CN111153234A - Sludge drying discharging device and control method - Google Patents

Abstract

The invention discloses a sludge drying discharging device which comprises a discharging spiral shell, a conveying screw rod and a control system, wherein the conveying screw rod comprises a threaded section and a non-threaded section for accumulating sludge, and the threaded section and the non-threaded section are alternately arranged and connected into a whole; the control method comprises the following steps: closing the switch valve at the inlet end, and conveying the dried sludge into the temporary storage barrel; when the sludge level in the temporary storage barrel is detected to reach the position between the preset highest position and the preset lowest position, the control system starts the conveying screw to work; when each thread-free section sequentially detects that the sludge compactness is within a preset value range, gradually adjusting the rotating speed of the conveying screw rod to reduce to a preset rotating speed value; when the discharge end detects that the sludge is continuously discharged, the control system keeps the conveying screw to normally work, otherwise, the conveying process is judged to be abnormal, and the conveying screw and the sludge drying equipment are stopped. The control method can realize monitoring of the whole conveying process of the sludge in the discharging spiral shell.

Description

Sludge drying discharging device and control method

Technical Field

The embodiment of the invention relates to the technical field of sludge treatment, in particular to a sludge drying discharging device and a control method.

Background

Municipal sludge and industrial sludge after sewage treatment are treated by the traditional mechanical dehydration process, and the water content of the sludge is still high. The large-yield sludge often contains certain pollutants and toxic and harmful substances, so that certain environmental risks are brought to the subsequent transportation link, and the sludge treatment is difficult due to high water content. Therefore, at present, the nation has issued a plurality of policies to encourage sludge reduction, stabilization, harmlessness and reclamation. The reduction of the water content of the sludge is an effective way for reduction and is a precondition for resource utilization of the sludge, so that the sludge drying technology is widely popularized and used in China in recent years.

At present, most of sludge drying equipment adopts shaft spiral conveying to guide dried materials (sludge) into a discharging device (a dry hopper or a ton bag) from a drying room. Because the loading rate of the traditional axial screw conveying mechanism is about 30 percent at most, dry hot air with micro-positive pressure in the drying room is easy to leak to the discharging device from a gap without filling materials, which not only causes great energy waste, but also causes odor, poisonous and harmful gas, dust and the like generated in the sludge drying process to escape to the surrounding environment, and increases the inorganization discharge point position of the sludge drying equipment. On the site where the sludge drying equipment is operated, a common terminal control measure for avoiding the escape of sludge odor, dust and the like is to tighten a temporary sludge storage ton bag and a sludge discharge end as much as possible by using a rope. Go out the in-process of mud, ton bag expands along with ejection of compact mud and the hot-blast of bulging, and hot-blast dust in making ton bag rises, and in the clearance that produces when stink, dust etc. still can follow the material gap of ton bag and ton bag are changed effusion, has greatly influenced operational environment, appears when unusual in addition in mud transportation process, can't adjust or take other measures to reduce equipment damage degree fast effectively.

Disclosure of Invention

Therefore, the invention provides a sludge drying discharging device and a control method, wherein a sealing structure is arranged in front in the drying sludge conveying process, a plurality of thread-free sections are designed on a screw to form a material accumulation area, and a plurality of accumulation areas are gradually and orderly filled and compacted by materials to form a movable sealing barrier, so that the problems that in the prior art, drying hot air is easy to leak from a screw gap to a discharging device, large heat resource waste is caused, and toxic and harmful gases, dust and the like escape are solved.

In order to achieve the above object, an embodiment of the present invention provides the following:

in a first aspect of the embodiment of the invention, a sludge drying discharging device is provided, which comprises a blanking spiral shell, a conveying screw rod arranged in the blanking spiral shell, and a control system for controlling the action of the conveying screw rod, wherein the conveying screw rod comprises a threaded section for spirally conveying sludge and a non-threaded section for accumulating sludge, and the threaded section and the non-threaded section are alternately arranged and connected into a whole.

As a preferable scheme of the present invention, an observation window is disposed at a position on the discharging spiral shell, where the thread-free section is located, and a detection element for detecting sludge compactness is disposed on the observation window, and the detection element is electrically connected to the control system.

