Water treatment biochemical sludge blending combustion pulping system and method

Abstract

The invention discloses a water treatment biochemical sludge blending combustion pulping system and method.The water treatment biochemical sludge blending combustion pulping system comprises a barrel, an ore feeder, a biochemical sludge water treatment device, a limiting structure and a plurality of rod bodies, the two ends, in the extending direction of the barrel, of the barrel protrude outwards to form a sludge inlet end and an ore inlet end respectively, the ore feeder communicates with the ore inlet end, and the biochemical sludge water treatment device communicates with the limiting structure; the biochemical sludge water treatment device is communicated with the sludge inlet end, the limiting structure is rotatably arranged in the barrel and comprises a first limiting section and a second limiting section, and the first limiting section and the second limiting section are arranged in the circumferential direction of the barrel at an interval; the multiple rod bodies are stacked between the first limiting section and the second limiting section. The multiple rod bodies are stacked between the first limiting section and the second limiting section through the limiting structure, and the inclination angle of the rod bodies is reduced in the process that the rod bodies roll to mill a coal mine in a rod mode, so that jamming between the rod bodies and the lining plate of the barrel is prevented, and the rod milling efficiency and the pulping quality of the coal mine are ensured.

Description

Technical Field

[0001] This invention relates to the field of coal-water slurry preparation technology, and in particular to a system and method for preparing slurry by co-firing biochemical sludge from water treatment. Background Technology

[0002] Coal-water slurry is a low-pollution, high-efficiency, pipeline-transportable coal-based fluid fuel made from approximately 65% ​​coal, 34% water, and 1% additives through physical processing. By adopting a waste resource utilization technology route, the environmentally friendly coal-water slurry developed can greatly improve the environmental benefits of coal-water slurry without increasing costs.

[0003] In related technologies, coal ore needs to be ground using grinding equipment, then wet-mixed with prepared biochemical sludge slurry, and finally processed by Texaco coal-water slurry gasifier to form the finished slurry.

[0004] However, the commonly used grinding equipment is the wet rod mill. When using a wet rod mill to grind coal and biochemical sludge, the rods in the rod mill are affected by the coal and move irregularly under the influence of the coal, which can easily cause the rods to become disordered. This can lead to the rods being blocked or stuck in the cylinder, reducing the rod milling efficiency of the coal and thus reducing the quality and efficiency of coal-water slurry preparation. Summary of the Invention

[0005] The main objective of this invention is to provide a system and method for co-firing and pulping biochemical sludge in water treatment, aiming to solve the technical problem that the rods in the wet rod mill become disordered, which reduces the pulping quality and efficiency of coal-water slurry.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a water treatment biochemical sludge co-firing and pulping system, comprising: The cylinder has a liner on its inner wall and is horizontally positioned. A toothed ring is fitted around the outer periphery of the cylinder and is connected to an external drive unit. The two ends of the cylinder protrude outward along its extension direction to form a mud inlet and a ore inlet, respectively. A discharge port is opened at the bottom of the cylinder and is connected to an external Texaco coal-water slurry gasifier. A feeder, wherein the feeders are spaced apart on one side of the cylinder and communicate with the ore inlet end; A biological sludge water treatment device, wherein the biological sludge water treatment device is spaced apart on the other side of the cylinder and connected to the sludge inlet end; A limiting structure is rotatably disposed within the cylinder, and the limiting structure is disposed near the end of the cylinder; the limiting structure includes a first limiting segment and a second limiting segment, the first limiting segment and the second limiting segment being disposed at intervals along the circumference of the cylinder; Multiple rods, each of which is horizontally arranged, and each of which can be rotatably disposed within the cylinder, are stacked between the first limiting segment and the second limiting segment; The driving component is used to drive the cylinder to rotate so that the plurality of rods roll between the first limiting segment and the second limiting segment.

[0007] Optionally, in the above-mentioned biochemical sludge co-firing and pulping system for water treatment, the biochemical sludge water treatment device includes a shell, a dripping assembly, and an aeration mechanism. The shell is horizontally arranged and positioned above the sludge inlet. A sludge inlet is provided at the top of the shell, and a sludge outlet is provided at the bottom of the shell. The sludge inlet and the sludge outlet are spaced apart horizontally. The dripping assembly is located on the inner top wall of the shell and on one side of the sludge outlet. The aeration mechanism is located on the inner side wall of the shell and below the dripping assembly. The aeration end of the aeration mechanism faces the sludge outlet, and the dripping end of the dripping assembly faces the aeration end of the aeration mechanism.

[0008] Optionally, in the above-mentioned biochemical sludge co-firing and pulping system for water treatment, the inner top wall and the inner bottom wall of the shell are both inclined from the sludge inlet towards the sludge outlet; the sludge inlet is located between the top of the inner top wall and the dripping assembly, and the lowest point of the sludge inlet is located above the sludge outlet; the top of the inner bottom wall is located below the sludge inlet, the jetting mechanism is located between the top of the inner bottom wall and the sludge inlet, and the lowest point of the inner bottom wall is located on one side of the sludge outlet.

[0009] Optionally, in the above-mentioned biochemical sludge co-firing and pulping system for water treatment, the dripping assembly includes a receiving box and multiple dripping heads. The receiving box is installed at the bottom of the inner top wall and has a receiving cavity for containing liquid. Multiple dripping heads are provided at the bottom of the receiving box, and the multiple dripping heads form the dripping end. An inlet pipe is connected to one side of the receiving box.

