A high-drying sludge high-efficiency pilot system

Abstract

The utility model provides a kind of sludge high dry dehydration high-efficiency pilot system, conditioning unit includes submerged sewage pump, conditioning tank;Submerged sewage pump is connected with conditioning tank by conditioning tank inlet sludge pipe;Conditioning tank sludge discharge pipe is installed at the bottom of conditioning tank;Filter pressing unit includes sludge screw pump, plate-and-frame filter press;Conditioning tank sludge discharge pipe is communicated screw pump inlet sludge pipe, and then sludge screw pump is communicated, and sludge screw pump is communicated with plate-and-frame filter press by filter pressing machine inlet sludge pipe;Accessory unit includes system pipeline, air compressor, flushing water device, filtrate collection device;The submerged sewage pump of conditioning unit is mobile;Plate-and-frame filter press, sludge screw pump are assembled together using pulley bracket, cooperate with detachable pipe line, facilitate integral movement.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection technology, specifically relating to a high-efficiency pilot-scale system for sludge dewatering. Background Technology

[0002] Currently, the domestic environmental protection industry commonly uses plate and frame filter presses for sludge dewatering, which significantly reduces the moisture content of the sludge cake, facilitating transportation and disposal. During the plate and frame sludge dewatering process, sludge dewatering conditioners are needed to condition the sludge, reduce its specific resistance, and promote the removal of free water and some interstitial water. Commonly used sludge dewatering conditioners in the domestic environmental protection industry include ferric chloride and lime. However, with increasingly stringent environmental policies in my country, the use of ferric chloride and lime is gradually being restricted, particularly in the Pearl River Delta and Yangtze River Delta regions. Against this backdrop, actively seeking new alternatives to sludge dewatering conditioners that can meet usage needs while balancing cost and environmental requirements is of great significance to the industry.

[0003] The research and development and promotion of new alternatives to sludge dewatering conditioners requires a series of processes, including small-scale trials, pilot-scale trials, and engineering trials. In actual research and development, after completing small-scale investigations and determining the initial product formulation, pilot-scale trials are necessary to verify the product's actual performance and make corresponding optimizations. However, compared to laboratory small-scale trials, which are easier to conduct, pilot-scale trials are often conducted on a client-side plate and frame press. This is often difficult to achieve, or the testing conditions are quite demanding, such as lack of hardware, difficulties in production coordination, high resource consumption, and long testing times. This makes it difficult to conduct pilot-scale trials quickly and efficiently, significantly impacting research and development efficiency. Summary of the Invention

[0004] This invention provides a pilot-scale system for high-dryness dewatering of sludge, which can establish a pilot-scale rapid screening platform between laboratory small-scale tests and on-machine testing on the owner's plate and frame conveyor. This facilitates rapid testing and optimization of new sludge dewatering conditioner formulations, allows for flexible testing arrangements, does not rely on the owner's hardware, does not affect the owner's production, reduces resource consumption, and shortens testing time, thereby significantly improving R&D efficiency. It enables faster testing and optimization of product formulations, with the aim of launching competitive new products to the market more quickly.

[0005] The present invention adopts the following technical solution: a pilot-scale system for high-dryness dewatering of sludge, comprising a conditioning unit, a filter press unit, and an auxiliary unit.

[0006] The conditioning unit includes a submersible pump and a conditioning tank; the submersible pump is connected to the conditioning tank through the sludge inlet pipe; the sludge outlet pipe of the conditioning tank is installed at the bottom of the conditioning tank; The filter press unit includes a sludge screw pump and a plate and frame filter press; the sludge discharge pipe of the conditioning tank is connected to the sludge inlet pipe of the screw pump, and then to the sludge screw pump, which is connected to the plate and frame filter press through the sludge inlet pipe of the filter press; The auxiliary unit includes system piping, an air compressor, a flushing water device, and a filtrate collection device; the system piping includes a conditioning tank inlet pipe, a screw pump inlet pipe, a filter press inlet pipe, an air compressor pipe, and a filtrate discharge pipe; the conditioning tank inlet pipe is connected to a submersible sludge pump; the filtrate collection device includes a filtrate collection tank, a filtrate discharge pump at the bottom of the filtrate collection tank, and the filtrate discharge pump is connected to the filtrate discharge pipe; an inlet valve is installed between the filter press inlet pipe and the plate and frame filter press. The submersible pump in the conditioning unit is portable, making it easy to use and maintain; the submersible pump and the agitator in the conditioning tank are powered externally.

