CN116251824A - Vertical steam rotary wet-heat hydrolysis device - Google Patents

Abstract

The invention discloses a vertical steam rotary wet heat hydrolysis device, which belongs to the technical field of oil-water separation equipment. It includes a humid heat tank body, a slurry inlet, a slurry outlet, a sand discharge pipe and a heat tracing coil. The top center of the damp heat tank body is vertically installed with a fixed rotary steam stirring device, and the fixed rotary steam stirring device includes A steam main pipe, a steam injection pipe, a driving device and a support member, the steam main pipe is a hollow structure, one end of the steam main pipe is fixedly connected with the output shaft of the driving device, and communicated with a direct steam injection inlet. The invention integrates the functions of the traditional mixer and the steam direct injection pipe efficiently, and has a high degree of equipment centralization, and combines the multiple heating methods of "steam tracing + hot water mixing + steam direct injection" to take into account heat exchange efficiency and steam consumption The amount and increase of slurry can comprehensively improve the performance of the wet thermal hydrolysis system, and improve the overall economic efficiency from multiple angles.

Description

A vertical steam rotary wet heat hydrolysis device

technical field

The invention relates to a vertical steam rotary wet heat hydrolysis device, which belongs to the technical field of oil-water separation equipment.

Background technique

"Wet thermal hydrolysis + anaerobic biogas production" is the current mainstream treatment process for kitchen waste. Due to the high viscosity of kitchen slurry, easy acidification, and poor solid-liquid separation performance, the treatment effect of wet thermal hydrolysis will directly affect the bioavailability and slurry improvement. Oil efficiency and back-end anaerobic fermentation gas production efficiency. The common wet heat hydrolysis device usually arranges a stirrer in the center of the wet heat tank, and uses steam as a heat source to heat the kitchen slurry. According to different heating methods, it can be divided into direct heating type and indirect heating type. The direct heating type humid heat tank is equipped with direct steam injection pipes along the side wall of the tank (avoiding the central agitator blades) to directly feed the steam, and the heat exchange efficiency is relatively high, but the steam will increase the amount of slurry and affect the rear end Process processing load; the indirect heating type humid heat tank is equipped with a coil or a double-layer shell around the tank body. Heating the slurry through indirect heat exchange will not increase the amount of slurry, but its heat exchange efficiency is low and the treatment time is long. The production equipment occupies a large area and the investment cost is high.

In order to further improve bioavailability and wet thermal hydrolysis efficiency, and improve the solid-liquid and oil-water separation characteristics of kitchen slurry, it is necessary to develop a wet thermal hydrolysis device with high heat exchange efficiency, high equipment centralization, and low steam consumption.

Contents of the invention

The present invention is aimed at the technical problem mentioned in above-mentioned background technology, and adopts following technical scheme to realize:

A vertical steam rotary wet heat hydrolysis device, including a wet heat tank body, a slurry inlet, a slurry outlet, a sand discharge pipe and a heat tracing coil, a fixed rotary steam stirring device is vertically installed at the center of the top of the wet heat tank body, The fixed rotary steam stirring device includes a steam main pipe, a steam spray pipe, a driving device and a support member, the steam main pipe is a hollow structure, one end of the steam main pipe is fixedly connected with the output shaft of the driving device, and communicates with There is a direct steam injection inlet, the other end of the steam main pipe extends into the body of the damp heat tank, and is connected to the body of the damp heat tank through a support member in rotation, and the steam nozzles are equidistantly arranged on the steam main pipe. There are several horizontal spray holes on both sides of the tube.

As a preferred example, the steam spray pipe is also provided with several strip-shaped blades, which are arranged at 30°~50° to the horizontal spray hole.

As a preferred example, the steam main pipe is also provided with large paddles, and the large paddles are arranged alternately with the steam nozzles.

As a preferred example, the body of the humid heat tank is vertically arranged in an oblong shape, the top of the tank body adopts an elliptical head, and the bottom adopts a conical bottom.

As a preferred example, the heat tracing coil is arranged in a spiral shape, and is separately arranged for steam tracing or hot water mixing.

As a preferred example, the heating coils are arranged in a double helix, and the hot water coils and the steam coils are alternately arranged at intervals.

As a preferred example, the top of the humid heat tank body is provided with a thermometer interface, the middle and lower section is provided with a manhole, and the bottom is provided with a pressure transmitter interface.