[0010] Optionally, in the above-mentioned biochemical sludge co-firing and pulping system for water treatment, the jetting mechanism includes a mounting frame, a main air pipe, branch air pipes, and nozzles. The mounting frame is disposed on the inner side wall of the housing, and the main air pipe is mounted on the mounting frame. The main air pipe is horizontally arranged and connected to an air inlet pipe. The branch air pipes include multiple ones, which are spaced apart along the extension direction of the main air pipe on the side of the main air pipe facing the sludge outlet. The nozzles include multiple ones, and the number of nozzles is consistent with the number of branch air pipes and is arranged in a one-to-one correspondence. The nozzles form the jetting end.

[0011] Optionally, in the above-mentioned biochemical sludge co-firing and pulping system for water treatment, the feeder protrudes outward on the side facing the cylinder to form a first mounting cylinder, which is connected to the ore inlet end of the cylinder and via a first rotating flange; the biochemical sludge water treatment device protrudes outward on the side facing the cylinder to form a second mounting cylinder, which is connected to the sludge inlet end of the cylinder and via a second rotating flange. The limiting structure includes two components: one limiting structure is rotatably connected to the first mounting cylinder, and the other limiting structure is rotatably connected to the second mounting cylinder.

[0012] Optionally, in the above-mentioned biochemical sludge co-firing and pulping system for water treatment, the limiting structure includes an installation shaft, a support, a bearing assembly, and a limiting frame. The support is installed on the first installation cylinder or the second installation cylinder; the installation shaft is horizontally arranged, one end of the installation shaft is rotatably connected to the support via a flange bearing, and the bearing assembly is sleeved on the other end of the installation shaft; the limiting frame is connected to the installation shaft via the bearing assembly. The limiting frame includes a first limiting strip and a second limiting strip, which are connected to form an X-shaped structure. The first limiting strip has a first strip-shaped through-slot aligned with its extension direction, and the second limiting strip has a second strip-shaped through-slot aligned with its extension direction. The first and second strip-shaped through-slots communicate at their connection point. Multiple first limiting posts are slidably disposed within the first strip-shaped through-slot, and these posts are aligned with the extension direction of the cylinder. Multiple second limiting posts are slidably disposed within the second strip-shaped through-slot, and these posts are aligned with the extension direction of the cylinder. The number of second limiting posts is the same as the number of first limiting posts, and they are arranged in a one-to-one correspondence. The first strip-shaped through-slot and the first limiting posts form the first limiting segment, and the second strip-shaped through-slot and the second limiting posts form the second limiting segment.

[0013] Optionally, in the above-mentioned biochemical sludge co-firing and pulping system for water treatment, the width of the first strip channel is less than or equal to the width of the second strip channel, and the diameter of the first limiting post is less than or equal to the diameter of the second limiting post.

[0014] Optionally, in the above-mentioned biochemical sludge co-firing and pulping system for water treatment, the weight of both the first limiting column and the second limiting column is greater than the weight of the rod body, and the weight of the first limiting column is less than or equal to the weight of the second limiting column.

[0015] Secondly, the present invention provides a method for co-firing and pulping water treatment biochemical sludge, using the water treatment biochemical sludge co-firing and pulping system as described above, the method comprising: After the biochemical sludge with a water content of ≥98% is concentrated to a solid content of 5% in the sludge tank, primary sludge is formed. The primary sludge is transported to the biochemical sludge water treatment device via a sludge pump. The biochemical sludge water treatment device adds additives to the primary sludge to form premixed sludge; The feeder is used to feed coal ore into the cylinder from the ore inlet end, and the premixed sludge is introduced into the cylinder from the sludge inlet end. The premixed sludge and the coal mine are rod-milled using the cylinder, the limiting structure, and the multiple rods to form a coal slurry. The coal slurry is processed using the Texaco coal-water slurry gasifier to form a finished slurry.

[0016] The above-described one or more technical solutions provided by this invention can have the following advantages or at least achieve the following technical effects: This invention proposes a water treatment biochemical sludge co-firing and pulping system and method. Multiple rods are stacked between a first and second limiting section using a limiting structure. As the rods roll with the rotation of the cylinder, they remain within this limiting section. During the rod grinding process, the rods' inclination angle is reduced, preventing jamming between the rods and the cylinder liner, thus ensuring the grinding efficiency of the coal sludge. Since the limiting structure moves only with the rods, its trajectory matches the rods' trajectory. This increases the cylinder's rotation speed to improve the pulping efficiency of the coal-water sludge while ensuring the rod grinding effect and guaranteeing the sludge quality. Furthermore, the biochemical sludge water treatment device premixes the biochemical sludge in the sludge tank with additives, improving the uniformity of sludge preparation and further enhancing the sludge quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the biochemical sludge co-firing and pulping system for water treatment according to the present invention; Figure 2 This is a schematic diagram of the installation structure of the limiting structure and the cylinder involved in the present invention; Figure 3 This is a schematic diagram of the limiting structure and the rod body involved in the present invention; Figure 4 This is a schematic diagram of the bearing assembly and limiting frame involved in the present invention; Figure 5 This is an internal schematic diagram of the biochemical sludge water treatment device involved in the present invention; Figure 6 This is a schematic diagram of the process for the biochemical sludge co-firing and pulping method for water treatment according to the present invention.

