Filter press filtrate recycling system

Abstract

The application provides a filter press filtrate recycling system and relates to the technical field of filter presses.The filter press filtrate recycling system comprises a filter press, a turbine, an air compressor, a first air storage tank, a second air storage tank and a system air source.The filter press filtrate recycling system can recycle the energy of filtrate and waste gas generated by the filter press, drive the turbine to generate kinetic energy by using the filtrate and waste gas, and drive the air compressor to operate by using the kinetic energy when the filtrate and waste gas flow through the turbine.The air compressor generates compressed air during operation, and the compressed air is stored in the air storage tank and returned to the filter press for use, thereby reducing the operation energy consumption of the filter press and having high application and promotion value.

Description

Technical Field

[0001] The invention relates to the technical field of filter presses, in particular to a filter press filtrate recovery and reuse system. Background Art

[0002] Filter presses are widely used in various fields and are a commonly used solid-liquid separation equipment. The current operation of a vertical filter press includes six steps: static pressure filtration, primary diaphragm extrusion, filter cake washing, secondary diaphragm extrusion, filter cake drying, filter cake discharge, and filter cloth washing. The filter press filters materials under high pressure and produces a large amount of filtrate and exhaust gas (higher pressure gas). For example, during the filter cake drying stage, compressed air enters the filter chamber and passes through the filter cake, removing the moisture remaining between the filter cake particles, thereby reducing the moisture content of the filter cake to an optimal level. The filtrate and exhaust gas contain a certain amount of energy. In the past, this energy was diluted by using a steam-water separator before discharge or discharged directly, which resulted in energy waste. Summary of the Invention

[0003] The object of the present invention is to provide a filter press filtrate recovery and reuse system to achieve the recovery and reuse of the filtrate and waste gas energy generated by the filter press.

[0004] In order to achieve the above objectives, the technical solutions adopted by the present invention are as follows:

[0005] A filter press filtrate recovery and reuse system comprises a filter press, a turbine, an air compressor, a first air storage tank, a second air storage tank and a system air source;

[0006] The filter press is provided with a compressed air inlet and a filtrate outlet, the compressed air inlet is used to introduce compressed air into the filter press, and the filtrate outlet is used to discharge the filtrate and exhaust gas generated by the operation of the filter press;

[0007] The turbine comprises a body, a liquid inlet pipe and a liquid outlet pipe, the body being connected to the liquid inlet pipe and the liquid outlet pipe respectively, a turbine being rotatably connected to the body, and the turbine being coaxially connected to a drive shaft;

[0008] The filtrate outlet is connected to the liquid inlet pipe via a filtrate pipeline, and the filtrate and exhaust gas discharged through the filtrate outlet flow through the liquid inlet pipe, the machine body and the liquid outlet pipe in sequence. When the filtrate and exhaust gas flow through the machine body, the filtrate and exhaust gas drive the turbine to rotate, thereby driving the drive shaft to rotate;

[0009] The input shaft of the air compressor is drivingly connected to the drive shaft;

[0010] The compressed air outlet of the air compressor is connected to the air inlet end of the first air storage tank via a first gas pipeline, and a first check valve is provided on the first gas pipeline;

[0011] The gas outlet of the first gas storage tank is connected to the gas inlet of the second gas storage tank via a second gas pipeline, and a second check valve is provided on the second gas pipeline;

[0012] The system gas source is connected to the gas inlet end of the second gas storage tank via a third gas pipeline, and the third gas pipeline is provided with a first valve and a third check valve;

[0013] The second gas storage tank is connected to the compressed air inlet of the filter press via a fourth gas pipeline, and a second valve and a fourth check valve are provided on the fourth gas pipeline.

[0014] Preferably, a controller is further included, the second gas storage tank is provided with a first pressure transmitter, the first valve is configured as a solenoid valve, and the controller is connected to the first pressure transmitter and the first valve via signal cables respectively.

[0015] Preferably, a second pressure transmitter is provided on the first gas storage tank, and the controller is further connected to the second pressure transmitter via a signal cable.

[0016] Preferably, the second valve is configured as a solenoid valve, and the controller is further connected to the second valve via a signal cable.

[0017] Preferably, the controller is configured as a PLC controller.

[0018] Preferably, the filter press is configured as a vertical filter press.

[0019] The beneficial technical effects of the present invention are:

[0020] The filter press filtrate recovery and reuse system of the present invention can recover and reuse the energy of the filtrate and exhaust gas generated by the filter press, drive the turbine with the filtrate and exhaust gas to generate kinetic energy, and then drive the air compressor to operate to generate compressed air, and accumulate the compressed air in the air storage tank and return it to the filter press for use, thereby reducing the operating energy consumption of the filter press and having high application and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a filter press filtrate recovery and reuse system according to an embodiment of the present invention;

[0022] Figure 2 2 is a cross-sectional view of a parking brake according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and beneficial effects of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. Certain embodiments of the present invention will be more fully described below with reference to the accompanying drawings, some, but not all, of which are illustrated. The various embodiments of the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention satisfies applicable legal requirements.

