Device and method for extracting carbon source of sewage treatment plant from kitchen garbage

Abstract

The invention discloses a device and method for extracting a carbon source of a sewage treatment plant from kitchen garbage, and relates to the related technical field of kitchen garbage solid waste treatment.The device comprises a shell, a soaking stirring barrel, a spiral feeding machine and a dewatering centrifugal machine, and the soaking stirring barrel, the spiral feeding machine and the dewatering centrifugal machine are sequentially connected; a filter screen plate is fixedly installed at the position, right opposite to the discharging port, in the shell, a smashing cylinder is fixedly installed between the filter screen plate and the shell, a smashing assembly is arranged in the smashing cylinder, a pushing assembly is arranged on the filter screen plate, and a pretreatment box is fixedly installed at the position, right opposite to the discharging port, on the shell. A feeding hopper is fixedly installed at the top end of the pretreatment box, a pretreatment assembly is arranged in the pretreatment box, a plurality of filtering holes are formed in the bottom of the smashing cylinder, and a material guiding groove is fixedly installed in the shell; according to the kitchen garbage crushing device, kitchen garbage can be crushed more sufficiently, so that the crushing effect on the kitchen garbage can be further improved, and the time required for crushing is saved.

Description

Technical Field

[0001] The present invention relates to the technical field related to kitchen waste solid waste treatment, and specifically to a device and method for extracting carbon source for a sewage treatment plant from kitchen waste. Background Art

[0002] The amount of easily degradable COD in urban sewage is limited, especially in low-carbon source sewage treatment systems, where the C / N ratio is low, making it difficult to achieve ideal nitrogen and phosphorus removal efficiencies at the same time. Traditional methods often use external carbon sources (such as methanol, sodium acetate, etc.) to make up for the lack of carbon sources, but these methods have problems such as high costs and safety hazards. Kitchen waste is rich in organic matter and is a potential source of carbon, so it is of great significance to develop technologies to extract carbon sources from kitchen waste.

[0003] The existing method of extracting carbon source for sewage treatment plant from kitchen waste is large, and the kitchen waste is preliminarily crushed by a crushing device, and then the crushed kitchen waste is transported to a soaking and mixing barrel through a conveying pipe, and the kitchen waste is soaked, hydrolyzed and acidified, and then the solid-liquid mixture after the soaking and hydrolysis is transported by a screw feeder, and the solid-liquid mixture is squeezed and separated by a dehydration centrifuge to obtain kitchen waste filtrate and residue, and then the obtained liquid is purified to remove impurities to obtain the carbon source product required by the sewage treatment plant.

[0004] However, the current crushing devices basically use crushing blades that rotate in one direction at high speed to crush kitchen waste. During the crushing process, the garbage will gradually accumulate on the side walls and bottom of the crushing cylinder under the action of centrifugal force and tangential force, resulting in insufficient crushing of the garbage, a long time required for crushing, and low crushing efficiency. In addition, during the crushing process of the kitchen waste, the crushing equipment will mostly continuously add garbage to the crushing equipment, which will cause the garbage put in front and behind to mix inside the crushing equipment, resulting in insufficient crushing of the garbage with uncrushed garbage. The crushed garbage cannot be discharged in time and will be crushed again, which will reduce the crushing efficiency of the garbage, thereby affecting the continuous and efficient crushing of the kitchen waste by the crushing equipment. In addition. Summary of the invention

[0005] In order to solve the defects of the prior art, the present invention provides a device and method for extracting carbon source for a sewage treatment plant from kitchen waste.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: The present invention discloses a device for extracting carbon source for a sewage treatment plant from kitchen waste, comprising a shell and a soaking and stirring barrel, a screw feeder and a dehydration centrifuge connected in sequence, wherein a feeding port is provided on the shell, a filter plate is fixedly installed in the shell opposite to the feeding port, a crushing cylinder is fixedly installed between the filter plate and the shell, a crushing assembly is arranged in the crushing cylinder, a pushing assembly is arranged on the filter plate, a pretreatment box is fixedly installed on the shell opposite to the feeding port, a feed hopper is fixedly installed on the top of the pretreatment box, a pretreatment assembly is arranged in the pretreatment box, a plurality of filter holes are provided at the bottom of the crushing cylinder, a material guide groove is fixedly installed in the shell, a material delivery pipe is connected in the material guide groove and the material delivery pipe is connected to the soaking and stirring barrel.

[0007] As a preferred technical solution of the present invention, the crushing assembly includes a second driving motor fixedly mounted on a shell, a shaft sleeve is rotatably mounted on the shell, a crushing shaft is rotatably mounted on the shaft sleeve, and the bottom end of the crushing shaft is rotatably connected to the bottom of the crushing barrel, an auxiliary crushing unit is arranged on the shaft sleeve, a plurality of crushing knives are fixedly mounted on the outer surfaces of the crushing shaft and the shaft sleeve, a rotating shaft is rotatably mounted on the shell, and one end of the rotating shaft is fixedly connected to the output end of the second driving motor, a first bevel gear is fixedly mounted on the other end of the rotating shaft, the top end of the crushing shaft extends to the outside of the shell and is fixedly mounted with a second bevel gear, a third bevel gear is fixedly mounted on the top end of the shaft sleeve, and the second bevel gear and the third bevel gear are symmetrically arranged and both mesh with the first bevel gear; The pretreatment component includes two rollers rotatably installed in the pretreatment box, the outer surfaces of the two rollers are fixedly installed with crushing rollers, and the two crushing rollers cooperate with each other, and the two rollers are fixedly installed with transmission gears, and the two transmission gears are meshed with each other. A first drive motor is fixedly installed on the pretreatment box, and the output end of the first drive motor is fixedly connected to one of the rollers.

