阅读说明：本技术 一种内返料喷浆造粒机 (Inner return guniting granulator ) 是由 朱书景 谭林 周瑆玥 方源 孙妍晗 谢尚儒 胡贝 徐宇露 闻会 李龙飞 于 2019-10-23 设计创作，主要内容包括：本发明涉及一种内返料喷浆造粒机,包括造粒机转筒,转筒的头部设置有进气口和喷枪,造粒机转筒包括造粒段、干燥段和筛分段,造粒段和干燥段内均设置有抄板和主返料螺旋,干燥段内设置有电热网,电热网通过支架固定在转筒内壁上,筛分段内设置有分级锥和滚筒筛,分级锥为筛网结构且分级锥开口大的一端与干燥段连通,开口小的一端与滚筒筛连通,筛分段内壁上设置有能够将滚筒筛筛分后的细料返回到过渡段中的副返料螺旋。此设备主要用于污水处理厂活性污泥的资源利用,其设备少,效率高,具有减少污泥最终处置量、改良土壤结构、提升土壤肥力、效益高“一减一升一高”的特点,在污泥减量、园林绿化以及农业填肥等方面具有极高的应用价值。(The invention relates to an internal-return guniting granulator which comprises a granulator rotary drum, wherein the head of the rotary drum is provided with an air inlet and a spray gun, the granulator rotary drum comprises a granulation section, a drying section and a screening section, shoveling plates and a main return screw are arranged in the granulation section and the drying section, an electric heating net is arranged in the drying section and is fixed on the inner wall of the rotary drum through a support, a grading cone and a rotary screen are arranged in the screening section, the grading cone is of a screen mesh structure, one end with a large opening of the grading cone is communicated with the drying section, the other end with a small opening of the grading cone is communicated with the rotary screen, and an auxiliary return screw capable of returning fine materials screened by the rotary screen to a transition. The equipment is mainly used for resource utilization of activated sludge in sewage treatment plants, has the characteristics of less equipment and high efficiency, reduces the final sludge treatment amount, improves the soil structure, improves the soil fertility, has high benefits, and has extremely high application value in the aspects of sludge reduction, landscaping, agricultural fertilizer filling and the like.)

1. An internal-return guniting granulator comprises a granulator rotary drum (1), wherein the head of the rotary drum (1) is provided with an air inlet (2) and a spray gun (3), characterized in that the granulator rotary drum (1) comprises a granulation section, a drying section and a screening section, a shoveling plate (5) and a main material returning spiral (4) are arranged in the granulating section and the drying section, an electric heating net (12) is arranged in the drying section, the electric heating net (12) is fixed on the inner wall of the rotary drum (1) through a bracket, a grading cone (6) and a rotary screen (7) are arranged in the screening section, the grading cone (6) is of a screen mesh structure, one end of the grading cone (6) with a large opening is communicated with the drying section, the other end of the grading cone with a small opening is communicated with the rotary screen (7), and an auxiliary material returning spiral (4' 1) capable of returning fine materials screened by the drum screen (7) to the transition section is arranged on the inner wall of the screening section.

2. An internal return guniting granulator according to claim 1, further comprising a crusher (9), wherein the crusher (9) is connected with the discharge port of the trommel (7) in the screen section of the rotary drum (1) through a tail lifting bucket.

3. An internal-return guniting granulator according to claim 2, wherein an air outlet box (8) is further arranged at the tail of the rotating drum (1), the air outlet box (8) is sleeved at the tail of the rotating drum (1), and the rotating drum (1) can rotate relative to the air outlet box (8).

4. An internal return guniting granulator according to claim 3, wherein the tail lift hopper and the crusher (9) are fixedly arranged on the outlet box.

5. An internal-return guniting granulator according to claim 3, characterized in that the bottom of the air outlet box (8) is further provided with a discharge port (10) for discharging viscous slurry in the cylinder.

6. An internal return material slurry-spraying granulator according to claim 1, characterized in that the feeding ports of the main return material screw (4) and the auxiliary return material screw (4' 1) are of triangular or inverted trapezoidal structure.

7. An internal-return guniting granulator according to claim 1, wherein a transition section is further arranged between the drying section and the screening section, the transition section is a smooth-wall internal rotating cylinder (1' 1), and one end of the grading cone (6) with a large opening is fixedly connected to the tail of the transition section.

8. An internal return guniting granulator according to claim 1, characterized in that the tail of the rotating drum (1) is arranged to be inclined downwards, and the angle of inclination of the rotating drum (1) is 1-2 °.

9. An internal-return guniting granulator according to claim 1, characterized in that a spray cleaning device (11) is further provided in the rotating drum (1).

