Sludge mixing, dosing and treatment system

Abstract

The application discloses a sludge mixing, feeding and treating system, which can realize the adjustment of the moisture content of the sludge incinerator feed by adjusting the proportion of the added raw materials, and has the functions of crushing and stirring, so that the uniformity of the sludge incinerator feed can be fully ensured, the problems of large temperature fluctuation in the furnace and coking in the furnace can be greatly reduced or even avoided, and the incineration efficiency and effect can be ensured. The main structure of the application comprises a dry sludge storage tank, a wet sludge storage tank, a sludge premixing conveying device, a homogenizing mixing device and a sludge incinerator, the dry sludge storage tank is internally provided with dry sludge stirring paddles, the wet sludge storage tank is internally provided with wet sludge stirring paddles, the sludge premixing conveying device comprises a sludge conveying belt, a distribution pipe and a furrow plough, the distribution pipe is provided with a plurality of feeding nozzles, the homogenizing mixing device comprises a mixing outer cylinder and a mixing stirring shaft, the mixing stirring shaft is provided with mixing conveying spiral auger blades, a primary crushing fork, a secondary crushing fork and a tertiary crushing fork.

Description

Technical Field

[0001] This invention belongs to the field of sludge treatment technology, and in particular relates to a sludge mixing, feeding and treatment system. Background Technology

[0002] Sludge contains a large amount of organic matter, pathogens, heavy metals, etc. If not handled properly (such as simple landfill), it will cause serious secondary pollution (soil and groundwater pollution). Incineration is one of the most thorough and rapid ways to treat sludge. Through incineration, the volume of sludge can be reduced, stabilized and rendered harmless, and energy can potentially be recovered.

[0003] Sludge incinerators are existing technology and are common equipment used for incinerating sludge. Sludge incinerators have requirements regarding the moisture content of the feed (sludge entering the incinerator). In other words, the proportion of wet sludge co-firing is limited. For example, sludge with a moisture content of 60%-80% should typically be co-fired at less than 5%. If the co-firing ratio deviates from the normal range, it can easily lead to low incineration efficiency and poor incineration effect. Furthermore, the uniformity of the feed to the sludge incinerator is also required. Poor feed uniformity (significant liquid-liquid separation, excessive solid agglomeration, etc.) can easily cause large temperature fluctuations and coking within the furnace.

[0004] Therefore, reasonably improving the uniformity of the feed to the sludge incinerator and reasonably controlling the moisture content of the feed are key to ensuring high efficiency and good results in sludge incineration. Theoretically, mixing dry and wet sludge together and adjusting their ratio can regulate the final feed moisture content. However, how to quickly and effectively mix the vastly different dry and wet sludge to avoid clumping in the final feed, prevent large temperature fluctuations in the furnace, prevent coking, and ensure stable incineration remains a challenge. Summary of the Invention

[0005] This invention provides a sludge mixing, feeding, and treatment system that divides the raw materials into two types: dry sludge and wet sludge. The moisture content of the feed to the sludge incinerator can be adjusted by changing the proportion of the added raw materials. It is highly adaptable and has a multi-stage premixing function, which can fully premix the dry and wet sludge. In addition, it also has a crushing and stirring function, which can fully ensure the uniformity of the feed to the sludge incinerator. It can greatly reduce or even avoid problems such as large temperature fluctuations and coking in the furnace, and ensure incineration efficiency and incineration effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sludge mixing, feeding, and treatment system, comprising:

[0008] A dry sludge storage tank is provided with several dry sludge agitating blades driven by a dry sludge agitating motor. A dry sludge discharge port is provided at the bottom of the dry sludge storage tank, and a dry sludge discharge valve is provided on the dry sludge discharge port.

[0009] A wet sludge storage tank is provided with several wet sludge agitating blades driven by a wet sludge agitating motor. A wet sludge discharge port is provided at the bottom of the wet sludge storage tank, and a wet sludge discharge valve is provided on the wet sludge discharge port.

[0010] A sludge premixing and conveying device, comprising a sludge conveying belt located below the dry sludge outlet, a wet sludge conveying structure for conveying wet sludge supplied from the wet sludge outlet to the sludge conveying belt, and a front screw feeder, wherein the feed end of the front screw feeder is provided with a front feed hopper for receiving sludge on the sludge conveying belt.

[0011] A homogenizing mixing device includes a horizontally placed mixing outer cylinder and a mixing and stirring shaft located inside the mixing outer cylinder and driven by a mixing and stirring motor. The upper part of one end of the mixing outer cylinder is provided with an outer cylinder inlet that connects to the discharge end of the front screw conveyor, and the lower part of the other end of the mixing outer cylinder is provided with an outer cylinder discharge outlet. The mixing and stirring shaft is provided with mixing and conveying auger blades, at least one primary crushing fork, at least one secondary crushing fork, and at least one tertiary crushing fork. The outer cylinder inlet, any one primary crushing fork, any one secondary crushing fork, and any one tertiary crushing fork are arranged sequentially along the axial direction of the mixing and stirring shaft.

[0012] The sludge incinerator has its outer cylinder outlet connected to the sludge incinerator's inlet via a conveying pipeline.

[0013] Preferably, the sludge premixing and conveying device further includes a pressure roller frame, an embedded distribution frame, and a lifting machine for driving the embedded distribution frame to rise and fall. The pressure roller frame is equipped with an automatic pressure roller that is rotatably connected to the pressure roller frame and located above the sludge conveying belt. The embedded distribution frame is equipped with a distribution pipe supplied by the wet sludge conveying structure and several trenching plows for trenching the dry sludge layer on the sludge conveying belt. The distribution pipe is equipped with several injection nozzles that correspond one-to-one with the trenching plows and are used to inject wet sludge into the trenches dug by the corresponding trenching plows. The inlet end of the injection nozzle is connected to the distribution pipe, and the injection nozzle is equipped with an injection outlet valve. The dry sludge outlet, any trenching plow, any injection nozzle, and the automatic pressure roller are arranged sequentially along the conveying direction of the sludge conveying belt.

[0014] Preferably, the wet sludge conveying structure includes a wet sludge screw feeder, the discharge end of which is the discharge end of the wet sludge conveying structure, and the discharge end of the wet sludge screw feeder is connected to the distribution pipe through a wet sludge conveying hose.

[0015] Preferably, the primary crushing fork includes a primary inner fork frame disposed on the mixing shaft, a primary outer fork frame disposed on the primary inner fork frame, a plurality of primary inner fork rods disposed on the primary inner fork frame, and a plurality of primary outer fork rods disposed on the primary outer fork frame. In a primary crushing fork: the distance between any two adjacent primary inner fork rods is L, and the distance between any two adjacent primary outer fork rods is L.