As a preferred example, the pressure transmitter interface is located at the connection between the straight section of the humid heat tank body and the cone bottom, and is set at an upward slope of 5°~30°.

As a preferred example, the sand discharge tank is provided with double-layer valves.

As a preferred example, a compressed air jet is provided between the double-layer valves.

The beneficial effects of the present invention are: the present invention efficiently integrates the functions of the traditional mixer and the direct steam injection pipe, and has a high degree of equipment centralization, and combines multiple heating methods of "steam tracing + hot water mixing + steam direct injection" to make overall planning Taking into account the heat exchange efficiency, steam consumption and slurry increase, the performance of the hydrothermal hydrolysis system is comprehensively improved, and the overall economic efficiency is improved from multiple angles.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of the present invention;

Fig. 2 is a schematic diagram of the external structure of the present invention;

Fig. 3 is the structural representation of the section of the steam nozzle;

Fig. 4 is a schematic diagram of the installation structure of the driving device.

In the figure: driving device 1, slurry inlet 2, heating coil 3, thermometer interface 4, steam main pipe 5, large paddle 6, steam nozzle 7, support 8, valve 9, compressed air nozzle 10, exhaust Sand pipe 11, slurry outlet 12, manhole 13, humid heat tank body 14, steam direct injection inlet 15, pressure transmitter interface 16, gear 17.

Implementation

In order to understand the technical means, creative features, objectives and effects of the present invention clearly, the present invention will be further described below in conjunction with specific illustrations.

As shown in Figure 1-4, a vertical steam rotary wet heat hydrolysis device includes a wet heat tank body 14, a fixed rotary steam stirring device, a sand discharge pipe 11, and a heat tracing coil 3, and the center of the top of the wet heat tank body 14 is installed vertically Fixed rotary steam stirring device, sand discharge pipe 11 is set in the center of the bottom, spiral heat tracing coil 3 is arranged on the periphery of the straight section of the damp heat tank body 14, and the damp heat tank body 14 is arranged in an oblong (capsule-shaped) vertical arrangement, and the tank body The top adopts an elliptical head, and the bottom adopts a cone bottom design. The top of the humid heat tank body 14 is provided with a slurry inlet 2, a steam direct injection inlet 15, and a thermometer interface 4; the middle and lower sections reserve a maintenance manhole 13; the bottom is equipped with a slurry outlet 12, Sand discharge pipe 11 outlet, pressure transmitter interface 16.

In one of the embodiments, the heat tracing coil 3 can use steam tracing or hot water mixing heating alone, and the steam coil goes in and out at the bottom; the hot water coil goes in and out at the bottom. In another embodiment, the heating coils 3 are arranged in a double helix, and the hot water coils and the steam coils are alternately arranged at intervals.

In one of the embodiments, the fixed rotary steam stirring device is composed of a steam main pipe 5, a steam spray pipe 7, a motor-reducer driving device 1, a support 8, and an electrical control unit. The steam main pipe 5 is a hollow structure, connected to the motor-reducer driving device 1 through a flange, the other end of the steam main pipe 5 extends into the body 14 of the humid heat tank, and the motor rotation of the driving device 1 drives the steam main pipe 5 to rotate slowly. Specifically, a fixed frame is fixedly connected to the damp heat tank body 14, and the top of the steam main pipe 5 extends directly, and is connected to the steam direct injection inlet 15 through a rotary joint, and at the same time, the steam main pipe 5 is exposed to the part outside the damp heat tank body 14. There is a gear 17, and the motor-reducer driving device 1 is set on the fixed frame, and the steam main pipe 5 is driven to rotate slowly through the meshing of the gear 17, so that it can pass steam without hindrance while rotating; the steam nozzles 7 are equidistant Rotatingly arranged on the steam main pipe 5 and connected by flanges, it is convenient for maintenance and replacement. Both sides of the steam nozzle 7 are respectively provided with several horizontal spray holes 71 and strip blades 72; the horizontal spray holes 71 and the strip blades 72 are designed at 30°~50° to promote the stirring of the slurry. For high-viscosity slurry, the steam main pipe 5 can be additionally equipped with large paddles 6, and the large paddles 6 and the steam nozzles 7 are alternately arranged at intervals to further strengthen the disturbance of the medium and promote the improvement of heat exchange efficiency. The support 8 provided at the bottom is a triangular support structure, which is used to support the steam main pipe 5 and relieve mechanical vibration.