[0019] Reference numerals: 100, cylinder; 110, gear ring; 101, sludge inlet; 102, ore inlet; 103, discharge port; 200, feeder; 300, biochemical sludge water treatment device; 400, limiting structure; 401, first limiting section; 402, second limiting section; 500, rod; 310, shell; 320, dripping assembly; 330, jetting mechanism; 301, dripping end; 302, jetting end; 311, inner top wall; 312, inner bottom wall; 3 13. Mud inlet; 314. Mud outlet; 321. Receiving box; 322. Drip head; 331. Mounting bracket; 332. Air inlet pipe; 210. First mounting cylinder; 340. Second mounting cylinder; 410. Mounting shaft; 420. Support; 430. Bearing assembly; 440. Limiting frame; 441. First limiting strip; 442. Second limiting strip; 443. First strip-shaped through groove; 444. Second strip-shaped through groove; 445. First limiting post; 446. Second limiting post.

[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this 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 this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] It should be noted that in the embodiments of the present invention, all directional indications (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0023] In this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element. Furthermore, the meaning of "and / or" throughout the text includes three parallel options; for example, "A and / or B" includes option A, option B, or options where both A and B are satisfied.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements.

[0025] In this invention, if there are descriptions involving "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0026] In this invention, the use of suffixes such as "module," "component," "part," "unit," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" can be used interchangeably.

[0027] For those skilled in the art, the specific meanings of the above terms in this invention can be understood according to the specific circumstances. Furthermore, the technical solutions of the various embodiments can be combined with each other; however, this is based on the premise that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0028] The inventive concept of the present invention will be further explained below with reference to some specific embodiments.

[0029] This invention proposes a system and method for co-firing and pulping biological sludge in water treatment.

[0030] Reference Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the biochemical sludge co-firing and pulping system for water treatment according to the present invention. Figure 2 This is a schematic diagram of the installation structure of the limiting structure and the cylinder involved in the present invention.

[0031] In one embodiment of the present invention, such as Figure 1 and Figure 2 As shown, a biochemical sludge co-firing and pulping system for water treatment includes a cylinder 100, a feeder 200, a biochemical sludge water treatment device 300, a limiting structure 400, and multiple rods 500. The inner wall of the cylinder 100 is lined with a liner. The cylinder 100 is horizontally positioned, and a toothed ring 110 is fitted around its periphery, connecting to an external driving component. The two ends of the cylinder 100 protrude outwards along its extension direction to form a sludge inlet 101 and a ore inlet 102, respectively. A discharge port 103 is opened at the bottom of the cylinder 100, communicating with an external Texaco coal-water slurry gasifier. The feeders 200 are spaced apart on one side of the cylinder 100 and communicate with the ore inlet 102. The biochemical sludge water treatment device 300... A spacer is disposed on the other side of the cylinder 100 and communicates with the sludge inlet 101; a limiting structure 400 is rotatably disposed inside the cylinder 100, and the limiting structure 400 is disposed near the end of the cylinder 100; the limiting structure 400 includes a first limiting segment 401 and a second limiting segment 402, which are spaced apart along the circumference of the cylinder 100; each rod 500 is disposed horizontally, and each rod 500 is rotatably disposed inside the cylinder 100, with multiple rods 500 stacked between the first limiting segment 401 and the second limiting segment 402; wherein, the driving member is used to drive the cylinder 100 to rotate so as to drive multiple rods 500 to roll between the first limiting segment 401 and the second limiting segment 402.

[0032] It should be noted that the driving component is a motor in the prior art, the output end of the driving component is connected to the gear ring 110 through a gear set, and the specific driving method of this cylinder 100 is the gasification rod mill in the prior art; the inner wall structure of the cylinder 100 is the same as the inner wall structure of the wet rod mill in the prior art; the discharge port 103 is connected to the Texaco coal-water slurry gasifier in the prior art through a coal slurry pump in the prior art.

[0033] It should be understood that after the biochemical sludge in the sludge tank is premixed with additives through the biochemical sludge water treatment device 300, it is fed into the cylinder 100 through the sludge inlet end 101. Then, the coal ore is fed into the cylinder 100 through the ore feeder 200 from the ore inlet end 102. The drive unit drives the gear ring 110 to rotate, thereby causing the cylinder 100 to rotate. At this time, the rods 500 inside the cylinder 100 roll along the circumference of the cylinder 100 under the rotation of the cylinder 100, thereby preparing coal slurry. During this process, since all the rods 500 are piled up between the first limiting section 401 and the second limiting section 402 of the limiting structure 400, the rods 500 are blocked by the limiting structure 400 when they tilt within the fan-shaped area formed by the first limiting section 401 and the second limiting section 402. This prevents the rods 500 from having an excessive tilt angle and getting stuck with the inner wall liner of the cylinder 100, thereby increasing the rotational speed of the cylinder 100 to increase the pulping rate and ensuring the normal movement of the rods 500 inside the cylinder 100.

[0034] It is worth noting that, since the limiting structure 400 is rotatably disposed inside the cylinder 100, and the limiting structure 400 is not driven by a driving component, the limiting structure 400 only rotates with the displacement of the rods 500 when the multiple rods 500 piled between the first limiting section 401 and the second limiting section 402 are displaced along the circumference of the cylinder 100. This ensures that the movement trajectory of the limiting structure 400 and the rods 500 are matched, preventing the limiting structure 400 from affecting the movement trajectory of the rods 500 and ensuring the normal rod grinding effect of the rods 500. Furthermore, when multiple rods 500 are piled between the first limiting section 401 and the second limiting section 402, there is a gap between the rods 500 and the first limiting section 401 or the second limiting section 402, so that the coal can smoothly enter between two or more adjacent rods 500 and be rod ground.