[0007] The plate and frame filter press and sludge screw pump are assembled together using a pulley bracket and a detachable pipeline with a union joint for easy overall relocation. The pulley bracket is 3-5m long, 1.5-2.5m wide, and 200-500mm high.

[0008] Furthermore, the auxiliary unit also includes a flushing water device, and the system piping also includes a flushing water pipe; the flushing water device includes a flushing water pump and a flushing valve, which are connected through the flushing water pipe.

[0009] Furthermore, the air compressor in the auxiliary unit provides a high-pressure air source for sludge back-blowing and diaphragm secondary pressing of the plate and frame filter press. The air compressor has a discharge capacity of 15~45L / min, a discharge pressure of 4~12bar, an adjustable capacity of 20~40L, and is equipped with a pressure regulating valve and movable pulleys. The flushing water pump in the auxiliary unit has a head of 4~10bar and is used for cleaning the filter cloth of the plate and frame filter press and flushing the pilot plant area.

[0010] Furthermore, the submersible pump in the conditioning unit is used for sludge feeding and discharging from the conditioning tank. The conditioning tank of the conditioning unit is made of corrosion-resistant steel or plastic, and its effective volume is 0.5~1.5m³. 3 .

[0011] Furthermore, the conditioning tank is equipped with a stirrer for mixing during sludge dosing and conditioning, preferably with variable frequency drive for easy adjustment of the stirring intensity. The bottom of the conditioning tank has a sludge discharge pipe and a sludge discharge valve, which are connected to a sludge screw pump via a screw pump inlet pipe.

[0012] Furthermore, the sludge screw pump of the filter press unit is used for feeding sludge into the plate and frame filter press. A frequency converter is preferred to facilitate adjustment of the sludge inlet pressure. The screw pump flow rate is 0.5~1.5 m³ / h. 3 The pump has a head of 6~12 bar and is connected to the sludge discharge valve of the front conditioning tank through the sludge inlet pipe of the screw pump. It is also connected to the sludge inlet of the rear plate and frame filter press through the sludge inlet pipe of the filter press.

[0013] Furthermore, the plate and frame filter press of the filter press unit is preferably a diaphragm type, which can perform secondary pressing of the filter cake. The filtration area of ​​the plate and frame filter press is 1~3m². 2The filter chamber volume is 15~75L, and the single batch yield of oven-dry sludge is 5~25kg. The filtration and diaphragm pressing pressure is controlled within 12 bar. The plate and frame filter press uses filter cloth material and model suitable for high-dryness dewatering of sludge, and is easy to replace.

[0014] Furthermore, the plate and frame filter press is equipped with an electrical control box, which provides power and control circuit for the plate and frame filter press oil pump, as well as power for the sludge screw pump; the plate and frame filter press electrical control box includes pressing and releasing buttons for the plate and frame filter press oil pump, and optimizedly, it also includes the sludge screw pump switch button integrated therein.

[0015] Furthermore, the sludge inlet pipe of the conditioning tank uses a wear-resistant hose for easy use and maintenance. The sludge inlet pipe of the screw pump uses a UPVC pipe, which is connected to the sludge outlet valve of the conditioning tank by a union joint for easy disassembly. The sludge inlet pipe of the filter press uses a UPVC pipe or a steel pipe, which is connected to the sludge screw pump and the sludge inlet flange of the plate and frame filter press. A sludge inlet valve is provided between the filter press sludge inlet pipe and the plate and frame filter press. The air compressor air pipe uses a PU pipe, which, with a quick connector, allows for flexible connection with the plate and frame filter press. Attached Figure Description

[0016] Figure 1 This is a plan view of the pilot-scale system for high-dry dewatering of sludge according to an embodiment of this utility model.

