Sludge drying workshop

Abstract

The utility model relates to the field of sludge treatment, in particular to a sludge drying workshop which comprises a discharging bin installed in the workshop, a sensor used for detecting dust concentration is installed in the discharging bin, the sensor is electrically connected with a dust removal device, and an air inlet of the dust removal device is communicated to the discharging bin. A sludge meter is mounted in the primary washing water tank and is electrically connected with the aeration device. According to the working condition in the sludge drying workshop, when the unloading bin generates dust, the dust removal device is started to suck away the dust, so that the dust is prevented from escaping to the workshop, and the workshop can keep a low dust concentration state even when the unloading bin works.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment, and more specifically, to a sludge drying workshop. Background Technology

[0002] In the sludge drying workshop of a wastewater treatment plant, dust and odor control are crucial for ensuring a healthy and safe working environment. Currently, existing sludge drying workshops simply remove dust using dust removal equipment, without implementing different dust control measures based on varying operating conditions. When large amounts of dust are generated, they cannot be removed promptly, resulting in ineffective dust removal. Utility Model Content

[0003] To overcome the dust problem in the existing sludge drying workshop, this utility model provides a sludge drying workshop that can provide a better internal environment.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sludge drying workshop, including a discharge silo and a dust removal device both installed in the workshop; the discharge silo is equipped with a sensor for detecting dust concentration, the sensor is electrically connected to the dust removal device, and the air inlet of the dust removal device is connected to the discharge silo.

[0005] In the above technical solution, the sensor detects the dust concentration generated by the unloading hopper. When the unloading hopper is unloading sludge, if the sensor detects that the powder concentration is greater than the preset threshold, the dust removal device is started or operates at a higher power to quickly remove the dust generated by the unloading hopper during the unloading process, ensuring that the dust will not escape to other parts of the workshop and cause an increase in dust in the workshop.

[0006] Furthermore, the sensor is installed on the top of the unloading hopper. When the unloading hopper is unloading sludge, the dust generated rises upwards. The sensor located on the top of the unloading hopper can promptly detect the increase in dust concentration at the top of the unloading hopper, thereby identifying whether the dust concentration exceeds the threshold. This allows the dust removal device to be activated in time to remove the dust, preventing dust from overflowing into the workshop before dust removal is initiated.

[0007] Furthermore, the air inlet of the dust removal device is located above the unloading hopper. The dust removal device can promptly remove the dust generated at the unloading hopper, reducing the dust concentration that escapes to other parts of the workshop and solving the problem of dust escape from the largest dust source in the workshop. Even if the unloading hopper generates a large amount of dust in a short period of time during unloading, most of the dust can be removed in time.

[0008] Furthermore, the dust removal device includes a cyclone dust collector and a fan. One end of the cyclone dust collector is connected to the unloading hopper via an inlet pipe, and the other end is connected to the fan. An outlet pipe is installed at the outlet end of the fan. The fan generates negative pressure, allowing the inlet pipe to draw away dust from the unloading hopper. The air mixed with dust is then discharged as cleaner air after the dust is removed by the cyclone dust collector. The outlet end of the outlet pipe can be connected to the exhaust gas treatment area of ​​the sludge drying workshop, where the dust-removed airflow is treated together with the exhaust gas.

[0009] Furthermore, the fan is a variable frequency fan. A variable frequency fan can adjust its operating power according to the dust concentration, adapting to different working conditions.

[0010] Furthermore, the system includes a pre-wash tank equipped with an aeration device and a sludge meter electrically connected to the aeration device. The pre-wash tank is the first piece of equipment in the sludge workshop's deodorization system. The deodorization inlet duct introduces odorous air into the pre-wash tank for pre-washing. However, the odorous air entering the tank carries a large amount of dust particles, which accumulate and eventually form a layer of sludge. If this sludge adheres to the tank, regular cleaning is necessary. However, due to insufficient space inside the tank and the strong odor requiring the deodorization system to be temporarily shut down, cleaning would drastically deteriorate the environment of the sludge drying workshop. By installing the aeration device and sludge meter, once the sludge has accumulated to a certain length, the aeration device blows it up, and the water in the pre-wash tank carries it away, eliminating the need for manual cleaning and preventing the odor from spreading to other parts of the workshop, thus maintaining a better environment inside the sludge drying workshop.

[0011] Furthermore, the sludge meter is installed above the sludge discharge port of the primary wash tank, at a vertical distance of 270mm-300mm. When the sludge accumulation in the primary wash tank reaches 270mm-300mm, it is prone to producing an odor. By detecting the sludge height using the sludge meter at this point, the aeration device can be activated to aerate the sludge. Activating the aeration device only after a certain amount of sludge has accumulated avoids prolonged operation of the aeration device, thus conserving resources.

