CN110950693B

CN110950693B - Production equipment and process for producing organic fertilizer by using sludge

Info

Publication number: CN110950693B
Application number: CN201911298404.2A
Authority: CN
Inventors: 陈磊; 蔡得春
Original assignee: Qingyuan Luyou Environmental Protection Technology Co ltd; Guangzhou Green State Environment Technology Co ltd
Current assignee: Qingyuan Luyou Environmental Protection Technology Co ltd; Guangzhou Green State Environment Technology Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2021-09-17
Anticipated expiration: 2039-12-17
Also published as: CN110950693A

Abstract

The invention discloses production equipment for producing an organic fertilizer by using sludge, which comprises a feeding device, a sludge feeding device and a sludge discharging device, wherein the feeding device is used for feeding the sludge; the sedimentation tank is connected with the feeding device and is used for stirring the sludge raw materials and then carrying out sedimentation; the mixer is connected with the sedimentation tank and is used for adding ingredients into the sludge raw material and uniformly stirring the ingredients; the fermentation device is connected with the mixer and is used for fermenting the mixed raw materials; and the drying device is used for drying the fermented raw materials to obtain the organic fertilizer. The invention can improve the defects of the prior art and improve the efficiency of sludge recycling.

Description

Production equipment and process for producing organic fertilizer by using sludge

Technical Field

The invention relates to the technical field of environmental protection, in particular to production equipment and a process for producing an organic fertilizer by using sludge.

Background

In municipal sewage and industrial waste, a large amount of sludge waste is generated. The waste liquid containing a large amount of organic substances not only causes environmental pollution but also causes waste of a large amount of usable organic substances if the waste liquid is directly discarded. How to efficiently and environmentally utilize sludge to produce organic fertilizer is one of the hot spots of research in the field.

Disclosure of Invention

The invention aims to solve the technical problem of providing production equipment and a production process for producing an organic fertilizer by using sludge, and improving the efficiency of sludge recycling.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows.

A production facility of fertilizer is produced with mud includes:

the feeding device is used for feeding sludge;

the sedimentation tank is connected with the feeding device and is used for stirring the sludge raw materials and then carrying out sedimentation;

the mixer is connected with the sedimentation tank and is used for adding ingredients into the sludge raw material and uniformly stirring the ingredients;

the fermentation device is connected with the mixer and is used for fermenting the mixed raw materials;

and the drying device is used for drying the fermented raw materials to obtain the organic fertilizer.

Preferably, the drying device comprises a machine shell, a first drying cylinder, a granulating disc and a second drying cylinder are sequentially arranged in the machine shell, and the installation positions of the first drying cylinder, the granulating disc and the second drying cylinder are sequentially reduced; a first rotating shaft is horizontally arranged in the first drying cylinder, a plurality of stirring paddles are fixed on the first rotating shaft, heating resistance wires are arranged in the stirring paddles, and a discharge port of the first drying cylinder is positioned above the granulating disc; the granulation disc is installed at the top of the base through a universal joint, the side face of the base is connected with the bottom face of the granulation disc through a plurality of springs uniformly distributed in an annular mode, a notch is formed in the side face of the granulation disc and located above the second drying cylinder, a second rotating shaft is installed above the granulation disc, a plurality of arc-shaped flow deflectors are annularly arranged inside the granulation disc and fixed on the side wall of the second rotating shaft, a plurality of through grooves are formed in the arc-shaped flow deflectors, a plurality of blades are fixed on the inner side wall of the granulation disc, the length of each blade is smaller than the depth of the granulation disc, and the included angle between each blade and the bottom face of the granulation disc is 45 degrees; a third rotating shaft is vertically arranged in the second drying cylinder, and a stirring screen plate is fixed on the third rotating shaft.

Preferably, a dry air inlet is fixed at the top of the second drying cylinder, a dry air outlet is formed in the side wall of the second drying cylinder, a secondary air inlet is formed in the side wall of the first drying cylinder, and the dry air outlet is communicated with the secondary air inlet.

Preferably, the bottom edge of the arc-shaped guide vane is fixed with a rubber strip which is in sliding contact with the granulating disc, the arc-shaped guide vane is in clearance fit with the blade, and the outer side end of the arc-shaped guide vane is provided with a spherical sleeve.

