CN216236853U - Pyrolysis device and pyrolysis system for treating industrial organic solid waste - Google Patents

Abstract

A pyrolysis apparatus for treating industrial organic solid waste, comprising: the system comprises a rotary pyrolysis system, a molten salt heat exchange system and a discharging system; the rotary pyrolysis system comprises a reaction kettle, a heat transfer medium, a sealing plate, a stirring driving device and a stirrer; the stirring shaft of the stirring driving device is superposed with the central axis of the reaction kettle, and the stirring driving device drives the stirrer to be used for stirring the heat transfer medium and the pyrolysis material in the reaction kettle; the molten salt heat exchange system comprises a molten salt heat exchange cavity, a molten salt inlet and a molten salt outlet; the molten salt heat exchange cavity is coated on the outer surface of the reaction kettle and is provided with the molten salt inlet and the molten salt outlet for molten salt to flow in and out of the molten salt heat exchange cavity; the utility model also provides a pyrolysis system comprising the pyrolysis device for treating the industrial organic solid waste.

Description

Pyrolysis device and pyrolysis system for treating industrial organic solid waste

Technical Field

The utility model relates to the technical field of solid waste treatment and pyrolysis reaction, in particular to a pyrolysis device and a pyrolysis system for treating industrial organic solid waste.

Background

Industrial organic solid waste refers to solid waste generated in industrial production activities at present, and mainly consists of dust, waste residues and other waste components discharged in industrial production processes. According to authoritative investigation, the total amount of solid waste generated by industrial enterprises in China in 2018 is up to 30 hundred million tons. The industrial solid waste organic matter has high content, is difficult to degrade, occupies valuable land resources and causes serious pollution.

The pyrolysis gasification technology is an important research direction in the field of organic solid waste heat disposal as a thermal conversion technology aiming at energy utilization of solid raw materials, and is particularly suitable for clean thermal conversion of organic solid waste in cities and towns and industries with complex raw material composition, difficult process control and serious secondary pollution. Therefore, the project develops pyrolysis equipment and a process which are more uniform in heating industrial organic solid waste materials, higher in pyrolysis efficiency and more controllable in pyrolysis product components by starting from a pyrolysis gasification treatment technology and aiming at the characteristics of urban and industrial organic solid waste raw material components.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pyrolysis device and a pyrolysis system for treating industrial organic solid waste, wherein heat exchange between hot molten salt and a reaction kettle is used as a heat source, and a heated heat transfer medium is further contacted with a solid-phase material for heat transfer.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a pyrolysis apparatus for treating industrial organic solid waste, comprising: the system comprises a rotary pyrolysis system, a molten salt heat exchange system and a discharging system;

the rotary pyrolysis system comprises a reaction kettle, a heat transfer medium, a sealing plate, a stirring driving device and a stirrer;

the stirring shaft of the stirring driving device is superposed with the central axis of the reaction kettle, and the stirring driving device drives the stirrer to be used for stirring the heat transfer medium and the pyrolysis material in the reaction kettle;

the molten salt heat exchange system comprises a molten salt heat exchange cavity, a molten salt inlet and a molten salt outlet;

the fused salt heat transfer chamber cladding in reation kettle surface, the fused salt heat transfer chamber is equipped with fused salt import and fused salt export for the fused salt flows business turn over the fused salt heat transfer chamber.

Preferably, the sealing plate completely seals the reaction kettle, the sealing plate is provided with a pyrolysis material inlet hole, a pyrolysis gas outlet hole and a sensor probe hole, the pyrolysis material inlet can be communicated with the reaction kettle through the pyrolysis material inlet hole, and pyrolysis gas in the reaction kettle can be communicated with the pyrolysis gas outlet through the pyrolysis gas outlet hole.

Preferably, the discharging system comprises a pyrolysis material outlet pipe, a star-shaped discharger, a water-cooling screw conveyor and a slag outlet; the bottom of the reaction kettle is provided with a pyrolysis material outlet hole, and the pyrolysis material outlet hole is connected with the input end of the pyrolysis material outlet pipe.

