Filter press fine slag moisture drying device

Abstract

The utility model provides a filter press fine residue moisture drying device, and relates to the technical field of chemical drying devices.The filter press fine residue moisture drying device comprises a filter press body, an air compressor and a steam heater, the filter press body is communicated with a sewage pipeline, the air compressor is communicated with the steam heater, and an outlet of the steam heater is communicated with a reverse blowing inlet of the filter press body through a pipeline; and the steam heater is communicated with a low-pressure steam source. According to the application, the equipment mainly comprises common parts such as the filter press body, the air compressor, the steam heater, the temperature sensor and the controller, is easy to construct, transform, mount and maintain, has higher practicability and popularization value, and can effectively reduce moisture in fine slag, reduce environmental pollution and effectively improve the operation efficiency of the filter press.

Description

Technical Field

[0001] This application relates to the field of chemical drying equipment technology, and more specifically, to a filter press fine residue moisture drying device. Background Technology

[0002] A filter press is a mechanical device that uses a special filter medium to apply pressure to a material, causing the liquid to seep out. It is a commonly used solid-liquid separation device. It was applied in chemical production in the early 18th century and is still widely used in industries such as chemical, pharmaceutical, metallurgical, dye, food, brewing, ceramics, and environmental protection. The filter plates are stable in performance, easy to operate, safe, and labor-saving; the metal press cylinder is made of seamless steel pipe, and the plastic-coated steel filter plates are precision cast, making them resistant to high temperatures and pressures, and durable.

[0003] The slurry at the bottom of the settling tank is pumped to a slurry buffer tank by an underflow pump, and then fed into the filter chamber of the filter press through the inlet port by a feed pump (the filter chamber is closed during filter press operation). Solid-liquid separation is achieved by the pressure difference created on both sides of the filter medium by the feed pump's pressure. The material is retained within the filter layer, while the filtrate passes through the filter cloth and flows out of the machine into a filtrate tank, where it is pumped back to the settling tank for clarification. After a period of time, the filtrate stops flowing out, the filtration and dewatering process is complete, and feeding is stopped. The filter cake is then pressed with water pumped by a press water pump. When no more liquid flows out, the filter cake is dried with compressed air. Finally, the equipment is opened, the filter cake is removed, the filter cloth is cleaned, and it enters the next filtration cycle.

[0004] Filter presses use pressing water to extract moisture, resulting in relatively high moisture content in the fine residue. During the purging process with compressed air at room temperature, the amount of water carried out is small, which is a drawback. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a filter press fine residue moisture drying device, which aims to improve the problem that the filter press uses pressing water to press water, the fine residue has a relatively high moisture content, and the amount of water carried out during the ambient temperature compressed air purging is small.

[0006] This application is implemented as follows:

[0007] This application provides a filter press fine residue moisture drying device, comprising: a filter press body, an air compressor, and a steam heater;

[0008] The filter press body is connected to the sewage pipeline;

[0009] The air compressor is connected to the steam heater, and the outlet of the steam heater is connected to the backflushing inlet of the filter press body through a pipe;

[0010] The steam heater is connected to a low-pressure steam source.

[0011] In one embodiment of this application, a one-way valve is provided at the backflush port of the filter press body.

[0012] In one embodiment of this application, a pressure sensor is provided inside the filter press body.

[0013] In one embodiment of this application, the steam heater is a shell-and-tube heat exchanger.

[0014] In one embodiment of this application, the steam heater is provided with a temperature sensor and a controller, and the controller is connected to the pressure sensor.

[0015] In one embodiment of this application, the temperature sensor is connected to the valves of the controller and the low-pressure steam source.

[0016] In one embodiment of this application, an air filter is connected between the low-pressure steam source and the steam heater.

[0017] In one embodiment of this application, a pressure reducing valve is provided between the low-pressure steam source and the steam heater.

[0018] In one embodiment of this application, the outlet of the steam heater is provided with a flow regulating valve.