As a preferable scheme of the invention, a temporary storage barrel is connected to a feed end of the discharging spiral shell, an inlet end of the temporary storage barrel is arranged in a corrugated structure, the inlet end of the temporary storage barrel is connected to an outlet end of a sludge drying device through a quick coupling, and a switch valve is arranged between the temporary storage barrel and the feed end of the discharging spiral shell.

As a preferable scheme of the invention, a discharge opening with a plug is arranged at the bottom of the feed end of the discharging spiral shell.

As a preferable scheme of the present invention, a material level sensing element for detecting a position of sludge is disposed on an inner wall of the temporary storage barrel, sensing elements for detecting sludge are disposed at discharge ends of the discharging spiral shells, and the material level sensing element and the sensing elements are electrically connected to the control system.

As a preferable scheme of the invention, a movable mounting seat or a fixed mounting seat is connected to the outer side wall of the bottom of the discharging spiral shell.

In a second aspect of the embodiments of the present invention, there is provided a method for controlling sludge drying discharge, comprising the following steps:

step 100, closing a switch valve at the inlet end of a discharging spiral shell, and conveying dried sludge into a temporary storage barrel at the inlet end of the discharging spiral shell from a sludge drying device;

200, when detecting that the sludge level in the temporary storage barrel reaches a position between a preset highest position and a preset lowest position, opening a switch valve and starting a conveying screw by a control system;

step 300, when each non-threaded section of the conveying screw sequentially detects that the sludge compactness is within a preset value range, the control system gradually adjusts the rotating speed of the conveying screw to be reduced to a preset rotating speed value, and the sludge is gradually accumulated to the full non-threaded section and is continuously conveyed under the spiral action after being contacted with the next threaded section;

and 400, when the discharge end of the discharging spiral shell detects that the sludge is continuously discharged, the control system keeps the conveying screw rod to normally work, otherwise, the conveying process is judged to be abnormal, and the conveying screw rod and the sludge drying equipment are stopped to run.

As a preferable scheme of the invention, the discharging capacity of the sludge in the discharging spiral shell is greater than that of the sludge drying equipment, that is, the optimal matching value of the transmission rates of the conveying screw and the conveying net belt set in the sludge drying equipment is stored in the control system.

As a preferable scheme of the invention, when the sludge in the temporary storage barrel is detected to reach or be higher than the preset highest position in the running process of the conveying screw, the conveying speed of the conveying net belt group in the sludge drying equipment is correspondingly reduced until the sludge in the temporary storage barrel is reduced to below the highest position and is corrected to the optimal matching speed again; when the sludge in the temporary storage barrel is detected to reach or be lower than the preset lowest position, stopping the operation of the conveying screw until the sludge in the temporary storage barrel is higher than the lowest position and restarting the operation of the screw;

when a certain thread-free section detects that the sludge compactness does not reach a preset minimum value or a discharge port does not continuously discharge sludge, the conveying process is judged to be abnormal, the conveying of the conveying net belt set in the sludge drying equipment is stopped, the operation of the conveying screw rod is stopped, and the system prompts a fault position according to the process monitoring data of the discharging device.

As a preferable mode of the present invention, the conveying screw has a single-shaft screw structure or a double-shaft screw structure, and the screw sections and the non-screw sections on the conveying screw are alternately arranged and integrally connected.

The embodiment of the invention has the following advantages:

according to the invention, the plurality of thread-free sections are designed on the conveying screw rod in the discharging spiral shell to form the sludge accumulation area, in the operation process, the sludge can be continuously conveyed forwards only after being accumulated and filled into one accumulation area, the sludge is complementarily filled into gaps under the extrusion pressure of large and small sludge particles and is conveyed, and the sludge is sequentially filled into each accumulation area to form a movable sealed space, so that the purposes of blocking dry hot air, odor and toxic and harmful gases and preventing the dry hot air, odor and toxic and harmful gases from escaping are achieved while materials are continuously conveyed, and the working environment is effectively improved.

The control method can realize real-time monitoring of the whole conveying process of the sludge in the discharging spiral shell. When the sludge conveying is abnormal, the sludge conveying speed is flexibly adjusted or the equipment is stopped to operate according to the linkage monitoring data of the conveying process, so that the sludge can be quickly and effectively judged and maintained, and the equipment is prevented from being damaged more seriously due to abnormal conveying.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.