[0035] The technical solution of this invention uses a limiting structure 400 to stack multiple rods 500 between a first limiting section 401 and a second limiting section 402. As the rods 500 roll with the rotation of the cylinder 100, they remain within the first limiting section 401 and the second limiting section 402. During the rod milling process, the inclination angle of the rods 500 is reduced, thereby preventing jamming between the rods 500 and the liner of the cylinder 100, ensuring the efficiency of the rod mill in the coal mine. The limiting structure 400 moves only with the movement of the rod 500. The movement trajectory of the limiting structure 400 is matched with the movement trajectory of the rod 500. While increasing the rotation speed of the cylinder 100 to improve the pulping efficiency of the coal-water slurry, it ensures the rod milling effect of the rod 500 and guarantees the pulping quality of the coal-water slurry. Furthermore, the biochemical sludge water treatment device 300 premixes the biochemical sludge in the sludge tank with additives, which improves the uniformity of sludge preparation and thus improves the pulping quality of the coal-water slurry.

[0036] Continue to refer to Figure 1 and refer to Figure 5 , Figure 5 This is a schematic diagram of the internal structure of the biochemical sludge water treatment device involved in this invention.

[0037] Furthermore, such as Figure 1 and Figure 5 As shown, the biochemical sludge water treatment device 300 includes a shell 310, a dripping assembly 320, and an aeration mechanism 330. The shell 310 is horizontally arranged and is located above the sludge inlet 101. The top of the shell 310 has a sludge inlet 313, and the bottom of the shell 310 has a sludge outlet 314. The sludge inlet 313 and the sludge outlet 314 are spaced apart in the horizontal direction. The dripping assembly 320 is located on the inner top wall 311 of the shell 310 and is located on one side of the sludge outlet 314. The aeration mechanism 330 is located on the inner side wall of the shell 310 and is located below the dripping assembly 320. The aeration end 302 of the aeration mechanism 330 is positioned towards the sludge outlet 314, and the dripping end 301 of the dripping assembly 320 is positioned towards the aeration end 302 of the aeration mechanism 330.

[0038] It should be noted that a sludge premixing space is formed inside the shell 310, which is enclosed by the inner side wall, the inner bottom wall 312 and the inner top wall 311 of the shell 310.

[0039] It should be understood that after the biochemical sludge enters the shell 310 through the sludge inlet 313, during the process of entering the sludge premixing space from the sludge inlet 313, the dripping end 301 of the dripping component 320 drips the additive to the jetting end 302 of the jetting mechanism 330. The jetting end 302 of the jetting mechanism 330 blows the additive dripped from the dripping component toward the biochemical sludge entering from the sludge inlet 313. During this process, the jetting end 302 of the jetting mechanism 330 can not only disperse the additive dripped from the dripping component 320, but also disperse part of the biochemical sludge, thereby expanding the contact area between the biochemical sludge and the additive, thus ensuring the premixing treatment effect of the biochemical sludge and improving the slurry quality of the coal-water slurry.

[0040] It is worth noting that since the trickling component does not come into direct contact with the biochemical sludge, it ensures that the trickling end of the component will not be blocked by the biochemical sludge, thereby improving the service life of the component and reducing its maintenance costs. The jetting mechanism 330 only needs to spray high-pressure gas, and there is no power connection between the jetting mechanism 330 and the trickling component, making it more convenient for maintenance and inspection, and easier to disassemble and install. Since the jetting mechanism 330 is located below the sludge inlet 313, the biochemical sludge flows under the influence of gravity during the process of entering the sludge premixing space, reducing the power source for the flow of the biochemical sludge and making the structure of the biochemical sludge water treatment device 300 simpler and more practical.

[0041] Continue to refer to Figure 5 .

[0042] Furthermore, such as Figure 5 As shown, the inner top wall 311 and the inner bottom wall 312 of the shell 310 are both inclined from the mud inlet 313 toward the mud outlet 314; the mud inlet 313 is located between the top of the inner top wall 311 and the dripping assembly 320, and the bottom of the mud inlet 313 is located above the mud outlet 314; the top of the inner bottom wall 312 is located below the mud inlet 313, the jetting mechanism 330 is located between the top of the inner bottom wall 312 and the mud inlet 313, and the bottom of the inner bottom wall 312 is located on one side of the mud outlet 314.

[0043] It should be understood that, in order to facilitate the flow of biochemical sludge, the inner bottom wall 312 of the shell 310 is inclined so that after the biochemical sludge enters the sludge premixing space from the sludge inlet 313, it will spontaneously flow towards the sludge outlet 314 under the action of gravity, thereby reducing the power source required for conveying biochemical sludge in the biochemical sludge water treatment device 300 and reducing the pretreatment cost of biochemical sludge; since part of the biochemical sludge will come into contact with the inner top wall 311 of the shell 310 when the jet end 302 of the jet mechanism 330 blows the biochemical sludge, in order to reduce the loss of biochemical sludge, the inner top wall 311 of the shell 310 is inclined.

[0044] Furthermore, the dripping assembly 320 includes a receiving box 321 and a plurality of dripping heads 322. The receiving box 321 is installed at the bottom of the inner top wall 311. The receiving box 321 has a receiving cavity for containing liquid. The bottom of the receiving box 321 is provided with a plurality of dripping heads 322, which form a dripping end 301. A liquid inlet pipe is connected to one side of the receiving box 321.

[0045] It should be noted that the container 321 is a container for holding additives; the container 321 is connected to an external water pump through an inlet pipe, or to an external additive adding device through an inlet pipe, so as to add additives to the container 321. A valve for opening and closing the inlet pipe is provided in the passage of the inlet pipe.