[0019] In one embodiment of this application, the steam heater is externally wrapped with a layer of thermal insulation material.

[0020] The beneficial effects of this application are:

[0021] Effectively reduces moisture content in fine slag: Low-pressure steam is pressurized by an air compressor and then introduced into the steam heater before being transferred to the filter press body for backflushing. The hot air accelerates the evaporation of moisture in the fine slag. Compared with backflushing with ambient temperature compressed air, this method can significantly reduce the moisture content in the fine slag, improve the quality of the fine slag, and enhance the convenience of subsequent processing.

[0022] Reasonable energy utilization: Low-pressure steam source is used as heat source, making full use of the low-pressure steam resources commonly found in industrial production, realizing efficient energy utilization and reducing production costs.

[0023] Temperature controllable: By setting temperature sensors and controllers, the temperature of the heated compressed air can be monitored and adjusted in real time, ensuring the stability and reliability of the backflushing effect and avoiding the effect of reducing the moisture content of fine slag due to excessively high or low temperatures.

[0024] Impurity filtration: An air filter is installed between the compressed low-pressure steam source and the steam heater to effectively filter impurities in the compressed air, preventing impurities from entering the filter press body and affecting the quality of fine residue and normal operation of the equipment.

[0025] Preventing material backflow: The one-way valve at the backflush inlet of the filter press body can prevent the material inside the filter press body from flowing back into the steam heater, avoiding damage to the steam heater and extending the service life of the steam heater.

[0026] Stable steam pressure: The pressure reducing valve between the low-pressure steam source and the steam heater can reduce the high-pressure steam to a stable low-pressure steam, ensuring the normal operation and heating effect of the steam heater.

[0027] Flexible flow regulation: The flow regulating valve at the outlet of the steam heater can adjust the flow rate of the heated compressed air according to the actual needs of the filter press body, thereby improving backflushing efficiency and reducing energy consumption.

[0028] Pressure protection: The pressure sensor inside the filter press works with the controller to adjust the compressed air flow in time when the pressure inside the filter press exceeds the set value, preventing the filter press from being damaged due to excessive pressure and ensuring the safe operation of the equipment.

[0029] Reduced heat loss: The outer shell of the steam heater is wrapped with insulation material, which can effectively reduce heat loss, improve energy efficiency, and reduce operating costs.

[0030] In summary, this equipment mainly consists of common components such as the filter press body, air compressor, steam heater, temperature sensor, and controller. It is easy to construct, modify, install, and maintain, and has high practicality and promotional value. It can effectively reduce the moisture in the fine residue, reduce environmental pollution, and effectively improve the operating efficiency of the filter press. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the overall structure of the filter press fine residue moisture drying device is provided for the embodiments of this application.

[0033] In the diagram: 1. Filter press body; 2. Air compressor; 3. Steam heater; 4. Air filter; 5. Low-pressure steam source; 6. Temperature sensor; 7. Controller. Detailed Implementation

[0034] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0035] like Figure 1 As shown, a filter press fine residue moisture drying device according to an embodiment of this application includes: a filter press body 1, an air compressor 2, and a steam heater 3;

[0036] The filter press body 1 is connected to the sewage pipe. The filter cloth on the filter plate inside the filter press body 1 must be made of high-temperature aramid material with a temperature resistance of ≥120℃. Because the back-blowing air is heated, filter cloth that is not resistant to high temperature will be burned.

[0037] Air compressor 2 is connected to steam heater 3, and the outlet of steam heater 3 is connected to the backflush inlet of filter press body 1 through a pipe;

[0038] The steam heater 3 is connected to the low-pressure steam source 5. The air compressor 2 compresses the low-pressure steam source 5 and flows it into the steam heater 3 for heating. The heated compressed air enters the filter press body 1 to back-blown and dehydrate the mud cake. By heating the compressed air, the moisture in it is dried, which can better back-blown and dehydrate the mud cake.

