CN111875212A - Sludge dewatering device with adjusting and measuring functions - Google Patents

Abstract

The invention discloses a sludge dewatering device with adjustment and measurement functions, comprising a dewatering tank, a dosing device, a screw extruding device and a filter-pressing sludge specific resistance device. The extruding disk is installed in the dewatering tank through a telescopic device. On the top, there are a large number of first water permeable holes and a water filter cloth on the mud squeeze tray, a water receiving tray and a drain pipe are arranged under the mud squeeze tray, and a first outlet with a first solenoid valve is arranged at the low point in the middle of the mud squeeze tray. Mud pipe, the outlet of the first screw extruding device is provided with a second mud pipe arranged horizontally, the bottom side wall of the second mud pipe is provided with a number of second water permeable holes and a water filter cloth, and the second mud pipe is close to the outlet The end is connected with the filter press type sludge specific resistance device through the second solenoid valve; the dosing device is connected with the dehydration tank through the dosing pipe, and is used for adding drugs into the dehydration tank. The device of the invention integrates the sludge dewatering device and the measuring device into a whole, simplifies the operation process, improves the dehydration efficiency, and the ozone generator and the pulsed ultrasonic device can play an environmental protection role.

Description

A sludge dewatering device with adjustment and measurement functions

technical field

The invention belongs to the field of sludge treatment and relates to a sludge dewatering technology, in particular to a sludge dewatering device with adjustment and measurement functions.

Background technique

With the continuous improvement of people's living standards in my country, the sludge output from sewage treatment plants is also increasing year by year. In 2020, the output of municipal sludge in my country will reach 60 million tons to 90 million tons. If it is directly discharged into the environment without safe treatment, it will be Cause environmental pollution, and the high water content of sludge is one of the important reasons affecting the utilization of sludge resources. The undisturbed sludge has a high moisture content. In reality, most of the sludge moisture content is reduced by mechanical dehydration, and the fluid sludge is converted into semi-solid or solid state, depending on the nature of the sludge and the performance of the dewatering device. The dehydration method can reduce the moisture content of the sludge to 40% to 50% and the volume by 60%.

In the sludge dewatering device, the water filter component is often used to dehydrate the sludge, which is in line with the actual sludge dewatering situation. During the dehydration process, the sludge is separated from solid and liquid, and the sewage is discharged separately for centralized storage and treatment. The sludge is removed by mechanical dehydration. In the middle part of the free water and interstitial water, adding flocculants and dehydrating agents during the dehydration process will further improve the dehydration efficiency.

The existing sludge dewatering and sludge measuring devices are independent devices, which require multiple dewatering treatments and measurements, which are cumbersome and inefficient, and cannot quickly complete sludge dewatering. In addition, due to the complex composition of sludge, it is necessary to add flocculants or other dehydrating agents to enhance the dehydration performance, and the existing experimental device is only designed for the mechanical structure. Also affects the final dehydration effect.

After the sludge is mechanically extruded, the dewatering effect is the final result that people care about. It is not only the apparent characteristics of the dewatered sludge, but also the measured value to reflect the dewatering effect of the sludge. How to better combine sludge dewatering and measurement is a long-term concern of technicians. At present, the sludge specific resistance is generally used to measure the dewatering effect in universities and scientific research institutions. However, considering the actual capital, technology and other issues of various enterprises, there is no actual measurement value to measure the dewatering effect after sludge dewatering.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a sludge dewatering device with adjustment and measurement functions, which can quickly determine the sludge dewatering performance, simplify the process of sludge dewatering and measurement, and solve the above-mentioned problems in the background art.

To achieve the above object, the present invention provides the following technical solutions:

A sludge dewatering device with adjustment and measurement functions, comprising a dewatering tank, a dosing device, a screw extruding device and a filter-pressing sludge specific resistance device, characterized in that a mud extruding tray is arranged at the inner bottom of the dewatering tank, Above the mud-squeezing tray, there is a mud-squeezing disc that can move up and down. The mud-squeezing disc is installed on the top of the dewatering tank through a telescopic device, and is driven by the telescopic device to move down in the dewatering tank to complete the water-squeezing function. There are a large number of first water permeable holes on the mud squeeze tray, and the inner surface of the mud squeeze tray is provided with a water filter cloth, a water receiving tray is arranged under the mud squeeze tray, and a drain pipe is arranged on the water receiving tray. There is a first mud pipe at the point, a first solenoid valve is installed in the first mud pipe, the lower end of the first mud pipe is connected to the inlet of the screw extruding device, and the outlet of the screw extruding device is provided with a horizontally arranged No. Second mud pipe, the bottom side wall of the second mud pipe is provided with a plurality of second water permeable holes, the inner wall of the second mud pipe at the second water permeable hole is also provided with a water filter cloth, and the second mud pipe is close to The outlet end is connected with the filter press type sludge specific resistance device through the second solenoid valve, and the dewatered sludge specific resistance is measured by the filter press type sludge specific resistance device; Add medicine to the dehydration tank.