[0016] The secondary breaker fork includes a secondary inner fork frame mounted on the mixing shaft, a secondary outer fork frame mounted on the secondary inner fork frame, several secondary inner fork rods mounted on the secondary inner fork frame, and several secondary outer fork rods mounted on the secondary outer fork frame. In a secondary breaker fork: the distance between any two adjacent secondary inner fork rods is M, and the distance between any two adjacent secondary outer fork rods is M.

[0017] The three-stage breaker fork includes a three-stage inner fork frame mounted on the mixing shaft, a three-stage outer fork frame mounted on the three-stage inner fork frame, a number of three-stage inner fork rods mounted on the three-stage inner fork frame, and a number of three-stage outer fork rods mounted on the three-stage outer fork frame. In a three-stage breaker fork: the distance between any two adjacent three-stage inner fork rods is N, and the distance between any two adjacent three-stage outer fork rods is N.

[0018] L > M > N.

[0019] Preferably, the mixing outer cylinder is provided with an inflatable airbag layer structure covering the inner circumferential sidewall of the mixing outer cylinder. The inflatable airbag layer structure includes at least one airbag body, and the airbag body is provided with a deflation pipe and an inflation pipe. The deflation pipe is provided with a deflation solenoid valve, and the inflation pipe is connected to a high-pressure air source. The inflation pipe is provided with an inflation solenoid valve.

[0020] Preferably, the inflatable airbag layer structure includes two airbags, one of which is located above the other. The airbag at the top is defined as the upper semicircular airbag, and the other airbag is defined as the lower semicircular airbag. It also includes several active variable-bottom structures. The primary, secondary, and tertiary breaker forks are all defined as breaker structures. Each breaker structure corresponds one-to-one with an active variable-bottom structure. In the corresponding breaker structure and active variable-bottom structure: the active variable-bottom structure includes a U-shaped stainless steel spring for impacting the breaker structure and two compression plates for compressing the outer surfaces at both ends of the U-shaped stainless steel spring. The airbag has a U-shaped stainless steel spring with its opening facing upwards. The outer side of the U-shaped stainless steel spring consists of two symmetrically arranged top outer sides and a U-shaped outer side. The top outer side, the U-shaped outer side, and the other top outer side are arranged sequentially and continuously. The compression airbag is located on the lower semi-circular airbag. One top outer side is attached and fixed to one compression airbag, and the other top outer side is attached and fixed to another compression airbag. The U-shaped outer side is attached and fixed to the lower semi-circular airbag. The compression airbag is equipped with an exhaust pipe and an air inlet pipe. The exhaust pipe is equipped with an exhaust solenoid valve, and the air inlet pipe is connected to a high-pressure air source. The air inlet pipe is equipped with an air inlet solenoid valve.

[0021] Preferably, the conveying pipeline includes a discharge horizontal pipe, a discharge vertical pipe with a closed lower end, a plunger pump, and a horizontally arranged pressurized conveying pipe. The outer cylinder discharge port, the upper end of the discharge horizontal pipe and the discharge vertical pipe are connected in sequence. The working chamber of the plunger pump is connected to the discharge vertical pipe. One end of the pressurized conveying pipe is connected to the discharge vertical pipe, and the other end of the pressurized conveying pipe is connected to the sludge incinerator through the incinerator feed pipe. The working chamber of the plunger pump, the discharge vertical pipe and the pressurized conveying pipe are arranged in sequence along the length of the pressurized conveying pipe.

[0022] Preferably, the pressurized conveying pipe is equipped with a crushing filter plate with multiple crushing filter holes. The conveying pipeline also includes a first high-pressure air pipe and a second high-pressure air pipe supplied by a high-pressure air source. The first high-pressure air pipe is connected to the pressurized conveying pipe through a front branch pipe and a rear branch pipe. A first solenoid valve is installed on the first high-pressure air pipe. The mixing outer cylinder has an outer cylinder return port located above the outer cylinder outlet. The pressurized conveying pipe is connected to the outer cylinder return port through a return pipe. The discharge vertical pipe, the front branch pipe, and the pressurized conveying pipe are connected... The connection points of the discharge vertical pipe, the crushed filter plate, and the rear branch pipe with the pressurized conveying pipe are arranged sequentially along the length of the pressurized conveying pipe. The connection points of the discharge vertical pipe, the return pipe, and the pressurized conveying pipe, as well as the crushed filter plate, are arranged sequentially along the length of the pressurized conveying pipe. The connection point of the front branch pipe with the pressurized conveying pipe is located below the connection point of the return pipe and the pressurized conveying pipe. The second high-pressure gas pipe is connected to the incinerator feed pipe. A second solenoid valve is installed on the second high-pressure gas pipe. The inlet of the sludge incinerator, the connection point of the second high-pressure gas pipe with the incinerator feed pipe, and the feed inlet of the sludge incinerator are arranged sequentially along the gas supply direction of the second high-pressure gas pipe.

[0023] Preferably, the system also includes a control unit, a dry sludge moisture content detector electrically connected to the control unit at the dry sludge discharge port, a wet sludge moisture content detector electrically connected to the control unit at the wet sludge discharge port, and an outer cylinder discharge sludge moisture content detector electrically connected to the control unit at the outer cylinder discharge port. The sludge incinerator includes an incinerator DCS, and the incinerator DCS includes an incinerator temperature detector electrically connected to the control unit.

[0024] Preferably, the incinerator DCS includes an in-furnace pressure detector, which is electrically connected to the control host. Both the dry sludge discharge valve and the wet sludge discharge valve are electrically controlled regulating valves. The dry sludge discharge valve, the wet sludge discharge valve, and the front screw feeder are all electrically connected to the control host.