The process of the production equipment for producing the organic fertilizer by using the sludge comprises the following steps:

A. the method comprises the following steps that sludge is input into a sedimentation tank through a feeding device, clear water with the volume being 3-5 times that of the sludge is added into the sedimentation tank, and then the sludge is fully stirred;

B. adding a sludge modifying agent after stirring, dehydrating to obtain a mud cake with the water content of 55%, and crushing to obtain a sludge raw material;

C. adding the sludge raw material into a mixer, and adding ingredients into the mixer; the mixer comprises 60-75 parts of sludge raw materials, 1-2 parts of biological peptide, 4-5 parts of sawdust, 3-5 parts of humic acid and 1 part of anaerobic fermentation bacteria;

D. putting the mixed raw materials into a fermentation device, controlling the fermentation temperature to be 30-35 ℃, controlling the fermentation time to be 4-5 days, and continuously stirring the mixed raw materials in the fermentation process;

E. and (4) putting the fermented mixed raw materials into a drying device for drying to obtain the organic fertilizer.

Preferably, in step D, the pressure in the fermentation apparatus is monitored, and when the pressure exceeds 1.2 times the atmospheric pressure, the pressure is released.

Preferably, in the step E, when the fermented raw material is dried to a water content of 20-25%, the fermented raw material is granulated, and then the granulated fermented raw material is continuously dried until an organic fertilizer with a water content of less than 10% is obtained.

Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: the invention adopts the production process of precipitation, fermentation and drying to realize the continuous large-scale production of the organic fertilizer. Before fermentation, the special mixing treatment is carried out on the sludge, so that the biological activity of fermentation bacteria in the sludge raw material is improved, and the organic matter content of a fermentation product is improved. The drying device provided by the invention realizes the integrated treatment of drying and granulation, and has high production efficiency. In the granulation process, the granulation disc can generate micro-inclination when the material distribution state changes, so that the relative angle between the arc-shaped guide vane and the granulation disc is effectively changed, and the granulation efficiency is improved. The rubber strips on the arc-shaped guide vane can avoid abrasion caused by direct contact of the arc-shaped guide vane and the granulating disc. The organic fertilizer is driven by the arc-shaped guide vanes to rotate at a high speed, and is in high-speed contact with the blades by using centrifugal force, so that cutting is realized. Meanwhile, the organic fertilizer raw materials generate a pulling effect at the through groove on the surface of the arc-shaped flow deflector by using centrifugal force, so that the organic fertilizer raw materials can be rapidly divided into blocks by matching with the blades. The spherical sleeve at the outer end of the arc-shaped guide vane can generate a local low-pressure area when rotating, so that organic fertilizer near the blade is stirred, and the contact cutting efficiency of the organic fertilizer and the blade is improved. According to the invention, the drying air which is reversely conveyed is arranged, so that water vapor in the drying process can be rapidly discharged, and the drying speed is effectively accelerated.

Drawings

FIG. 1 is a block diagram of one embodiment of the present invention.

Fig. 2 is a structural view of a drying apparatus according to an embodiment of the present invention.

Fig. 3 is a structural view of an arc-shaped guide vane according to an embodiment of the present invention.

In the figure: 1. a feeding device; 2. a sedimentation tank; 3. a mixer; 4. a fermentation device; 5. a drying device; 6. a housing; 7. a first drying cylinder; 8. a granulation disc; 9. a second drying cylinder; 10. a first rotating shaft; 11. a stirring paddle; 12. heating resistance wires; 13. a universal joint; 14. a base; 15. a spring; 16. a notch; 17. a second rotating shaft; 18. an arc-shaped flow deflector; 19. a through groove; 20. a blade; 21. a third rotating shaft; 22. stirring the screen plate; 23. a dry air inlet; 24. a dry air outlet; 25. a secondary air inlet; 26. a rubber strip; 27. a spherical sleeve.

Detailed Description

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part adopts the conventional means of mature bolts, rivets, welding, sticking and the like in the prior art, and the detailed description is not repeated.

Referring to fig. 1-3, one embodiment of the present invention includes,

the feeding device 1 is used for feeding sludge;

the sedimentation tank 2 is connected with the feeding device 1 and is used for stirring and then settling the sludge raw materials;

the mixer 3 is connected with the sedimentation tank 2 and is used for adding ingredients into the sludge raw material and uniformly stirring the ingredients;

the fermentation device 4 is connected with the mixer 3 and is used for fermenting the mixed raw materials;

and the drying device 5 is used for drying the fermented raw materials to obtain the organic fertilizer.