[0017] Figure 2 This is a schematic diagram of the flushing water device of the sludge high-dry dewatering pilot system according to an embodiment of the present invention.

[0018] The meanings of the reference numerals in the diagram are as follows: 1. Conditioning Unit: 1.1 Submersible Sludge Pump; 1.2 Conditioning Tank; 1.2.1 Conditioning Tank Agitator; 1.2.2 Conditioning Tank Sludge Discharge Pipe; 1.2.3 Conditioning Tank Sludge Discharge Valve; 2. Filter Press Unit: 2.1 Sludge Screw Pump; 2.2 Plate and Frame Filter Press; 2.2.1 Electrical Control Box; 2.2.2 Plate and Frame Filter Press Oil Pump; 3. Auxiliary Units: 3.1 Air Compressor; 3.2 Flushing Water Device; 3.2.1 Flushing... 3.2.2 Washing water pump, 3.3 Flushing valve, 3.3 Filtrate collection device, 3.3.1 Filtrate collection tank, 3.3.2 Filtrate discharge pump, 3.4 System piping, 3.4.1 Conditioning tank inlet pipe, 3.4.2 Screw pump inlet pipe, 3.4.3 Filter press inlet pipe, 3.4.3.1 Inlet valve, 3.4.4 Air compressor pipe, 3.4.5 Flushing water pipe, 3.4.6 Filtrate discharge pipe, 3.5 Pulley bracket. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] Example: See Figure 1 , Figure 2 A pilot-scale sludge dewatering system includes a conditioning unit 1, a filter press unit 2, and an auxiliary unit 3.

[0021] Conditioning unit 1 includes a submersible pump 1.1 and a conditioning tank 1.2. The submersible pump 1.1 and the agitator 1.2.1 of the conditioning tank are powered externally. The submersible pump 1.1 is portable for easy use and maintenance. Filter press unit 2 includes a sludge screw pump 2.1 and a plate and frame filter press 2.2. The plate and frame filter press 2.2 is equipped with an electrical control box 2.2.1, which provides power and control circuits for the oil pump 2.2.2 of the plate and frame filter press. The electrical control box 2.2.1 also provides power to the sludge screw pump 2.1. Auxiliary unit 3 consists of an air compressor 3.1, a flushing water device 3.2, a filtrate collection device 3.3, system piping 3.4, and a pulley bracket 3.5. The flushing water device 3.2, as shown in the image... Figure 2 As shown, the system includes a flushing water pump 3.2.1 and a flushing valve 3.2.2, which are connected by a flushing water pipe 3.4.5. The filtrate collection device 3.3 includes a filtrate collection tank 3.3.1 and a filtrate discharge pump 3.3.2 at the bottom of the filtrate collection tank 3.3.1, which is connected to a filtrate discharge pipe 3.4.6. The system piping 3.4 includes a conditioning tank inlet pipe 3.4.1, a screw pump inlet pipe 3.4.2, a filter press inlet pipe 3.4.3, an air compressor pipe 3.4.4, a flushing water pipe 3.4.5, and a filtrate discharge pipe 3.4.6. The filter press inlet pipe 3.4.3 is equipped with an inlet valve 3.4.3.1. The auxiliary units, air compressor 3.1, flushing water pump 3.2.1, and filtrate discharge pump 3.3.2, are powered externally.