[0008] As a preferred technical solution of the present invention, the pushing assembly includes a rotating shaft rotatably mounted on a shell, one end of the rotating shaft extends into the shell and is fixedly mounted with a reciprocating screw, the outer surfaces of the rotating shaft and one of the roller shafts are fixedly mounted with synchronous wheels, a belt is sleeved between the two synchronous wheels and connected by a belt transmission, a threaded barrel is threadedly mounted on one end of the reciprocating screw, and a pushing plate is fixedly mounted on one end of the threaded barrel, the pushing plate slides in contact with the upper surface of the filter plate, and a baffle for closing and shielding the discharge port is fixedly mounted on the pushing plate, and the area of ​​the baffle is larger than the area of ​​the discharge port.

[0009] As a preferred technical solution of the present invention, a cavity is opened in the push plate and a cleaning brush is fixedly installed in the cavity, and the brush surface of the cleaning brush is in contact with the upper surface of the filter plate, and the baffle is in contact and slides on the upper surface of the inner wall of the shell.

[0010] As a preferred technical solution of the present invention, a plurality of the crushing knives are evenly distributed in an array along the circumference, a cutting edge is provided on one side of the crushing knives, and a crushing head is fixedly installed on the other side, the crushing knives are arc-shaped, the cutting edge is arranged on the inner arc surface of the crushing knives, and the crushing head is arranged on the outer arc surface of the crushing knives.

[0011] As a preferred technical solution of the present invention, a scraper in an L-shape is fixedly installed at the bottom of the crushing shaft, and the scraper is in contact with the inner wall of the crushing cylinder.

[0012] As a preferred technical solution of the present invention, the auxiliary crushing unit includes a toothed disk fixedly mounted on a shaft sleeve, a plurality of mounting rods are fixedly mounted on the upper surface of the inner wall of the shell, a mounting sleeve is slidably mounted on each of the mounting rods, a plurality of crushing paddles are fixedly mounted on the outer surface of the mounting sleeve, and the crushing paddles are arranged obliquely, a connecting shaft is rotatably mounted on the shell on the same side of each mounting rod, a driving gear is fixedly mounted on one end of the connecting shaft, and the driving gear is fixedly connected to the toothed disk, a rotor is fixedly mounted on the other end of the connecting shaft, and a track groove for cooperating with the rotor is opened on the mounting sleeve.

[0013] As a preferred technical solution of the present invention, the track groove is composed of a plurality of vertical grooves and spiral grooves connected end to end, each of the vertical grooves and spiral grooves is connected at a smooth transition, and the width of the vertical groove is greater than the width of the rotor.

[0014] As a preferred technical solution of the present invention, a counterweight plate is fixedly mounted on the outer surface of the top end of the mounting sleeve, and a friction pad is fixedly mounted on the outer surface of the rotor.

[0015] A method for extracting carbon sources for sewage treatment plants from kitchen waste is applied to a device for extracting carbon sources for sewage treatment plants from kitchen waste in the above technical solution, comprising the following steps: S1. Dispersion and crushing: The kitchen waste to be processed is put into the pretreatment box through the feed hopper, and the kitchen waste is pre-crushed by the crushing roller. The pre-crushed waste falls onto the filter plate through the feed outlet, and is then pushed into the crushing cylinder through the push plate for crushing to obtain organic slurry of appropriate size; S2, soaking and hydrolysis: The crushed kitchen waste is sent into the soaking and stirring barrel through the feeding pipe for soaking, and the organic slurry is hydrolyzed and acidified to be converted into a carbon source form that is easy to extract, so as to increase the relative abundance of acid fermentation bacteria and promote the hydrolysis of macromolecular organic matter; S3, dehydration and separation: the solid-liquid mixture after soaking, hydrolysis and acidification is transported to the dehydration centrifuge via a screw feeder for dehydration treatment and solid-liquid separation to further purify the carbon source; S4. Purification and post-treatment: Purify the obtained liquid and remove impurities to obtain the carbon source product required by the sewage treatment plant.

[0016] The beneficial effects of the present invention are: 1. The device and method for extracting carbon source for sewage treatment plant from kitchen waste, by setting a crushing assembly, the second drive motor drives the rotating shaft and the first bevel gear to rotate, the first bevel gear rotates and drives the crushing knife on the shaft sleeve to rotate clockwise through the third bevel gear, so that the crushing head can crush the kitchen waste, and crush some larger and harder kitchen waste in the kitchen waste. When the first bevel gear rotates, it will drive the crushing knife on the crushing shaft to rotate counterclockwise through the second bevel gear, which can drive the cutting edge to further crush the kitchen waste, and then process the soft and hard kitchen waste separately, so that the kitchen waste is crushed more fully, thereby further improving the crushing effect of the kitchen waste and saving the time required for crushing.