[0046] It should be understood that when the container 321 contains additives, since the drip head 322 is located at the bottom of the container 321, the additives in the container 321 will drip towards the jet end 302 of the jet mechanism 330 located below the container 321 under the action of gravity. There is no need to add a power source required for extruding the additives, making the method of adding additives simpler, more efficient and easier to maintain.

[0047] Furthermore, the jetting mechanism 330 includes a mounting frame 331, a main air pipe, branch air pipes, and nozzles. The mounting frame 331 is disposed on the inner side wall of the housing 310. The main air pipe is mounted on the mounting frame 331 and is horizontally arranged. An air inlet pipe 332 is connected to the main air pipe. There are multiple branch air pipes, which are spaced apart along the extension direction of the main air pipe on the side of the main air pipe facing the mud outlet 314. There are multiple nozzles, and the number of nozzles is the same as the number of branch air pipes and they are arranged in a one-to-one correspondence. The nozzles form the jetting end 302.

[0048] It should be noted that the nozzle is a blower nozzle or air blower nozzle in the prior art; the air inlet pipe 332 is connected to an external air pump so that the nozzle can spray a high-velocity airflow into the sludge premixing space.

[0049] It should be understood that the nozzle is positioned below the drip head 322 and is horizontally spaced from the drip head 322 so that the drip head 322 is located on the side of the nozzle facing the sludge outlet 314. When the nozzle sprays airflow, the biochemical sludge entering from the sludge inlet 313 will tend to move towards the sludge outlet 314. The nozzle can not only disperse the additives dripping from the drip head 322, but also guide the flow direction of the biochemical sludge, ensuring the conveying efficiency of the biochemical sludge, thereby ensuring the pulping quality and efficiency of the cylinder 100.

[0050] Continue to refer to Figure 1 and Figure 2 .

[0051] Furthermore, such as Figure 1 and Figure 2 As shown, the feeder 200 protrudes outward on the side facing the cylinder 100 to form a first mounting cylinder 210. The first mounting cylinder 210 is connected to the ore inlet end 102 of the cylinder 100 and is connected through a first rotating flange. The biochemical sludge water treatment device 300 protrudes outward on the side facing the cylinder 100 to form a second mounting cylinder 340. The second mounting cylinder 340 is connected to the sludge inlet end 101 of the cylinder 100 and is connected through a second rotating flange. The limiting structure 400 includes two parts, one limiting structure 400 is rotatably connected to the first mounting cylinder 210, and the other limiting structure 400 is rotatably connected to the second mounting cylinder 340.

[0052] It should be noted that the first mounting cylinder 210 and the second mounting cylinder 340 are both external structures independent of the cylinder 100. Therefore, when the cylinder 100 rotates, the first mounting cylinder 210 and the second mounting cylinder 340 will not rotate with the cylinder 100, thereby ensuring that the limiting structure 400 can rotate around the axis of the cylinder 100 with the movement of the rod 500, thereby limiting the tilt angle of the rod 500 and preventing the rod 500 from getting stuck with the liner of the cylinder 100 during the rod grinding process.

[0053] It should be understood that, in order to ensure the limiting effect of the limiting structure 400 on the rod 500, there are two limiting structures 400, and the two limiting structures 400 are distributed at both ends of the cylinder 100 and at the ore inlet 102 and the mud inlet 101. One end of the rod 500 faces the ore inlet 102, and the other end of the rod 500 faces the mud inlet 101, so that the rod 500 is limited to the first limiting section 401 and the second limiting section 402 of the limiting structure 400.

[0054] Continue to refer to Figure 2 and refer to Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the limiting structure and the rod body involved in the present invention. Figure 4 This is a schematic diagram of the bearing assembly and limiting frame involved in the present invention.

[0055] Furthermore, such as Figure 3 and Figure 4As shown, the limiting structure 400 includes a mounting shaft 410, a support 420, a bearing assembly 430, and a limiting frame 440. The support 420 is mounted on the first mounting cylinder 210 or the second mounting cylinder 340. The mounting shaft 410 is horizontally arranged, with one end of the mounting shaft 410 rotatably connected to the support 420 via a flange bearing. The bearing assembly 430 is sleeved on the other end of the mounting shaft 410. The limiting frame 440 is connected to the mounting shaft 410 via the bearing assembly 430. The limiting frame 440 includes a first limiting strip 441 and a second limiting strip 442. The first limiting strip 441 and the second limiting strip 442 are connected to form an X-shaped structure. The first limiting strip 441 has a first strip-shaped through groove 443 that extends in the same direction as the first limiting strip. The second limiting strip 442 has a first strip-shaped through groove 443 that extends in the same direction as the second limiting strip. A second strip-shaped through groove 444 extends in the same direction as the first strip-shaped through groove 443. The second strip-shaped through groove 444 and the first strip-shaped through groove 443 are connected at the connection of the first limiting strip 441 and the second limiting strip 442. A plurality of first limiting posts 445 are slidably arranged in the first strip-shaped through groove 443. The first limiting posts 445 are aligned with the extension direction of the cylinder 100. A plurality of second limiting posts 446 are slidably arranged in the second strip-shaped through groove 444. The second limiting posts 446 are aligned with the extension direction of the cylinder 100. The number of second limiting posts 446 is the same as the number of first limiting posts 445 and they are arranged in a one-to-one correspondence. The first strip-shaped through groove 443 and the first limiting posts 445 form a first limiting section 401. The second strip-shaped through groove 444 and the second limiting posts 446 form a second limiting section 402.

