CN216694207U

CN216694207U - Fluidized bed type solid waste drying system utilizing industrial waste heat

Info

Publication number: CN216694207U
Application number: CN202122843197.3U
Authority: CN
Inventors: 张忠华
Original assignee: Wuhan Enthalpy Cloud New Energy Technology Development Co ltd
Current assignee: Wuhan Enthalpy Cloud New Energy Technology Development Co ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-06-07
Anticipated expiration: 2031-11-18

Abstract

The utility model relates to a fluidized bed type solid waste drying system utilizing industrial waste heat, which comprises a wet storage bin, material conveying equipment, a fluidized bed dryer, a dust remover, a dry storage bin, a blower, an induced draft fan, an incinerator and a flue gas purification treatment device, wherein the wet storage bin is connected with the wet storage bin; a bin heater is arranged in the wet bin, and the wet bin is connected with the fluidized bed dryer through material conveying equipment; fluidized bed dryer middle part is provided with fluidized bed heater, fluidized bed dryer bottom is provided with gaseous dispersion device, the inside industry waste heat that lets in of feed bin heater and fluidized bed heater, set up the dust remover between fluidized bed dryer and the draught fan, the dust remover exhaust is sent into burning furnace by the draught fan, the fine dust that the dust remover was collected sends into fluidized bed dryer or dry material storehouse, burn and furnace and gas cleaning processing apparatus and be connected. The utility model can reduce the consumption and the exhaust amount of the drying gas, thereby reducing the power consumption of the fan and the exhaust treatment cost and simultaneously improving the utilization efficiency of heat energy.

Description

Fluidized bed type solid waste drying system utilizing industrial waste heat

Technical Field

The utility model relates to the field of solid waste drying, in particular to a fluidized bed type solid waste drying system utilizing industrial waste heat.

Background

Industrial and agricultural production produces a large amount of solid waste. Common agricultural solid wastes comprise straws, rice husks, mushroom dregs, peanut shells and the like, common forestry solid wastes comprise tree roots, tree barks, sawdust, various processing leftover materials and the like, and common industrial solid wastes comprise bagasse, vinasse, furfural dregs and the like. In the process of resource utilization, the solid waste is often required to be dried. For example, in the field of combustion power generation application, the drying of solid wastes can improve the heat value of fuel, reduce the fuel consumption and increase the power generation amount; the gasification gas-making application field, the solid waste drying can improve the gasification efficiency and the heat value of the gasification gas. The existing drying device can not meet the drying requirement of solid waste.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a fluidized bed type solid waste drying system using industrial waste heat, which can reduce the consumption and exhaust amount of drying gas, thereby reducing the power consumption of a fan and the exhaust treatment cost and improving the utilization efficiency of heat energy.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a fluidized bed type solid waste drying system utilizing industrial waste heat is constructed, and comprises a wet storage bin, material conveying equipment, a fluidized bed dryer, a dust remover, a dry storage bin, a blower, an induced draft fan, an incinerator and a flue gas purification treatment device;

a bin heater is arranged in the wet bin, and the wet bin is connected with the fluidized bed dryer through material conveying equipment; introducing drying gas into the bottom or the side wall of the fluidized bed dryer through a blower, and conveying the dry materials in the fluidized bed dryer into a dry material bin;

fluidized bed dryer middle part is provided with fluidized bed heater, fluidized bed dryer bottom is provided with gaseous dispersion device, the inside industry waste heat that lets in of feed bin heater and fluidized bed heater, set up the dust remover between fluidized bed dryer and the draught fan, the dust remover exhaust is sent into burning furnace by the draught fan, the fine dust that the dust remover was collected sends into fluidized bed dryer or dry material storehouse, burn and furnace and gas cleaning processing apparatus and be connected.

In the above scheme, the wet material bin is a round bin or a polygonal bin, and the bottom of the wet material bin is in a conical hopper shape.

In the above scheme, the fluidized bed heater is a tube type, a jacket type or a plate type.