As an improvement, the telescopic device is an electric push rod, the body of the electric push rod is fixed on the top of the dehydration tank, and the mud squeezing pan is fixed at the lower end of the telescopic rod of the electric push rod.

As an improvement, the electric push rod body is provided with a limit block that defines the limit position of the mud squeezing disc, and the limit block is installed under the electric push rod body through a fixing rod.

As an improvement, the medicine dosing device includes a medicine storage tank, a medicine dosing pump and a meter which are connected in sequence through a pipeline, and the outlet of the meter is connected to a medicine addition pipe.

As an improvement, the screw squeezing device includes a squeezing box, a screw squeezing rod and a squeezing motor. The squeezing box is arranged horizontally, and a cylindrical squeezing space is provided therein. The screw squeezing rod is installed It is placed in the mud extruding box, and is connected with the mud extruding motor through a coupling.

As an improvement, an ozone generator is provided on the second mud discharge pipe, and the ozone generated by the ozone generator is connected to the second mud discharge pipe through a pipeline to sterilize and disinfect the sludge.

As an improvement, a timing electromagnetic meter for timing measurement of sludge at different filter press stages is provided between the second solenoid valve and the filter press type sludge specific resistance device.

As an improvement, one or more pulsed ultrasonic devices for cleaning the inside of the tank are provided on the side wall of the dehydration tank.

As an improvement, the mud squeeze tray is a downwardly concave arc-shaped plate; the dehydration tank is a cylindrical tank or a square tank.

As an improvement, the side wall of the dehydration tank is provided with a mud inlet pipe and a visual window for observing the dehydration situation.

The advantages and intentional effects that the present invention has are:

(1) The operation of the electric push rod drives the telescopic rod to reciprocate up and down, and the sludge is squeezed multiple times, so that the water in the sludge is squeezed to the water outlet pipe, and the preliminary dehydration work is completed. After repeated extrusion by the screw extruding rod, the secondary dehydration is completed. The extruded sludge is extruded through the second sludge discharge pipe, and the excess water in the sludge in the sludge extrusion box flows out from the second water permeable hole.

(2) The sludge specific resistance measurement and dewatering device are integrated as a whole, which simplifies the operation of sludge dewatering and measurement, monitors the dewatering effect, and greatly improves the efficiency of sludge dewatering and measurement.

(3) The initial dehydration of the sludge can be observed in time through the visual window, and the addition of the flocculant can be adjusted through the dosing device to increase the reaction efficiency.

(4) The ozone generator and the pulsed ultrasonic device are clean and environmentally friendly equipment, which can clean the dewatering device in time and sterilize the sludge.

Description of drawings

FIG. 1 is a schematic sectional side view of the sludge dewatering device of the present invention.

FIG. 2 is a schematic cross-sectional structural diagram of the second mud outlet pipe of the present invention.

FIG. 3 is a schematic front view of the device of the present invention.

In the picture: 1- Dehydration tank, 2- Electric push rod, 3- Fixed rod, 4- Telescopic rod, 5- Limit block, 6- Mud squeezer, 7- Mud squeeze tray, 8- Water outlet pipe, 9- Section A mud pipe, 10- filter cloth, 11- mud box, 12- first solenoid valve, 13- screw mud rod, 14- coupling, 15- mud motor, 16- second mud pipe , 17-second water permeable hole, 18-dosing device, 19-dosing pump, 20-meter, 21-dosing pipe, 22-visual window, 23-sludge pipe, 24-ozone generator, 25-timing electromagnetic Meter, 26-filter-press type sludge specific resistance device, 27-pulse ultrasonic device, 28-water receiving tray, 29-second solenoid valve, 30-medicine storage tank, 31-first water permeable hole.

Detailed ways

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

The specific embodiments of the present invention will be further described below with reference to the drawings and embodiments of the present invention. The following embodiments are used to illustrate some, but not all, embodiments of the present invention. Meanwhile, the embodiments are only for illustration and are used to explain the present invention. The scope of the invention should not be limited.