Preferably, the output end of the pyrolysis material outlet pipe is connected with the input end of the star-shaped discharger, the output end of the star-shaped discharger is connected with the input end of the water-cooling screw conveyor, and the output end of the water-cooling screw conveyor is connected with the slag outlet.

Preferably, the pyrolysis material outlet pipe comprises a thermocouple probe hole and a filter screen, and the filter screen is used for isolating the heat transfer medium from leaving the reaction kettle through the pyrolysis material outlet hole.

Preferably, the water-cooling screw conveyor comprises a cooling water inlet, a cooling water outlet and a second pyrolysis gas outlet.

Preferably, the outside of the fused salt heat exchange cavity is wrapped by a heat insulation layer made of ceramic fibers, and the thickness of the heat insulation layer is larger than 2 cm.

A pyrolysis system, comprising: the system comprises molten salt, an electric heating molten salt tank, a molten salt pump and the pyrolysis device for treating industrial organic solid waste;

the output end of the electric heating molten salt tank is connected with the input end of the molten salt pump, the output end of the molten salt pump is connected with the molten salt inlet, and the molten salt outlet is connected with the input end of the electric heating molten salt tank.

The utility model has the beneficial effects that:

1. the pyrolysis reaction is supplied with heat through the external heat exchange of the hot molten salt and the reaction kettle, and the material is pyrolyzed by means of the internal heat exchange of the heat transfer medium and the material, so that the heat transfer efficiency is greatly improved, and the pyrolysis temperature of the industrial organic solid waste is met;

2. aiming at large size and complex components of industrial organic solid waste, a hard heat transfer medium is designed to be mixed and stirred with materials, the materials are crushed while being pyrolyzed, the materials are pyrolyzed fully, the pyrolysis efficiency is effectively improved, and the components of pyrolysis products are more concentrated due to uniform pyrolysis temperature;

3. the pyrolysis time of industrial organic solid waste is controlled by adjusting the rotating speed of the stirrer, and the pyrolysis speed is controlled by adjusting the flow rate of the molten salt, so that the continuous and controllable operation of the system is realized; meanwhile, the heat transfer medium cannot be poured out together with the materials, so that heat loss is avoided, and the system can continuously feed and discharge materials.

Drawings

FIG. 1 is a schematic structural diagram of a pyrolysis apparatus for treating industrial organic solid waste according to an embodiment of the present invention;

FIG. 2 is a process flow diagram of a pyrolysis system provided by an embodiment of the utility model.

The device comprises a molten salt inlet 1, a heat preservation layer 2, a molten salt heat exchange cavity 3, a molten salt outlet 4, a thermocouple 5, a pyrolysis gas outlet 6, a stirring driving device 7, a pyrolysis material inlet 8, a double-color thermometer 9, a reaction kettle 10, a stirrer 11, a heat transfer medium 12, a filter screen 13, a support rack 14, a thermocouple probe hole 15, a star-shaped discharger 16, a cooling water outlet 17, a water-cooling screw conveyor 18, a second pyrolysis gas outlet 19, a slag outlet 20, a cooling water inlet 21, a sealing plate 22, a pyrolysis material outlet pipe 23, an electric heating molten salt tank 24 and a molten salt pump 25.

Detailed Description

The technical solution of the present invention is further described below with reference to the accompanying drawings and the detailed description.

Example 1

Referring to fig. 1, fig. 1 is a schematic structural diagram of a pyrolysis apparatus for treating industrial organic solid waste according to an embodiment of the present invention. As can be seen from fig. 1, a stirring shaft of the stirring driving device 7 coincides with a central axis of the reaction kettle 10, and the stirring driving device 7 drives the stirrer 11 to stir the heat transfer medium 12 and the pyrolysis material in the reaction kettle 10;

the shape of the fused salt heat exchange cavity 3 is a hollow structure coated on the outer surface of the reaction kettle 10 as shown in fig. 1, a fused salt flowing heat exchange space is arranged in the hollow structure, and the fused salt heat exchange cavity 3 is provided with the fused salt inlet 1 and the fused salt outlet 4 for the fused salt to flow in and out of the fused salt heat exchange cavity 3;