[0025] The beneficial effects of this invention are as follows: The raw materials are divided into dry sludge and wet sludge. The moisture content of the feed to the sludge incinerator can be adjusted by changing the proportion of the added raw materials, making it highly adaptable. It has a multi-stage premixing function, which can fully premix the dry and wet sludge. Furthermore, it has a crushing and stirring function, which can fully ensure the uniformity of the feed to the sludge incinerator, greatly reducing or even avoiding problems such as large temperature fluctuations and coking inside the furnace, thus ensuring incineration efficiency and effect. The invention employs a premixing method that combines dry and wet sludge, fundamentally changing the simple layering contact mode of dry and wet materials. This allows the wet sludge to be effectively supported and encapsulated by the dry sludge, preventing overflow and turbulence of the wet sludge. This significantly increases the contact area between the two materials, creating extremely favorable initial conditions for rapid and uniform mixing in the homogenizing device. By periodically inflating and deflating the airbag, it expands and contracts, shaking off the sludge adhering to the upper part of the circumferential inner wall. The U-shaped stainless steel spring can bounce off the crushing structure, generating strong vibrations that can shake off the sludge caked on the crushing structure, achieving self-cleaning of the crushing structure. At the same time, its reaction force further enhances the "splashing" effect of the spring on the sludge. This synergistic effect of "bottom disturbance + structural impact" completely solves the problem of retention and clumping in the bottom dead zone, significantly improving the overall mixing uniformity of the sludge. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the dry sludge storage tank and the wet sludge storage tank of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the sludge conveyor belt of the present invention;

[0029] Figure 4 yes Figure 3 A schematic diagram of the structure after removing some of the components;

[0030] Figure 5 This is a schematic diagram of the structure of the embedded distribution frame of the present invention;

[0031] Figure 6 This is a partial structural schematic diagram of the present invention;

[0032] Figure 7 This is a partial structural diagram of the mixing outer cylinder of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the mixing outer cylinder of the present invention;

[0034] Figure 9 This is a schematic diagram of the structure of the hybrid conveying spiral auger blade of the present invention;

[0035] Figure 10 This is a schematic diagram of the structure of the plunger pump and sludge incinerator of the present invention;

[0036] Figure 11 This is a schematic diagram of the structure of the crushed filter plate in this invention.

[0037] Figure reference numerals: 1. Dry sludge storage tank; 11. Dry sludge agitator; 12. Dry sludge outlet; 12. Dry sludge moisture content detector; 12.1. Wet sludge storage tank; 2. Wet sludge agitator; 21. Wet sludge outlet; 22. Wet sludge moisture content detector; 22.1. Wet sludge screw feeder; 23. Wet sludge conveying hose; 24. Sludge conveyor belt; 3. Front screw feeder; 4. Front feed hopper; 41. Mixing and stirring motor; 5. Mixing... Outer cylinder 501, outer cylinder inlet 501a, outer cylinder outlet 501b, granulation crushing filter 501.1, discharge sludge moisture content detector 501.2, outer cylinder return inlet 501c, mixing and stirring shaft 502, mixing and conveying auger blades 503, primary inner fork 504, primary inner fork rod 504.1, primary outer fork 505, primary outer fork rod 505.1, secondary inner fork 506, secondary inner... Fork lever 506.1, secondary outer fork frame 507, secondary outer fork lever 507.1, tertiary inner fork frame 508, tertiary inner fork lever 508.1, tertiary outer fork frame 509, tertiary outer fork lever 509.1, sludge incinerator 6, pressure roller frame 601, embedded distribution frame 602, elevator 603, automatic pressure roller 604, crushing filter plate 604.1, crushing filter hole 604.1a, distribution pipe 605, furrowing plow 606. Injection nozzle 607, upper semi-circular airbag 701, lower semi-circular airbag 702, U-shaped stainless steel spring 703, extrusion airbag 704, discharge horizontal pipe 801, discharge vertical pipe 802, plunger pump 803, pressurized conveying pipe 804, incinerator feed pipe 804.1, first high-pressure air pipe 805, front branch pipe 805.1, rear branch pipe 805.2, second high-pressure air pipe 806, return pipe 807, control host 9. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8, Figure 9 , Figure 10 , Figure 11 As shown,

[0040] A sludge mixing, feeding, and treatment system, comprising:

[0041] A dry sludge storage tank 1 is provided with several dry sludge stirring blades 11 driven by a dry sludge stirring motor. A dry sludge discharge port 12 is provided at the bottom of the dry sludge storage tank 1, and a dry sludge discharge valve is provided on the dry sludge discharge port 12.

[0042] A wet sludge storage tank 2 is provided with several wet sludge agitating blades 21 driven by a wet sludge agitating motor. A wet sludge discharge port 22 is provided at the bottom of the wet sludge storage tank 2, and a wet sludge discharge valve is provided on the wet sludge discharge port 22.

[0043] The sludge premixing and conveying device includes a sludge conveyor belt 3 located below the dry sludge outlet 12, a wet sludge conveying structure for conveying wet sludge supplied from the wet sludge outlet 22 to the sludge conveyor belt, and a front screw feeder 4. The feed end of the front screw feeder is provided with a front feed hopper 41 for receiving sludge on the sludge conveyor belt.

[0044] A homogenizing mixing device includes a horizontally placed mixing outer cylinder 501 and a mixing and stirring shaft 502 located inside the mixing outer cylinder 501 and driven by a mixing and stirring motor 5. The mixing outer cylinder 501 has an outer cylinder inlet 501a at the upper part of one end, which is connected to the discharge end of the front screw feeder 4. The mixing outer cylinder 501 has an outer cylinder outlet 501b at the lower part of the other end. The mixing and stirring shaft 502 is provided with mixing and conveying auger blades 503, at least one primary crushing fork, at least one secondary crushing fork, and at least one tertiary crushing fork. The outer cylinder inlet 501a, any one primary crushing fork, any one secondary crushing fork, and any one tertiary crushing fork are arranged sequentially along the axial direction of the mixing and stirring shaft 502.

[0045] The sludge incinerator 6 has an outer cylinder outlet 501b connected to the inlet of the sludge incinerator 6 via a conveying pipeline.

[0046] Note: Dry sludge does not mean that the moisture content is 0; it simply means that the moisture content is much lower than that of wet sludge. The specific value can be set according to the requirements.

[0047] The dry sludge discharge valve and the wet sludge discharge valve can be conventional valves such as electrically controlled regulating valves, as long as they can achieve the functions of opening and closing and adjusting the opening degree. When it is necessary to increase the moisture content of the feed, the feed rate of the wet sludge storage tank per unit time can be increased / decreased. When it is necessary to decrease the moisture content of the feed, the feed rate of the dry sludge storage tank per unit time can be increased / decreased.

[0048] Before feeding, the dry sludge agitator 11 continuously agitates the dry sludge in the dry sludge storage tank 1, and the wet sludge agitator 21 continuously agitates the wet sludge in the wet sludge storage tank 2. This effectively breaks up the solid-liquid stratification caused by prolonged standing of the dry and wet sludge, ensuring the uniformity of the sludge raw materials. Furthermore, by opening, closing, and adjusting the dry sludge discharge valve and the wet sludge discharge valve, the dry and wet sludge can be output in a controllable manner, providing a basis for accurate subsequent proportioning.