[0056] As an alternative to this embodiment, when there is only one limiting structure 400, the support 420 is installed in the first mounting cylinder 210 or the second mounting cylinder 340, and the mounting shaft 410 needs to extend into the cylinder 100, and the length of the mounting shaft 410 is greater than 1 / 3 of the axial length of the cylinder 100, so as to ensure the limiting effect of the limiting structure 400 on the rod 500. At this time, the depth of the first limiting post 445 inserted into the first strip groove 443 is 1 / 3 of the length of the first limiting post 445. Similarly, the depth of the second limiting post 446 inserted into the second strip groove 444 is 1 / 3 of the length of the second limiting post 446. This setting method ensures that the rod 500 does not become disordered, while allowing the biochemical sludge or coal to enter the cylinder 100 without obstruction, thereby improving the conveying efficiency of the biochemical sludge or coal.

[0057] As another option in this embodiment, when there are two limiting structures 400, one limiting structure 400 is installed in the first mounting cylinder 210 and the other limiting structure 400 is installed in the second mounting cylinder 340. One end of the first limiting post 445 is slidably engaged with the first limiting strip 441 of one limiting structure 400, and the other end of the first limiting post 445 is slidably engaged with the first limiting strip 441 of the other limiting structure 400. That is, the first limiting post 445 is set between the two limiting structures 400. Similarly, the second limiting post 446 is also set between the two limiting structures 400. This setting improves the operational stability of the limiting structure 400 itself, thereby ensuring the grinding efficiency of the rod body 500.

[0058] Furthermore, the width of the first strip groove 443 is less than or equal to the width of the second strip groove 444, and the diameter of the first limiting post 445 is less than or equal to the diameter of the second limiting post 446.

[0059] It should be understood that during the rotation of the cylinder 100, the rod 500 may move from the bottom to the top of the cylinder 100 and then fall. During this process, to prevent misalignment of the first limiting post 445 and the second limiting post 446, the width of the first strip groove 443 and the width of the second strip groove 444 are set to be unequal, thereby preventing interference between the first limiting post 445 and the second limiting post 446. Furthermore, due to the first limiting strip 441 and the second limiting strip 446... 2. With an X-shaped structure, during the circumferential rotation of the rod 500 along the cylinder 100, the top of the first limiting bar 441 or the top of the second limiting bar 442 will not simultaneously reach the highest point inside the cylinder 100. Therefore, the falling time of the first limiting post 445 and the falling time of the second limiting post 446 are different. By differentiating the width of the first strip groove 443 and the second strip groove 444, the mechanical failure rate of the limiting structure 400 during operation can be reduced, ensuring the preparation cycle and slurry efficiency of the coal-water slurry.

[0060] Furthermore, when the rod 500 rotates during its circumferential movement along the cylinder 100, in order to ensure that the first limiting post 445 and the second limiting post 446 can fall before the rod 500, and to ensure the limiting effect of the first limiting post 445 and the second limiting post 446 on the rod 500, preventing the rod 500 from having an inclination angle greater than 60° and easily getting stuck in the inner lining of the cylinder 100, the weight of the first limiting post 445 and the second limiting post 446 is greater than the weight of the rod 500, and the weight of the first limiting post 445 is less than or equal to the weight of the second limiting post 446.

[0061] It should be understood that when multiple rods 500 are stacked between the first limiting segment 401 and the second limiting segment 402, the total stacking height of the rods 500 is less than the total height of the multiple first limiting posts 445 and the total height of the multiple second limiting posts 446, so as to improve the limiting effect of the first limiting segment 401 and the second limiting segment 402 on the rods 500.

[0062] Furthermore, based on the same inventive concept, this invention also proposes a method for co-firing and pulping biochemical sludge in water treatment.

[0063] Continue to refer to Figures 1 to 5 and refer to Figure 6 , Figure 6 This is a schematic diagram of the process for the biochemical sludge co-firing and pulping method for water treatment according to the present invention.

[0064] In one embodiment of the present invention, such as Figures 1 to 5 As shown, a method for co-firing and pulping water treatment biochemical sludge is provided, using the water treatment biochemical sludge co-firing and pulping system as described in the above embodiments. The method includes: Step S10: The biochemical sludge with a water content of ≥98% is directly concentrated in the sludge tank to a solid content of 5% to form primary sludge; Step S20: The primary sludge is transported to the biological sludge water treatment device 300 by a sludge pump; Step S30: The biochemical sludge water treatment device 300 adds additives to the primary sludge to form premixed sludge; Step S40: The coal ore is fed into the cylinder 100 from the ore inlet end 102 using the feeder 200, and the premixed sludge is introduced into the cylinder 100 from the sludge inlet end 101. Step S50: The premixed sludge and the coal are ground using the cylinder 100, the limiting structure 400 and the multiple rods 500 to form a coal slurry; Step S60: The coal slurry is processed using the Texaco coal-water slurry gasifier to form a finished slurry.

[0065] As an exemplary embodiment: A certain project utilizes a 400,000-ton-per-year synthetic ammonia and 700,000-ton-per-year urea plant, employing three Texaco coal-water slurry gasifiers (two operating and one standby) with a coal feed rate of 1000t / d. These gasifiers co-process biochemical sludge with a moisture content ≥98% from various wastewater treatment plants within the plant area (currently, the biochemical sludge from the wastewater treatment plants is concentrated in a thickening tank and then processed by a centrifuge, resulting in a sludge moisture content of approximately 88%, with a biochemical sludge production of approximately 1500t / a). The processing capacity is 1500t / a (moisture content ≥98%, dry sludge 180t / a). The gasification workshop uses 35-40 m³ / h of water for slurry preparation, including 15 m³ / h of fresh water, 20 m³ / h of shift condensate, and 2 m³ / h of sulfur recovery waste liquid.