FIG. 1 is a schematic structural diagram of a mobile discharging device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a fixed discharging device according to an embodiment of the present invention;

FIG. 3 is a flow chart illustrating a control method according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a quick coupling according to an embodiment of the present invention.

In the figure:

51-blanking spiral shell; 52-conveying screw; 53-observation window; 54-an inductive element; 55-a quick coupling; 56-discharge opening; 57-a mobile mount; 58-fixed mount; 59-temporary bucket;

521-a threaded section; 522-no thread segment;

571-fixing the bracket; 572-a backplane; 573-universal wheel; 574-adjustable legs;

581-fixing the ground margin; 591-a level sensing element; 592-an inductive element;

551-female connector; 552-male connector; 553-stage; 554-a threaded connection section; 555-sealing ring; 556-elastic snap fastener; 557-a movable ring; 558-a seal gasket; 559-a resilient element.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

as shown in fig. 1, the invention provides a sludge drying discharging device, which comprises a discharging spiral shell 51, a conveying screw 52 arranged in the discharging spiral shell 51, and a control system for controlling the action of the conveying screw 52, wherein the conveying screw 52 comprises a threaded section 521 for spirally conveying sludge and a non-threaded section 522 for accumulating sludge, and the threaded section 521 and the non-threaded section 522 are alternately arranged and connected into a whole.

The non-threaded section 522 of the conveying screw 52 in this embodiment can be considered as a sludge accumulation area formed by removing threaded parts from several areas on the screw structure, that is, when sludge is conveyed to the sludge accumulation area, no spiral power is used to continue to push the sludge, so that more sludge particles are accumulated and the particles are supplemented and arranged until the sludge accumulation area is filled, compacted and filled, and a more compact movable sludge sealing barrier arranged in sequence is formed; when the temporary storage barrel continues to feed, materials in the sequentially arranged movable sealing barriers are extruded and released to the next thread section by a little under the pushing of the pressure of the upper-level thread section 521, and sludge particles from the upper-level thread section continue to be supplemented to form the sealing barriers, so that the dried sludge is continuously conveyed and pushed under the action of the thread power.

In the process of conveying screw 52 continuous operation, each mud is piled up the district and is all filled with mud under the extrusion, form one or several spaced removal and pile up the district's section in other words, remove the sealed barrier of mud promptly, thereby can block very big part dry hot-blast, stink and harmful gas escape to the discharge gate along the screw rod through the gap, can effectively solve among the prior art dry hot-blast can follow the screw rod space and reveal discharge apparatus, cause great heat resource waste's problem, avoid overflowing of harmful gas, environmental protection and personnel are healthy.

The blanking spiral shell 51 of the embodiment can be horizontally placed and obliquely placed, and even vertically placed for conveying materials, and the sealed conveying of sludge is not influenced.

In practical application, the discharge screw is horizontally arranged in consideration of smoothness of material conveying, and the blockage failure rate is low; from the viewpoint of moving sealing effect, the longer the vertical distance of the thread-free accumulation area, the better the moving sealing effect, such as: the blanking spiral shell 51 is arranged obliquely, the installation inclination angle is less than 60 ℃, and preferably 30-60 ℃; and the broken gear distance of the screw thread section is generally 100-300 mm for the length of the non-screw thread section, the larger the installation inclination angle is, the longer the broken gear distance is, the longer the formed sludge vertical sealing barrier distance is, and the better the mobile sealing effect is.

The power device of the conveying screw 52 is connected with the control system and operates under the control of the control system, the power device can be any electric equipment for driving the conveying screw to work, and the control system is a PLC programmable control system.

An observation window 53 is arranged at the position of the unthreaded section 522 on the blanking spiral shell 51, a detection element 54 for detecting the density of sludge is arranged on the observation window 53, the detection element 54 is electrically connected with the control system, the condition inside a sludge accumulation area can be observed through the observation window 53, and the condition of the accumulation density of sludge can be automatically detected through the detection element 54.

The detecting element 54 may be a pressure sensor disposed on the inner side wall of the discharging spiral casing 51 and located at the observation window 53, and the pressure on the inner side wall is used to determine whether the degree of compaction of the stacked objects reaches a predetermined standard, or any existing product capable of detecting the degree of compaction of the particles or powder material may be used.

