CN218764636U

CN218764636U - Three-pass structure roasting kiln

Info

Publication number: CN218764636U
Application number: CN202223299092.7U
Authority: CN
Inventors: 左其武
Original assignee: Jiangsu ABition Environmental Equipment Co ltd
Current assignee: Jiangsu ABition Environmental Equipment Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-03-28
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses a three return stroke structure roasting kilns, three return stroke structure roasting kilns comprise hot-blast kiln and revolving drum, and the revolving drum divide into the tertiary, is first revolving drum, second revolving drum, third revolving drum respectively, and establishes ties each other, and the material removes in tertiary revolving drum, and hot-blast kiln provides heat energy and carries out pyrolysis calcination to the material in the revolving drum. The moving direction of the materials is opposite to that of the hot air, and a counter flow is formed, so that the materials are fully pyrolyzed. The three-pass structure roasting kiln is compact in whole, small in occupied area, novel in structure and low in equipment cost.

Description

Three-pass structure roasting kiln

Technical Field

The utility model relates to a rubber powder pyrolysis rotary furnace field especially relates to a roasting kiln of three return stroke structures.

Background

At present, all the rubber powder high-temperature cracking furnaces which are used in China are integrated rotary furnaces which are all designed into a single cylinder, so that the equipment is long in total length and large in occupied area. And what the integral type rotary furnace adopted is that the furnace body wholly rotates, and then drives the material and turn, and this kind of mode of turning makes the material can not be whole even with hot-blast contact, and hot-blast passing through from the material surface more, this makes the material be heated inhomogeneous, leads to the pyrolysis insufficient, produces impurity many. Some rotary furnaces adopt integral heating, the design needs to heat the whole barrel, the barrel and the inner space of the barrel are both in a high-temperature state, the problem that hot air only heats the surface of a material is solved, but the material turning mode is not changed, the material is easy to agglomerate and roll, the heating is uneven, the pyrolysis is insufficient, and the equipment cost is relatively high. The utility model discloses corresponding improvement has been made to above problem. So as to improve the production efficiency, save the cost and reduce the occupied space.

Disclosure of Invention

The utility model aims to solve the problem that to the shortcoming among the above-mentioned prior art, put forward improvement scheme or alternative, especially one kind has that area is little, the transformation is with low costs, the efficient improvement of pyrolysis or alternative.

In order to solve the above problem, the utility model discloses a scheme as follows: a three-pass structure roasting kiln is characterized by comprising a hot air kiln, a first rotary cylinder, a second rotary cylinder, a third rotary cylinder, a first motor, a second motor and a third motor; a first spiral plate in the first rotary cylinder is connected with a first motor, a second spiral plate in the second rotary cylinder is connected with a second motor, and a third spiral plate in the third rotary cylinder is connected with a third motor; the first rotary cylinder, the second rotary cylinder and the third rotary cylinder are arranged in the hot air kiln; the first rotary cylinder and the third rotary cylinder are respectively communicated with the second rotary cylinder through material transfer pipes, the first rotary cylinder is provided with a feed port, and the third rotary cylinder is provided with a discharge port; and a hot air inlet and a tail gas outlet are respectively arranged on the diagonal line of the hot air kiln.

Further, the three-pass structure roasting kiln is characterized in that the first rotary drum, the second rotary drum and the third rotary drum are arranged from top to bottom in sequence; and an upward pyrolysis gas outlet is formed in the tail part of the first rotary drum.

Further, the three-pass structure roasting kiln is characterized in that a return hot air channel is formed in the hot air kiln through baffles which are arranged in a staggered mode, a hot air inlet and a tail gas outlet are respectively located at two ends of the hot air channel, and the hot air inlet is located at the upper portion of the lower tail gas outlet.

Further, the three-pass structure roasting kiln is characterized in that the material transfer pipe is provided with an access hole.

The return stroke structure roasting kiln comprises hot air kiln and a rotary drum, the rotary drum is divided into three stages, namely a first rotary drum, a second rotary drum and a third rotary drum which are connected in series, the material moves in the three stages of rotary drums, and the hot air kiln provides heat energy to carry out pyrolysis roasting on the material in the rotary drums. The moving direction of the materials is opposite to that of the hot air, and a counter flow is formed, so that the materials are fully pyrolyzed. And an independent pyrolysis gas outlet is further arranged on the first rotary drum positioned on the uppermost layer, and the pyrolysis gas outlet is arranged above the communication position of the first rotary drum and the second rotary drum, so that the pyrolysis gas collection and the material feeding are facilitated.

Further, the three-pass structure roasting kiln is characterized in that the first spiral plate, the second spiral plate and the third spiral plate are respectively provided with a small material plate perpendicular to the rotating shaft, and the small material plates are used for turning over materials while pushing the materials.

The technical effects of the utility model are as follows: the three-pass structure roasting kiln of the application divides the roasting process into three stages, and is realized through a first rotary drum, a second rotary drum and a third rotary drum respectively, the first rotary drum, the second rotary drum and the third rotary drum are sequentially arranged in the hot air kiln from top to bottom, the hot air kiln supplies heat from the bottom, and materials enter from the first rotary drum (namely enter from the top) and form countercurrent with hot air. The hot air inlet and the tail gas outlet on the hot air kiln are arranged diagonally on the hot air kiln, the baffle plate arranged in the hot air kiln is matched, hot air is enabled to sequentially pass through all cavities of the hot air kiln, the existence of local low temperature is avoided, meanwhile, the hot air inlet and the material discharge port are located at the same position, the tail gas outlet and the material feed port are located at the same position, and material and hot air convection is formed. The tail part of the first rotary drum is provided with a pyrolysis gas outlet above the joint of the first rotary drum and the second rotary drum for collecting pyrolysis gas, the first rotary drum belongs to a preheating stage, thermal cracking mainly occurs in the second rotary drum and the third rotary drum, and the tail part of the first rotary drum is provided with the pyrolysis gas outlet capable of collecting 99% of the pyrolysis gas.