[0039] The steps for dehydrating mud cakes are as follows:

[0040] 1. After the filter press completes the conventional pressing process, close the feed valve;

[0041] 2. Start the steam heat exchanger and introduce low-pressure steam into the compressed air pipeline for heating;

[0042] 3. High-temperature compressed air enters the filter chamber through the backflush pipeline and continues for 20-40 seconds;

[0043] 4. After backflushing is completed, open the filtrate discharge valve to drain the residual moisture.

[0044] By using high-temperature compressed air (80-120℃) to backflush the filter cake, the capillary structure is destroyed, and the moisture content can be reduced to 10%-15% (compared to 20%-25% for conventional filter presses). The high-temperature air has a bactericidal effect, which can reduce the adhesion of organic matter on the filter cloth surface, extend the filter cloth life by more than 30%, reduce the moisture content of fine residue by more than 60% after dewatering, and reduce transportation costs by 50%, which is in line with the concept of solid waste resource utilization.

[0045] Replacing high-temperature heat transfer oil with low-pressure steam (0.3-0.6MPa) reduces energy consumption by more than 40%, which aligns with the energy-saving approach of dehydrating slag from gasification. The low-pressure steam system operates at a pressure below 0.6MPa, complying with the GB / T30870-2022 Safety Specifications for Pressure Equipment.

[0046] like Figure 1 As shown, a one-way valve is installed at the backflush port of the filter press body 1 to prevent the material in the filter press body 1 from flowing back into the steam heater 3, thus avoiding damage to the equipment.

[0047] Furthermore, a pressure sensor is installed inside the filter press body 1. When the pressure inside the filter press body 1 exceeds the set value, the controller 7 controls the flow regulating valve to reduce the opening, thereby reducing the flow of compressed air entering the filter press body 1. This controls energy consumption and prevents waste.

[0048] like Figure 1 As shown, the steam heater 3 is a shell-and-tube heat exchanger, where compressed air flows in the tube side and low-pressure steam source 5 flows in the shell side.

[0049] Furthermore, the steam heater 3 is equipped with a temperature sensor 6 and a controller 7. The controller 7 is connected to a pressure sensor. The temperature sensor 6 can be used to monitor the temperature of the compressed air after heating in real time, and the controller 7 can control the supply of steam after heating to maximize the utilization of the heated steam.

[0050] Furthermore, the temperature sensor 6 is connected to the valves of the controller 7 and the low-pressure steam source 5. When the temperature detected by the temperature sensor 6 is lower than the set value, the controller 7 controls the valve to increase the opening degree and increase the supply of low-pressure steam; when the temperature is higher than the set value, the controller 7 controls the valve to decrease the opening degree and decrease the supply of low-pressure steam.

[0051] Furthermore, an air filter 4 is connected between the low-pressure steam source 5 and the steam heater 3. The air filter 4 is used to filter impurities in the compressed air, preventing impurities from entering the equipment and effectively increasing the service life of the equipment.

[0052] Furthermore, a pressure reducing valve is installed between the low-pressure steam source 5 and the steam heater 3 to reduce the pressure of high-pressure steam to low-pressure steam, thus preventing an explosion.

[0053] Furthermore, the outlet of the steam heater 3 is equipped with a flow regulating valve to regulate the flow rate of heated compressed air entering the filter press body 1.

[0054] Furthermore, the steam heater 3 is wrapped with an insulation material layer to reduce heat loss.

[0055] Specifically, the working principle of this filter press fine residue moisture drying device is as follows:

[0056] Effectively reduce moisture in fine slag: The low-pressure steam source 5 is pressurized by the air compressor 2 and then introduced into the steam heater 3 before being transmitted to the filter press body 1 for backflushing. The hot air can accelerate the evaporation of moisture in the fine slag. Compared with backflushing with ambient temperature compressed air, it can significantly reduce the moisture content in the fine slag, improve the quality of the fine slag and the convenience of subsequent processing.

[0057] Reasonable energy utilization: Low-pressure steam source 5 is used as a heat source, making full use of the low-pressure steam resources commonly found in industrial production, achieving efficient energy utilization and reducing production costs.