The drying device 5 comprises a machine shell 6, a first drying cylinder 7, a granulating disc 8 and a second drying cylinder 9 are sequentially arranged in the machine shell 6, and the installation positions of the first drying cylinder 7, the granulating disc 8 and the second drying cylinder 9 are sequentially reduced; a first rotating shaft 10 is horizontally arranged in the first drying cylinder 7, a plurality of stirring paddles 11 are fixed on the first rotating shaft 10, heating resistance wires 12 are arranged in the stirring paddles 11, and a discharge port of the first drying cylinder 7 is positioned above the granulating disc 8; the granulation disc 8 is installed at the top of the base 14 through the universal joint 13, the side of the base 14 is connected with the bottom surface of the granulation disc 8 through a plurality of annular uniformly-distributed springs 15, a notch 16 is formed in the side of the granulation disc 8, the notch 16 is located above the second drying cylinder 9, a second rotating shaft 17 is installed above the granulation disc 8, a plurality of arc-shaped guide vanes 18 are annularly arranged inside the granulation disc 8, the arc-shaped guide vanes 18 are fixed on the side wall of the second rotating shaft 17, a plurality of through grooves 19 are formed in the arc-shaped guide vanes 18, a plurality of blades 20 are fixed on the inner side wall of the granulation disc 8, the length of each blade 20 is smaller than the depth of the granulation disc 8, and the included angle between each blade 20 and the bottom surface of the granulation disc 8 is 45 degrees; a third rotating shaft 21 is vertically arranged in the second drying cylinder 9, and a stirring screen 22 is fixed on the third rotating shaft 21. A drying air inlet 23 is fixed at the top of the second drying cylinder 9, a drying air outlet 24 is arranged on the side wall of the second drying cylinder 9, a secondary air inlet 25 is arranged on the side wall of the first drying cylinder 7, and the drying air outlet 24 is communicated with the secondary air inlet 25. The bottom edge of the arc-shaped guide vane 18 is fixed with a rubber strip 26 which is in sliding contact with the granulating disc 8, the arc-shaped guide vane 18 is in clearance fit with the blade 20, and the outer side end of the arc-shaped guide vane 18 is provided with a spherical sleeve 27. In the granulation process, the granulation disk 8 can slightly incline when the material distribution state changes, so that the relative angle between the arc-shaped guide vane 18 and the granulation disk 8 is effectively changed, and the granulation efficiency is improved. The rubber strips 26 on the arc-shaped guide vanes 18 can prevent the arc-shaped guide vanes 18 from directly contacting the granulating disk 8 to cause abrasion. Under the driving action of the high-speed rotation of the arc-shaped flow deflector 18, the organic fertilizer is in high-speed contact with the blade 20 by utilizing centrifugal force, so that cutting is realized. Meanwhile, the organic fertilizer raw materials generate a pulling effect at the through groove 19 on the surface of the arc-shaped flow deflector 18 by using centrifugal force, so that the organic fertilizer raw materials can be rapidly divided into blocks by matching with the blades 20. The spherical sleeve 27 at the outer end of the arc-shaped deflector 18 can generate a local low-pressure area when rotating, so that organic fertilizer near the blade 20 is stirred, and the contact cutting efficiency of the organic fertilizer and the blade 20 is improved.

A. the feeding device 1 inputs the sludge into the sedimentation tank 2, then clear water with the volume 5 times of that of the sludge is added into the sedimentation tank 2, and then the mixture is fully stirred;

C. adding the sludge raw material into a mixer 3, and then adding ingredients into the mixer 3; the mixer 3 comprises 75 parts of sludge raw materials, 1 part of biological peptide, 5 parts of sawdust, 4 parts of humic acid and 1 part of anaerobic fermentation bacteria;

D. putting the mixed raw materials into a fermentation device 4, controlling the fermentation temperature to be 34-35 ℃, controlling the fermentation time to be 5 days, and continuously stirring the mixed raw materials in the fermentation process;

E. and (3) putting the fermented mixed raw materials into a drying device 5 for drying to obtain the organic fertilizer.

And D, monitoring the air pressure in the fermentation device 4, and relieving the pressure when the air pressure exceeds 1.2 times of the atmospheric pressure.