The sand discharge pipe 11 at the bottom is provided with double-layer valve 9 controls, and the upper strata is an electric flapper valve, and the lower floor is a pneumatic flapper valve. It should be noted that a compressed air nozzle 10 is designed in the sand discharge buffer section between the double-sided valves 9, and the compressed air nozzle 10 has an annular multi-spray structure. During operation, the upper electric slide valve is opened, and the slurry enters the sand discharge buffer section for sedimentation. After the preset sand discharge time is reached, the upper electric slide valve is closed and the lower pneumatic slide valve is opened. This structural design is beneficial to the sand discharge at the bottom of the hot and humid tank, greatly reducing the large amount of slurry being carried out during the sand discharge, and the annular multi-spray compressed air nozzle 10 can prevent the sand discharge buffer section from being hardened and blocked.

Furthermore, the pressure transmitter interface 16 is located at the connection between the straight section of the humid heat tank and the cone bottom, and is designed to be inclined upward by 5°~30°, so as to avoid the pressure transmitter being buried by the bottom sand and improve the accuracy and reliability of data measurement .

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments. Without departing from the spirit and scope of the present invention, the present invention also has various changes and improvements, and these changes and improvements all fall into the scope of the claims. within the scope of the present invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A vertical steam rotary wet heat hydrolysis device, including a wet heat tank body (14), a slurry inlet (2), a slurry outlet (12), a sand discharge pipe (11) and a heat tracing coil (3). It is characterized in that: the top center of the humid heat tank body (14) is vertically installed with a fixed rotating steam stirring device, and the fixed rotating steam stirring device includes a steam main pipe (5), a steam spray pipe (7), a driving device ( 1) and a support (8), the steam main pipe (5) is a hollow structure, one end of the steam main pipe (5) is fixedly connected to the output shaft of the drive device (1), and is connected with a direct steam injection inlet (15), the other end of the steam main pipe (5) extends into the damp heat tank body (14), and is rotationally connected with the damp heat tank body (14) through a support (8), the steam spray pipe (7) etc. The distance rotation is arranged on the steam main pipe (5), and several horizontal spray holes (71) are arranged on both sides of the steam spray pipe (7). 2. A vertical steam rotary wet heat hydrolysis device according to claim 1, characterized in that: the steam nozzle (7) is also provided with several strip-shaped blades (72), and the strip-shaped blades (72 ) and the horizontal spray hole are set at 30°~50°. 3. A vertical steam rotary wet heat hydrolysis device according to claim 1, characterized in that: the steam main pipe (5) is also provided with large paddles (6), and the large paddles (6) Alternately spaced with steam nozzles (7). 4. A vertical steam rotary wet heat hydrolysis device according to claim 1, characterized in that: the wet heat tank body (14) is vertically arranged in an oblong shape, the top of the tank body adopts an oval head, and the bottom adopts a Cone bottom setting. 5 . The vertical steam rotary wet heat hydrolysis device according to claim 4 , characterized in that: the heat tracing coil ( 3 ) is arranged in a spiral shape, and is separately set for steam tracing or hot water mixing. 6 . 6 . A vertical steam rotary wet heat hydrolysis device according to claim 4 , characterized in that: the heating coil ( 3 ) is arranged in a double helix, and hot water coils and steam coils are alternately arranged at intervals. 7. A vertical steam rotary wet heat hydrolysis device according to claim 4, characterized in that: the top of the wet heat tank body (14) is provided with a thermometer interface (4), and the middle and lower sections are provided with manholes (13), The bottom is provided with a pressure transmitter interface (16). 8. A vertical steam rotary wet heat hydrolysis device according to claim 7, characterized in that: the pressure transmitter interface (16) is located at the connection between the straight section of the wet heat tank body (14) and the bottom of the cone, and upwards Tilt 5°~30°setting. 9 . The vertical steam rotary wet heat hydrolysis device according to claim 1 , characterized in that: the sand discharge tank ( 11 ) is provided with double-layer valves ( 9 ). 10. A vertical steam rotary wet heat hydrolysis device according to claim 9, characterized in that: a compressed air nozzle (10) is provided between the double-layer valves (9).

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