[0066] Specifically, the system is applied to the two biochemical sludge co-firing and pulping systems for water treatment. It adopts a DN150 pipeline for reclaimed water concentrate or a 2-inch external drainage pipeline for gasification. Two new conveying devices are set up (one in operation and one on standby). The outlet pressure is required to be no less than 0.5MPa and the flow rate is no less than 15m³ / h. The system also adds matching flushing water pipelines and remote flow meters, which are directly introduced into the sludge inlet 313 of the two biochemical sludge water treatment devices 300. After the change, the biochemical sludge generated by the wastewater treatment plant will not undergo dewatering or temporary storage. Instead, the biochemical sludge with a moisture content ≥98% will be directly concentrated in the sludge tank to a solid content of 5%. Then, it will be transported to the biochemical sludge water treatment device 300 via a newly built sludge conveying pipeline using a sludge pump. The premixed sludge will be processed into coal slurry by a grinding water pump, cylinder 100, limiting structure 400, multiple rods 500, and feeder 200, and will be fed into the Texaco coal-water slurry gasifier for co-processing (the conveying will be done through a closed pipeline, regulated by a regulating valve and metered by a flow meter, and then conveyed to the coal mill separately without temporary storage). The flow rate will be controlled at 5 m³ / h. To ensure the safety of cylinder 100 maintenance, a hand valve and a figure-eight blind flange will be installed before the pipeline enters cylinder 100. The biochemical sludge has a high moisture content. After the technical upgrade, the water consumption for pulping in the 100-ton cylinder will be reduced by approximately 5 m³ / h. The reduced water consumption is fresh water. Based on an annual operation of 330 days, the annual water saving is 39,600 m³ / h. The sludge volume after solidification is approximately 180 t / a, and the co-firing ratio is 0.002% of the raw coal, which is extremely small.

[0067] Compared to traditional pulping systems and methods, this biochemical sludge co-firing and pulping system and method reduces water consumption by approximately 39,600 tons per year. This reduction represents the amount of fresh water used, resulting in annual savings of approximately RMB 39,600 (RMB 1 / ton * 39,600 tons / year) in purchased water costs. Simultaneously, it saves approximately RMB 225,000 annually in biochemical sludge hazardous waste disposal costs (RMB 150 / ton * 1500 tons / year), RMB 432,000 in labor costs, RMB 75,000 in woven bag costs, RMB 412,500 in water treatment reagent costs, and RMB 191,000 in centrifuge electricity costs (total motor power 80.5 * 24 hours * RMB 0.3 / kWh * 330 days = RMB 191,268), totaling cost savings of RMB 1,375,100 per year.

[0068] It is worth noting that fluctuations in sludge volume affect the concentration of coal-water slurry and the composition of syngas. The salts in the sludge may corrode process burners, quench rings, and downcomers. Therefore, the following measures are taken: 1) Before the water supply unit transports sludge, contact the quality control center for relevant component analysis. Submit the test results to the production technology department and the gasification workshop. Only after the gasification workshop agrees to accept the sludge should it be transported according to the specified time and flow rate. 2) The gasification workshop observes changes in syngas composition and promptly notifies the purification workshop's conversion unit of the changes. The conversion unit then adjusts the converter temperature accordingly. 3) The gasification workshop regularly tests the water quality of the black water system, collecting and comparing data before and after co-firing. 4) The gasification workshop conducts a thorough inspection of the process burners, quench rings, and downcomers every cycle to assess for corrosion. During gasifier overhauls, relevant pipelines are inspected, and the scaling and corrosion conditions are compared with those before co-firing.

[0069] It should be understood that the specific structure of the water treatment biochemical sludge co-firing and pulping system refers to the above embodiments. Since the water treatment biochemical sludge co-firing and pulping method adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0070] Finally, it should be noted that the sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above embodiments are only optional embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made under the inventive concept of the present invention using the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are all included within the patent protection scope of the present invention.

Claims

1. A water treatment biochemical sludge co-firing and pulping system, characterized in that, include: The cylinder has a liner on its inner wall and is horizontally positioned. A toothed ring is fitted around the outer periphery of the cylinder and is connected to an external drive unit. The two ends of the cylinder protrude outward along its extension direction to form a mud inlet and a ore inlet, respectively. A discharge port is opened at the bottom of the cylinder and is connected to an external Texaco coal-water slurry gasifier. A feeder, wherein the feeders are spaced apart on one side of the cylinder and communicate with the ore inlet end; A biological sludge water treatment device, wherein the biological sludge water treatment device is spaced apart on the other side of the cylinder and connected to the sludge inlet end; A limiting structure is rotatably disposed within the cylinder, and the limiting structure is disposed near the end of the cylinder; the limiting structure includes a first limiting segment and a second limiting segment, the first limiting segment and the second limiting segment being disposed at intervals along the circumference of the cylinder; Multiple rods, each of which is horizontally arranged, and each of which can be rotatably disposed within the cylinder, are stacked between the first limiting segment and the second limiting segment; The driving component is used to drive the cylinder to rotate so that the plurality of rods roll between the first limiting segment and the second limiting segment.