The feeding end of the blanking spiral shell 51 is connected with a temporary storage barrel 59, the inlet end of the temporary storage barrel 59 is of a corrugated structure, the inlet end of the temporary storage barrel 59 is connected to the outlet end of a conveying net belt set of the sludge drying equipment through a quick connector 55, and a switch valve is arranged between the temporary storage barrel 59 and the feeding end of the blanking spiral shell 51.

The sludge in this embodiment is not directly conveyed into the feeding screw housing 51, but the heat and smell in the sludge drying apparatus are prevented from being directly transferred to the whole feeding screw housing 51 during the process of sludge accumulation in the unthreaded section 522. Connect a temporary storage bucket 59 that can save more sludge volume at the feed end, pile up the sludge of drying completion in the sludge drying equipment earlier in temporary storage bucket 59, the heat of sludge drying equipment and smell can't directly just transfer to unloading spiral shell 51 this moment in, form the preliminary barrier of separation heat and smell escape outside before the unloading spiral to provide the guarantee for the even feed of screw thread section 521 and unthreaded section 522 in the unloading spiral shell 51.

A discharge opening 56 with a plug is arranged at the bottom of the feeding end of the discharging spiral shell 51 and is used for spiral reverse discharging when the conveying process is abnormal or an accident happens.

A material level sensing element 591 used for detecting the position of the sludge is arranged on the inner wall of the temporary storage barrel 59, sensing elements 592 used for detecting the sludge are arranged at the discharge ends of the discharging spiral shells 51, and the material level sensing element 591 and the sensing elements 592 are electrically connected with the control system.

The material level sensing element 591 is provided with a temporary storage barrel 59 with the highest position and the lowest position for sensing, wherein the highest position is 100-200 mm lower than the top edge of the storage barrel, and the lowest position is 100-200 mm higher than the junction position of the storage barrel and the feeding end of the spiral shell. The sensing element 592 can be an infrared or magnetic sensing element or a weighing element, and can be configured to determine whether sludge is continuously discharged.

The outer side wall of the bottom of the blanking spiral shell 51 is connected with a movable mounting seat 57 or a fixed mounting seat 58; the movable mounting seat 57 includes a fixed bracket 571 and a universal wheel 573 disposed on a bottom plate 572 of the fixed bracket 571, and an adjustable leg 574 disposed on the bottom plate 572; the fixed mount 58 includes two fixed anchors 581 arranged in parallel.

Wherein, adjustable landing leg 574 can be for setting up the screw rod structure on bottom plate 572, adjusts to make whole discharging device steadily fixed according to different ground conditions.

The movable discharging device further comprises a quick connector 55 for connecting the discharging device with the sludge drying equipment, as shown in fig. 4, a female connector 551 connected to the outlet end of the sludge drying equipment, and a male connector 552 connected to the corrugated section of the temporary storage barrel.

A threaded connection section 554, a sealing ring 555 and an elastic buckle 556 are sequentially arranged inside the shell of the female joint 551 from top to bottom, wherein the sealing ring 555 and the elastic buckle 556 are installed by arranging an annular groove on the inner surface of the female joint shell 553, and an elastic element 559 is further arranged between the elastic buckle 556 and the annular groove.

The top end of the outer surface of the outer shell of the male connector 552 is provided with a step 553 for being clamped inside the outer shell of the female connector 551, and a movable ring 557 arranged at the bottom end of the outer shell of the male connector 552, the movable ring 557 is clamped at the bottom end edge of the outer shell of the male connector 552 and can move circumferentially and vertically, a threaded connection section 554 is also arranged on the inner surface of the outer bottom end of the male connector 552, and a sealing gasket 558 is arranged in the threaded connection section 554.

The screw coupling section 554 of the male connector 552 is screw-coupled with the inlet end of the temporary storage barrel, the packing 558 is in close contact with the edge of the temporary storage barrel, the step section 553 of the male connector 552 is pushed into the female connector 551 to press the elastic catch 556 and passes through the elastic catch 556 to the position of the sealing ring 555 to be in close contact with the sealing ring 555, and the protruding part of the lower edge of the step section 553 is restricted by the elastic catch 556 from moving. When the male connector 552 and the female connector 551 are required to be separated, the movable ring 557 is manually pushed to press the elastic catch 556 to be compressed, so that the male connector 552 is removed, and the elastic catch 556 can be reset under the action of the elastic element 559.