preferably, in order to reduce heat loss, the sealing plate 22 completely seals the reaction kettle 10, the sealing plate 22 has a pyrolysis material inlet function, a pyrolysis gas exhaust function, and a reaction kettle 10 monitoring function besides a heat preservation function, the pyrolysis material inlet 8 can be communicated with the reaction kettle 10 through the pyrolysis material inlet hole, pyrolysis gas in the reaction kettle can be communicated with the pyrolysis gas outlet 6 through the pyrolysis gas outlet hole, in this embodiment, the thermocouple 5 and the two-color thermometer 9 are respectively inserted into a sensor probe hole provided in the sealing plate, the temperature is simultaneously output to a control system and visually displayed on site in the pyrolysis process of the reaction kettle 10, and in addition, other monitoring sensors such as a camera can be arranged in the sensor probe hole according to actual function requirements;

preferably, the discharging system comprises a pyrolysis material outlet pipe 23, a star-shaped discharger 16, a water-cooled screw conveyor 18 and a slag outlet 20; a pyrolysis material outlet hole is formed in the bottom of the reaction kettle 10 and connected with the input end of the pyrolysis material outlet pipe 23; a pyrolysis material outlet hole is formed in the bottom of the reaction kettle 10, so that pyrolysis materials are gathered effectively, and discharging control can be realized by adjusting the rotating speed and the rotating direction of the stirrer 11;

preferably, the output end of the pyrolysis material outlet pipe 23 is connected with the input end of the star-shaped discharger 16, the output end of the star-shaped discharger 16 is connected with the input end of the water-cooling screw conveyor 18, and the output end of the water-cooling screw conveyor 18 is connected with the slag outlet 20;

preferably, the pyrolysis material outlet pipe 23 comprises a thermocouple probe hole 15 and a filter screen 13, the filter screen 13 is used for isolating the heat transfer medium 12 from leaving the reaction kettle 10 through the pyrolysis material outlet hole, and the filter screen 13 ensures that the heat transfer medium 12 and the material do not enter the pyrolysis material outlet pipe 23 together, so that a large amount of heat loss is avoided;

preferably, the water-cooled screw conveyor 18 comprises a cooling water inlet 21, a cooling water outlet 17 and a second pyrolysis gas outlet 19;

preferably, in this embodiment, the heat transfer medium 12 is spherical quartz sand; the spherical quartz sand has excellent heat transfer performance, and has higher heat utilization rate compared with the existing external heating type rotary pyrolysis furnace by further contacting the heated heat transfer medium 12 with a solid phase material for heat transfer;

preferably, in the embodiment, an insulating layer 2 is wrapped on the outer side of the molten salt heat exchange cavity 3, the thickness of the insulating layer 2 is 2.5cm, and the material is ceramic fiber;

the pyrolysis process of the pyrolysis device for treating industrial organic solid waste comprises the following steps:

step 1, feeding the pyrolyzed solid waste material into a pyrolyzed material inlet 8 by a bucket elevator;

step 2, continuously operating the stirrer 11 to mix the materials in the reaction kettle 10 with the heat transfer medium 12, heating the materials and the heat transfer medium 12 by molten salt in the molten salt heat exchange cavity 3, crushing and heating the materials to carry out pyrolysis reaction, and continuously pumping out gas-phase products of the pyrolysis reaction in the reaction kettle 10 by using a fan;

step 3, after the pyrolysis reaction of the materials reaches the preset time, opening a discharge valve to enable the materials in the reaction kettle 10 to enter a pyrolysis material outlet pipe 23 through a filter screen 13, opening a star-shaped discharger 16 and operating a water-cooled screw conveyor 18 to discharge solid-phase and gas-phase products after pyrolysis;

and 4, repeating the step 1, and starting the pyrolysis reaction in the next period.

Example 2

Referring to fig. 1 and 2, an output end of the electric heating molten salt tank 24 is connected to an input end of the molten salt pump 25, an output end of the molten salt pump 25 is connected to the molten salt inlet 1, the molten salt outlet 4 is connected to an input end of the electric heating molten salt tank 24, molten salt is heated and melted in the electric heating molten salt tank 24 and then is sent into the molten salt heat exchange cavity 3 through the molten salt inlet 1 for heat exchange, and the molten salt after heat exchange is sent into the electric heating molten salt tank 24 through the molten salt outlet 4 for reheating to complete molten salt circulation;

preferably, in this embodiment, the molten salt is a nitrate salt.