[0012] Furthermore, the vertical distance between the sludge meter and the sludge discharge port of the primary wash water tank is 300mm.

[0013] Furthermore, a baffle is installed above the sludge meter in the initial wash water tank, and the sludge meter is located within the coverage area of ​​the baffle. The coverage area refers to the vertical projection area of ​​the sludge meter within the baffle. When the initial wash water tank sprays water, the baffle can prevent the sludge meter from being sprayed, thus preventing water flow or droplets from affecting the measurement accuracy.

[0014] Furthermore, one end of the baffle is connected to the initial rinse water tank, and the other end is inclined towards the bottom of the initial rinse water tank. The sprayed water can also flow downwards along the baffle, avoiding water accumulation.

[0015] Furthermore, it also includes a controller. The sensor is electrically connected to the dust removal device through the controller, and the sludge meter is electrically connected to the aeration device through the controller. The controller can perform statistical signal processing and equipment control. After the signals from the sensor and the sludge meter are sent to the controller, the controller processes them and sends the corresponding processed signals to the aeration device and the dust removal device, enabling automated control in conjunction with other equipment in the dust removal workshop.

[0016] Compared with existing technologies, the beneficial effects are: based on the working conditions in the sludge drying workshop, and addressing the dust concentration issue, when dust is generated in the unloading hopper, the dust removal device is activated to remove this part of the dust to prevent dust from escaping into the workshop, so that the workshop can maintain a low dust concentration even when the unloading hopper is in operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a sludge drying workshop according to the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the initial wash water tank of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the initial washing water tank of this utility model.

[0020] In the diagram, 100-unloading hopper; 200-primary wash water tank; 210-aeration device; 220-sludge meter; 230-spray layer; 240-packing layer; 250-demisting section; 260-straight section of the box; 270-conical end; 280-sludge discharge section; 290-sludge discharge pipe; 300-dust removal device; 310-cyclone dust collector; 320-fan; 400-sensor; 500-baffle. Detailed Implementation

[0021] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0022] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0026] Example 1

[0027] like Figure 1 and Figure 3 The illustration shows an embodiment 1 of a sludge drying workshop, which includes a discharge bin 100, a primary wash tank 200, and a dust removal device 300, all installed within the workshop. The primary wash tank 200 is equipped with an aeration device 210 and also includes the dust removal device 300. The discharge bin 100 is equipped with a sensor 400 for detecting dust concentration, which is electrically connected to the dust removal device 300. The air inlet of the dust removal device 300 is connected to the discharge bin 100. The primary wash tank 200 is equipped with a sludge meter 220, which is electrically connected to the aeration device 210.

[0028] Specifically, sensor 400 is a dust detector installed on the top of unloading silo 100. When unloading sludge from unloading silo 100, the generated dust rises upwards. Sensor 400, located on the top of unloading silo 100, can promptly detect the increase in dust concentration at the top of unloading silo 100, thereby identifying whether the dust concentration exceeds the threshold. This allows the dust removal device 300 to be activated in time to remove the dust, preventing dust from escaping into the workshop before dust removal is initiated.

[0029] In this embodiment, the air inlet of the dust removal device 300 is located above the unloading hopper 100. The dust removal device 300 can promptly remove the dust generated at the unloading hopper 100, reducing the dust concentration that can escape to other parts of the workshop and solving the problem of dust escape from the largest dust source in the workshop. Even if the unloading hopper 100 generates a large amount of dust in a short period of time during unloading, most of the dust can be removed in time.

[0030] In this embodiment, the dust removal device 300 includes a cyclone dust collector 310 and a fan 320. One end of the cyclone dust collector 310 is connected to the top of the unloading hopper via an inlet pipe, and the other end is connected to the fan 320. An outlet pipe is installed at the outlet end of the fan 320. The fan 320 generates negative pressure, allowing the inlet pipe to draw away dust from the unloading hopper 100. The air mixed with dust is then discharged as cleaner air after the dust is removed by the cyclone dust collector 310. The outlet end of the outlet pipe can be connected to the exhaust gas treatment area of ​​the sludge drying workshop, where the dust-removed airflow is treated together with the exhaust gas. The fan 320 is a variable frequency fan. The variable frequency fan can adjust its operating power according to the dust concentration, adapting to different working conditions.