The elastic element 559 may be any material having elastic recovery capability.

The quick connector 55 can be used to quickly disconnect and connect devices.

Example 2:

as shown in fig. 3, the invention further provides a sludge drying discharge control method, which comprises the following steps:

step 100, closing a switch valve at the inlet end of a discharging spiral shell, and conveying dried sludge into a temporary storage barrel at the inlet end of the discharging spiral shell from a sludge drying device;

200, when detecting that the sludge level in the temporary storage barrel reaches a position between a preset highest position and a preset lowest position, opening a switch valve and starting a conveying screw by a control system;

step 300, when each non-threaded section of the conveying screw sequentially detects that the sludge compactness is within a preset value range, the control system gradually adjusts the rotating speed of the conveying screw to be reduced to a preset rotating speed value, and the sludge is gradually accumulated to the full non-threaded section and is continuously conveyed under the spiral action after being contacted with the next threaded section; when the device is started, the sludge discharging speed is first high and then low, and on the basis of achieving the preset discharging capacity of the discharging screw, the discharging speed of the discharging screw is lower, and the blockage failure rate is lower.

And 400, when the discharge end of the discharging spiral shell detects that the sludge is continuously discharged, the control system keeps the conveying screw rod to normally work, otherwise, the conveying process is judged to be abnormal, and the conveying screw rod and the sludge drying equipment are stopped to run.

The discharging capacity of the sludge in the discharging spiral shell is larger than that of the sludge drying equipment, namely the optimal matching value of the transmission speed of the conveying screw and the conveying net belt set in the sludge drying equipment is stored in the control system.

When the conveying screw rod runs and detects that the sludge in the temporary storage barrel reaches or is higher than a preset highest position, the transmission speed of the conveying net belt group in the sludge drying equipment is correspondingly reduced until the sludge in the temporary storage barrel is reduced to be below the highest position and is corrected to be an optimal matching speed again, and therefore the problem that the temporary storage barrel is blocked due to the fact that the sludge overflows when the control system adjusts the sludge is avoided.

When detecting that mud reaches or is less than predetermined extreme position in the temporary storage bucket, stop the operation of conveying screw rod, until mud is higher than extreme position screw rod restart operation in the temporary storage bucket to avoid in the temporary storage bucket not enough mud, influence follow-up screw conveying does not have screw thread section and the even cloth of screw thread section, make the material barrier destruction of separation heat and smell escape outward.

When a certain thread-free section detects that the sludge compactness does not reach a preset minimum value or a discharge port does not continuously discharge sludge, or detects that the running current of a conveying screw exceeds a rated current, judging that the conveying process is abnormal, stopping the transmission of a conveying net belt set in the sludge drying equipment, and stopping the operation of a conveying screw; the system prompts fault positions according to the process monitoring data of the discharging device, such as the problems of blockage of a certain thread section or local blockage of the thread section, faults of a screw conveying machine, feeding faults of a sludge drying device and the like.

The method can monitor the whole conveying process of the sludge in the discharging spiral shell, and when the sludge is conveyed abnormally, the sludge conveying speed is flexibly adjusted or the equipment is stopped to operate according to the conveying process linkage monitoring data, so that the rapid and effective judgment and maintenance can be ensured, and the problems that the equipment is seriously damaged or the movable sealing barrier in the conveying process is damaged due to the conveying abnormality and the like can be avoided. The conveying screw rod is of a single-shaft spiral structure or a double-shaft spiral structure, and the thread sections and the thread-free sections on the conveying screw rod are alternately arranged and connected into a whole.

The object treated by the invention is not limited to sludge generated by solid-liquid separation in the water removal treatment process, including but not limited to municipal sewage sludge, industrial wastewater sludge, waterworks sludge, ceramic waste slurry generated by ceramic production process precipitation and the like, and is also suitable for other powdery or granular water-containing materials needing drying.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. The utility model provides a sludge drying discharging device, its characterized in that includes unloading spiral shell (51), sets up conveying screw (52) in unloading spiral shell (51), and be used for controlling the control system of conveying screw (52) action, conveying screw (52) are including screw thread section (521) that are used for the screw feed mud and no screw thread section (522) that are used for piling up mud, screw thread section (521) with no screw thread section (522) set up in turn and connect the shaping as an organic whole.