[0022] The submersible pump 1.1 of conditioning unit 1 is used for sludge feeding and discharging from conditioning tank 1.2. Conditioning tank 1.2 of conditioning unit 1 is made of corrosion-resistant steel or plastic, and its effective volume is 0.5~1.5 m³. 3 The conditioning tank 1.2 is equipped with a stirrer 1.2.1 for mixing during sludge dosing and conditioning. A frequency converter is preferred for easy adjustment of the stirring intensity. The conditioning tank inlet pipe 3.4.1 is connected to the submersible pump 1.1. The bottom of the conditioning tank 1.2 is equipped with a conditioning tank discharge pipe 1.2.2 and a conditioning tank discharge valve 1.2.3, which are connected to the sludge screw pump 2.1 via the screw pump inlet pipe 3.4.2.

[0023] The sludge screw pump 2.1 of filter press unit 2 is used for sludge feeding into the plate and frame filter press. Variable frequency drive is preferred for easy adjustment of the feed pressure. The screw pump flow rate is 0.5~1.5 m³ / h. 3 The pump operates at a speed of 6-12 bar per hour, with a head of 6-12 bar. The feed pipe 3.4.2 of the screw pump connects to the discharge valve 1.2.3 of the front-end conditioning tank, and the feed pipe 3.4.3 of the filter press connects to the inlet of the rear plate and frame filter press 2.2. The plate and frame filter press 2.2 of filter press unit 2 is preferably a diaphragm type, allowing for secondary pressing of the filter cake. The filtration area of ​​the plate and frame filter press is 1-3 m². 2The filter chamber volume is 15~75L, and the single batch yield of oven-dry sludge is 5~25kg. The filtration and diaphragm pressing pressure is controlled within 12 bar. The plate and frame filter press 2.2 uses filter cloth material and model suitable for high-dryness sludge dewatering, and is easy to replace. The plate and frame filter press electrical control box 2.2.1 includes the oil pump tightening and loosening buttons, and, in an optimized version, also includes an integrated sludge screw pump switch button.

[0024] The plate and frame filter press 2.2 and the sludge screw pump 2.1 are assembled together using a pulley bracket 3.5, and are equipped with detachable piping for easy overall relocation. The pulley bracket 3.5 is 3~5m long, 1.5~2.5m wide, and 200~500mm high.

[0025] The air compressor 3.1 in auxiliary unit 3 provides a high-pressure air source for sludge back-blowing and diaphragm secondary pressing of the plate and frame filter press. The air compressor has a discharge capacity of 15~45L / min, a discharge pressure of 4~12bar, an adjustable capacity of 20~40L, and is equipped with a pressure regulating valve 3.1.1 and movable pulleys 3.1.2. The flushing water pump 3.2.1 in auxiliary unit 3 has a head of 4~10bar and is used for cleaning the filter cloth of the plate and frame filter press and flushing the pilot plant area. The sludge inlet pipe 3.4.1 of the conditioning tank uses a wear-resistant hose for easy use and maintenance. The sludge inlet pipe 3.4.2 of the screw pump uses a UPVC pipe and is connected to the sludge discharge valve 1.2.3 of the conditioning tank via a union for easy disassembly. The sludge inlet pipe 3.4.3 of the filter press uses a UPVC pipe or steel pipe and is connected to the sludge screw pump 2.1 and the sludge inlet flange of the plate and frame filter press 2.2. The air compressor air pipe 3.4.4 is made of PU tubing and is used with quick connectors to achieve flexible connection with the plate and frame filter press 2.2.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A high-efficiency pilot-scale system for high-dryness dewatering of sludge, characterized in that: Includes conditioning unit, filter press unit and auxiliary units; The conditioning unit includes a submersible pump and a conditioning tank; the submersible pump is connected to the conditioning tank through the sludge inlet pipe; the sludge outlet pipe of the conditioning tank is installed at the bottom of the conditioning tank; The filter press unit includes a sludge screw pump and a plate and frame filter press; the sludge discharge pipe of the conditioning tank is connected to the sludge inlet pipe of the screw pump, and then to the sludge screw pump, which is connected to the plate and frame filter press through the sludge inlet pipe of the filter press; The auxiliary unit includes system piping, an air compressor, a flushing water device, and a filtrate collection device; the system piping includes a conditioning tank inlet pipe, a screw pump inlet pipe, a filter press inlet pipe, an air compressor pipe, and a filtrate discharge pipe; the conditioning tank inlet pipe is connected to a submersible sludge pump; the filtrate collection device includes a filtrate collection tank, a filtrate discharge pump at the bottom of the filtrate collection tank, and the filtrate discharge pump is connected to the filtrate discharge pipe; an inlet valve is installed between the filter press inlet pipe and the plate and frame filter press. The submersible pump of the conditioning unit is mobile; the plate and frame filter press and the sludge screw pump are assembled together using a pulley bracket and a detachable pipeline with a flexible connection, which facilitates the overall movement.