1-3, the present invention provides a sludge dewatering device with adjustment and measurement functions, including a dewatering tank 1, a dosing device 18, a screw extruding device and a filter press type sludge specific resistance device 26, a dewatering tank 1 An electric push rod 2 is fixedly installed on the top of the inner side, a fixed rod 3 is installed on the body of the electric push rod 2, a limit block 5 is set at the bottom of the fixed rod 3, and the telescopic rod 4 of the electric push rod 2 is connected with the mud squeezer 6 (the present invention Either a double-bar telescopic electric push rod 2 can be used, or two electric push rods 2 can be arranged side by side, the specific method is not limited), a mud squeeze tray 7 is installed at the bottom of the dehydration tank 1, and the mud squeeze tray 7 is provided with A large number of first water permeable holes 31 (evenly distributed), and the inner surface of the mud squeeze tray 7 is provided with a water filter cloth 10, a water receiving tray 28 is provided below the mud squeezing tray 7, and a drain pipe is provided on the water receiving tray 28 to pass The drain pipe discharges the water out of the dewatering tank 1, and a first mud discharge pipe 9 is provided at the low point in the middle of the mud squeeze tray 7. The first mud discharge pipe 9 is connected to the inlet of the mud squeeze box 11, and the first mud discharge pipe 9 is A first solenoid valve 12 is installed inside the mud discharge pipe 9, the mud squeeze box 11 is arranged horizontally, and a cylindrical mud squeeze space is arranged therein, and a spiral mud squeeze rod is arranged in the cylindrical mud squeeze space of the mud squeeze box 11 13. The screw squeezing rod 13 is connected to the squeezing motor 15 through the coupling 14. The squeezing box 11 and the squeezing motor 15 are both installed at the bottom of the dewatering tank 1. The left end of the squeezing box 11 is provided with a second mud pipe 16. The inside of the mud squeeze box 11 between the second mud discharge pipe 16 and the left end of the screw mud squeeze rod 13 is connected in a funnel shape, which is convenient for diameter reduction and increases the mud discharge pressure in the second mud discharge pipe 16. The second mud discharge pipe 16 is arranged horizontally On the outer surface of the mud squeeze box 11 , the bottom side wall of the second mud pipe 16 is provided with a plurality of second water permeable holes 17 , and the inner wall of the second mud pipe 16 at the second water permeable hole 17 is also provided with a water filter cloth 10 . , the left end of the second mud pipe 16 extends to the outside of the dehydration tank 1, the electric push rod 2, the mud squeeze motor 15, the first solenoid valve 12 and the second solenoid valve 29 are respectively connected with the external power supply, and are controlled by manual switch or by controlling controller control.

The present invention is a sludge dewatering device with adjustment and measurement functions, in which the motor, solenoid valve, ozone generator, pulsed ultrasonic device 27 and filter press type sludge specific resistance device 26 involved are purchased by users themselves. See its instruction manual for usage.

In this embodiment, the operation of the electric push rod 2 drives the telescopic rod 4 to move up and down, and the squeezing plate 6 connected to the telescopic rod 4 moves up and down in the dewatering tank 1 to squeeze and dehydrate the sludge, and the water outlet pipe 8 is installed in the extrusion On the water receiving tray 28 below the mud tray 7, the extruded water is discharged to complete the preliminary dehydration work. In the mud extruding box 11, through the screw push of the screw extruding rod 13, the second time in the mud extruding box 11 is completed. Dewatering, the sludge after secondary dewatering is discharged through the second mud discharge pipe 16, the water is discharged through the second water permeable hole 17 at the bottom of the second mud discharge pipe 16, and the interior of the dewatering tank 1 can be observed through the setting of the transparent visual window 22 If the dewatering situation is different, the dosing device 18 can add flocculant to the dewatering tank 1 through the dosing pipe 21 to increase the efficiency of sludge dewatering. The staff can control the sludge in the first mud pipe 9 through the first solenoid valve 12. circulation.

As a specific embodiment, the dosing device 18 is composed of a drug storage tank 30, a dosing pump 19 and a meter 20. The meter 20 controls the actual operation timing and quantitative dosing. One end of the dosing pipe 21 is connected to the outlet of the meter 20, and the other One end is connected to the inside of one side of the dehydration tank 1 .

