Deamination device for hydrolyzing livestock and poultry manure

Abstract

The invention discloses a livestock and poultry manure hydrolysis deamination device which comprises a deamination tank body, a rotating shaft is arranged in the center of the interior of the deamination tank body, a plurality of rotating discs and paddle assemblies are fixedly mounted on the rotating shaft, and the rotating discs and the paddle assemblies are arranged at intervals; and a plurality of through holes are formed in the turntable. The paddle assembly comprises a plurality of paddles distributed in the circumferential direction of the rotating shaft at intervals, and the blade faces of the paddles are arranged to be in an arc shape. According to the ammonia nitrogen removal device, the rotating disc is arranged, raw materials below the liquid level can be brought to the position above the liquid level during rotation, the raw materials are stirred by the rotating disc and smeared and attached to the rotating disc, the contact area between the raw materials and gas is increased, the ammonia nitrogen removal efficiency of the raw materials is improved, and meanwhile through holes are formed so that circulation of air stripping gas in the ammonia removal tank body can be guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of livestock and poultry excrement treatment, and in particular relates to a device for deammonification of livestock and poultry excrement by hydrolysis. Background Art

[0002] Livestock and poultry manure is rich in a large amount of usable biological organic matter. Anaerobic fermentation to produce biogas is usually used to treat these livestock and poultry manure at home and abroad, which can achieve harmless treatment of solid waste and obtain green and clean bioenergy at the same time.

[0003] Livestock and poultry manure is rich in organic matter, especially crude protein, which leads to a high ammonia nitrogen content during the anaerobic fermentation of livestock and poultry manure, affecting the stable operation of the anaerobic fermentation system.

[0004] Ways to relieve ammonia inhibition such as adding straw for co-fermentation, deammoniation and recirculation of sludge, adding water to dilute livestock and poultry manure, acclimation of fermentation microorganisms, and pre-deammoniation of livestock and poultry manure have been proposed. However, the seasonality and regionality of straw make it difficult to promote this method of co-fermentation; adding water to dilute livestock and poultry manure will shorten the hydraulic retention time, increase water consumption and sludge treatment costs; measures such as acclimation of fermentation microorganisms and recirculation of sludge deammoniation cannot fundamentally relieve ammonia inhibition.

[0005] Pre-deamination of livestock and poultry manure refers to the hydrolysis of livestock and poultry manure, converting the nitrogen in the protein into ammonium nitrogen and removing it, reducing the ammonia nitrogen content entering the anaerobic fermentation system, and fundamentally eliminating the possible effects of ammonia inhibition.

[0006] In the prior art, in the research on the removal of ammonia nitrogen, it was found that increasing the gas-liquid contact area during the process of blowing off ammonia nitrogen can significantly increase the removal efficiency of ammonia nitrogen. Generally, the internal surface area of ​​the equipment is increased by adding fillers to the equipment to increase the gas-liquid contact area, but this method is only applicable to the treatment of ammonia-containing wastewater. Wastes with high solid content such as livestock and poultry manure can easily cause equipment blockage, making it unable to operate normally. Therefore, in order to achieve the purpose of quickly and efficiently removing ammonia nitrogen from livestock and poultry manure, the present invention starts from the perspective of expanding the surface area of ​​high-solid materials and taking avoiding raw materials clogging the equipment as the starting point, and designs a hydrolysis livestock and poultry manure deammoniation device. Summary of the invention

[0007] The present invention aims at the problems encountered in the treatment of ammonia nitrogen in livestock and poultry manure in the prior art and proposes the following technical solutions:

[0008] The present invention provides a device for deammonification of livestock and poultry manure by hydrolysis, comprising:

[0009] Deamination tank;

[0010] A rotating shaft is arranged at the center of the deamination tank body, and a plurality of rotating discs and blade assemblies are fixedly mounted on the rotating shaft, and the rotating discs and blade assemblies are arranged at intervals;

[0011] The rotating disk is provided with a plurality of through holes.

[0012] As a preferred embodiment of the above technical solution, the blade assembly includes a plurality of blades spaced apart along the circumference of the rotating shaft, and the blade surfaces of the blades are arranged to be arc-shaped.

[0013] As a preferred embodiment of the above technical solution, the blade assembly includes a hoop fixedly mounted on the rotating shaft, a plurality of extension rods are circumferentially spaced on the outer wall of the hoop, and the blade is arranged at the other end of the extension rod.

[0014] As a preferred embodiment of the above technical solution, it also includes a scraper assembly, which is arranged on both sides of the turntable in the direction of entering the liquid surface, and the scraper assembly scrapes off the deaminated raw materials attached to the turntable during the rotation of the turntable.