[0031] The existing sludge drying workshop equipment and process flow consist of a sludge thickening tank system, a conditioning tank system, a low-temperature vacuum dewatering and drying main unit system, a sludge feeding system, a pressing and heating system, a heat pump system, a vacuum cooling system, an air compression system, a material conveying system, a deodorization system, and an automatic control system. The specific process is as follows: sludge is discharged to a gravity thickening tank for initial storage to reduce sludge volume and effectively lower moisture content. Then, it is pumped into a sludge conditioning tank via a sludge rotor pump for chemical dosing (addition of PAC). Finally, it is pumped into a low-temperature vacuum dewatering system by a sludge screw pump, while simultaneously adding flocculant (PAM) online. Pump pressure forces the filtrate through the filter medium and discharges, completing the liquid-solid two-phase separation. Initially, the filter cake layer on the filter cloth is thin, resulting in low filtration resistance, thus allowing for a large feed rate. As filtration progresses, the filter cake gradually thickens, and the porosity of the filter cake relatively decreases, leading to increased filtration resistance and a reduction in the feed rate. The feeding filtration period ends when the material fills the filter chamber. During the compaction and cake-forming stage, high-pressure water within the diaphragm plate generates a pressing force, breaking down the "arches" formed between material particles, thus compacting the filter cake and squeezing out the filtrate remaining between the particles. Capillary water in the filter cake is then displaced by a strong compressed air stream, further expelling it and minimizing moisture content. Building upon this, the low-temperature vacuum dehydration and drying technology adds a vacuum drying function. After diaphragm filtration, hot water is introduced into the heating plate and diaphragm plate to heat the filter cake in the chamber. Simultaneously, a vacuum pump is activated to create a vacuum within the chamber, lowering the boiling point of water. The water in the filter cake boils and vaporizes. The vapor-water mixture extracted by the vacuum pump passes through a condenser, where it is separated from the water. The liquid water is periodically discharged, and the exhaust gas is purified before being released. After processing through feed filtration, diaphragm filtration, and vacuum thermal drying, the sludge in the filter cake is thoroughly dehydrated, significantly reducing the amount of sludge and maximizing sludge reduction. After treatment, the sludge is conveyed by conveying equipment such as conveying screws, crushers, and scrapers in the conveying system to two silos for temporary storage, and then transported by vehicles to the disposal unit for incineration and power generation for harmless treatment.

[0032] The unloading hopper in this embodiment contains a material conveying system and a silo for storing sludge.

[0033] The working principle or workflow of this embodiment is as follows: The sludge drying workshop is equipped with dust removal equipment for purifying exhaust gas and a purification system to purify the air within the workshop to remove dust and odors that have escaped into the workshop. However, the purification system in the sludge drying workshop typically operates continuously or only begins operation when a high dust concentration is detected. This results in a delay, meaning that purification only begins when the dust concentration has already significantly impacted the working environment. Furthermore, the purification system may be unable to handle sudden increases in dust concentration in a timely manner. In this embodiment, a dust removal device 300 and a targeted dust detector are further added to the workshop. The dust detector detects the dust concentration generated by the unloading hopper 100. When the unloading hopper 100 unloads sludge, the sludge unloading includes sludge entering the hopper and material leaving the hopper. When the sensor 400 detects that the dust concentration is greater than the preset threshold, the dust removal device 300 is started or operates at a higher power to quickly remove the dust generated by the unloading hopper 100 during the unloading process, ensuring that the dust will not escape to other parts of the workshop and cause an increase in dust in the sludge drying workshop.

[0034] The initial rinse tank is part of the deodorization system. In this embodiment, as... Figure 2 As shown, the primary wash tank 200, as existing equipment in the sludge drying workshop, comprises, from bottom to top, a spray layer 230, a packing layer 240, a demisting section 250, a straight section 260, a conical end 270, and a sludge discharge section 280. The sludge discharge section is equipped with a sludge discharge pipe 290 fitted with a valve. An aeration device 210 and a drain pipe fitted with a valve are installed on the inner bottom surface of the primary wash tank 200. The demisting section 250 is equipped with a demister. When the sludge accumulates to a certain length, the aeration device 210 blows the sludge away, and the water in the primary wash tank carries the sludge away, discharging it through the sludge discharge pipe 290. This eliminates the need for manual cleaning by staff, preventing odor from spreading to other parts of the workshop and maintaining a better environment inside the sludge drying workshop.