[0017] 2. This device and method for extracting carbon sources for sewage treatment plants from kitchen waste, by setting up an auxiliary crushing unit, the shaft sleeve rotates while driving the toothed disc to rotate, the rotation of the toothed disc drives the connecting shaft and the rotating shaft to rotate through the driving gear, the rotor rotates and rotates in the trajectory groove, driving the mounting sleeve and the crushing paddle to rotate on the mounting rod while moving up and down, thereby changing the movement trajectory of the crushing paddle, which is convenient for fully stirring and crushing the kitchen waste attached to the inner wall and bottom of the crushing barrel, with good crushing effect and high crushing efficiency.

[0018] 3. The device and method for extracting carbon source for sewage treatment plant from kitchen waste, by setting up a pretreatment component, the first drive motor drives one of the crushing rollers to rotate, the rotation of one of the crushing rollers drives the other crushing roller to rotate towards each other through gears, and the two crushing rollers rotate towards each other to pre-crush the kitchen waste entering between the two crushing rollers. Some larger kitchen waste, such as plant roots and stems, can be crushed to facilitate subsequent crushing operations, which can improve the subsequent crushing efficiency and save the time required for crushing.

[0019] 4. The device and method for extracting carbon source for sewage treatment plant from kitchen waste, by setting a pushing assembly, the roller shaft rotates while the transmission of the synchronous wheel and the belt drives the rotating shaft to rotate, the rotation of the rotating shaft drives the pushing plate to reciprocate, and the kitchen waste fallen on the filter plate is pushed into the crushing barrel, the movement of the pushing plate drives the baffle plate to follow the movement, and the reciprocating motion of the pushing plate can repeatedly push the kitchen waste into the crushing barrel, so as to avoid a large amount of kitchen waste being concentrated in the crushing barrel and affecting the crushing effect of the kitchen waste, so that the crushed kitchen waste in the crushing barrel is discharged through the filter hole in time, so as to avoid the accumulation of kitchen waste in the crushing barrel.

[0020] 5. The device and method for extracting carbon source for sewage treatment plant from kitchen waste, by setting a cleaning brush and a filter plate, the movement of the pushing plate drives the cleaning brush to move at the same time, the movement of the cleaning brush can clean the filter plate, to prevent the kitchen waste on the filter plate from clogging the filter holes, to ensure the filtering effect of the filter plate, so that the filter plate can screen and filter the pre-crushed kitchen waste, so that the kitchen waste of appropriate size falls directly into the guide groove through the filter plate, to avoid the kitchen waste from being over-crushed, to save crushing time, and to improve the crushing efficiency.

[0021] 6. The device and method for extracting carbon source for sewage treatment plant from kitchen waste, by arranging a cleaning brush and a scraper, the crushing shaft rotates and drives the scraper to follow the movement, the movement of the scraper can timely scrape off the kitchen waste attached to the inner wall and bottom of the crushing cylinder, and avoid the kitchen waste accumulation on the inner wall of the crushing cylinder and unable to be crushed. At the same time, through the rotation of the scraper, the crushed kitchen waste can be timely scraped through the filter holes into the material guide operation, and the crushed waste cannot be discharged in time and needs to be crushed again, so that the rotating shaft can continuously and efficiently crush the kitchen waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of a device and method for extracting carbon sources for a sewage treatment plant from kitchen waste according to the present invention; Figure 2 It is a schematic diagram of the shell structure of a device and method for extracting carbon sources for a sewage treatment plant from kitchen waste according to the present invention; Figure 3 It is a schematic diagram of the shell cross-section structure of a device and method for extracting carbon sources for a sewage treatment plant from kitchen waste according to the present invention; Figure 4 The present invention Figure 3 A schematic diagram of the structure enlargement in the middle; Figure 5It is a schematic diagram of the structure of a crushing component of a device and method for extracting carbon sources for a sewage treatment plant from kitchen waste according to the present invention; Figure 6 It is a schematic diagram of the structure of an auxiliary crushing unit of a device and method for extracting carbon sources for a sewage treatment plant from kitchen waste according to the present invention; Figure 7 The present invention Figure 6 A magnified schematic diagram of the structure at B in the middle; Figure 8 It is a schematic diagram of the filter plate structure of a device and method for extracting carbon sources for a sewage treatment plant from kitchen waste according to the present invention; Fig. 9 It is a schematic diagram of the structure of a feed port of a device and method for extracting carbon sources for a sewage treatment plant from kitchen waste according to the present invention; Fig.10 It is a schematic structural diagram of a material pushing component of a device and method for extracting carbon sources for a sewage treatment plant from kitchen waste according to the present invention; Fig.11 It is a schematic diagram of the crushing knife structure of a device and method for extracting carbon sources for sewage treatment plants from kitchen waste in the present invention.