[0049] The sludge conveyor belt 3 converges the dry and wet material flows (sludge) onto the same conveying platform, "pre-positioning" the wet sludge on top of the dry sludge, thus enabling the dry sludge to carry the wet sludge to the feed end of the front feed hopper 41 and the front screw feeder 4. Inside the front screw feeder 4, the sludge is compressed and conveyed, and then enters the homogenizing and mixing device. Inside the homogenizing and mixing device (inside the mixing outer cylinder 501), the sludge moves axially under the push of the mixing and conveying screw auger blades 503, and simultaneously passes through different multi-stage crushing forks, undergoing a complex process of conveying, mixing, and progressive crushing. At the same time, through this integrated design of "conveyor + progressive crushing", the sludge is highly homogenized within the limited cylinder space and time, effectively eliminating large and small clumps, and providing a highly uniform feed for sludge incineration.

[0050] If dry and wet sludge are almost completely separated and only enter the homogenizing mixing device (mixing outer cylinder 501) together, achieving a high degree of homogenization of the sludge within the limited cylinder space and time is still challenging. In this solution, through primary premixing on the sludge conveyor belt 3 and secondary premixing in the front screw feeder 4, the sludge is compressed and conveyed, thus giving the sludge entering the homogenizing mixing device a certain degree of premixing effect. Furthermore, wet sludge has high fluidity and is prone to overflow and turbulence, easily spilling out of the sludge conveyor belt 3. Therefore, "pre-setting" the wet sludge on top of the dry sludge can also reduce this situation.

[0051] A granular crushing filter screen 501.1 is installed at the feed inlet 501a of the outer cylinder. After the sludge passes through the granular crushing filter screen 501.1, it can achieve preliminary crushing.

[0052] The sludge premixing and conveying device also includes a pressure roller frame 601, an embedded distribution frame 602, and a lifting machine 603 for driving the embedded distribution frame 602 to rise and fall. The pressure roller frame 601 is provided with an automatic pressure roller 604 that is rotatably connected to the pressure roller frame 601 and located above the sludge conveying belt 3. The embedded distribution frame 602 is provided with a distribution pipe 605 that is supplied by the wet sludge conveying structure and a number of trenching plows 606 for trenching the dry sludge layer on the sludge conveying belt 3. The distribution pipe 605 is provided with a number of injection nozzles 607 that correspond one-to-one with the trenching plows 606 and are used to inject wet sludge into the trenches dug by the corresponding trenching plows 606. The inlet end of the injection nozzle 607 is connected to the distribution pipe 605. The injection nozzle 607 is provided with an injection outlet valve. The dry sludge outlet 12, any trenching plow 606, any injection nozzle 607, and the automatic pressure roller 604 are arranged sequentially along the conveying direction of the sludge conveying belt 3.

[0053] The wet sludge conveying structure includes a wet sludge screw feeder 23. The discharge end of the wet sludge screw feeder 23 is the discharge end of the wet sludge conveying structure. The discharge end of the wet sludge screw feeder 23 is connected to the distribution pipe 605 through a wet sludge conveying hose 24.

[0054] As mentioned earlier, wet sludge has high fluidity and is prone to overflow and turbulence, which can easily cause it to spill out of the sludge conveyor belt 3. Therefore, "pre-setting" wet sludge on dry sludge can reduce this situation. However, if only this pre-mixing method of spreading wet sludge on dry sludge is used, the proportion of wet sludge on the sludge conveyor belt 3 is still relatively limited (there cannot be too much wet sludge, otherwise it will still overflow and turbulence).

[0055] In this scheme, dry sludge is first laid flat on the sludge conveyor belt 3, and a trenching plow 606 plows out regular grooves on it. Wet sludge is precisely injected into the grooves by the injection nozzle 607. Subsequently, an automatic pressure roller 604 pushes the dry sludge on both sides of the grooves to cover it, forming a "dry-wrapped-wet" interlocking body. At the same time, this mechanical interlocking premixing method fundamentally changes the simple layering contact mode of dry and wet materials, allowing the wet sludge to be effectively carried and wrapped by the dry sludge. This not only prevents the wet sludge from overflowing and flowing, but also greatly increases the contact area between the two materials, creating extremely favorable initial conditions for rapid and uniform mixing in the subsequent homogenizing mixing device. This method also increases the upper limit of the proportion of wet sludge that can be on the sludge conveyor belt 3. In addition, the connection of the wet sludge conveying hose 24 enables a flexible and reliable connection between the wet sludge conveying pipeline and the liftable embedded distribution frame 602, ensuring the continuity of wet sludge supply during lifting and adjustment.

[0056] The lifting platform 603 drives the embedded distribution frame 602 and the trenching plow 606 to rise and fall, which can adjust the depth of the trenches dug on the dry sludge layer laid on the sludge conveyor belt 3, so as to better adapt to different wet sludge ratios.

[0057] The screw blades of the front screw feeder 4 are designed with a variable pitch that decreases continuously or in segments from the feed end to the discharge end along the material conveying direction. The ratio of the starting screw pitch S1 at the feed end to the ending screw pitch S2 at the discharge end ranges from 2.5:1 to 4:1.

[0058] Through the transition structure from large pitch to small pitch, rapid material conveying and initial compression are achieved in the feeding section, stable conveying and compression mixing are achieved in the intermediate section, and a region with a "plug flow" effect is formed in the discharge section, thereby achieving higher precision material conveying. Simultaneously, the progressive compression of the dry and wet sludge interlocking structure during conveying largely maintains the relative position of the wet sludge within the trench, preventing overall migration. This creates extremely favorable initial conditions for rapid and uniform mixing of the sludge in the subsequent homogenizing mixing device, improving the uniformity of the final feed to the sludge incinerator 6.

[0059] Explanation: "Plugging flow," also known as "thrust flow" or "plug flow," is scientifically called "piston flow." It is an idealized flow model whose core characteristic is that in thrust flow, the fluid moves forward like a piston, fluid particles advance sequentially along the flow direction, there is no mixing, and all fluid particles have the same residence time from inlet to outlet.

[0060] The primary breaker fork includes a primary inner fork frame 504 mounted on the mixing shaft 502, a primary outer fork frame 505 mounted on the primary inner fork frame 504, a plurality of primary inner fork rods 504.1 mounted on the primary inner fork frame 504, and a plurality of primary outer fork rods 505.1 mounted on the primary outer fork frame 505. In a primary breaker fork: the distance between any two adjacent primary inner fork rods 504.1 is L, and the distance between any two adjacent primary outer fork rods 505.1 is L.