Technical Field

The invention relates to an internal-return guniting granulator, in particular to a granulator for recycling sludge.

Background

At present, the spraying granulation equipment mainly comprises a disc granulator, a centrifugal granulator, a horizontal cylinder granulator and the like, and the function is single, so that the granulation work can be finished only. If the whole process of granulation, drying, internal material returning and crushing needs other equipment to assist and form a process system, the process can be completed, so that the one-time investment is large, the equipment is more, the occupied area is large, and the energy consumption is overlarge.

Disclosure of Invention

The invention aims to provide an internal-return guniting granulator to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an interior returning charge guniting granulator, includes the granulator rotary drum, the head of rotary drum is provided with air inlet and spray gun, the granulator rotary drum includes granulation section, drying section and sieve segmentation, all be provided with flight and main returning charge spiral in granulation section and the drying section, be provided with the electric heat net in the drying section, the electric heat net passes through the support to be fixed on the rotary drum inner wall, be provided with hierarchical awl and drum sieve in the sieve segmentation, hierarchical awl is screen cloth structure and the big one end of hierarchical awl opening and drying section intercommunication, the little one end of opening and drum sieve intercommunication, be provided with on the screening section inner wall and return the vice returning charge spiral in the changeover portion with the thin material after the drum sieve screening.

As a preferred embodiment of the invention, a crusher is further included, which is connected to the discharge opening of the trommel in the screen section of the drum by means of a tail lift bucket.

In a preferred embodiment of the present invention, the tail of the rotating drum is further provided with an air outlet box, the air outlet box is sleeved at the tail of the rotating drum, and the rotating drum can rotate relative to the air outlet box.

In a preferred embodiment of the invention, the tail lift bucket and the crusher are fixedly arranged on the air outlet box body.

In a preferred embodiment of the present invention, the bottom of the gas outlet box is further provided with a discharge port for discharging the viscous slurry in the cylinder.

As a preferred embodiment of the present invention, the feeding ports of the main material returning screw and the auxiliary material returning screw are in a triangular or inverted trapezoidal structure.

In a preferred embodiment of the present invention, a transition section is further disposed between the drying section and the screening section, the transition section is a smooth-walled inner drum, and the end of the grading cone with the larger opening is fixedly connected to the tail of the transition section.

In a preferred embodiment of the invention, the tail of the drum is inclined downwards, and the inclination angle of the drum is 1-2 degrees.

In a preferred embodiment of the present invention, a spray cleaning device is further disposed in the rotating drum.

Compared with the prior art, the invention has the beneficial effects that:

the device integrates the procedures of granulation, drying, crushing and material returning, and has better improvement on the aspects of reducing investment, occupying area, energy consumption and the like; meanwhile, in the equipment, a section of light cylinder is arranged in the rotary cylinder, and pre-classification is realized by virtue of the segregation effect of the light cylinder and the classification cone; the main material returning spiral is arranged in the rotary drum to return most of fine particles to the head of the rotary drum, other materials enter the tail rotary drum screen to be classified, undersize materials (fine particles with the diameter below 10 mm) are returned to the main material returning spiral by the auxiliary material returning spiral and then returned to the head of the rotary drum, oversize materials (coarse particles with the diameter above 15 mm) are conveyed to the crusher on the upper part of the gas outlet box by the tail lifting bucket to be crushed, the crushed materials are returned to the head of the rotary drum to be granulated again, intermediate materials (particles with the diameter of 10-15 mm) are qualified products, the intermediate materials are directly discharged out of the rotary drum to enter a packaging process, and therefore the advantages of full internal material returning, low energy consumption, high efficiency and few equipment are.

The equipment is mainly used for resource utilization of activated sludge in sewage treatment plants, has the characteristics of less equipment and high efficiency, reduces the final sludge treatment amount, improves the soil structure, improves the soil fertility, has high benefits, and has extremely high application value in the aspects of sludge reduction, landscaping, agricultural fertilizer filling and the like.

