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Use of urban refuse as solid fuel

A technology of municipal waste and solid fuel, applied in solid fuel, fuel, biofuel and other directions, can solve the problem of large fuel consumption and so on

Inactive Publication Date: 2007-09-05
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the temperature in northern my country is low in winter, so heating needs to be supplied, and a large amount of fuel is also required for heating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] Example 1: After the municipal solid waste is collected in the pretreatment field, manual sorting is used to sort out the combustible components of the waste, and then the combustible components of the waste are crushed to 5mm. The crushed garbage is dried, and the drying adopts hot air direct heating to control the temperature at 150°C. The dried garbage enters the low-temperature pyrolysis device, the garbage is dechlorinated and pyrolyzed at 345°C, and the gas enters the purification device to be purified. Pyrolysis produces solid fuel.

example 2

[0037] Example 2: The steps are the same as in Example 1, except that the garbage is broken to 3mm. Drying is directly heated by hot air at 100°C. After drying, tar with a weight ratio of 5% (the following ratios are all weight percentages) is added as a calorific value increase agent to carry out dechlorination and pyrolysis at 320°C.

example 3

[0038] Example 3: The solid fuel prepared in the above embodiment is transported to a seawater desalination plant using multi-effect evaporation for combustion, and the heat generated evaporates the seawater, and the vapor obtained by evaporation enters the next-effect evaporator, and the steam is Condensation becomes purified fresh water. The heat released during the condensation process further evaporates other sea water to form steam, which in turn forms multi-effect evaporation to produce fresh water. The gas produced by combustion enters the lower part of the absorption tower, flows countercurrently with the seawater, and uses the seawater as an absorbent to purify the gas. Sea water can be recycled.

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PUM

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Abstract

This invention belongs to the domain of environment-protection technology which is used to the solid fuel of the urban rubbish pyrogenation. It utilizes the fuel from the urban rubbish to the seawater desalination following the steps: 1) carry the solid fuel to the seawater-desalination place; 2) burn; 3) producing sea steam by the burning heat and the steam condenses to the fresh water. During the desalination, it can adopt multi-scale instant steam or multi-efficiency steam. The sea water transforms to the fresh water by steaming after deleting the suspended substance. Meanwhile, it produces condemned inorganic-salt waste liquid which can get NaCl, MgCl2, MgSO4 via crystallization. It can also get NaOH, H2, Cl2 via dialyses or compounds the H2 and Cl2 to HCl which is the chemistry material. This invention can make the rubbish resource, reduction, non-harm which comes to circulation and save much oil and coal that are non-recycled fossil fuel. It has good social and environmental benefits.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection, and particularly relates to the application of solid fuel for urban garbage. Background technique [0002] Urban garbage contains many organic substances that are easy to ferment. If it is left untreated, it will produce odor and polluting leachate, which will affect the environment. Moreover, the volume of garbage is large and it takes up space. Therefore, it must be treated in time to make it harmless. Reduction and energy conversion. Therefore, after pyrolysis treatment, it can be stored for a long time in a small volume for various occasions. [0003] The lack of fresh water has become a serious problem affecting production and life in most parts of northern China. As an important method to solve the problem of water shortage in the northern coastal areas, desalination has received widespread attention from the society. Among them, heat source-type seawa...

Claims

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Application Information

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IPC IPC(8): F23G5/34C10L5/46C02F1/04
CPCY02E50/30Y02E50/10Y02A20/124
Inventor 张书廷
Owner TIANJIN UNIV
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