[0023] In the figure: 100, housing; 11, feed port; 12, filter plate; 13, crushing cylinder; 14, pre-treatment assembly; 141, roller; 142, crushing roller; 143, transmission gear; 144, first drive motor; 15, push assembly; 151, rotating shaft; 152, reciprocating screw rod; 153, synchronous wheel; 154, belt; 155, threaded cylinder; 156, push plate; 157, baffle; 158, cleaning brush; 16, guide groove; 17, pre-treatment box; 18, feed hopper; 19, crushing assembly; 191, second drive motor; 192, bushing; 193, auxiliary crushing unit; 1931, Toothed disc; 1932, mounting rod; 1933, mounting sleeve; 1934, counterweight disc; 1935, crushing paddle; 1936, connecting shaft; 1937, driving gear; 1938, rotor; 1939, track groove; 19391, vertical groove; 19392, spiral groove; 194, first bevel gear; 195, second bevel gear; 196, third bevel gear; 197, crushing knife; 1971, cutting edge; 1972, crushing head; 198, scraper; 199, crushing shaft; 110, filter hole; 200, immersion mixing barrel; 300, screw feeder; 400, dehydration centrifuge; 500, feed pipe. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0025] Example: Figures 1 to 11As shown, the present invention provides a device and method for extracting carbon source for a sewage treatment plant from kitchen waste, comprising a shell 100 and a soaking and stirring barrel 200, a screw feeder 300 and a dehydration centrifuge 400 connected in sequence, a feed opening 11 is provided on the shell 100, a filter plate 12 is fixedly installed in the shell 100 opposite to the feed opening 11, a crushing barrel 13 is fixedly installed between the filter plate 12 and the shell 100, a crushing assembly 19 is arranged in the crushing barrel 13, a pushing assembly 15 is arranged on the filter plate 12, a pretreatment box 17 is fixedly installed in the shell 100 opposite to the feed opening 11, a feed hopper 18 is fixedly installed at the top of the pretreatment box 17, a pretreatment assembly 14 is arranged in the pretreatment box 17, a plurality of filter holes 110 are provided at the bottom of the crushing barrel 13, a material guide groove 16 is fixedly installed in the shell 100, a material delivery pipe 500 is connected in the material guide groove 16 and the material delivery pipe 500 is connected to the soaking and stirring barrel 200; The crushing assembly 19 includes a second drive motor 191 fixedly mounted on the housing 100, a shaft sleeve 192 is rotatably mounted on the housing 100, a crushing shaft 199 is rotatably mounted on the shaft sleeve 192, and the bottom end of the crushing shaft 199 is rotatably connected to the bottom of the crushing barrel 13, an auxiliary crushing unit 193 is provided on the shaft sleeve 192, and a plurality of crushing knives 197 are fixedly mounted on the outer surfaces of the crushing shaft 199 and the shaft sleeve 192, a rotating shaft is rotatably mounted on the housing 100, and one end of the rotating shaft is fixedly connected to the output end of the second drive motor 191, and a first bevel gear 194 is fixedly mounted on the other end of the rotating shaft, the top end of the crushing shaft 199 extends to the outside of the housing 100 and is fixedly mounted with a second bevel gear 195, and a third bevel gear 196 is fixedly mounted on the top end of the shaft sleeve 192, and the second bevel gear 195 and the third bevel gear 196 are symmetrically arranged and both mesh with the first bevel gear 194; The soaking and mixing barrel 200 is used to soak the crushed kitchen waste and to hydrolyze and acidify the crushed kitchen waste; Screw feeder 300: connected to the soaking and stirring barrel 200 and the dehydration centrifuge 400, to convey the solid-liquid mixture after soaking and hydrolysis; Dehydration centrifuge 400: presses and separates the solid-liquid mixture to obtain kitchen waste filtrate and residue.

[0026] Specifically, the food waste to be processed is put into the pre-processing box 17 through the feed hopper 18, and the food waste is pre-crushed by the pre-processing component 14. The pre-crushed food waste falls onto the filter plate 12 through the feed opening 11, and is then pushed into the crushing cylinder 13 through the pushing component 15. The filter plate 12 can screen and filter the pre-crushed food waste, so that the food waste of suitable size falls directly into the guide groove 16 through the filter plate 12, which saves the crushing time and avoids excessive crushing of the food waste. Then, the second driving motor 191 is started to drive the rotation The shaft and the first bevel gear 194 rotate, and the first bevel gear 194 rotates through the third bevel gear 196 to drive the sleeve 192 and the crushing knife 197 on the sleeve 192 to rotate clockwise to crush the material in the crushing barrel 13. When the first bevel gear 194 rotates, it will drive the crushing shaft 199 and the crushing knife 197 on the crushing shaft 199 to rotate counterclockwise through the second bevel gear 195 to crush the material in the crushing barrel 13, thereby further improving the crushing effect of the kitchen waste, achieving better and more complete crushing and saving the time required for crushing.

[0027] Among them, Figure 2 , Figure 3 , Figure 8 and Fig.10 As shown, the pretreatment component 14 includes two rollers 141 rotatably mounted in the pretreatment box 17, the outer surfaces of the two rollers 141 are fixedly mounted with crushing rollers 142, and the two crushing rollers 142 cooperate with each other, and the two rollers 141 are fixedly mounted with transmission gears 143, and the two transmission gears 143 are meshed with each other. A first drive motor 144 is fixedly mounted on the pretreatment box 17, and the output end of the first drive motor 144 is fixedly connected to one of the rollers 141.