[0061] The secondary breaker fork includes a secondary inner fork frame 506 mounted on the mixing shaft 502, a secondary outer fork frame 507 mounted on the secondary inner fork frame 506, a plurality of secondary inner fork rods 506.1 mounted on the secondary inner fork frame 506, and a plurality of secondary outer fork rods 507.1 mounted on the secondary outer fork frame 507. In a secondary breaker fork: the distance between any two adjacent secondary inner fork rods 506.1 is M, and the distance between any two adjacent secondary outer fork rods 507.1 is M.

[0062] The three-stage breaker fork includes a three-stage inner fork frame 508 mounted on the mixing shaft 502, a three-stage outer fork frame 509 mounted on the three-stage inner fork frame 508, a plurality of three-stage inner fork rods 508.1 mounted on the three-stage inner fork frame 508, and a plurality of three-stage outer fork rods 509.1 mounted on the three-stage outer fork frame 509. In a three-stage breaker fork: the distance between any two adjacent three-stage inner fork rods 508.1 is N, and the distance between any two adjacent three-stage outer fork rods 509.1 is N.

[0063] L > M > N.

[0064] In the above structure, during the sludge conveying process, the sludge first passes through a primary crushing fork with a relatively large fork spacing, breaking up larger clumps and performing initial mixing within the drum. It then passes through a secondary crushing fork with a smaller fork spacing, further crushing and dispersing smaller clumps. Finally, it passes through a tertiary crushing fork with the smallest fork spacing, further refining, dispersing, and mixing even smaller clumps and particles. This gradient spacing design ensures that the crushing and mixing process follows the principle of "coarse first, then fine," avoiding the energy surge or equipment jamming that can occur when using excessively dense crushing forks in the initial material state, thus achieving a superior crushing and mixing effect. Furthermore, the crushing structure can be mounted on the mixing shaft via a rotating joint, allowing it to rotate around the bottom joint to shear, crush, and fold the material. The shape of the crushing structure can also be changed according to requirements, as long as the crushing function is achieved.

[0065] The mixing outer cylinder 501 is provided with an inflatable airbag layer structure covering the inner circumferential sidewall of the mixing outer cylinder 501. The inflatable airbag layer structure includes at least one airbag body, and the airbag body is provided with a deflation pipe and an inflation pipe. The deflation pipe is provided with a deflation solenoid valve, and the inflation pipe is connected to a high-pressure air source. The inflation pipe is provided with an inflation solenoid valve.

[0066] The sludge inside the mixing outer cylinder 501 is conveyed by the mixing and conveying auger blades 503. "Using auger blades for material conveying" is existing technology, characterized by a material filling rate (i.e., the percentage of material volume to the auger space volume) typically below 0.45 (the specific percentage depends on the material characteristics, the overall machine inclination angle, and the conveying purpose, etc.). Inside the mixing outer cylinder 501, the upper part is usually relatively empty (except for the area near the outer cylinder inlet 501a), while the lower part is relatively full. Therefore, sludge clumps easily form on the upper part of the circumferential inner wall of the mixing outer cylinder 501. Furthermore, the sludge and clumps at the bottom of the mixing outer cylinder 501 cannot contact the crushing structure and are more likely to lag behind the overall sludge flow, making them less likely to be pushed towards the outer cylinder outlet 501b by the mixing and conveying auger blades 503. This is detrimental to the overall mixing of the sludge.

[0067] In this design, the inner circumferential wall of the mixing outer cylinder 501 is transformed into an inflatable airbag layer structure (the mixing outer cylinder 501 is equipped with an inflatable airbag layer structure covering the inner circumferential wall of the mixing outer cylinder 501). By periodically inflating and deflating the airbags, they expand and contract, thereby shaking and dislodging the sludge adhering to the upper part of the inner circumferential wall, and also stirring the sludge in the relatively lower part to a certain extent, thereby improving the sludge mixing effect in the mixing outer cylinder 501.

[0068] The inflatable airbag layer structure includes two airbags, one of which is located above the other. The airbag at the top is defined as the upper semi-circular airbag 701, and the other airbag is defined as the lower semi-circular airbag 702. It also includes several active variable-bottom structures. The primary, secondary, and tertiary breaker forks are all defined as breaker structures. Each breaker structure corresponds one-to-one with an active variable-bottom structure. In the corresponding breaker structure and active variable-bottom structure: the active variable-bottom structure includes a U-shaped stainless steel spring 703 for impacting the breaker structure and two compression airbags 704 for compressing the outer surfaces of both ends of the U-shaped stainless steel spring 703. The steel spring 703 has its opening facing upwards. The outer side of the U-shaped stainless steel spring 703 consists of two symmetrically arranged top outer sides and a U-shaped outer side. The top outer side, the U-shaped outer side, and the other top outer side are arranged sequentially. The compression airbag 704 is located on the lower semi-circular airbag 702. One top outer side is attached to and fixed to one compression airbag 704, and the other top outer side is attached to and fixed to another compression airbag 704. The U-shaped outer side is attached to and fixed to the lower semi-circular airbag 702. The compression airbag 704 is equipped with an exhaust pipe and an air inlet pipe. The exhaust pipe is equipped with an exhaust solenoid valve, and the air inlet pipe is connected to a high-pressure air source. The air inlet pipe is equipped with an air inlet solenoid valve.

[0069] The breakable structure should not and should not always be in contact with the inner circumferential wall of the mixing outer cylinder 501; otherwise, it will lead to rapid wear of the breakable structure and the inner circumferential wall of the mixing outer cylinder 501, and will increase unnecessary energy consumption. As for the inflatable airbag layer, it should not be in contact with the breakable structure at all, otherwise it will be easily damaged. Furthermore, as mentioned earlier, periodically inflating and deflating the airbag can agitate the sludge at the lower part to some extent. However, since the majority of the sludge is located in the lower part of the mixing outer cylinder 501, the agitation effect of the airbag alone on the sludge and clumps at the bottom of the mixing outer cylinder 501 is still very limited. When the sludge and clumps at the bottom of the mixing outer cylinder 501 want to rise so that they can be broken up by the breaking structure and better propelled forward by the mixing and conveying auger blades 503 with the sludge flow, their ascent is hindered by the large amount of sludge covering them from above. Therefore, it remains difficult to increase the probability of the sludge and clumps at the bottom of the mixing outer cylinder 501 being broken up and to increase the efficiency of their propulsion.