2. The high-efficiency pilot-scale system for sludge high-dryness dewatering according to claim 1, characterized in that: The auxiliary unit also includes a flushing water device, and the system piping also includes a flushing water pipe; the flushing water device includes a flushing water pump and a flushing valve, which are connected through the flushing water pipe.

3. The high-efficiency pilot-scale system for sludge high-dryness dewatering according to claim 1, characterized in that: The auxiliary unit air compressor, flushing water pump, and filtrate discharge pump are powered from the outside.

4. The high-efficiency pilot-scale system for sludge high-dryness dewatering according to claim 1, characterized in that: The air compressor has a discharge capacity of 15~45L / min, a discharge pressure of 4~12bar, an adjustable capacity of 20~40L, and is equipped with a pressure regulating valve and movable pulleys; the flushing water pump has a head of 4~10bar.

5. The high-efficiency pilot-scale system for sludge high-dryness dewatering according to claim 1, characterized in that: The mixing containers are made of corrosion-resistant steel or plastic, with an effective volume of 0.5~1.5m³. 3 .

6. The high-efficiency pilot-scale system for sludge high-dryness dewatering according to claim 1, characterized in that: The conditioning tank is equipped with a variable frequency stirrer, and the bottom of the conditioning tank is equipped with a sludge discharge valve, which is connected to the sludge screw pump through the sludge inlet pipe of the screw pump.

7. The high-efficiency pilot-scale system for sludge high-dryness dewatering according to claim 1, characterized in that: The sludge screw pump in the filter press unit uses a variable frequency motor, and the screw pump flow rate is 0.5~1.5m³ / h. 3 The pump has a head of 6~12 bar and is connected to the sludge discharge valve of the front conditioning tank through the sludge inlet pipe of the screw pump. It is also connected to the sludge inlet of the rear plate and frame filter press through the sludge inlet pipe of the filter press.

8. The high-efficiency pilot-scale system for sludge high-dryness dewatering according to claim 1, characterized in that: The plate and frame filter press of the filter press unit is a diaphragm type, and the filtration area of ​​the plate and frame filter press is 1~3m². 2 The filter chamber volume is 15~75L.

9. The high-efficiency pilot-scale system for sludge high-dryness dewatering according to claim 1, characterized in that: The plate and frame filter press is equipped with an electrical control box, which provides power and control circuit for the oil pump of the plate and frame filter press, and also provides power for the sludge screw pump. The electrical control box of the plate and frame filter press includes pressing and releasing buttons for the oil pump of the plate and frame filter press, as well as a switch button for the sludge screw pump.

10. The high-efficiency pilot-scale system for sludge high-dryness dewatering according to claim 1, characterized in that: The conditioning tank inlet pipe uses a wear-resistant water hose; the screw pump inlet pipe uses a UPVC pipe and is connected to the conditioning tank outlet valve via a union; the filter press inlet pipe uses a UPVC pipe or a steel pipe and is connected to the sludge screw pump and the plate and frame filter press inlet flange; an inlet valve is provided between the filter press inlet pipe and the plate and frame filter press; the air compressor air pipe uses a PU pipe and is used with a quick connector to achieve flexible connection with the plate and frame filter press.

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