[0015] As a preferred embodiment of the above technical solution, the scraper assembly includes a scraper and a sleeve. The sleeve is movably mounted on the outside of the rotating shaft and is located between the turntable and the blade assembly. The scraper is fitted on both sides of the turntable. One end of the scraper is fixedly mounted on the inner wall of the deammoniation tank body above the liquid level, and the other end of the scraper is fixedly connected to the sleeve.

[0016] As a preferred embodiment of the above technical solution, it also includes a baffle, which is arranged on both sides of the turntable away from the liquid surface, and the baffle is arranged on the turntable at a position higher than the liquid surface, and the baffle is close to the turntable and matched in a V shape.

[0017] As a preferred embodiment of the above technical solution, the angle between the baffle and the turntable is 15°.

[0018] As a preferred embodiment of the above technical solution, a jacket assembly is provided on the tank wall of the deammoniation tank body, and the jacket assembly includes a jacket cavity, and a heat exchange medium is passed into the jacket cavity.

[0019] As a preferred embodiment of the above technical solution, the deammoniation tank body includes a feed inlet and a discharge port respectively arranged on the tank top and the tank bottom, and an air inlet and an air outlet arranged on the tank walls on both sides.

[0020] The beneficial effects of the present invention are:

[0021] (1) The present invention provides a turntable that can bring the raw materials below the liquid surface to the top of the liquid surface when it rotates. The raw materials are stirred and smeared on and attached to the turntable, thereby increasing the contact area between the raw materials and the gas and improving the ammonia nitrogen removal efficiency of the raw materials. At the same time, the through holes provided can also ensure the circulation of the stripping gas inside the deammoniation tank.

[0022] (2) The present invention provides a paddle assembly, which, during its continuous rotation with the rotating shaft, can, on the one hand, bring the raw materials from the bottom of the tank or a lower position to the surface of the raw materials, while allowing part of the raw materials to remain on the paddles, thereby expanding the surface area of ​​the raw materials, making the contact between the raw materials and the gas more complete, and improving the evaporation efficiency of ammonia in the raw materials; on the other hand, replacing part of the turntable with the paddle assembly can also reduce the gas resistance in the deammonification tank, which is beneficial to the flow of the stripping air; at the same time, the stirring of the paddle assembly can also enhance the heat exchange effect between the raw materials and the tank jacket.

[0023] (3) The present invention provides a scraper assembly, and the scraper scrapes the deaminated raw material before the turntable enters the liquid surface, so that the turntable brings out the non-deaminated raw material from the liquid surface each time, thereby increasing the contact area between the fresh raw material and the stripping gas, forming a continuous raw material cycle, and improving the ammonia nitrogen removal efficiency.

[0024] (4) The present invention provides a baffle to effectively prevent the raw materials brought out of the liquid surface by the turntable from falling back below the liquid surface, thereby improving the adhesion efficiency of the raw materials on the turntable, increasing the contact area between the gas and the raw materials, and improving the removal efficiency of ammonia nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Shown is an overall schematic diagram of a deamination device in an embodiment;

[0026] Figure 2 What is shown is a cross-sectional schematic diagram of a deamination device in an embodiment;

[0027] Figure 3 It shows Figure 2 A schematic diagram of the structure enlargement at point A;

[0028] Figure 4 What is shown is a schematic plan view of the internal structure of the deamination tank in the embodiment;

[0029] Figure 5 What is shown is a three-dimensional schematic diagram of the internal structure of the deamination tank in the embodiment;

[0030] Figure 6 It shows Figure 5 A schematic diagram of the structure at B in FIG.

[0031] Figure 7 What is shown is a cross-sectional schematic diagram of the internal structure of the deamination tank body in the embodiment;

[0032] Figure 8 Shown is a schematic diagram of a turntable in an embodiment;

[0033] Fig. 9 Shown is a schematic diagram of a blade assembly in an embodiment;

[0034] Figure numerals: 10, deammoniation tank body; 11, feed port; 12, discharge port; 13, air inlet; 14, air outlet; 21, jacket assembly; 22, rotating shaft; 30, turntable; 31, through hole; 32, mounting hole; 40, paddle assembly; 41, hoop; 42, extension rod; 43, paddle; 50, scraper assembly; 51, scraper; 52, sleeve; 60, baffle. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0036] Example

[0037] like Figure 1 As shown, Figure 1 What is shown is the overall schematic diagram of the deamination device in the embodiment;

[0038] The device comprises: a deammoniation tank body 10, the deammoniation tank body 10 comprises a feed inlet 11 and a feed outlet 12 respectively arranged on the tank top and the tank bottom, and an air inlet 13 and an air outlet 14 arranged on the tank walls on both sides;

[0039] The feed port 11, the discharge port 12, the air inlet 13 and the air outlet 14 are all connected to the inner cavity of the deammoniation tank body 10; the inner cavity of the deammoniation tank body 10 contains hydrolyzed livestock and poultry manure raw materials, and air is introduced to blow off ammonia nitrogen from the raw materials.