[0070] In this solution, an active intervention mechanism is designed specifically to address the problems of poor fluidity and difficulty in breaking up clumps of bottom sludge: the compression airbag 704 is inflated, pushing the two ends of the U-shaped stainless steel spring 703 together. The bottom of the U-shaped stainless steel spring 703 sinks down, causing the bottom sludge in the nearby area to move further down and accumulate. Then, the compression airbag 704 is quickly deflated, and the U-shaped stainless steel spring 703 bounces violently upwards due to its own elasticity, greatly stirring up or even throwing up the accumulated bottom sludge and clumps, allowing them to be fully integrated into the mainstream material. Through the characteristic that the U-shaped stainless steel spring 703 can bounce onto the crushing structure it passes through, strong vibrations are generated, which can shake off the sludge that has hardened on the crushing structure, achieving self-cleaning of the crushing structure. At the same time, its reaction force further enhances the "throwing" effect of the spring on the sludge. This synergistic effect of "bottom disturbance + structural impact" completely solves the problems of stagnation and clumping in the bottom dead zone, and significantly improves the overall mixing uniformity of the sludge. U-shaped stainless steel spring 703 can also be made of other metal sheets with good elasticity. When in contact with a broken structure, U-shaped stainless steel spring 703 is almost immune to wear and will not cause damage to the inflatable airbag layer structure.

[0071] The conveying pipeline includes a discharge horizontal pipe 801, a discharge vertical pipe 802 with its lower end closed, a plunger pump 803, and a horizontally arranged pressurized conveying pipe 804. The outer cylinder discharge port 501b, the upper ends of the discharge horizontal pipe 801 and the discharge vertical pipe 802 are connected in sequence. The working chamber of the plunger pump 803 is connected to the discharge vertical pipe 802. One end of the pressurized conveying pipe 804 is connected to the discharge vertical pipe 802, and the other end of the pressurized conveying pipe 804 is connected to the sludge incinerator 6 through the incinerator feed pipe 804.1. The working chamber of the plunger pump 803, the discharge vertical pipe 802, and the pressurized conveying pipe 804 are arranged in sequence along the length of the pressurized conveying pipe 804.

[0072] The homogeneous sludge first collects in the discharge vertical pipe 802. The plunger pump 803 periodically assists in sucking the material from the vertical pipe and pushes it into the horizontal conveying pipe under high pressure. At the same time, this piston-type pushing method provides a strong and stable conveying force for the viscous sludge, overcomes the resistance of long-distance, especially horizontal, conveying, and ensures the continuity, stability and controllability of feeding into the sludge incinerator 6, avoiding feeding interruptions caused by poor conveying.

[0073] The pressurized conveying pipe 804 is equipped with a crushing filter plate 604.1, which has multiple crushing filter holes 604.1a. The conveying pipeline also includes a first high-pressure air pipe 805 and a second high-pressure air pipe 806 supplied by a high-pressure air source. The first high-pressure air pipe 805 is connected to the pressurized conveying pipe 804 through a front branch pipe 805.1 and a rear branch pipe 805.2. A first solenoid valve is installed on the first high-pressure air pipe 805. The mixing outer cylinder 501 has an outer cylinder return port 501c located above the outer cylinder outlet 501b. The pressurized conveying pipe 804 is connected to the outer cylinder return port 501c through a return pipe 807. The discharge vertical pipe 802, the front branch pipe 805.1, and the pressurized conveying pipe 804 are connected to each other. The connection points, the crushing filter plate 604.1, and the connection points between the rear branch pipe 805.2 and the pressurized conveying pipe 804 are arranged sequentially along the length of the pressurized conveying pipe 804. The connection points between the discharge vertical pipe 802, the return pipe 807 and the pressurized conveying pipe 804, and the crushing filter plate 604.1 are arranged sequentially along the length of the pressurized conveying pipe 804. The connection point between the front branch pipe 805.1 and the pressurized conveying pipe 804 is located below the connection point between the return pipe 807 and the pressurized conveying pipe 804. The second high-pressure gas pipe 806 is connected to the incinerator feed pipe 804.1. A second solenoid valve is provided on the second high-pressure gas pipe 806. The second high-pressure gas pipe 806, the connection point between the second high-pressure gas pipe 806 and the incinerator feed pipe 804.1, and the feed inlet of the sludge incinerator 6 are arranged sequentially along the gas supply direction of the second high-pressure gas pipe 806.

[0074] The crushing filter plate 604.1 performs a final forced shearing and crushing of the incoming sludge to ensure that no large particles enter the sludge incinerator 6. When the filter holes are partially blocked, the first high-pressure gas pipe 805 is opened, and high-pressure gas is blown from both the front and rear sides of the filter plate to clear the filter holes. The blocked or compacted lumps are also blown back to the homogenizing and mixing device for further processing through the return pipe 807. At the same time, through this closed-loop design of "final check + blockage feedback", not only is the quality of the feed further improved, but the self-maintenance of the system is also realized, ensuring the reliability of long-term operation. The second high-pressure gas pipe 806 can inject gas when needed to assist the material in entering the furnace and adjust the pressure near the feed inlet of the sludge incinerator 6.

[0075] Note: The high-pressure gas source can be a commonly used gas source structure such as a high-pressure gas storage tank, which can be supplied by gas supply equipment such as an air compressor. There are no specific limitations, as long as it can provide high-pressure gas.

[0076] It also includes a control host 9, which is a host computer or industrial control computer. A dry sludge moisture content detector 12.1 electrically connected to the control host 9 is installed at the dry sludge discharge port 12. A wet sludge moisture content detector 22.1 electrically connected to the control host 9 is installed at the wet sludge discharge port 22. An outer cylinder discharge sludge moisture content detector 501.2 electrically connected to the control host 9 is installed at the outer cylinder discharge port 501b. The sludge incinerator 6 includes an incinerator DCS. The incinerator DCS includes an incinerator temperature detector, which is electrically connected to the control host 9.

[0077] The incinerator DCS includes an in-furnace pressure detector, which is electrically connected to the control host 9. Both the dry sludge discharge valve and the wet sludge discharge valve are electrically controlled regulating valves. The dry sludge discharge valve, the wet sludge discharge valve, and the front screw feeder 4 are all electrically connected to the control host 9.

[0078] The DCS (Distributed Control System) for incinerators is existing technology and can include in-furnace temperature detectors, in-furnace pressure detectors, oxygen concentration detectors, etc.

[0079] Moisture content detectors are existing technology.

[0080] The material discharge valve can be an electrically controlled regulating valve. The material discharge valve, wet sludge screw feeder 23, elevator 603, venting solenoid valve, inflation solenoid valve, exhaust solenoid valve, intake solenoid valve, first solenoid valve, and second solenoid valve are all electrically connected to the control host 9.