[0024] In the description of the present invention, it should be noted that the terms "inner," "outer," "upper," "lower," "front," and "rear," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In an embodiment of the present invention, a filter press filtrate recovery and reuse system is provided. Figure 1 、 Figure 2 shown.

[0026] A filter press filtrate recovery and reuse system includes a filter press 1, a turbine 2, an air compressor 3, a first air storage tank 41, a second air storage tank 42 and a system air source 5.

[0027] The filter press 1 is configured as a vertical filter press, and is provided with a compressed air inlet 11 and a filtrate outlet 12 , wherein the compressed air inlet 11 is used to introduce compressed air into the filter press 1 , and the filtrate outlet 12 is used to discharge the filtrate and exhaust gas generated during the operation of the filter press 1 .

[0028] Turbine 2 includes a body 21, an inlet pipe 221, and an outlet pipe 222. Body 21 is connected to both inlet and outlet pipes 221 and 222. A shaft 211 rotates within body 21, connecting it to turbine 212. A gap exists between the end of turbine 212 and the inner wall of body 21. Shaft 211 is coaxially connected to drive shaft 214 via coupling 213.

[0029] The filtrate outlet 12 is connected to the liquid inlet pipe 221 of the turbine 2 via the filtrate pipeline 61. The filtrate and exhaust gas discharged through the filtrate outlet 12 flow through the liquid inlet pipe 221, the body 21 and the liquid outlet pipe 222 in sequence. When the filtrate and exhaust gas flow through the body 21, the filtrate and exhaust gas drive the turbine 212 to rotate, thereby driving the drive shaft 214 to rotate.

[0030] The input shaft of the air compressor 3 is connected to the drive shaft 214. The drive shaft 214 rotates to drive the input shaft of the air compressor 3 to rotate, thereby driving the air compressor 3 to operate and generate compressed air. The generated compressed air is discharged from the compressed air outlet of the air compressor 3.

[0031] The compressed air outlet of the air compressor 3 is connected to the air inlet of the first air tank 41 via a first air pipeline 621. A first check valve 71 is provided on the first air pipeline 621. The compressed air generated by the air compressor 3 has unstable pressure and is first buffered and accumulated in the first air tank 41. The first check valve 71 ensures that compressed air is delivered unidirectionally from the air compressor 3 to the first air tank 41, preventing it from flowing back into the air compressor 3.

[0032] The outlet of the first gas tank 41 is connected to the inlet of the second gas tank 42 via a second gas pipeline 622. A second check valve 72 is provided on the second gas pipeline 622. When the compressed air pressure in the first gas tank 41 is greater than that in the second gas tank 42, the first gas tank 41 supplies compressed air to the second gas tank 42. The second check valve 72 ensures that compressed air is delivered unidirectionally from the first gas tank 41 to the second gas tank 42, preventing the compressed air from flowing back into the first gas tank 41.

[0033] The system gas source 5 is used to provide compressed air. It is connected to the air inlet of the second gas tank 42 via a third gas pipeline 623. A first valve 81 and a third check valve 73 are provided on the third gas pipeline 623. When the first gas tank 41 is low on compressed air, the first valve 81 is opened, allowing the system gas source 5 to deliver compressed air to the second gas tank 42. The third check valve 73 ensures a unidirectional flow of compressed air from the system gas source 5 to the second gas tank 42, preventing compressed air from flowing back into the system gas source 5.

[0034] The second gas tank 42 is connected to the compressed air inlet 11 of the filter press 1 via a fourth gas pipeline 624. The fourth gas pipeline 624 is provided with a second valve 82 and a fourth check valve 74. When the second valve 82 is opened, compressed air is supplied from the second gas tank 42 to the filter press 1. The fourth check valve 74 ensures a unidirectional flow of compressed air from the second gas tank 42 to the filter press 1, preventing the compressed air from flowing back into the second gas tank 42.

[0035] The filter press filtrate recovery and reuse system of this embodiment is automated and includes a controller configured as a PLC. A first pressure transmitter 91 is provided on the second air tank 42, and a first valve 81 is configured as a solenoid valve. The controller is connected to the first pressure transmitter 91 and the first valve 81 via signal cables. The first pressure transmitter 91 is used to detect the pressure of the compressed air in the second air tank 42 in real time. When the pressure value detected by the first pressure transmitter 91 is lower than a set pressure value, the controller determines that there is insufficient compressed air in the first air tank 41. The controller triggers the opening of the first valve 81, and compressed air is supplied from the system air source 5 to the second air tank 42. A second pressure transmitter 92 is provided on the first air tank 41, and the controller is also connected to the second pressure transmitter 92 via a signal cable. The second pressure transmitter 92 is used to detect the pressure of the compressed air in the first air tank 41 in real time and transmit the compressed air pressure value in the first air tank 41 to the controller in real time. The second valve 82 is configured as a solenoid valve. The controller is also connected to the second valve 82 via a signal cable, and the controller triggers the opening and closing of the second valve 82 .