[0040] like Figure 2 , Figure 3 As shown, Figure 2 What is shown is a cross-sectional schematic diagram of a deamination device in an embodiment; Figure 3 It shows Figure 2 A schematic diagram of the structure enlargement at point A;

[0041] A jacket assembly 21 is provided on the tank wall of the deamination tank body 10. The jacket assembly 21 includes a jacket cavity, and a heat exchange medium is introduced into the jacket cavity.

[0042] The heat exchange medium is 50-80°C hot water, and the temperature of the raw materials is increased by heat transfer between the hot water and the raw materials in the tank. Specifically, the deamination tank body 10 is provided with a water inlet and a drain connected to the clamping cavity, and hot water is injected into the clamping cavity through the water inlet and can be discharged from the drain.

[0043] By providing the jacket assembly 21, the temperature of the raw materials in the deammonification tank 10 can be increased, thereby increasing the rate of ammonia nitrogen removal.

[0044] like Figure 2 , Figure 4 As shown, Figure 2 What is shown is a cross-sectional schematic diagram of a deamination device in an embodiment; Figure 4What is shown is a schematic plan view of the internal structure of the deamination tank in the embodiment;

[0045] A rotating shaft 22 is disposed at the center of the deammoniation tank body 10 , and a plurality of rotating disks 30 and blade assemblies 40 are fixedly mounted on the rotating shaft 22 .

[0046] One end of the rotating shaft 22 extends to the outside of the deamination tank body 10 and is connected to the reduction motor. The reduction motor drives the rotating shaft 22 to rotate, so that the rotating shaft 22 drives the rotating disk 30 and the blade assembly 40 to rotate synchronously.

[0047] like Figure 8 As shown, Figure 8 Shown is a schematic diagram of a turntable in an embodiment;

[0048] A through hole 31 and a mounting hole 32 are provided on the turntable 30. The mounting hole 32 is provided at the center of the turntable 30. The rotating shaft 22 is inserted into the mounting hole 32 of the turntable 30. There are multiple through holes 31, which are evenly distributed at other positions of the turntable 30 except the mounting hole 32.

[0049] When the turntable 30 rotates, the raw materials below the liquid surface are brought above the liquid surface. The raw materials are stirred and smeared on and adhered to the turntable 30, which increases the contact area between the raw materials and the stripping gas and improves the deamination efficiency of the raw materials. At the same time, the through holes 31 provided can also ensure the circulation of the stripping gas inside the deamination tank body 10.

[0050] More specifically, the through hole 31 is circular with a diameter of 5-10 cm, and the area of ​​the through hole 31 accounts for 10-30% of the total area of ​​the turntable 30 .

[0051] like Fig. 9 As shown, Fig. 9 Shown is a schematic diagram of a blade assembly in an embodiment;

[0052] The blade assembly 40 includes a hoop 41 , on the outer wall of which a plurality of extension rods 42 are arranged at intervals along the circumferential direction, and a blade 43 is arranged at the other end of the extension rods 42 .

[0053] In this embodiment, the blade surface of the blade 43 is arc-shaped, and the number of blades in each group is set to 3-8. The arc-shaped blades 43 can further increase the contact area between the raw material and the stripping gas;

[0054] As the paddle assembly 40 rotates continuously with the rotating shaft 22, the paddles 43 not only bring the raw materials from the bottom of the tank or a lower position to the surface of the raw materials, but also part of the raw materials remain on the paddles 43, thereby expanding the surface area of ​​the raw materials, making the contact between the raw materials and the gas more complete, and improving the evaporation efficiency of ammonia in the raw materials; on the other hand, replacing part of the turntable with the paddle assembly can also reduce the gas resistance in the deammoniation tank, which is beneficial to the flow of the stripping air; at the same time, the stirring of the paddle assembly strengthens the heat exchange effect between the raw materials and the tank jacket.

[0055] The combined design of the rotating disk 30 and the blade assembly 40 provides two different ways to expand the surface area of ​​the raw material. The rotating disk 30 expands the liquid / gas exchange interface by bringing the raw material above the liquid surface; while the blade assembly 40 increases the contact area between the raw material and the stripping gas by stirring the raw material. These two ways complement each other and greatly improve the evaporation and stripping efficiency of ammonia.

[0056] The interval arrangement of the turntable 30 and the blade assembly 40 reduces the flow resistance of the stripping gas inside the deamination tank 10. This optimized gas flow path helps the gas to fully contact with the raw material and carry more ammonia nitrogen to escape.