Drawings

FIG. 1 is a schematic structural diagram of an internal-return guniting granulator provided by the invention;

in the drawings, the list of parts represented by the various reference numerals is as follows:

1. the device comprises a rotary drum, 2, an air inlet, 3, a spray gun, 4, a main material returning spiral, 5, a shoveling plate, 6, a grading cone, 7, a rotary screen, 8, an air outlet box, 9, a crusher, 10, a discharge port, 11, a spraying and cleaning device, 12, an electric heating net, 1 ', 1, a smooth wall inner rotary drum, 4', 1 and an auxiliary material returning spiral.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1, an internal-return guniting granulator comprises a granulator rotary drum 1, wherein the head of the rotary drum 1 is provided with an air inlet 2 and a spray gun 3, the granulator rotary drum 1 comprises a granulation section, a drying section and a screening section, a shoveling plate 5 and a main return screw 4 are arranged in the granulation section and the drying section, an electric heating net 12 is arranged in the drying section, a grading cone 6 and a rotary screen 7 are arranged in the screening section, the grading cone 6 is of a screen structure, one end with a large opening of the grading cone 6 is communicated with the drying section, one end with a small opening is communicated with the rotary screen 7, and an auxiliary return screw 4' 1 capable of returning fine materials screened by the rotary screen 7 to a transition section is arranged on the inner wall of the screening.

In this embodiment, the granulator further includes a crusher 9, the crusher 9 is connected with a discharge port of the drum screen in the screen section of the drum 1 through a tail elevator bucket, the fine rejected materials after being screened fall down and return to the granulation section again through the auxiliary material returning screw 4' 1 and the main material returning screw 4 for granulation, and the rejected materials with large particles after being screened enter the crusher 9 through the elevator bucket for crushing and return to the granulation section again for re-granulation.

In this embodiment, an air outlet box 8 is further disposed at the tail of the rotating cylinder 1, the air outlet box 8 is sleeved at the tail of the rotating cylinder 1, and the rotating cylinder 1 can rotate relative to the air outlet box 8. The air outlet box 8 can be set to be a box structure with an opening on one side, and the rotary drum 1 extends into the air outlet box 8 and can rotate relative to the air outlet box 8.

The tail lifting bucket and the crusher 9 are respectively fixedly arranged on the inner wall of the air outlet box 8 through a bracket.

In this embodiment, a discharge port 10 for discharging the viscous slurry in the cylinder is further provided at the bottom of the gas outlet box 8.

In this embodiment, the feed inlets of the main material returning screw 4 and the auxiliary material returning screw 4' 1 are in a triangular or inverted trapezoidal structure.

In this embodiment, a transition section is further provided between the drying section and the screening section, the transition section is a smooth-wall inner rotating cylinder 1' 1, and the large-opening end of the grading cone 6 is fixedly connected to the tail of the transition section.

In the embodiment, the tail part of the rotating drum 1 is arranged in a downward inclination mode, and the inclination angle of the rotating drum 1 is 1-2 degrees.

In this embodiment, a spray cleaning device 11 is further disposed in the rotary drum 1, and the spray cleaning device is a spray pipe with a spray head.

The invention relates to an internal-return guniting granulator which comprises a granulator rotary drum 1, an air inlet 2 arranged at the head of the rotary drum, a spray gun 3 arranged at the head of the rotary drum, a main return screw 4 arranged on the inner wall of the rotary drum, a shoveling plate 5 arranged on the inner wall of the rotary drum, a grading cone 6 arranged at the tail of the rotary drum, a rotary screen 7 connected with the grading cone, an air outlet box 8 connected with the rotary screen, a crusher 9 arranged on the air outlet box, a discharge outlet 10 connected with the lower part of the air outlet box, an in-drum spraying cleaning device 11, an electric heating net 12, an auxiliary return screw 4' 1 arranged around the rotary screen, and a control unit arranged at the outer side of the head of the rotary.

The initial material is sprayed into the drum through a spray gun in the head drum of the guniting granulator, slurry particles rotate in the drum to collide, adhere and form balls, the particles are driven by a shoveling plate to enter a drying section, the particles are gradually dried under the action of an electric heating net and blown air, and when sludge particles separated from the shoveling plate area flow through the smooth wall drum section, particle size segregation occurs to form a particle size distribution pattern of 'fine and coarse periphery'. In the material returning area of the spiral feeding hole, the speed difference exists between the feeding hole of the spiral channel and the particles, and the speed difference and the particle size segregation together enable fine-grained sludge particles to enter the main material returning spiral channel and move to the machine head from the machine tail through the material returning spiral channel, so that particle size grading and material returning are realized. After the granules flowing out of the small end of the cone are subjected to supplementary classification by a fine cylinder sieve, fine particles mixed in a coarse fraction, namely powder with the particle size of less than 10mm, are converged into the main spiral channel from the auxiliary spiral channel; the rest coarse fraction powder flows into a coarse screen, unqualified large particles separated by the coarse screen, namely powder with the particle size larger than 15mm, enter a small crusher, are crushed and then flow into an auxiliary spiral channel through a special channel, and finally enter a granulation section; and (4) roughly screening and separating qualified particles of 10-15mm to obtain the product.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.