[0058] Temperature controllable: By setting temperature sensor 6 and controller 7, the temperature of the heated compressed air can be monitored and adjusted in real time to ensure the stability and reliability of the backflushing effect and avoid the effect of reducing the moisture content of fine slag due to excessively high or low temperature.

[0059] Impurity filtration: An air filter 4 is installed between the compressed low-pressure steam source 5 and the steam heater 3 to effectively filter impurities in the compressed air and prevent impurities from entering the filter press body 1 and affecting the quality of fine residue and normal operation of the equipment.

[0060] To prevent material backflow: The one-way valve at the backflush inlet of the filter press body 1 can prevent the material in the filter press body 1 from flowing back into the steam heater 3, thus avoiding damage to the steam heater 3 and extending the service life of the steam heater 3.

[0061] Stable steam pressure: The pressure reducing valve between the low-pressure steam source 5 and the steam heater 3 can reduce the high-pressure steam to a stable low-pressure steam, ensuring the normal operation and heating effect of the steam heater 3.

[0062] Flexible flow regulation: The flow regulating valve at the outlet of the steam heater 3 can adjust the flow rate of the heated compressed air according to the actual needs of the filter press body 1, thereby improving the backflushing efficiency and reducing energy consumption.

[0063] Pressure protection: The pressure sensor inside the filter press body 1 works with the controller 7 to adjust the compressed air flow in time when the pressure inside the filter press body 1 exceeds the set value, preventing the filter press body 1 from being damaged due to excessive pressure and ensuring the safe operation of the equipment.

[0064] Reduced heat loss: The outer shell of the steam heater 3 is wrapped with heat-insulating material, which can effectively reduce heat loss, improve energy utilization efficiency, and reduce operating costs.

[0065] In summary, this equipment is mainly composed of common components such as the filter press body 1, air compressor 2, steam heater 3, temperature sensor 6, and controller 7. It is easy to construct, modify, install, and maintain, and has high practicality and promotional value. It can effectively reduce the moisture in the fine residue, reduce environmental pollution, and effectively improve the operating efficiency of the filter press.

[0066] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A filter press fine sludge moisture drying device, characterized by, The filter press body (1), an air compressor (2) and a steam heater (3) are included. The filter press body (1) is communicated with a sewage pipeline. The air compressor (2) is communicated with the steam heater (3), and an outlet of the steam heater (3) is communicated with a back flushing inlet of the filter press body (1) through a pipeline. The steam heater (3) is communicated with a low-pressure steam source (5).

2. The filter press fine sludge moisture drying device according to claim 1, characterized in that, A one-way valve is arranged at the back flushing inlet of the filter press body (1).

3. The filter press fine sludge moisture drying device according to claim 2, characterized in that, A pressure sensor is arranged inside the filter press body (1).

4. The filter press fine sludge moisture drying device according to claim 3, characterized in that, The steam heater (3) is a tube-shell heat exchanger.

5. A filter press fine sludge moisture drying device according to claim 4, characterized in that, A temperature sensor (6) and a controller (7) are arranged on the steam heater (3), and the controller (7) is connected with the pressure sensor.

6. A filter press fine sludge moisture drying device according to claim 5, characterized in that, The temperature sensor (6) is communicated with the controller (7) and a valve of the low-pressure steam source (5).

7. A filter press fine sludge moisture drying device according to claim 6, characterized in that, An air filter (4) is arranged between the low-pressure steam source (5) and the steam heater (3).

8. A filter press fine sludge moisture drying device according to claim 7, characterized in that, A pressure reducing valve is arranged between the low-pressure steam source (5) and the steam heater (3).

9. A filter press fine sludge moisture drying device according to claim 8, characterized in that, A flow regulating valve is arranged at the outlet of the steam heater (3).

10. The filter press fine sludge moisture drying device according to claim 9, characterized in that, The steam heater (3) is wrapped with a layer of heat preservation material.

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