Example 3

Referring to fig. 1 and 2, an output end of the electric heating molten salt tank 24 is connected to an input end of the molten salt pump 25, an output end of the molten salt pump 25 is connected to the molten salt inlet 1, the molten salt outlet 4 is connected to an input end of the electric heating molten salt tank 24, molten salt is heated and melted in the electric heating molten salt tank 24 and then is sent into the molten salt heat exchange cavity 3 through the molten salt inlet 1 for heat exchange, and the molten salt after heat exchange is sent into the electric heating molten salt tank 24 through the molten salt outlet 4 for reheating to complete molten salt circulation;

preferably, in this embodiment, the molten salt is a carbonate and sulfate composition.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the utility model and should not be construed in any way as limiting the scope of the utility model. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims (8)

1. A pyrolysis apparatus for treating industrial organic solid waste, comprising: the system comprises a rotary pyrolysis system, a molten salt heat exchange system and a discharging system;

the rotary pyrolysis system comprises a reaction kettle, a heat transfer medium, a sealing plate, a stirring driving device and a stirrer;

the stirring shaft of the stirring driving device is superposed with the central axis of the reaction kettle, and the stirring driving device drives the stirrer to be used for stirring the heat transfer medium and the pyrolysis material in the reaction kettle;

the molten salt heat exchange system comprises a molten salt heat exchange cavity, a molten salt inlet and a molten salt outlet;

the fused salt heat transfer chamber cladding in reation kettle surface, the fused salt heat transfer chamber is equipped with fused salt import and fused salt export for the fused salt flows business turn over the fused salt heat transfer chamber.

2. The pyrolysis device for treating industrial organic solid waste according to claim 1, wherein the sealing plate completely seals the reaction kettle, and is provided with a pyrolysis material inlet hole, a pyrolysis gas outlet hole and a sensor probe hole, wherein the pyrolysis material inlet can be communicated with the reaction kettle through the pyrolysis material inlet hole, and pyrolysis gas in the reaction kettle can be communicated with the pyrolysis gas outlet through the pyrolysis gas outlet hole.

3. The pyrolysis apparatus for treating industrial organic solid waste according to claim 1, wherein the discharging system comprises a pyrolysis material outlet pipe, a star discharger, a water-cooled screw conveyor, a slag outlet; the bottom of the reaction kettle is provided with a pyrolysis material outlet hole, and the pyrolysis material outlet hole is connected with the input end of the pyrolysis material outlet pipe.

4. The pyrolysis device of claim 3, wherein the output end of the pyrolysis material outlet pipe is connected with the input end of the star-shaped discharger, the output end of the star-shaped discharger is connected with the input end of the water-cooled screw conveyor, and the output end of the water-cooled screw conveyor is connected with the slag outlet.

5. A pyrolysis device for treating industrial organic solid waste according to claim 3, wherein the pyrolysis material outlet pipe comprises a thermocouple probe hole, a screen for isolating the heat transfer medium from exiting the reaction vessel through the pyrolysis material outlet hole.

6. The pyrolysis device for treating industrial organic solid waste according to claim 3, wherein the water-cooled screw conveyor comprises a cooling water inlet, a cooling water outlet and a second pyrolysis gas outlet.

7. The pyrolysis device for treating industrial organic solid waste according to claim 1, wherein an insulating layer is wrapped outside the molten salt heat exchange cavity, is made of ceramic fibers and is larger than 2cm thick.

8. A pyrolysis system, comprising: molten salt, an electrically heated molten salt tank, a molten salt pump, and the pyrolysis apparatus of any one of claims 1 to 7 for treating industrial organic solid waste;

the output end of the electric heating molten salt tank is connected with the input end of the molten salt pump, the output end of the molten salt pump is connected with the molten salt inlet, and the molten salt outlet is connected with the input end of the electric heating molten salt tank.

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