[0036] The filter press filtrate recovery and reuse system of this embodiment operates as follows:

[0037] When the filter press 1 starts working, the filtrate and exhaust gas generated flow into the liquid inlet pipe 221 of the turbine 2 and drive the turbine 212 to rotate. The rotating shaft 211 drives the air compressor 3 to operate through the coupling 213 and the drive shaft 214. The air compressor 3 generates compressed air and enters the first air storage tank 41. As long as the filtrate and exhaust gas can drive the turbine 212 to rotate, compressed air will continue to be generated to replenish the first air storage tank 41. The second pressure transmitter 92 on the first air storage tank 41 can detect the pressure state of the compressed air in the first air storage tank 41 in real time through the PLC controller.

[0038] When the filter press 1 is in operation and a certain process (such as the filter cake drying process) requires compressed air, the second valve 82 is opened, and the compressed air in the second gas tank 42 enters the filter press 1. As the compressed air is consumed, when the pressure value of the second gas tank 42 is lower than the pressure of the first gas tank 41, the compressed air in the first gas tank 41 is replenished to the second gas tank 42 through the second gas pipeline 622 and enters the filter press 1. As the compressed air is consumed, the first pressure transmitter 91 detects that the pressure value in the second gas tank 42 is lower than the set value. At this time, the first valve 81 is opened, and the compressed air from the system gas source 5 enters the second gas tank 42 through the third gas pipeline 623, and then enters the filter press 1 for use.

[0039] So far, this embodiment has been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the filter press filtrate recovery and reuse system of the present invention. The filter press filtrate recovery and reuse system of the present invention can recycle the energy of the filtrate and exhaust gas generated by the filter press 1, drive the turbine 2 with the filtrate and exhaust gas to generate kinetic energy, and then drive the air compressor 3 to generate compressed air, and accumulate the compressed air in the air storage tank and return it to the filter press 1 for use, thereby reducing the operating energy consumption of the filter press 1 and having high application and promotion value.

[0040] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific 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 scope of protection of the present invention.

Claims

1. A filter press filtrate recovery and reuse system, characterized by: Including filter press, turbine, air compressor, first air storage tank, second air storage tank and system air source; The filter press is provided with a compressed air inlet and a filtrate outlet, the compressed air inlet is used to introduce compressed air into the filter press, and the filtrate outlet is used to discharge the filtrate and exhaust gas generated by the operation of the filter press; The turbine comprises a body, a liquid inlet pipe and a liquid outlet pipe, the body being connected to the liquid inlet pipe and the liquid outlet pipe respectively, a turbine being rotatably connected to the body, and the turbine being coaxially connected to a drive shaft; The filtrate outlet is connected to the liquid inlet pipe via a filtrate pipeline, and the filtrate and exhaust gas discharged through the filtrate outlet flow through the liquid inlet pipe, the machine body and the liquid outlet pipe in sequence. When the filtrate and exhaust gas flow through the machine body, the filtrate and exhaust gas drive the turbine to rotate, thereby driving the drive shaft to rotate; The input shaft of the air compressor is drivingly connected to the drive shaft; The compressed air outlet of the air compressor is connected to the air inlet end of the first air storage tank via a first gas pipeline, and a first check valve is provided on the first gas pipeline; The gas outlet of the first gas storage tank is connected to the gas inlet of the second gas storage tank via a second gas pipeline, and a second check valve is provided on the second gas pipeline; The system gas source is connected to the gas inlet end of the second gas storage tank via a third gas pipeline, and the third gas pipeline is provided with a first valve and a third check valve; The second gas storage tank is connected to the compressed air inlet of the filter press via a fourth gas pipeline, and a second valve and a fourth check valve are provided on the fourth gas pipeline.

2. The filter press filtrate recovery and reuse system according to claim 1, characterized in that: It also includes a controller, the second gas storage tank is provided with a first pressure transmitter, the first valve is configured as a solenoid valve, and the controller is connected to the first pressure transmitter and the first valve via signal cables.

3. The filter press filtrate recovery and reuse system according to claim 2, characterized in that: The first gas storage tank is provided with a second pressure transmitter, and the controller is further connected to the second pressure transmitter via a signal cable.

4. The filter press filtrate recovery and reuse system according to claim 2, characterized in that: The second valve is configured as a solenoid valve, and the controller is further connected to the second valve via a signal cable.

5. The filter press filtrate recovery and reuse system according to claim 2, characterized in that: The controller is configured as a PLC controller.

6. The filter press filtrate recovery and reuse system according to claim 1, characterized in that: The filter press is configured as a vertical filter press.

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