And E, drying the fermented raw materials until the water content is 20-25%, granulating the fermented raw materials, and continuously drying the granulated fermented raw materials until the organic fertilizer with the water content lower than 10% is obtained.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a production facility with mud production fertilizer which characterized in that includes:

a feeding device (1) for feeding sludge;

the sedimentation tank (2) is connected with the feeding device (1) and is used for stirring and then settling the sludge raw material;

the mixer (3) is connected with the sedimentation tank (2) and is used for adding ingredients into the sludge raw material and uniformly stirring the ingredients;

the fermentation device (4) is connected with the mixer (3) and is used for fermenting the mixed raw materials;

a drying device (5) for drying the fermented raw materials to obtain organic fertilizer;

the drying device (5) comprises a machine shell (6), a first drying cylinder (7), a granulating disc (8) and a second drying cylinder (9) are sequentially installed in the machine shell (6), and the installation positions of the first drying cylinder (7), the granulating disc (8) and the second drying cylinder (9) are sequentially reduced; a first rotating shaft (10) is horizontally arranged in the first drying cylinder (7), a plurality of stirring paddles (11) are fixed on the first rotating shaft (10), heating resistance wires (12) are arranged in the stirring paddles (11), and a discharge port of the first drying cylinder (7) is positioned above the granulating disc (8); the granulation disc (8) is installed at the top of the base (14) through a universal joint (13), the side face of the base (14) is connected with the bottom face of the granulation disc (8) through a plurality of springs (15) which are uniformly distributed in an annular mode, a notch (16) is formed in the side face of the granulation disc (8), the notch (16) is located above the second drying cylinder (9), a second rotating shaft (17) is installed above the granulation disc (8), a plurality of arc-shaped flow deflectors (18) are annularly arranged inside the granulation disc (8), the arc-shaped flow deflectors (18) are fixed on the side wall of the second rotating shaft (17), a plurality of through grooves (19) are formed in the arc-shaped flow deflectors (18), a plurality of blades (20) are fixed on the inner side wall of the granulation disc (8), the lengths of the blades (20) are smaller than the depth of the granulation disc (8), and the included angles between the blades (20) and the bottom face of the granulation disc (8) are 45 degrees; a third rotating shaft (21) is vertically arranged in the second drying cylinder (9), and a stirring screen plate (22) is fixed on the third rotating shaft (21).

2. The production equipment for producing the organic fertilizer by using the sludge as claimed in claim 1, which is characterized in that: a dry air inlet (23) is fixed to the top of the second drying cylinder (9), a dry air outlet (24) is formed in the side wall of the second drying cylinder (9), a secondary air inlet (25) is formed in the side wall of the first drying cylinder (7), and the dry air outlet (24) is communicated with the secondary air inlet (25).

3. The production equipment for producing the organic fertilizer by using the sludge as claimed in claim 2, which is characterized in that: rubber strips (26) in sliding contact with the granulating disc (8) are fixed on the bottom edge of the arc-shaped flow deflector (18), the arc-shaped flow deflector (18) is in clearance fit with the blades (20), and a spherical sleeve (27) is arranged at the outer side end of the arc-shaped flow deflector (18).

4. A process of a production facility for producing organic fertilizer from sludge as claimed in any one of claims 1 to 3, characterized by comprising the steps of:

A. the method comprises the following steps that sludge is input into a sedimentation tank (2) through a feeding device (1), clear water with the volume being 3-5 times that of the sludge is added into the sedimentation tank (2), and then the mixture is fully stirred;

C. adding the sludge raw material into a mixer (3), and then adding ingredients into the mixer (3); the mixer (3) comprises 60-75 parts of sludge raw materials, 1-2 parts of biological peptides, 4-5 parts of sawdust, 3-5 parts of humic acid and 1 part of anaerobic fermentation bacteria;

D. putting the mixed raw materials into a fermentation device (4), controlling the fermentation temperature at 30-35 ℃, controlling the fermentation time at 4-5 days, and continuously stirring the mixed raw materials in the fermentation process;

E. and (3) putting the fermented mixed raw materials into a drying device (5) for drying to obtain the organic fertilizer.

5. The process of the production equipment for producing the organic fertilizer by using the sludge as claimed in claim 4, which is characterized in that: and D, monitoring the air pressure in the fermentation device (4), and relieving the pressure when the air pressure exceeds 1.2 times of the atmospheric pressure.

6. The process of the production equipment for producing the organic fertilizer by using the sludge as claimed in claim 5, which is characterized in that: and E, drying the fermented raw materials until the water content is 20-25%, granulating the fermented raw materials, and continuously drying the granulated fermented raw materials until the organic fertilizer with the water content lower than 10% is obtained.