As a specific embodiment, the fixed rod 3 is installed on the body of the electric push rod 2, and the bottom of the fixed rod 3 is provided with a limit block 5. The setting of the limit block 5 can control the stroke of the mud squeezing plate 6, so as to avoid a relatively large working range. If the electric push rod 2 is greatly damaged, of course, a contact switch or an induction switch can also be set on the limit block 5, and the electric push rod 2 can be automatically stopped by sending a signal through the contact switch and the induction switch.

As a specific embodiment, the second mud pipe 16 is provided with an ozone generator 24, and the ozone generated by the ozone generator 24 is connected to the second mud pipe 16 through a pipeline to sterilize the sludge.

As a specific embodiment, the second mud pipe 16 is provided with a measurement port near the outlet end, and the measurement port is connected to the filter-press type sludge specific resistance device 26 through the second solenoid valve 29, The device 26 measures the specific resistance of the sludge after dewatering, and a timed electromagnetic meter 25 is arranged between the second solenoid valve 29 and the filter press type sludge specific resistance device 26 to measure the sludge at different filter press stages.

As a specific embodiment, a transparent visual window 22 is provided on the front of the dehydration tank 1, and the visual window 22 is made of tempered glass or plexiglass. The mud inlet pipe 23 is connected to the interior of the dewatering tank 1, and the visual window 22 is convenient for the staff to check the initial dewatering of the sludge inside the dewatering tank 1, and the staff can improve the sludge dewatering efficiency according to the dosing device 18.

As a specific embodiment, pulsed ultrasonic devices 27 are installed on both sides of the dehydration tank 1 to clean the interior of the dehydration tank 1 through different filter press stages, so as to avoid inaccurate measurement results caused by the mixing of sludges with different specific resistances and reduce the Sludge dewatering efficiency.

As a specific embodiment, the mud squeezing tray 7 is a downwardly concave arc-shaped plate; the dehydration tank 1 is a cylindrical tank or a square tank, and the specific form is not limited, such as FIG. 1 and FIG. 3 in the embodiment of the present invention Among them, the dehydration tank 1 is a square tank, and the mud squeezing tray 6 is also a square correspondingly. If the dehydration tank 1 is a cylindrical tank, the mud squeezing tray 6 is correspondingly disc-shaped.

The working principle and process of the present invention: put sludge into the dewatering tank 1 through the mud feeding pipe 23, start the electric push rod 2 to start working, the electric push rod 2 works to drive the telescopic rod 4 to extend, and the extruder connected to the telescopic rod 4 The mud pan 6 goes down to squeeze and filter the sludge, and the squeezed water is discharged through the water outlet pipe 8 to complete the preliminary dehydration work. The first solenoid valve 12 is opened, and the sludge enters the mud squeeze box through the first mud outlet pipe 9. In 11, the screw extruding rod 13 is driven to rotate by the extruding motor 15, and the sludge is deeply dehydrated. The water filter cloth 10 and the second permeable hole 17 in the mud pipe 16 can complete the secondary dehydration process, and the ozone generator 24 is set in the second mud pipe 16 to sterilize and disinfect the sludge, and then measure the specific resistance of the sludge. , a second solenoid valve 29 is set at the measuring port at the outlet end of the second mud pipe 16, and the sludge is periodically measured by the timed electromagnetic meter 25 to measure different pressure filtration stages, and the sludge is measured by the pressure filter type sludge specific resistance device 26. specific resistance.

Example 1, product and material parameters: mud squeezing motor 15: a motor with a power of 20kW and a speed of 2900r/min, wet sludge with a moisture content of 566%. 1 ton of municipal sludge is dewatered for 30 minutes. After dehydration, the water content of the sludge is 200% to 230%, and the specific resistance of the sludge is 5 to 6×10 ¹³ m/kg.

Example 2, product and material parameters: mud squeezing motor 15: a motor with a power of 20kW and a speed of 2900r/min, wet sludge with a moisture content of 566%, and 0.01g/g ferric chloride flocculant. 1 ton of municipal sludge is dewatered for 30 minutes. After dehydration, the water content of the sludge is 150% to 180%, and the specific resistance of the sludge is 2 to 3×10 ¹³ m/kg.

Example 3, product and material parameters: mud squeezing motor 15: motor with a power of 20kW and a speed of 2900r/min, wet sludge with a moisture content of 566%, 0.01g/g ferric chloride flocculant, and 0.3g/g lime. 1 ton of municipal sludge is dewatered for 30 minutes. After dehydration, the water content of the sludge is 100% to 120%, and the specific resistance of the sludge is 0.8 to 1×10 ¹³ m/kg.