2. The water treatment biochemical sludge co-firing and pulping system as described in claim 1, characterized in that, The biochemical sludge water treatment device includes a shell, a dripping assembly, and an aeration mechanism. The shell is horizontally positioned above the sludge inlet. A sludge inlet is located at the top of the shell, and a sludge outlet is located at the bottom of the shell. The sludge inlet and outlet are spaced apart horizontally. The dripping assembly is located on the inner top wall of the shell and is positioned to one side of the sludge outlet. The aeration mechanism is located on the inner side wall of the shell and below the dripping assembly. The aeration end of the aeration mechanism faces the sludge outlet, and the dripping end of the dripping assembly faces the aeration end of the aeration mechanism.

3. The water treatment biochemical sludge co-firing and pulping system as described in claim 2, characterized in that, The inner top wall and the inner bottom wall of the housing are both inclined from the mud inlet toward the mud outlet; the mud inlet is located between the topmost point of the inner top wall and the dripping assembly, and the lowest point of the mud inlet is located above the mud outlet; the topmost point of the inner bottom wall is located below the mud inlet, the jetting mechanism is located between the topmost point of the inner bottom wall and the mud inlet, and the lowest point of the inner bottom wall is located on one side of the mud outlet.

4. The water treatment biochemical sludge co-firing and pulping system as described in claim 3, characterized in that, The dripping assembly includes a container and multiple drip heads. The container is installed at the bottom of the inner top wall and has a container cavity for containing liquid. Multiple drip heads are provided at the bottom of the container, forming the dripping end. A liquid inlet pipe is connected to one side of the container.

5. The water treatment biochemical sludge co-firing and pulping system as described in claim 4, characterized in that, The jetting mechanism includes a mounting frame, a main air pipe, branch air pipes, and nozzles. The mounting frame is disposed on the inner side wall of the housing, and the main air pipe is mounted on the mounting frame. The main air pipe is horizontally arranged and connected to an air inlet pipe. The branch air pipes include multiple ones, which are spaced apart along the extension direction of the main air pipe on the side of the main air pipe facing the mud outlet. The nozzles include multiple ones, and the number of nozzles is the same as the number of branch air pipes and they are arranged in a one-to-one correspondence. The nozzles form the jetting end.

6. The water treatment biochemical sludge co-firing and pulping system according to any one of claims 1 to 5, characterized in that, The feeder protrudes outward on the side facing the cylinder to form a first mounting cylinder, which is connected to the ore inlet end of the cylinder and is connected through a first rotating flange. The biochemical sludge water treatment device has a second mounting cylinder protruding outward from one side facing the cylinder body. The second mounting cylinder is connected to the sludge inlet end of the cylinder body and is connected through a second rotating flange. The limiting structure includes two components: one limiting structure is rotatably connected to the first mounting cylinder, and the other limiting structure is rotatably connected to the second mounting cylinder.

7. The water treatment biochemical sludge co-firing and pulping system as described in claim 5, characterized in that, The limiting structure includes a mounting shaft, a support, a bearing assembly, and a limiting frame. The support is mounted on the first mounting cylinder or the second mounting cylinder. The mounting shaft is horizontally positioned, with one end rotatably connected to the support via a flange bearing, and the bearing assembly sleeved on the other end of the mounting shaft. The limiting frame is connected to the mounting shaft via the bearing assembly. The limiting frame includes a first limiting strip and a second limiting strip, which are connected to form an X-shaped structure. The first limiting strip has a first strip-shaped through-slot aligned with its extension direction, and the second limiting strip has a second strip-shaped through-slot aligned with its extension direction. The first and second strip-shaped through-slots communicate at their connection point. Multiple first limiting posts are slidably disposed within the first strip-shaped through-slot, and these posts are aligned with the extension direction of the cylinder. Multiple second limiting posts are slidably disposed within the second strip-shaped through-slot, and these posts are aligned with the extension direction of the cylinder. The number of second limiting posts is the same as the number of first limiting posts, and they are arranged in a one-to-one correspondence. The first strip-shaped through-slot and the first limiting posts form the first limiting segment, and the second strip-shaped through-slot and the second limiting posts form the second limiting segment.

8. The water treatment biochemical sludge co-firing and pulping system as described in claim 7, characterized in that, The width of the first strip-shaped through groove is less than or equal to the width of the second strip-shaped through groove, and the diameter of the first limiting post is less than or equal to the diameter of the second limiting post.

9. The water treatment biochemical sludge co-firing and pulping system as described in claim 7, characterized in that, The weight of both the first limiting post and the second limiting post is greater than the weight of the rod body, and the weight of the first limiting post is less than or equal to the weight of the second limiting post.

10. A method for preparing pulp by co-firing biological sludge from water treatment, characterized in that, The method of using the water treatment biochemical sludge co-firing and pulping system as described in any one of claims 1 to 9 includes: After the biochemical sludge with a water content of ≥98% is concentrated to a solid content of 5% in the sludge tank, primary sludge is formed. The primary sludge is transported to the biochemical sludge water treatment device via a sludge pump. The biochemical sludge water treatment device adds additives to the primary sludge to form premixed sludge; The feeder is used to feed coal ore into the cylinder from the ore inlet end, and the premixed sludge is introduced into the cylinder from the sludge inlet end. The premixed sludge and the coal mine are rod-milled using the cylinder, the limiting structure, and the multiple rods to form a coal slurry. The coal slurry is processed using the Texaco coal-water slurry gasifier to form a finished slurry.

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