[0028] Specifically, the food waste to be processed is put into the pretreatment box 17 through the feed hopper 18, and then the first drive motor 144 is started. The first drive motor 144 drives one of the crushing rollers 142 to rotate, and the rotation of one of the crushing rollers 142 drives the other crushing roller 142 to rotate towards each other through gears. The two crushing rollers 142 rotate towards each other to pre-crush the food waste entering between the two crushing rollers 142. Some larger food waste, such as plant roots and stems, can be crushed to facilitate subsequent crushing operations, thereby improving subsequent crushing efficiency and saving crushing time.

[0029] Among them, Figure 2 , Figure 3 , Figure 8 , Fig. 9 and Fig.10As shown, the pushing assembly 15 includes a rotating shaft 151 rotatably mounted on the shell 100, one end of the rotating shaft 151 extends into the shell 100 and is fixedly mounted with a reciprocating screw 152, the outer surfaces of the rotating shaft 151 and one of the roller shafts 141 are fixedly mounted with a synchronous wheel 153, a belt 154 is sleeved between the two synchronous wheels 153 and is connected through the belt 154, a threaded cylinder 155 is threadedly mounted on one end of the reciprocating screw 152, and a pushing plate 156 is fixedly mounted on one end of the threaded cylinder 155, the pushing plate 156 slides in contact with the upper surface of the filter plate 12, and a baffle 157 for closing and shielding the discharge port 11 is fixedly mounted on the pushing plate 156, and the area of ​​the baffle 157 is larger than the area of ​​the discharge port 11.

[0030] Specifically, the roller 141 rotates while the rotating shaft 151 is driven to rotate through the transmission of the synchronous wheel 153 and the belt 154. The rotation of the rotating shaft 151 drives the reciprocating screw 152 to rotate. The rotation of the reciprocating screw 152 drives the pushing plate 156 to reciprocate, and the kitchen waste falling on the filter plate 12 is pushed into the crushing cylinder 13. The movement of the pushing plate 156 drives the baffle 157 to follow the movement. In detail, when the pushing plate 156 is in the process of pushing the material, it drives the baffle 157 to follow the same direction to block the discharge port 11, so that the kitchen waste in the pre-treatment box 17 cannot fall into the shell 100, so as to avoid the kitchen waste from falling into the shell 100 when the pushing plate 156 pushes the food waste. During the feeding process, the kitchen waste falls onto the pushing plate 156. When the pushing plate 156 is reset, it drives the baffle 157 to follow the movement and the assembly releases the obstruction of the discharge port 11, so that the kitchen waste in the pretreatment box 17 can enter the shell 100, which is convenient for the next pushing operation. The reciprocating motion of the pushing plate 156 can reciprocate the kitchen waste into the pulverizing drum 13 for multiple times, avoiding a large amount of kitchen waste concentrated in the pulverizing drum 13 and affecting the pulverizing effect of the kitchen waste, so that the crushed kitchen waste in the pulverizing drum 13 is discharged through the filter hole 110 in time, avoiding the accumulation of kitchen waste in the pulverizing drum 13.

[0031] Further, such as Figure 3 , Figure 8 , Fig. 9 and Fig.10 As shown, a cavity is defined in the push plate 156 and a cleaning brush 158 is fixedly installed in the cavity, and the brush surface of the cleaning brush 158 fits with the upper surface of the filter plate 12 , and the baffle 157 fits and slides on the upper surface of the inner wall of the shell 100 .

[0032] In detail, the movement of the push plate 156 drives the cleaning brush 158 to move at the same time. The movement of the cleaning brush 158 can clean the filter plate 12 to prevent the kitchen waste on the filter plate 12 from clogging the filter holes, thereby ensuring the filtering effect of the filter plate 12, so that the filter plate 12 can screen and filter the pre-crushed kitchen waste, so that the kitchen waste of suitable size can directly fall into the guide groove 16 through the filter plate 12, thereby saving crushing time and improving crushing efficiency.

[0033] Among them, Figure 5 and Fig.11 As shown, a plurality of crushing knives 197 are evenly distributed in an array along the circumference, a cutting edge 1971 is provided on one side of the crushing knife 197, and a crushing head 1972 is fixedly installed on the other side. The crushing knife 197 is arc-shaped, the cutting edge 1971 is arranged on the inner arc surface of the crushing knife 197, and the crushing head 1972 is arranged on the outer arc surface of the crushing knife 197.

[0034] In detail, the clockwise rotation of the crushing knife 197 on the sleeve 192 can enable the crushing head 1972 to crush the kitchen waste, and some larger and harder kitchen waste in the kitchen waste can be crushed by the crushing head 1972 to avoid damage to the cutting edge 1971, thereby increasing the service life of the cutting edge 1971; the counterclockwise rotation of the crushing knife 197 on the crushing shaft 199 can drive the cutting edge 1971 to further crush the kitchen waste, and then process the soft and hard kitchen waste separately, so that the kitchen waste is crushed more fully, which is convenient for subsequent hydrolysis and soaking operations; the shape of the crushing knife 197 is arranged in an arc shape, which can prevent the kitchen waste from accumulating and entangled on the crushing knife 197 when the crushing knife 197 rotates, thereby affecting the crushing operation of the crushing knife 197.