Example 4, product and material parameters: mud squeezing motor 15: power 20kW speed 2900r/min motor, 566% moisture content wet sludge, 0.01g/g ferric chloride flocculant, 0.3g/g lime, 0.01g/g fly ash. 1 ton of municipal sludge is dewatered for 30 minutes. After dehydration, the water content of the sludge is 70% to 90%, and the specific resistance of the sludge is 0.25 to 0.4×10 ¹³ m/kg.

The above are the embodiments of the patent of the present invention, which should be used as an example and not a limitation. For those of ordinary skill in the art, improvements and replacements can be made without departing from the principles of the technology of the present invention. These improvements And replacement should also be regarded as the protection scope of the patent of the present invention.

Claims (10)

1. The utility model provides a sludge dewatering device with adjust and measurement function, includes dehydration jar, offe medicine device, spiral mud extrusion device and filter-pressing formula mud specific resistance device which characterized in that: the bottom in the dewatering tank is provided with a mud-squeezing tray, a mud-squeezing disc capable of moving up and down is arranged above the mud-squeezing tray, the mud-squeezing disc is arranged at the top in the dewatering tank through a telescopic device, the mud-squeezing disc is driven by the telescopic device to move downwards in the dewatering tank to complete a water-squeezing function, a large number of first water-permeable holes are formed in the mud-squeezing tray, water-filtering cloth is arranged on the inner side surface of the mud-squeezing tray, a water-receiving disc is arranged below the mud-squeezing tray, a water-discharging pipe is arranged on the water-receiving disc, a first mud-discharging pipe is arranged at the lower point of the middle part of the mud-squeezing tray, a first electromagnetic valve is arranged in the first mud-discharging pipe, the lower end of the first mud-discharging pipe is connected with the inlet of the spiral mud-squeezing device, the outlet of the spiral mud-squeezing device is provided with a horizontally-arranged second mud-discharging pipe, a plurality of second water-permeable holes are formed in the side wall of the bottom of the second mud-discharging pipe, measuring the specific resistance of the dewatered sludge by a filter-press type sludge specific resistance device; the dosing device is connected with the dehydration tank through a dosing pipe and is used for dosing into the dehydration tank.

2. The sludge dewatering apparatus according to claim 1, characterized in that: the telescoping device is electric putter, and electric putter's body is fixed at the dehydration tank top, and crowded mud dish is fixed at electric putter's telescopic link lower extreme.

3. The sludge dewatering apparatus according to claim 2, characterized in that: the electric push rod body is provided with a limiting block for limiting the limit position of the mud-squeezing disc, and the limiting block is installed below the electric push rod body through a fixing rod.

4. The sludge dewatering apparatus according to claim 2, characterized in that: the dosing device comprises a medicine storage tank, a dosing pump and a meter which are sequentially connected through a pipeline, and an outlet of the meter is connected with a dosing pipe.

5. The sludge dewatering apparatus according to claim 4, characterized in that: the spiral mud-extruding device comprises a mud-extruding box, a spiral mud-extruding rod and a mud-extruding motor, wherein the mud-extruding box is horizontally arranged, a cylindrical mud-extruding space is arranged in the mud-extruding box, the spiral mud-extruding rod is arranged in the mud-extruding box and is connected with the mud-extruding motor through a coupler, and the joint of the mud-extruding box and the second mud-outlet pipe is in a horn-shaped diameter reduction mode.

6. The sludge dewatering apparatus according to claim 5, characterized in that: and the second sludge outlet pipe is provided with an ozone generator, and ozone generated by the ozone generator is connected into the second sludge outlet pipe through a pipeline to sterilize and disinfect sludge.

7. The sludge dewatering apparatus according to any one of claims 1 to 6, wherein: and a timing electromagnetic meter for performing timing measurement on the sludge at different filter-pressing stages is arranged between the second electromagnetic valve and the filter-pressing type sludge specific resistance device.

8. The sludge dewatering apparatus according to claim 7, characterized in that: and one or more pulse type ultrasonic devices for cleaning the interior of the dewatering tank are arranged on the side wall of the dewatering tank.

9. The sludge dewatering apparatus according to any one of claims 1 to 6, wherein: the mud-extruding tray is a downward concave arc-shaped plate; the dewatering tank is a cylindrical tank or a square tank.

10. The sludge dewatering apparatus according to any one of claims 1 to 6, wherein: and the side wall of the dehydration tank is provided with a sludge inlet pipe and a visible window for observing the dehydration condition.

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