[0081] The control commands of the main control unit 9 can directly and quickly drive the actuators such as the dry sludge discharge valve and the wet sludge discharge valve, thereby better regulating the material flow rate and ratio. At the same time, by coupling and analyzing multiple parameters such as the feed rate, the temperature of the sludge incinerator 6, and the pressure of the sludge incinerator 6, the main control unit 9 can make more optimized decisions (such as increasing the proportion of high-calorific-value dry sludge when the furnace temperature is too low, and reducing the total feed rate when the furnace pressure is abnormal), realizing intelligent feeding that is deeply coordinated with the incineration process.

[0082] Here are some more examples:

[0083] A dual closed-loop control strategy for moisture content can be implemented. The feedforward control loop involves installing a support-type weighing sensor at the bottom of both the dry sludge storage tank 1 and the wet sludge storage tank 2, and reading the mass change values ​​of the support-type weighing sensors at the bottom of the dry and wet sludge storage tanks 2 in real time. , And the real-time moisture content M measured by the dry sludge moisture content detector 12.1 d The real-time moisture content M measured by the wet sludge moisture content detector 22.1 w Based on the dry solids mass conservation model, the target moisture content M is calculated.G And the required ratio of dry to wet sludge, namely:

[0084] ;

[0085] Required sludge ratio:

[0086] ;

[0087] The theoretical frequency f of the drive motor for the sludge conveyor belt 3 is converted into d The theoretical frequency f of the motor of the wet sludge screw feeder 23 w ;

[0088] Feedback control loop: Real-time reading of the moisture content M of the mixed sludge measured by the sludge moisture content detector 501.2 at the outlet of the homogenizing mixer (outer cylinder outlet 501b). out Calculate its relationship with the target moisture content M. target The deviation e(k) is used; a dual-input single-output PID controller is adopted, with the deviation e(k) and its rate of change Δe(k) as inputs, and the output is the frequency correction amount Δf for the drive motor of the sludge conveyor belt 3. d And the frequency correction Δf of the motor of the wet sludge screw feeder 23. w These two corrections are weighted and added to the feedforward loop output f. d and f w Above. The weighting coefficients are dynamically adjusted based on the current moisture content of dry and wet sludge (materials with higher moisture content have a correspondingly lower flow correction weight to reduce their impact on fluctuations in the mixed moisture content), resulting in the final frequency command F. d =f d +K1×Δf d F w =f w +K2×Δf w K1 and K2 are adjustable gain coefficients used to match the response characteristics of different actuators.

[0089] Adaptive torque adjustment strategy: The mixing motor 5 is equipped with a torque sensor, which pre-stores the relationship curve between moisture content and torque and the sludge characteristic model based on existing technology; the feedforward torque is set according to the upstream moisture content, and feedback adjustment is performed based on the actual detected torque. The mixing torque is maintained within the set range by adjusting the drive frequency of the mixing motor 5; if the real-time torque T exceeds the upper limit T... max If the sludge mixing is insufficient, the amount of wet sludge added should be increased or the mixing time extended; if T is lower than the lower limit T... minIf the mixed sludge is too thin (high water content), add dry sludge appropriately; if the torque T surges, the mixing shaft 502 may be stuck, reduce the mixing shaft speed, and reverse it appropriately for a short time to clear the blockage.

[0090] Co-feeding strategy with sludge incinerator 6: Based on parameters such as furnace temperature and negative pressure obtained in real time from the incinerator DCS, dynamically adjust the ratio of dry and wet sludge, total feed amount and feed rate; increase the proportion of dry sludge to increase calorific value when the furnace temperature drops, increase the proportion of wet sludge to slow down combustion when the furnace temperature is too high, and reduce the total feed amount to maintain furnace stability when the negative pressure is abnormal.

[0091] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the embodiments above are only for helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A sludge mixing, feeding, and treatment system, characterized in that, include: A dry sludge storage tank is provided with several dry sludge agitating blades driven by a dry sludge agitating motor. A dry sludge discharge port is provided at the bottom of the dry sludge storage tank, and a dry sludge discharge valve is provided on the dry sludge discharge port. A wet sludge storage tank is provided with several wet sludge agitating blades driven by a wet sludge agitating motor. A wet sludge discharge port is provided at the bottom of the wet sludge storage tank, and a wet sludge discharge valve is provided on the wet sludge discharge port. A sludge premixing and conveying device, comprising a sludge conveying belt located below the dry sludge outlet, a wet sludge conveying structure for conveying wet sludge supplied from the wet sludge outlet to the sludge conveying belt, and a front screw feeder, wherein the feed end of the front screw feeder is provided with a front feed hopper for receiving sludge on the sludge conveying belt. A homogenizing mixing device includes a horizontally placed mixing outer cylinder and a mixing and stirring shaft located inside the mixing outer cylinder and driven by a mixing and stirring motor. The upper part of one end of the mixing outer cylinder is provided with an outer cylinder inlet that connects to the discharge end of the front screw conveyor, and the lower part of the other end of the mixing outer cylinder is provided with an outer cylinder discharge outlet. The mixing and stirring shaft is provided with mixing and conveying auger blades, at least one primary crushing fork, at least one secondary crushing fork, and at least one tertiary crushing fork. The outer cylinder inlet, any one primary crushing fork, any one secondary crushing fork, and any one tertiary crushing fork are arranged sequentially along the axial direction of the mixing and stirring shaft. The sludge incinerator has its outer cylinder outlet connected to the sludge incinerator's inlet via a conveying pipeline. The mixing outer cylinder is provided with an inflatable airbag layer structure covering the inner circumferential sidewall of the mixing outer cylinder. The inflatable airbag layer structure includes at least one airbag body, and the airbag body is provided with a deflation pipe and an inflation pipe. The deflation pipe is provided with a deflation solenoid valve, and the inflation pipe is connected to a high-pressure gas source. The inflation pipe is provided with an inflation solenoid valve. The inflatable airbag layer structure includes two airbags, one of which is located above the other. The airbag at the top is defined as the upper semicircular airbag, and the other airbag is defined as the lower semicircular airbag. It also includes several active variable-heel structures. The primary, secondary, and tertiary breaker forks are all defined as breaker structures. Each breaker structure corresponds one-to-one with an active variable-heel structure. In the corresponding breaker structure and active variable-heel structure: the active variable-heel structure includes a U-shaped stainless steel spring for impacting the breaker structure and two compression airbags for compressing the outer surfaces of both ends of the U-shaped stainless steel spring. The U-shaped stainless steel spring has its opening facing upwards. The outer side of the U-shaped stainless steel spring consists of two symmetrically arranged top outer sides and a U-shaped outer side. The top outer side, the U-shaped outer side, and the other top outer side are arranged sequentially and continuously. The compression airbag is located on the lower semi-circular airbag. One top outer side is attached to and fixed to one compression airbag, and the other top outer side is attached to and fixed to another compression airbag. The U-shaped outer side is attached to and fixed to the lower semi-circular airbag. The compression airbag is equipped with an exhaust pipe and an air inlet pipe. The exhaust pipe is equipped with an exhaust solenoid valve, and the air inlet pipe is connected to a high-pressure air source. The air inlet pipe is equipped with an air inlet solenoid valve.