[0035] Among them, Figure 5 As shown, an L-shaped scraper 198 is fixedly installed at the bottom of the crushing shaft 199, and the scraper 198 fits against the inner wall of the crushing cylinder 13. When the crushing shaft 199 rotates, the scraper 198 is driven to move along. The movement of the scraper 198 can timely scrape off the kitchen waste attached to the inner wall and bottom of the crushing cylinder 13, so as to prevent the kitchen waste from accumulating on the inner wall of the crushing cylinder 13 and being unable to be crushed. At the same time, through the rotation of the scraper 198, the crushed kitchen waste can be timely scraped into the material guiding operation through the filter hole 110, and the crushed waste cannot be discharged in time and needs to be crushed again, so that the rotating shaft can continuously and efficiently crush the kitchen waste.

[0036] Among them, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the auxiliary crushing unit 193 includes a toothed disc 1931 fixedly mounted on the shaft sleeve 192, a plurality of mounting rods 1932 are fixedly mounted on the upper surface of the inner wall of the housing 100, a mounting sleeve 1933 is slidably mounted on each mounting rod 1932, a plurality of crushing paddles 1935 are fixedly mounted on the outer surface of the mounting sleeve 1933, and the crushing paddles 1935 are arranged obliquely, and a connecting shaft 1936 is rotatably mounted on the housing 100 on the same side of each mounting rod 1932, and one end of the connecting shaft 1936 is fixedly mounted with a The driving gear 1937 is fixedly connected to the toothed disc 1931. The other end of the connecting shaft 1936 is fixedly mounted with a rotor 1938. The mounting sleeve 1933 is provided with a track groove 1939 used in conjunction with the rotor 1938. The track groove 1939 is composed of a plurality of vertical grooves 19391 and spiral grooves 19392 connected end to end. The connection between each vertical groove 19391 and the spiral groove 19392 adopts a smooth transition. The width of the vertical groove 19391 is greater than the width of the rotor 1938. A counterweight plate 1934 is fixedly mounted on the outer surface of the top of the mounting sleeve 1933 , and a friction pad is fixedly mounted on the outer surface of the rotor 1938 .

[0037] In detail, the rotation of the shaft sleeve 192 drives the toothed disc 1931 to rotate, and the rotation of the toothed disc 1931 drives the connecting shaft 1936 and the rotating shaft to rotate through the driving gear 1937, and the rotor 1938 rotates and rotates in the trajectory groove 1939, driving the mounting sleeve 1933 and the crushing paddle 1935 to move up and down while rotating on the mounting rod 1932, thereby changing the movement trajectory of the crushing paddle 1935. Specifically, when the rotor 1938 rotates in the trajectory groove 1939, it drives the crushing paddle 1935 to rotate and rise at the same time. When the rotor 1938 moves into the vertical groove 19391, the crushing paddle 1935 is driven by its own gravity and the gravity of the counterweight plate 1934 to move downward to reset and enter the next cycle operation, so as to facilitate the full stirring and crushing of the kitchen waste attached to the inner wall and bottom of the crushing barrel 13, with good crushing effect and high crushing efficiency.

[0038] By setting the counterweight plate 1934, the rotor 1938 can be pressed against the inner wall of the spiral groove 19392, thereby increasing the friction between the rotor 1938 and the inner wall of the spiral groove 19392, ensuring that the rotor 1938 can smoothly drive the mounting sleeve 1933 to rise and rotate under the action of the friction force when rotating. The friction between the track groove 1939 and the rotor 1938 can be further increased by setting a friction pad.

[0039] A method for extracting carbon sources for sewage treatment plants from kitchen waste is applied to a device for extracting carbon sources for sewage treatment plants from kitchen waste in the above technical solution, comprising the following steps: S1. Dispersion and crushing: The kitchen waste to be processed is put into the pre-treatment box 17 through the feed hopper 18, and the kitchen waste is pre-crushed by the crushing roller 142. The pre-crushed waste falls onto the filter plate 12 through the feed port 11, and is then pushed into the crushing cylinder 13 through the push plate 156 for crushing to obtain organic slurry of appropriate size; S2, soaking and hydrolysis: the crushed kitchen waste is sent to the soaking and mixing barrel 200 through the feeding pipe 500 for soaking, and the organic slurry is hydrolyzed and acidified to be converted into a carbon source form that is easy to extract, so as to increase the relative abundance of acid fermentation bacteria and promote the hydrolysis of macromolecular organic matter; S3, dehydration and separation: the solid-liquid mixture after soaking, hydrolysis and acidification is transported to the dehydration centrifuge 400 via a screw feeder for dehydration treatment and solid-liquid separation to further purify the carbon source; S4. Purification and post-treatment: Purify the obtained liquid and remove impurities to obtain the carbon source product required by the sewage treatment plant.