[0035] The beneficial effects of this embodiment are as follows: Based on the working conditions in the sludge drying workshop, and addressing the dust concentration issue, when dust is generated in the unloading hopper 100, the dust removal device 300 is activated to remove this portion of the dust, preventing it from escaping into the workshop. This ensures that the workshop maintains a low dust concentration even when the unloading hopper 100 is operating. By automatically removing sludge from the primary washing tank, the manual cleaning of the tank avoids the generation of large amounts of odor in the workshop, which would otherwise be impossible to deodorize. This not only reduces the source of odor but also reduces the workload of the workers. The combination of these two measures purifies and maintains the environment of the sludge drying workshop.

[0036] Example 2

[0037] Example 2 of a sludge drying workshop, based on Example 1, differs from Example 1 in that, as shown in 3, the initial washing water tank 200 is further defined.

[0038] The sludge meter 220 is installed above the sludge discharge port of the primary wash tank 200, at a vertical distance of 270mm-300mm. When the sludge accumulation in the primary wash tank 200 reaches 270mm-300mm, the aeration device 210 is activated to aerate the sludge, thus avoiding prolonged operation of the aeration device and saving resources. In this embodiment, the vertical distance between the sludge meter 220 and the sludge discharge port of the primary wash tank 200 is 300mm.

[0039] Furthermore, a baffle 500 is installed above the sludge meter 220 in the initial wash tank 200, and the sludge meter 220 is located within the coverage area of ​​the baffle 500. The coverage area refers to the vertical projection area of ​​the baffle 500 where the sludge meter 220 is located. When the initial wash tank 200 sprays water, the baffle 500 can prevent the sludge meter 220 from being sprayed, thus preventing water flow or droplets from affecting the measurement accuracy.

[0040] One end of the baffle 500 is connected to the pre-wash water tank 200, and the other end is inclined towards the bottom of the pre-wash water tank 200. The spray water can also flow down along the baffle 500 to avoid water accumulation.

[0041] The remaining features and working principles of this embodiment are the same as those of Embodiment 1.

[0042] Example 3

[0043] Embodiment 3 of a sludge drying workshop, based on Embodiment 2, further includes a controller. Sensor 400 is electrically connected to dust removal device 300 via the controller, and sludge meter 220 is electrically connected to aeration device 210 via the controller. The controller can perform statistical signal processing and equipment control. Signals from sensor 400 and sludge meter 220 are sent to the controller, processed, and then the corresponding processed signals are sent to aeration device 210 and dust removal device 300, enabling automated control in conjunction with other equipment in the dust removal workshop.

[0044] The remaining features and working principles of this embodiment are the same as those of Embodiment 2.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A sludge drying workshop, comprising unloading silos (100) installed within the workshop, characterized in that, It also includes a dust removal device (300); the unloading hopper (100) is equipped with a sensor (400) for detecting dust concentration, the sensor (400) is electrically connected to the dust removal device (300), and the air inlet of the dust removal device (300) is connected to the unloading hopper (100).

2. The sludge drying workshop according to claim 1, characterized in that, The sensor (400) is installed on the top of the unloading hopper (100).

3. The sludge drying workshop according to claim 2, characterized in that, The air inlet of the dust removal device (300) is located above the unloading hopper (100).

4. A sludge drying workshop according to claim 3, characterized in that, The dust removal device (300) includes a cyclone dust collector (310) and a fan (320). One end of the cyclone dust collector (310) is connected to the unloading hopper (100) through an air inlet pipe, and the other end is connected to the fan (320). An air outlet pipe is installed at the air outlet end of the fan (320).

5. A sludge drying workshop according to claim 4, characterized in that, The fan (320) is a variable frequency fan.

6. A sludge drying workshop according to any one of claims 1-5, characterized in that, It also includes a primary wash tank (200), which is equipped with an aeration device (210); a sludge meter (220) is installed in the primary wash tank (200), and the sludge meter (220) is electrically connected to the aeration device (210).

7. A sludge drying workshop according to claim 6, characterized in that, The sludge meter (220) is installed above the sludge discharge port of the primary wash water tank (200) and at a vertical distance of 270mm-300mm from the sludge discharge port.

8. A sludge drying workshop according to claim 6, characterized in that, The initial wash tank (200) is located above the sludge meter (220) and is equipped with a baffle (500), with the sludge meter (220) located within the coverage area of ​​the baffle (500).

9. A sludge drying workshop according to claim 8, characterized in that, One end of the baffle (500) is connected to the initial wash water tank (200), and the other end is inclined toward the bottom of the initial wash water tank (200).

10. A sludge drying workshop according to claim 6, characterized in that, It also includes a controller, the sensor (400) being electrically connected to the dust removal device (300) via the controller, and the sludge meter (220) being electrically connected to the aeration device (210) via the controller.

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