The utility model provides a three return stroke structure roasting kiln novel structure adopts spiral propelling movement material to let the material turn that does not stop, and contact hot-blast that can be better heats to raise the efficiency. Simultaneously, adopt three return stroke structures to let the space of material circulation diminish for the wind speed grow, the penetrating power is stronger, and hot-blast no longer just passes through from the material surface when meetting the material, and can pierce through the material, carries out 360 degrees heats to the material. Furthermore, three spiral plates are provided with small material plates perpendicular to the rotating shaft, so that materials can be further turned over and are in more sufficient contact with hot air. The design of three return stroke structures lets the whole space that takes up an area of equipment and diminishes, also lets the space of hot-blast and material circulation diminish, lets hot-blast velocity of flow grow, and the convection current design in the cooperation can heat the material to the thermal cracking temperature in the time of the utmost point short, at this moment just can promote the speed that the material was carried, has designed the conveying efficiency that three motor promoted the material for this. Three return strokes are matched, and the efficiency can be improved by about 20% by three motors.

The cross-sectional area of a rotary cylinder has been reduced to three return stroke structures, and the cooperation is gone up the spiral plate, lets the material move forward in continuous stirring, just can not take place the material and block up, so only leave rotary cylinder switching position promptly the material switching pipe takes place the putty easily, we have set up the access hole in this position, the convenient maintenance.

Drawings

FIG. 1 is a schematic view of a three-pass roasting kiln.

Fig. 2 is a schematic structural diagram of the first rotary drum.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A three-pass structure roasting kiln is composed of a hot air kiln, a first rotary drum, a second rotary drum, a third rotary drum, a first motor, a second motor and a third motor; a first spiral plate in the first rotary cylinder is connected with a first motor, a second spiral plate in the second rotary cylinder is connected with a second motor, and a third spiral plate in the third rotary cylinder is connected with a third motor; the first rotary cylinder, the second rotary cylinder and the third rotary cylinder are arranged in the hot air kiln; the first rotary cylinder and the third rotary cylinder are respectively communicated with the second rotary cylinder through material transfer pipes, the first rotary cylinder is provided with a feed port, and the third rotary cylinder is provided with a discharge port; a hot air inlet and a tail gas outlet are respectively arranged on the diagonal line of the hot air kiln; the first rotary cylinder, the second rotary cylinder and the third rotary cylinder are arranged from top to bottom in sequence; an upward pyrolysis gas outlet is formed in the tail part of the first rotary drum; a return hot air channel is formed in the hot air kiln through baffles which are arranged in a staggered manner, a hot air inlet and a tail gas outlet are respectively positioned at two ends of the hot air channel, and the hot air inlet is positioned above the lower tail gas outlet; and the material transfer pipe is provided with an access hole.

The working principle is as follows: as shown in fig. 1 and 2, the pyrolysis roasting material enters the rotary drum 4 from the feeding port 3, the motor 5 drives the spiral plate 9 to push the material forward, and hot air is filled into the hot air inlet 8, so that a reverse flow is formed, the material can be pyrolyzed sufficiently, and finally, the material is pyrolyzed from the discharging port 7 after passing through the three-pass drum. The tail gas of the hot air is discharged from the tail gas outlet 2. Gas generated by pyrolysis of the materials is discharged from a pyrolysis gas outlet 1. The equipment is provided with an access opening 6 for access to equipment faults.

Claims

1. A three-pass structure roasting kiln adopts a gas hot-blast stove to supply heat, and is characterized in that the three-pass structure roasting kiln consists of a hot-blast kiln, a first rotary cylinder, a second rotary cylinder, a third rotary cylinder, a first motor, a second motor and a third motor; a first spiral plate in the first rotary cylinder is connected with a first motor, a second spiral plate in the second rotary cylinder is connected with a second motor, and a third spiral plate in the third rotary cylinder is connected with a third motor; the first rotary cylinder, the second rotary cylinder and the third rotary cylinder are arranged in the hot air kiln; the first rotary cylinder and the third rotary cylinder are respectively communicated with the second rotary cylinder through material transfer pipes, the first rotary cylinder is provided with a feed port, and the third rotary cylinder is provided with a discharge port; and a hot air inlet and a tail gas outlet are respectively arranged on the diagonal line of the hot air kiln.

2. The roasting kiln with a triple-pass structure according to claim 1, wherein the first rotary drum, the second rotary drum and the third rotary drum are arranged in sequence from top to bottom; and an upward pyrolysis gas outlet is formed in the tail part of the first rotary drum.

3. The roasting kiln with the three-pass structure according to claim 1, wherein the hot air passage is formed by the staggered baffles, the hot air inlet and the tail gas outlet are respectively positioned at two ends of the hot air passage, and the hot air inlet is positioned above the lower tail gas outlet.

4. The roasting kiln with the three-pass structure according to claim 1, wherein the material transfer pipe is provided with an access hole.

5. The roasting kiln with three-pass structure as claimed in claim 1, wherein the first, second and third spiral plates are provided with small material plates perpendicular to the rotation axis for turning over the material while pushing the material.