[0040] During operation, the food waste to be processed is put into the pre-treatment box 17 through the feed hopper 18, and then the first drive motor 144 is started. The first drive motor 144 drives one of the crushing rollers 142 to rotate, and the rotation of one of the crushing rollers 142 drives the other crushing roller 142 to rotate towards each other through the gear. The two crushing rollers 142 rotate towards each other to perform a pre-crushing operation on the food waste entering between the two crushing rollers 142, and some larger food waste, such as plant roots and stems, can be crushed to facilitate subsequent crushing operations. The pre-crushed food waste falls onto the filter plate 12 through the discharge port 11, and the filter plate 12 can crush the pre-crushed food waste. The garbage is screened and filtered, so that the kitchen waste of appropriate size falls directly into the guide groove 16 through the filter plate 12, so as to avoid excessive crushing of the kitchen waste. When the roller 141 rotates, the rotating shaft 151 is driven to rotate through the transmission of the synchronous wheel 153 and the belt 154. The rotation of the rotating shaft 151 drives the reciprocating screw rod 152 to rotate. The rotation of the reciprocating screw rod 152 drives the push plate 156 to reciprocate, and the kitchen waste falling on the filter plate 12 is pushed into the crushing cylinder 13. The reciprocating motion of the push plate 156 can reciprocate multiple times to put the kitchen waste into the crushing cylinder 13, so as to avoid a large amount of kitchen waste being concentrated in the crushing cylinder 13 and affecting the crushing effect of the kitchen waste. Then, the second drive motor 191 is started to drive the rotating shaft and the first bevel gear 194 to rotate. The first bevel gear 194 rotates and drives the sleeve 192 and the crushing knife 197 on the sleeve 192 to rotate clockwise through the third bevel gear 196. The clockwise rotation of the crushing knife 197 on the sleeve 192 can enable the crushing head 1972 to crush the kitchen waste and crush some larger and harder kitchen waste in the kitchen waste. When the first bevel gear 194 rotates, it will drive the crushing shaft 199 and the crushing knife 197 on the crushing shaft 199 to rotate counterclockwise through the second bevel gear 195. The counterclockwise rotation of the crushing knife 197 on the crushing shaft 199 can drive the cutting edge 1971 to further crush the kitchen waste, thereby processing the soft and hard kitchen waste separately, so that the kitchen waste is crushed more fully. The shaft sleeve 192 rotates while driving the toothed disc 1931 to rotate. The rotation of the toothed disc 1931 drives the connecting shaft 1936 and the rotating shaft to rotate through the driving gear 1937. The rotor 1938 rotates and rotates in the track groove 1939, driving the mounting sleeve 1933 and the crushing paddle 1935 to rotate on the mounting rod 1932 while moving up and down, thereby changing the movement track of the crushing paddle 1935, which is convenient for fully stirring and crushing the kitchen waste attached to the inner wall and bottom of the crushing barrel 13, with good crushing effect and high crushing efficiency. The crushed kitchen waste is fed into the soaking and mixing barrel 200 through the feeding pipe 500 for soaking, and the organic slurry is hydrolyzed and acidified to be converted into a carbon source form that is easy to extract, so as to increase the relative abundance of acid fermentation bacteria. The solid-liquid mixture after soaking, hydrolysis and acidification is transported to the dehydration centrifuge 400 through a spiral feed connection for dehydration treatment to perform solid-liquid separation and further purify the carbon source. The obtained liquid is then purified to remove impurities to obtain the carbon source product required by the sewage treatment plant.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for extracting carbon sources from kitchen waste for a sewage treatment plant, comprising a housing (100) and a soaking and stirring barrel (200), a screw feeder (300) and a dehydration centrifuge (400) connected in sequence, characterized in that: The shell (100) is provided with a material discharge port (11), a filter plate (12) is fixedly installed in the shell (100) opposite to the material discharge port (11), a crushing cylinder (13) is fixedly installed between the filter plate (12) and the shell (100), a crushing assembly (19) is arranged in the crushing cylinder (13), a pushing assembly (15) is arranged on the filter plate (12), and a pre-pressing assembly (15) is fixedly installed in the shell (100) opposite to the material discharge port (11). A processing box (17), a feed hopper (18) is fixedly mounted on the top of the pre-processing box (17), a pre-processing assembly (14) is arranged in the pre-processing box (17), a plurality of filter holes (110) are opened at the bottom of the crushing cylinder (13), a material guide groove (16) is fixedly mounted in the shell (100), a material delivery pipe (500) is connected in the material guide groove (16) and is connected to the immersion stirring barrel (200) through the material delivery pipe (500).

2. The device for extracting carbon source from kitchen waste for sewage treatment plants according to claim 1, characterized in that: The crushing assembly (19) comprises a second drive motor (191) fixedly mounted on a housing (100); a shaft sleeve (192) is rotatably mounted on the housing (100); a crushing shaft (199) is rotatably mounted on the shaft sleeve (192); the bottom end of the crushing shaft (199) is rotatably connected to the bottom of a crushing barrel (13); an auxiliary crushing unit (193) is arranged on the shaft sleeve (192); a plurality of crushing knives (197) are fixedly mounted on the outer surfaces of the crushing shaft (199) and the shaft sleeve (192); A rotating shaft is rotatably mounted on the housing (100) and one end of the rotating shaft is fixedly connected to the output end of the second drive motor (191); a first bevel gear (194) is fixedly mounted on the other end of the rotating shaft; a top end of the crushing shaft (199) extends outside the housing (100) and is fixedly mounted with a second bevel gear (195); a top end of the shaft sleeve (192) is fixedly mounted with a third bevel gear (196); the second bevel gear (195) and the third bevel gear (196) are symmetrically arranged and both mesh with the first bevel gear (194); The pretreatment component (14) comprises two rollers (141) rotatably mounted in a pretreatment box (17); crushing rollers (142) are fixedly mounted on the outer surfaces of the two rollers (141); the two crushing rollers (142) cooperate with each other; transmission gears (143) are fixedly mounted on the two rollers (141); the two transmission gears (143) mesh with each other; a first drive motor (144) is fixedly mounted on the pretreatment box (17); and an output end of the first drive motor (144) is fixedly connected to one of the rollers (141).

