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Belt type low-pressure superheat steam drying device

A superheated steam and drying device technology, which is applied in the direction of progressive dryer, drying gas arrangement, drying, etc., can solve the problem of limited internal space of rotary dryer, arranging a large number of heat exchange tubes, drying efficiency of dryer, etc. question

Active Publication Date: 2013-06-19
天津格物兴业热能科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main equipment in this technology is the rotary dryer, which is a type of rotating equipment. The internal space of the rotary dryer is very limited, and it is impossible to arrange a large number of heat exchange tubes in it, so it is difficult to use the saturated steam in the heat exchange tube to exchange heat through condensation. , to provide enough heat and high temperature conditions for the low-temperature steam generated in the drying process to make it become superheated steam
If it cannot ensure that the mixed steam in the dryer is always superheated steam, the drying efficiency of the dryer and the dryness of the material will be affected

Method used

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  • Belt type low-pressure superheat steam drying device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The material to be dried is sludge or peat with a moisture content of 50%, and its particle size is not greater than 2mm. The moisture content of the dried material is required to be less than 15%. A single drying device has a processing capacity of 200 tons / day.

[0068] The characteristics of the material to be dried are: the sludge deposited in the treatment of municipal sewage or the peat deposited in the treatment of coal washing sewage is a mixture of powdery and fine-grained materials and water. The drying is mainly to remove the external moisture. The working temperature of the drying medium is not sensitive, and its chemical properties are stable under 200℃, but the moisture content of the wet material is high and its bulk density is large, resulting in poor thermal conductivity and air permeability of the material, so it needs to be improved in the drying device For the temperature of the drying medium, use a lower flow rate of the drying medium, appropriately red...

Embodiment 2

[0084] The material to be dried is fly ash with a moisture content of 20%, or ore sand such as quartz sand, with a particle size of not more than 3mm, and the moisture content of the dried material is required to be less than 5%. A single set of drying device has a processing capacity of 100 tons / day.

[0085] The characteristics of the material to be dried are: fly ash or ore is a kind of fine particle solid material, and its drying is mainly to remove the external moisture and part of the internal moisture. The chemical properties of fly ash and ore are stable, the density of the material is large and the heat conduction The coefficient is small, and the air permeability of the material in the stacked state is good. During the drying process, the temperature and heating conditions of the drying medium do not need to be restricted. However, if the flow rate of the drying medium is too high, the fine fly ash will be blown up; in addition, due to drying Due to the limited conditi...

Embodiment 3

[0093] The material to be dried is apple pomace or fermented bacteria residue with a moisture content of 43%, and its particle size is not greater than 5mm. The moisture content of the dried material is required to be less than 10%. A single set of drying device has a processing capacity of 30 tons / day.

[0094] The characteristics of the dried material are: the apple pomace after squeezing the juice and the bacteria residue after fermentation are a kind of materials with large moisture content and no fixed form. The drying process is mainly to remove a large amount of external moisture and part of the internal moisture. Due to the loose structure, good air permeability, and stable chemical properties of this kind of material, the moisture content of the dried material is not strict, so the working temperature of the drying medium does not need to be too high, but the surface shape of the wet material is not The regular and low bulk density results in poor fluidity. Therefore, it ...

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Abstract

The invention relates to a belt type drying device capable of drying materials by using low-pressure superheat steam. The belt type drying device is a horizontal type pneumatic drying device with dual functions of heating drying media and drying the materials. A mode of internal heating is adopted by the belt type low-pressure superheat steam drying device, the low-pressure superheat steam circularly flowing inside the belt type low-pressure superheat steam drying device is continuously heated, the low-pressure superheat steam is circularly used as the drying media, the drying media is forced to flow inside the drying device and directly contact with wet materials which horizontally move along with a built-in belt type conveyer, and the purposes of heating and drying the materials are achieved through convection heat exchange and mass transfer diffusion between the drying media and the wet materials.

Description

Technical field [0001] The invention belongs to the technical field of industrial drying, and relates to a belt drying device that uses low-pressure superheated steam to dry materials. Its working principle is to adopt the internal heating mode of the drying device to continuously heat the circulating low-pressure superheated steam and use it as a drying device. The medium is recycled; the drying medium forced to flow inside the drying device is in direct contact with the wet material moving horizontally along with the internal belt conveyor, and heating and drying are achieved through convection heat exchange and mass transfer diffusion between the two The purpose of the material is to realize the independent control of the drying process by adjusting the working parameters of the drying medium and the material handling capacity, and obtain the comprehensive effect of good drying quality, safety, high efficiency, energy saving and environmental friendliness. technical backgroun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B15/18F26B21/00
Inventor 陈南岭
Owner 天津格物兴业热能科技有限责任公司
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