[0057] like Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, Figure 4 What is shown is a schematic plan view of the internal structure of the deamination tank in the embodiment; Figure 5 What is shown is a three-dimensional schematic diagram of the internal structure of the deamination tank in the embodiment; Figure 6 It shows Figure 5 Schematic diagram of the enlarged structure at point B in FIG.

[0058] It also includes a scraper assembly 50, which is arranged on both sides of the rotating disk 30 in the direction of entering the liquid surface, and scrapes off the material attached to the rotating disk 30 after the ammonia nitrogen blow-off during the rotation of the rotating disk 30;

[0059] The scraper assembly 50 includes a scraper 51 and a sleeve 52. The sleeve 52 is movably mounted on the outside of the rotating shaft 22 and is located between the turntable 30 and the blade assembly 40. The scraper 51 is fitted on both sides of the turntable 30. One end of the scraper 51 is fixedly mounted on the inner wall of the deammoniation tank body 10 above the raw material liquid level, and the other end is fixedly connected to the sleeve 52.

[0060] The scraper 51 scrapes the deaminated raw material before the turntable 30 enters the liquid surface, so that the turntable 30 takes out the non-deaminated raw material from the liquid surface each time, forming a continuous raw material cycle and improving the processing efficiency.

[0061] It also includes a baffle 60, which is arranged on both sides of the turntable 30 away from the liquid surface. The baffle 60 is arranged on the turntable 30 at a position higher than the liquid surface. The baffle 60 is close to the turntable 30 and is matched in a V shape; the angle between the baffle 60 and the turntable 30 is 15°.

[0062] The setting of the baffle 60 can effectively prevent the raw materials brought out of the liquid surface by the turntable 30 from falling back below the liquid surface, which increases the effective circulation of the raw materials.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A device for deammonification of livestock and poultry manure by hydrolysis, characterized in that: include: Deamination tank (10); A rotating shaft (22) is arranged at the center of the deammoniation tank body (10), and a plurality of rotating disks (30) and blade assemblies (40) are fixedly mounted on the rotating shaft (22), wherein the rotating disks (30) and blade assemblies (40) are arranged at intervals; The rotating disk (30) is provided with a plurality of through holes (31).

2. The device for deammonification of livestock and poultry manure by hydrolysis according to claim 1, characterized in that: The blade assembly (40) comprises a plurality of blades (43) spaced apart and distributed circumferentially along the rotating shaft (22), and the blade surfaces of the blades (43) are arranged in an arc shape.

3. The deammonification device for hydrolyzing livestock and poultry manure according to claim 2 is characterized in that: The blade assembly (40) comprises a hoop (41) fixedly sleeved on the rotating shaft (22), a plurality of extension rods (42) are arranged at intervals along the circumferential direction on the outer wall of the hoop (41), and the blade (43) is arranged at the other end of the extension rod (42).

4. The device for deammonification of livestock and poultry manure by hydrolysis according to claim 1, characterized in that: It also comprises a scraper assembly (50), which is arranged on both sides of the rotating disk (30) in the direction of entering the liquid surface, and the scraper assembly (50) scrapes off the deaminated raw materials attached to the rotating disk (30) during the rotation of the rotating disk (30).

5. The device for deammonification of livestock and poultry manure by hydrolysis according to claim 4, characterized in that: The scraper assembly (50) comprises a scraper (51) and a sleeve (52); the sleeve (52) is movably sleeved outside the rotating shaft (22) and located between the rotating disk (30) and the blade assembly (40); the scraper (51) is closely disposed on both sides of the rotating disk (30); one end of the scraper (51) is fixedly mounted on the inner wall of the deammoniation tank (10) above the liquid level; and the other end of the scraper (51) is fixedly connected to the sleeve (52).

6. The device for deammonification of livestock and poultry manure by hydrolysis according to claim 1, characterized in that: It also includes baffles (60), which are arranged on both sides of the turntable (30) in a direction away from the liquid surface, and the baffles (60) are arranged at a position on the turntable (30) that is higher than the liquid surface, and the baffles (60) are close to the turntable (30) and matched in a V shape.

7. The device for deammonification of livestock and poultry manure by hydrolysis according to claim 6, characterized in that: The included angle between the baffle (60) and the rotating disk (30) is 15°.

8. The device for deammonification of livestock and poultry manure by hydrolysis according to claim 1, characterized in that: A jacket assembly (21) is arranged on the tank wall of the deammoniation tank body (10), and the jacket assembly (21) comprises a jacket cavity, and a heat exchange medium is passed into the jacket cavity.

9. The device for deammonification of livestock and poultry manure by hydrolysis according to claim 1, characterized in that: The deammoniation tank body (10) comprises a feed inlet (11) and a feed outlet (12) respectively arranged on the tank top and the tank bottom, and an air inlet (13) and an air outlet (14) arranged on the tank walls on both sides.

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