arranged on the housing.

[0005] Further, the housing includes a hollow cylinder body and blind flange plates connected to the top and bottom of the cylinder body through connecting bolts.

[0006] Further, one end of the infusion pipeline far away from the nozzle is connected with a desulfurization process water tank, and the desulfurization process water tank is connected with the sewage discharge port of the power plant cooling tower through a pipeline. A process water pump is arranged on the infusion pipeline.

[0007] Further, the storage tank is connected with an absorption tower through a pipeline.

[0008] Further, an isolation pipe for isolating the filtering device is connected in parallel to the filtering device, and isolation valves are arranged on the isolation pipe and at a position on the infusion pipeline close to the filtering device.

[0009] The utility model can filter the filter cloth washing water through the arranged filtering device, avoiding the situation of nozzle blockage; the housing is arranged in a way of connecting a cylinder body and a blind flange, which is convenient for the disassembly and replacement of the filter element; by arranging an isolation pipe and an isolation valve, the filtering device can be isolated to realize online maintenance or replacement of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings forming a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments and descriptions thereof of the utility model are used to explain the utility model, and do not constitute an improper limitation of the utility model.

[0011] Figure 1 FIG. is a schematic structural diagram of a filter cloth washing system of a vacuum belt dewatering machine in an embodiment;

[0012] Figure 2 FIG. is a schematic structural diagram of a filtering device in an embodiment;

[0013] In the figure: 1, driving wheel; 2, filter cloth; 3, nozzle; 4, storage tank; 5, infusion pipeline; 6, filtering device; 601, housing; 601a, cylinder body; 601b, connecting bolt; 601c, blind flange; 602, first filtering chamber; 603, second filtering chamber; 604, first filter element; 605, second filter element; 606, inlet; 607, outlet; 7, power plant cooling tower; 8, process water pump; 9, absorption tower; 10, isolation pipe; 11, isolation valve; 12, desulfurization process water tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0015] As Figures 1 to 2 shown, according to an embodiment of the utility model, there is provided a filter cloth washing system of a vacuum belt dewatering machine, including a driving wheel 1, a filter cloth 2 is sleeved outside the driving wheel 1, a nozzle 3 for washing the filter cloth 2 is arranged below the driving wheel, a storage tank 4 for receiving the washing liquid is arranged below the filter cloth, the nozzle 3 is connected with an infusion pipeline 5, a filtering device 6 is installed on the infusion pipeline 5, the filtering device 6 includes a housing 601, a first filtering chamber 602 and a second filtering chamber 603 which are communicated with each other are arranged inside the housing 601, columnar first filter element 604 and second filter element 605 are respectively arranged in the first filtering chamber 602 and the second filtering chamber 603, the first filter element 604 and the second filter element 605 are stainless steel filter elements, and the filtering holes of the second filter element 605 are smaller than those of the first filter element 604; an inlet 606 and an outlet 607 which are respectively communicated with the first filtering chamber 602 and the second filtering chamber 603 are further arranged on the housing 601.

[0016] As Figure 2 shown, the housing 601 includes a hollow cylinder 601a and blind flange 601c connected to the top and bottom of the cylinder 601a by connecting bolts 601b; the housing 601 is arranged in a manner that the cylinder 601a and the blind flange 601c are connected, facilitating the disassembly and replacement of the filter element;

[0017] As Figure 1 shown, one end of the infusion pipeline 5 far from the nozzle 3 is connected to a desulfurization process water tank 12, and the desulfurization process water tank 12 is connected to the sewage outlet of the power plant cooling tower 7 through a pipeline; a process water pump 8 is provided on the infusion pipeline 5.

[0018] As Figure 1 shown, in an alternative embodiment, the storage tank 4 is connected to the absorption tower 9 through a pipeline; the water in the storage tank 4 enters the absorption tower 9 to maintain the water balance in the absorption tower 9.

[0019] As Figure 1 shown, in an alternative embodiment, the filtration device 6 is connected in parallel with an isolation pipe 10 for isolating the filtration device 6, and isolation valves 11 are provided on the isolation pipe 10 and at positions on the infusion pipeline 5 close to the filtration device 6; by providing the isolation pipe 10 and the isolation valves 11, the filtration device 6 can be isolated to achieve online maintenance or replacement of the filter element.

[0020] By providing the filtration device 6 in the above embodiment, the filter cloth washing water can be filtered, and after using this embodiment, the situation of nozzle blockage no longer occurs.

[0021] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A filter cloth washing system for a vacuum belt dehydrator, comprising a transmission wheel (1), a filter cloth (2) being sleeved on the outer side of the transmission wheel (1), a nozzle (3) for washing the filter cloth (2) being provided below the transmission wheel, and a storage tank (4) for receiving a washing liquid being provided below the filter cloth, wherein: The nozzle (3) is connected to a liquid infusion pipeline (5), and a filter device (6) is installed on the liquid infusion pipeline (5). The filter device (6) comprises a housing (601), and a first filter chamber (602) and a second filter chamber (603) are provided inside the housing (601), and a first columnar filter element (604) and a second filter element (605) are provided in the first filter chamber (602) and the second filter chamber (603), respectively, and the filter hole of the second filter element (605) is smaller than the filter hole of the first filter element (604); the housing (601) is also provided with an inlet (606) and an outlet (607) which are respectively connected to the first filter chamber (602) and the second filter chamber (603).

2. The vacuum belt dehydrator filter cloth washing system according to claim 1, characterized in that: The housing (601) comprises a hollow cylinder (601a) and blind flanges (601c) connected to the top and bottom of the cylinder (601a) via connecting bolts (601b).

3. The filter cloth washing system of the vacuum belt dehydrator according to claim 1, characterized in that: One end of the liquid delivery pipeline (5) away from the nozzle (3) is connected to a desulfurization process water tank (12), and the desulfurization process water tank (12) is connected to a sewage outlet of a cooling tower (7) of a power plant via a pipeline; a process water pump (8) is provided on the liquid delivery pipeline (5).

4. The filter cloth washing system for a vacuum belt dehydrator according to claim 1, characterized in that: The storage tank (4) is connected to an absorption tower (9) via a pipeline.

5. The vacuum belt dehydrator filter cloth washing system according to claim 1, characterized in that: The filter device (6) is connected in parallel with an isolation pipe (10) for isolating the filter device (6), and an isolation valve (11) is provided on the isolation pipe (10) and at a position on the liquid infusion pipeline (5) close to the filter device (6).

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