In the above scheme, the gas dispersion device adopts a perforated pipe or a perforated plate.

In the scheme, the bottom and the side wall of the fluidized bed dryer are both provided with a discharge pipe.

In the above scheme, fluidized bed dryer inside is equipped with temperature measuring device and humidity measurement device, temperature measuring device and humidity measurement device are connected with forced draught blower, draught fan and industry waste heat supply delivery pump.

The fluidized bed type solid waste drying system utilizing the industrial waste heat has the following beneficial effects:

1. and the granular solid waste absorbs heat from the bin heater during the buffer storage in the wet bin, so that the material preheating process is completed, and the evaporation and dehydration speed after entering the fluidized bed dryer is increased.

2. When the induced draft fan and the blower are started, the dry gas uniformly enters a material layer in the fluidized bed dryer through the gas dispersing device, and the material is fluidized; starting an industrial waste heat supply delivery pump or valve, feeding fluid such as steam, hot water or heat transfer oil into a fluidized bed heater, absorbing heat from the heater by fluidized materials, cooling and then feeding the cooled fluidized materials back to a heat exchanger of an electric power plant for heating, and allowing air or flue gas absorbing a large amount of water vapor to leave a fluidized bed dryer and enter a dedusting and purifying treatment device.

3. The utility model can reduce the total amount of heat supply of air or flue gas due to the arrangement of the bin heater and the fluidized bed heater, thereby reducing the air or flue gas flow and the exhaust flow at the inlet of the fluidized bed dryer, and reducing the power consumption of a fan, the exhaust heat loss and the total heat loss.

4. The heater arranged in the fluidized bed has high heat transfer efficiency and small required heat transfer temperature difference, so that the low-temperature waste heat resources of 50-200 ℃ such as power plant flue gas, air compression system cooling oil, boiler drainage water, steam turbine exhaust and the like can be fully utilized.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic view of a fluidized bed type solid waste drying system using industrial waste heat according to the present invention.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the fluidized bed type solid waste drying system using industrial waste heat of the present invention includes a wet storage bin 1, a material conveying device 2, a fluidized bed dryer 3, a dust collector 4, a dry storage bin 5, a blower 6, an induced draft fan 7, an incinerator 8, and a flue gas purification processing device 9.

A bin heater 1.1 is arranged in the wet bin 1, and a fluidized bed heater 3.1 and a gas dispersion device 3.2 are arranged in the fluidized bed dryer 3. Industrial waste heat is introduced into the bin heater 1.1 and the fluidized bed heater 3.1, and the industrial waste heat is carried by fluids such as steam, hot water or thermal conductive hot oil. The wet material bin 1 is connected with a fluidized bed dryer 3 through a material conveying device 2, and drying gas introduced into the fluidized bed dryer 3 is used for fluidizing the material and taking away moisture in the material after passing through a gas dispersing device 3.2. A dust remover 4 is arranged between the fluidized bed dryer 3 and the induced draft fan 7, the exhaust gas of the dust remover 4 is sent into an incinerator 8 by the induced draft fan 7 for high-temperature harmless treatment, and the fine dust collected by the dust remover 4 is sent into the fluidized bed dryer 3 or the dry material bin 5.

The granular solid waste sequentially passes through a wet material bin 1, a material conveying device 2, a fluidized bed dryer 3 and a dry material bin 5, and partial fine dust is captured by a dust remover 4 and then is sent into the fluidized bed dryer 3 or the dry material bin 5. The granular solid waste obtains heat from a bin heater 1.1 in the wet bin 1 to finish preheating. The granular solid waste further gains heat from the fluidized bed 3.1 and air or flue gas in the fluidized bed dryer 3, wherein the moisture is absorbed and carried away by the air or flue gas after evaporation, completing the drying process. The airflow containing dust and volatile organic compounds at the outlet of the fluidized bed dryer 3 is dedusted by the deduster 4, decomposed by the incinerator 8, and finally discharged in an environment-friendly manner after passing through the flue gas purification treatment device 9. When the material drying exhaust gas is directly discharged to meet the environmental protection requirement, the exhaust gas of the dust remover 4 can not pass through the incinerator 8 and the flue gas purification treatment device 9.