3. The device for extracting carbon source for sewage treatment plant from kitchen waste according to claim 2, characterized in that: The pusher assembly (15) comprises a rotating shaft (151) rotatably mounted on a housing (100), one end of the rotating shaft (151) extending into the housing (100) and fixedly mounted with a reciprocating screw (152), the outer surfaces of the rotating shaft (151) and one of the roller shafts (141) are both fixedly mounted with a synchronous wheel (153), a belt (154) is sleeved between the two synchronous wheels (153) and the two synchronous wheels (153) are connected by transmission via the belt (154), a threaded barrel (155) is threadedly mounted on one end of the reciprocating screw (152), and a pusher plate (156) is fixedly mounted on one end of the threaded barrel (155), the pusher plate (156) is fitted and slidably mounted on the upper surface of the filter plate (12), and a baffle (157) for closing and shielding the discharge port (11) is fixedly mounted on the pusher plate (156), the area of ​​the baffle (157) being larger than the area of ​​the discharge port (11).

4. The device for extracting carbon source from kitchen waste for sewage treatment plants according to claim 3, characterized in that: The push plate (156) has a cavity in it and a cleaning brush (158) is fixedly installed in the cavity, and the brush surface of the cleaning brush (158) fits the upper surface of the filter plate (12), and the baffle (157) fits and slides on the upper surface of the inner wall of the shell (100).

5. The device for extracting carbon source for sewage treatment plant from kitchen waste according to claim 2, characterized in that: A plurality of crushing knives (197) are evenly distributed in an array along the circumference; a cutting edge (1971) is provided on one side of the crushing knife (197) and a crushing head (1972) is fixedly installed on the other side; the crushing knife (197) is arc-shaped; the cutting edge (1971) is arranged on the inner arc surface of the crushing knife (197) and the crushing head (1972) is arranged on the outer arc surface of the crushing knife (197).

6. The device for extracting carbon source for sewage treatment plant from kitchen waste according to claim 5, characterized in that: An L-shaped scraper (198) is fixedly mounted on the bottom of the crushing shaft (199), and the scraper (198) fits against the inner wall of the crushing cylinder (13).

7. The device for extracting carbon source for sewage treatment plant from kitchen waste according to claim 6, characterized in that: The auxiliary crushing unit (193) comprises a toothed disc (1931) fixedly mounted on a shaft sleeve (192); a plurality of mounting rods (1932) are fixedly mounted on the upper surface of the inner wall of the housing (100); a mounting sleeve (1933) is slidably mounted on each mounting rod (1932); a plurality of crushing paddles (1935) are fixedly mounted on the outer surface of the mounting sleeve (1933); the crushing paddles (1935) are arranged obliquely; a connecting shaft (1936) is rotatably mounted on the housing (100) on the same side of each mounting rod (1932); a driving gear (1937) is fixedly mounted on one end of the connecting shaft (1936); the driving gear (1937) is fixedly connected to the toothed disc (1931); a rotor (1938) is fixedly mounted on the other end of the connecting shaft (1936); and a track groove (1939) for matching the rotor (1938) is provided on the mounting sleeve (1933).

8. The device for extracting carbon source for sewage treatment plant from kitchen waste according to claim 7, characterized in that: The track groove (1939) is composed of a plurality of vertical grooves (19391) and spiral grooves (19392) connected end to end, and a smooth transition is adopted at the connection between each vertical groove (19391) and spiral groove (19392), and the width of the vertical groove (19391) is greater than the width of the rotor (1938).

9. The device for extracting carbon source for sewage treatment plant from kitchen waste according to claim 7, characterized in that: A counterweight plate (1934) is fixedly mounted on the outer surface of the top end of the mounting sleeve (1933), and a friction pad is fixedly mounted on the outer surface of the rotor (1938).

10. A method for extracting carbon source for sewage treatment plant from kitchen waste, applied to the device for extracting carbon source for sewage treatment plant from kitchen waste as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, dispersing and crushing: the kitchen waste to be processed is fed into the pre-processing box (17) through the feed hopper (18), and the kitchen waste is pre-crushed by the crushing roller (142). The pre-crushed waste falls onto the filter plate (12) through the discharge port (11), and is then pushed into the crushing cylinder (13) through the pushing plate (156) for crushing, so as to obtain organic slurry of suitable size; S2, soaking and hydrolysis: the crushed kitchen waste is sent into the soaking and stirring barrel (200) through the feeding pipe (500) for soaking, and the organic slurry is hydrolyzed and acidified to be converted into a carbon source form that is easy to extract, so as to increase the relative abundance of acid fermentation bacteria and promote the hydrolysis of macromolecular organic matter; S3, dehydration and separation: the solid-liquid mixture after soaking, hydrolysis and acidification is transported to a dehydration centrifuge (400) via a screw feeder for dehydration treatment and solid-liquid separation to further purify the carbon source; S4. Purification and post-treatment: Purify the obtained liquid and remove impurities to obtain the carbon source product required by the sewage treatment plant.

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