2. The sludge drying discharging device according to claim 1, wherein an observation window (53) is arranged on the discharging spiral shell (51) at the position of the unthreaded section (522), a detection element (54) for detecting sludge compactness is arranged on the observation window (53), and the detection element (54) is electrically connected with the control system.

3. The sludge drying discharging device according to claim 1, wherein a temporary storage barrel (59) is connected to the feeding end of the discharging spiral shell (51), the inlet end of the temporary storage barrel (59) is arranged to be of a corrugated structure, the inlet end of the temporary storage barrel (59) is connected to the outlet end of the sludge drying equipment through a quick coupling (55), and a switch valve is arranged between the temporary storage barrel (59) and the feeding end of the discharging spiral shell (51).

4. The sludge drying discharging device as claimed in claim 1, wherein a discharging opening (56) with a plug is arranged at the bottom of the feeding end of the discharging spiral shell (51).

5. The sludge drying discharging device and the control method thereof as claimed in claim 1, wherein a level sensing element (591) for detecting the position of the sludge is arranged on the inner wall of the temporary storage barrel (59), a sensing element (592) for detecting the sludge is arranged on the discharging end of the discharging spiral shell (51), and the level sensing element (591) and the sensing element (592) are electrically connected with the control system.

6. The sludge drying discharging device according to claim 1, wherein a movable mounting seat (57) or a fixed mounting seat (58) is connected to the outer side wall of the bottom of the discharging spiral shell (51).

7. A sludge drying discharging control method based on the discharging device of any one of claims 1 to 6, characterized by comprising the following steps:

step 100, closing a switch valve at the inlet end of a discharging spiral shell, and conveying dried sludge into a temporary storage barrel at the inlet end of the discharging spiral shell from a sludge drying device;

200, when detecting that the sludge level in the temporary storage barrel reaches a position between a preset highest position and a preset lowest position, opening a switch valve and starting a conveying screw by a control system;

step 300, when each non-threaded section of the conveying screw sequentially detects that the sludge compactness is within a preset value range, the control system gradually adjusts the rotating speed of the conveying screw to be reduced to a preset rotating speed value, and the sludge is gradually accumulated to the full non-threaded section and is continuously conveyed under the spiral action after being contacted with the next threaded section;

and 400, when the discharge end of the discharging spiral shell detects that the sludge is continuously discharged, the control system keeps the conveying screw rod to normally work, otherwise, the conveying process is judged to be abnormal, and the conveying screw rod and the sludge drying equipment are stopped to run.

8. The sludge drying discharging control method according to claim 7, wherein the discharging capacity of the sludge in the discharging spiral shell is larger than that of the sludge drying device, that is, an optimal matching value of the transmission speed of the conveying screw and the conveying mesh belt set in the sludge drying device is stored in the control system.

9. The method for controlling sludge drying discharging according to claim 7, wherein when the sludge in the temporary storage barrel is detected to reach or be higher than the preset highest position in the running process of the conveying screw, the conveying speed of the conveying net belt group in the sludge drying device is correspondingly reduced until the sludge in the temporary storage barrel is reduced below the highest position to be corrected to the optimal matching speed again; when the sludge in the temporary storage barrel is detected to reach or be lower than the preset lowest position, stopping the operation of the conveying screw until the sludge in the temporary storage barrel is higher than the lowest position and restarting the operation of the screw;

when a certain thread-free section detects that the sludge compactness does not reach a preset minimum value or a discharge port does not continuously discharge sludge, the conveying process is judged to be abnormal, the conveying of the conveying net belt set in the sludge drying equipment is stopped, the operation of the conveying screw rod is stopped, and the system prompts a fault position according to the process monitoring data of the discharging device.

10. The method for controlling sludge drying discharging according to claim 9, wherein the conveying screw is of a single-shaft screw structure or a double-shaft screw structure, and the screw sections and the non-screw sections on the conveying screw are alternately arranged and integrally connected.

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