2. The sludge mixing, feeding, and treatment system according to claim 1, characterized in that, The sludge premixing and conveying device also includes a pressure roller frame, an embedded distribution frame, and a lifting machine for driving the embedded distribution frame to rise and fall. The pressure roller frame is equipped with an automatic pressure roller that is rotatably connected to the pressure roller frame and located above the sludge conveying belt. The embedded distribution frame is equipped with a distribution pipe supplied by the wet sludge conveying structure and several trenching plows for trenching the dry sludge layer on the sludge conveying belt. The distribution pipe is equipped with several injection nozzles that correspond one-to-one with the trenching plows and are used to inject wet sludge into the trenches dug by the corresponding trenching plows. The inlet end of the injection nozzle is connected to the distribution pipe, and the injection nozzle is equipped with an injection outlet valve. The dry sludge outlet, any trenching plow, any injection nozzle, and the automatic pressure roller are arranged sequentially along the conveying direction of the sludge conveying belt.

3. The sludge mixing, feeding, and treatment system according to claim 2, characterized in that, The wet sludge conveying structure includes a wet sludge screw feeder. The discharge end of the wet sludge screw feeder is the discharge end of the wet sludge conveying structure. The discharge end of the wet sludge screw feeder is connected to the distribution pipe through a wet sludge conveying hose.

4. A sludge mixing, feeding, and treatment system according to claim 1, 2, or 3, characterized in that, The primary breaker fork includes a primary inner fork frame mounted on the mixing shaft, a primary outer fork frame mounted on the primary inner fork frame, a plurality of primary inner fork rods mounted on the primary inner fork frame, and a plurality of primary outer fork rods mounted on the primary outer fork frame. In a primary breaker fork: the distance between any two adjacent primary inner fork rods is L, and the distance between any two adjacent primary outer fork rods is L. The secondary breaker fork includes a secondary inner fork frame mounted on the mixing shaft, a secondary outer fork frame mounted on the secondary inner fork frame, several secondary inner fork rods mounted on the secondary inner fork frame, and several secondary outer fork rods mounted on the secondary outer fork frame. In a secondary breaker fork: the distance between any two adjacent secondary inner fork rods is M, and the distance between any two adjacent secondary outer fork rods is M. The three-stage breaker fork includes a three-stage inner fork frame mounted on the mixing shaft, a three-stage outer fork frame mounted on the three-stage inner fork frame, several three-stage inner fork rods mounted on the three-stage inner fork frame, and several three-stage outer fork rods mounted on the three-stage outer fork frame. In a three-stage breaker fork: the distance between any two adjacent three-stage inner fork rods is N, and the distance between any two adjacent three-stage outer fork rods is N; L > M > N.

5. A sludge mixing, feeding, and treatment system according to claim 1, 2, or 3, characterized in that, The conveying pipeline includes a discharge horizontal pipe, a discharge vertical pipe with a closed lower end, a plunger pump, and a horizontally arranged pressurized conveying pipe. The outer cylinder discharge port, the upper end of the discharge horizontal pipe and the discharge vertical pipe are connected in sequence. The working chamber of the plunger pump is connected to the discharge vertical pipe. One end of the pressurized conveying pipe is connected to the discharge vertical pipe, and the other end of the pressurized conveying pipe is connected to the sludge incinerator through the incinerator feed pipe. The working chamber of the plunger pump, the discharge vertical pipe and the pressurized conveying pipe are arranged in sequence along the length of the pressurized conveying pipe.

6. The sludge mixing, feeding, and treatment system according to claim 5, characterized in that, The pressurized conveying pipe is equipped with a crushing filter plate, which has multiple crushing filter holes. The conveying pipeline also includes a first high-pressure air pipe supplied by a high-pressure air source and a second high-pressure air pipe supplied by a high-pressure air source. The first high-pressure air pipe is connected to the pressurized conveying pipe through a front branch pipe and a rear branch pipe. A first solenoid valve is installed on the first high-pressure air pipe. The mixing outer cylinder has an outer cylinder return port located above the outer cylinder outlet. The pressurized conveying pipe is connected to the outer cylinder return port through a return pipe. The connection between the discharge vertical pipe, the front branch pipe, and the pressurized conveying pipe is as follows: The connection points of the crushed filter plate and the rear branch pipe with the pressurized conveying pipe are arranged sequentially along the length of the pressurized conveying pipe. The connection points of the discharge vertical pipe, the return pipe and the pressurized conveying pipe, as well as the crushed filter plate, are arranged sequentially along the length of the pressurized conveying pipe. The connection point of the front branch pipe with the pressurized conveying pipe is located below the connection point of the return pipe and the pressurized conveying pipe. The second high-pressure gas pipe is connected to the incinerator feed pipe. The second high-pressure gas pipe is equipped with a second solenoid valve. The inlet of the sludge incinerator, the connection point of the second high-pressure gas pipe and the incinerator feed pipe, are arranged sequentially along the gas supply direction of the second high-pressure gas pipe.

7. A sludge mixing, feeding, and treatment system according to claim 1, 2, or 3, characterized in that, It also includes a control host, a dry sludge moisture content detector electrically connected to the control host at the dry sludge discharge port, a wet sludge moisture content detector electrically connected to the control host at the wet sludge discharge port, and an outer cylinder discharge sludge moisture content detector electrically connected to the control host at the outer cylinder discharge port. The sludge incinerator includes an incinerator DCS, and the incinerator DCS includes an incinerator temperature detector electrically connected to the control host.

8. The sludge mixing, feeding, and treatment system according to claim 7, characterized in that, The incinerator DCS includes an in-furnace pressure detector, which is electrically connected to the control host. Both the dry sludge discharge valve and the wet sludge discharge valve are electrically controlled regulating valves. The dry sludge discharge valve, the wet sludge discharge valve, and the front screw feeder are all electrically connected to the control host.

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