Preferably, the wet material bin 1 is a round bin or a polygonal bin, and the bottom of the wet material bin is conical.

Preferably, a bin heater 1.1 arranged in the wet bin 1 is in a pipe type, a jacket type or a plate type and is connected with industrial waste heat.

Preferably, the fluidized bed heater 3.1 arranged in the fluidized bed dryer 3 is in a tube type, a jacket type or a plate type and is connected with industrial waste heat.

Preferably, the fluidized bed dryer 3 employs a perforated pipe or perforated plate gas dispersion device 3.2.

Preferably, a drying gas, such as air or flue gas, is introduced into the bottom or side wall of the fluidized bed dryer 3.

Preferably, both the bottom and the side walls of the fluidized bed dryer 3 are provided with discharge ducts for discharging dry material.

Preferably, a multilayer temperature measuring device and a humidity measuring device are arranged in the fluidized bed dryer 3, and the temperature measuring device and the humidity measuring device are connected with the air feeder 6, the induced draft fan 7 and the industrial waste heat supply conveying pump or valve and can control the operation of the air feeder and the circulating pump or the opening degree of the valve.

When the moisture of the dry materials is higher than the target value, the rotating speed of the material conveying equipment 2 can be reduced to reduce the feeding amount; when the moisture of the dry material is lower than the target value, the rotating speed of the material conveying equipment 2 can be properly increased to increase the feeding amount and improve the processing capacity of the dryer.

While the present invention has been described with reference to the particular illustrative embodiments, it is to be understood that the utility model is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and equivalents thereof, which may be made by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A fluidized bed type solid waste drying system utilizing industrial waste heat is characterized by comprising a wet material bin (1), material conveying equipment (2), a fluidized bed dryer (3), a dust remover (4), a dry material bin (5), a blower (6), an induced draft fan (7), an incinerator (8) and a flue gas purification treatment device (9);

a bin heater (1.1) is arranged in the wet bin (1), and the wet bin (1) is connected with a fluidized bed dryer (3) through material conveying equipment (2); the bottom or the side wall of the fluidized bed dryer (3) is introduced with drying gas through a blower (6), and dry materials in the fluidized bed dryer (3) are conveyed into a dry bin (5);

fluidized bed dryer (3) middle part is provided with fluidized bed heater (3.1), fluidized bed dryer (3) bottom is provided with gas dispersion device (3.2), feed bin heater (1.1) and fluidized bed heater (3.1) inside lets in the industry waste heat, set up dust remover (4) between fluidized bed dryer (3) and draught fan (7), dust remover (4) exhaust is sent into by draught fan (7) and is burnt burning furnace (8), the fine dust of dust remover (4) collection is sent into fluidized bed dryer (3) or drier storehouse (5), it is connected with gas cleaning processing apparatus (9) to burn burning furnace (8).

2. The fluidized bed type solid waste drying system using industrial waste heat according to claim 1, wherein the wet bin (1) is a round bin or a polygonal bin, and the bottom of the wet bin is cone-shaped.

3. The fluidized bed type solid waste drying system using industrial waste heat according to claim 1, wherein the fluidized bed heater (3.1) is of a tube type, a jacket type or a plate type.

4. The fluidized-bed solid waste drying system using industrial waste heat according to claim 1, wherein the gas dispersion device (3.2) employs perforated pipes or perforated plates.

5. The fluidized bed type solid waste drying system using industrial waste heat according to claim 1, wherein the fluidized bed dryer (3) is provided with a discharge pipe at the bottom and the side wall.

6. The fluidized bed type solid waste drying system using industrial waste heat according to claim 1, wherein a temperature measuring device and a humidity measuring device are provided inside the fluidized bed dryer (3), and the temperature measuring device and the humidity measuring device are connected with a blower (6), an induced draft fan (7) and an industrial waste heat supply delivery pump.