TWI755298B - Environmentally friendly sludge treatment method - Google Patents

Abstract

The invention discloses an environment-friendly sludge treatment method, which comprises the steps of granulation, heating, solidification, processing and recycling. Through these steps, the sludge can be dehydrated and dried to form a block, heated at an appropriate temperature, and the sludge particles can be converted from solid to liquid metal structure, sent out of the heating furnace, cooled and then converted into solid, and reused for processing procedures. Materials available.

Description

Environmentally friendly sludge treatment method

The present invention relates to an environmental protection sludge treatment method, in particular to a treatment method for sludge containing heavy metals.

According to the press, due to the industrial development, the environmental pollution of sludge is becoming more and more serious, such as ordinary people's livelihood sludge, fluorine-based wastewater sludge from the semiconductor industry and optoelectronics industry, arsenic-based wastewater sludge discharged from chemical vapor deposition processes, and metal basic wastewater sludge. Metal-containing wastewater sludge in the industrial surface treatment industry, inorganic particle coagulation sludge in coagulation and sedimentation treatment, etc.; the composition of sludge is very complex, and some sludges contain organic matter, nitrogen, phosphorus and other substances, and exist There are a lot of toxic and harmful components such as heavy metals, so from the perspective of economy and environmental protection, in order to prevent secondary pollution caused by sludge, sludge treatment will play a very important role.

Investigation, for the sludge treatment method containing heavy metals, usually the heavy metal components in the sludge are separated and solidified. After the solidification treatment, most of them are discarded and buried, which not only cannot be recycled but also causes the waste volume to increase. , which may cause heavy metals to dissolve again over time and pollute the land or groundwater, causing environmental and ecological hazards.

Due to the huge output of sludge, how to treat and utilize sludge has become a concern of modern industry; under this principle, if sludge waste can be reused, it can be used as landfill, valuable fuel, compost according to the type of sludge , building materials recycling materials and other uses will be the final policy of sludge treatment.

The reason is that the inventor of this case, with many years of rich experience in design, development and actual production in the related industry, feels that there is a need for improvement in the above-mentioned sludge treatment field, so he studies and improves with his experience in designing and manufacturing such products. , after a long period of conceptual experimentation and revision, more ideal effects can be achieved by the present invention.

The main purpose of the present invention is to improve the deficiencies of the conventional sludge treatment methods, thereby providing an effective method for treating waste sludge and achieving both environmental protection and economic benefits.

In order to achieve the above purpose, the method of the present application includes the steps of: granulation, heating, curing, processing and reuse. In the granulation step, the waste sludge is dewatered and dried to form granules, blocks or cakes. The heating step is a cupola, and the sludge after the granulation step is sent to the cupola and heated to 1800℃～1900℃ for combustion. The sludge particles will be transformed from solid to liquid metal structure containing silicon when treated at high temperature. , and then sent out by the cupola. The solidification step converts the liquid sludge into solid after cooling. In the processing and reusing step, the cooled mud block is reprocessed to make a finished product of recycled material.

Thereby, the purpose of sludge treatment and regeneration is achieved, which is both environmentally friendly and economical.

The technical content, features and effects of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings. In addition, before this case is described in detail, special explanations are needed. The accompanying drawings illustrate the basic steps of this case in a schematic way. Therefore, only the structures related to this case are shown in the drawings, and the displayed shapes, sizes, Proportions, or relative numbers, etc., are an optional design; they are stated first.

Please refer to the schematic block diagram of the implementation of the present invention shown in FIG. 1 , the present invention is an environmentally friendly sludge treatment method, which mainly includes steps such as granulation 10, heating 20, curing 30, and processing and reusing 40; wherein:

Granulation 10, the waste sludge is dewatered and dried by a granulator, and after the water content is reduced to the desired target, the sludge is formed into granules, blocks or cakes.

Heating 20, prepare a cupola, which is a kind of smelting equipment. It uses coke as fuel, and the heat generated by combustion is directly used to melt the charge, which saves energy consumption. The sludge after granulation of 10 is sent from the feed end of the cupola, and heated to a temperature of 1800℃～1900℃ by the cupola for combustion. When the sludge particles are treated at high temperature, the chemical formula of heavy metals in the sludge will be eliminated It is destroyed and covered by silicon. It reaches the melting point at high temperature and is transformed from a solid state to a liquid metal structure containing silicon (liquid glass), and then sent out from the discharge end of the cupola.

After solidification 30, the liquid sludge is sent out, and then converted into solid after cooling.

Processing and reuse 40, the cooled mud can be reprocessed, such as grinding into powder, adding additive materials (such as: alumina, ceramic powder, asbestos, glass fiber, etc.) mixed with resin, adhesive, etc., and then Pressed to form a finished product of recycled material.

The reused material provided by the present invention uses sludge as the main raw material source, and selectively adds additional materials according to the type of processing. The finished product produced by this method can be used as the main material of low-strength engineering, because it contains solid metal structure. , And because the harmful heavy metals are covered by silicon, it is not easy to precipitate. If you add the assistance of added materials, you can customize the production to form the effects of heat preservation, fire prevention, moisture absorption or impact resistance.

According to the above-mentioned method of the present invention, the environmental protection sludge can be effectively treated to achieve the purpose of reuse, which has both environmental protection and economic benefits. It is worth mentioning that the foregoing description of the present invention is the basic method for implementing the present invention, and in actual implementation, more complicated processes and steps will be adopted.

To sum up, the method according to the present invention can achieve the purpose of the present invention. However, the content of the above elements is only used to explain the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention. Equivalent modifications or changes made below should still be included in the protection scope of the present invention. From the above, the invention of this case has many advantages and has obvious practical characteristics, and the technical means used and the production method thereof are indeed developed by the inventor of this case, and the method is even more unprecedented. Since the requirements for a patent have been met, I will file an application in accordance with the law and pray for the grant of patent rights.

10: Granulation 20: heating 30: curing 40: Processing and reuse

FIG. 1 is a block diagram illustrating an implementation of the present invention.

10: Granulation

20: heating

30: curing

40: Processing and reuse

Claims (1)

An environmentally friendly sludge treatment method, comprising the steps of granulation, heating, solidification, processing and reuse; the granulation step is to dehydrate and dry waste sludge to form granules, blocks or cakes; the heating step is to Prepare a cupola, and send the sludge after the granulation step into the cupola and heat it to 1800℃～1900℃ for combustion. When the sludge particles are treated at high temperature, the chemical formula of harmful heavy metals in the sludge will be destroyed, and the sludge will be destroyed. Coated with silicon, it reaches the melting point at high temperature and is transformed from a solid state to a liquid metal structure containing silicon, which is then sent out from the cupola; the solidification step is to cool the liquid sludge and then convert it into a solid; this process is reused The step is to reprocess the cooled mud block to make a finished product of reused material.

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