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Combined sludge treatment method and dry distillation device applied by same

A combined technology for sludge treatment, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc. Sludge treatment and high treatment costs in small and medium-sized sewage treatment plants, to achieve the effect of increasing treatment energy consumption, low equipment investment and maintenance costs, and easy control

Active Publication Date: 2010-03-17
沈洪来
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems in the application of this engineering technology, such as large investment, high treatment cost, secondary pollution and difficulty in energy recovery of sludge combustion technology, and it is generally difficult to be suitable for the treatment of sludge in small and medium-sized sewage treatment plants.

Method used

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  • Combined sludge treatment method and dry distillation device applied by same
  • Combined sludge treatment method and dry distillation device applied by same
  • Combined sludge treatment method and dry distillation device applied by same

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1, the dry distillation equipment that sludge treatment adopts, refer to attached figure 1 , 2 , 3.

[0019] The retort equipment provided by the present invention includes a retort box 100, the wall 15 is the main body of the retort box, is the basis for equipment installation, and is also a high temperature heat insulation layer. The wall is also provided with an insulation material 14 to reduce heat dissipation and improve thermal efficiency. Improve working environment. In the whole sludge treatment process equipment, the dry distillation box 100 is figure 1 , 2 The combustion chamber can be connected in the A direction, and the rotary kiln hot blast stove can be connected in the B direction.

[0020] There are multiple groups of two-stage retorts in the retort box, and each group of retorts is modularized. The groups are independent of each other and can be disconnected from the system. The maintenance of equipment is more convenient, which is conduc...

Embodiment 2

[0028] Embodiment 2, combined sludge treatment, with reference to figure 1 , 2 , 3, 4, 5, 6.

[0029] 1. Sludge semi-drying

[0030] Dewatered sludge (after being dehydrated by the sewage treatment plant, the water content is generally 75%) is a sticky plastic solid, which is pushed into the rotary kiln 300 through the feeder 301 (a hot blast stove can be used for small factories) ), heat source gas and sludge enter from the same end of the equipment. During the transportation of the sludge in the rotary kiln or hot blast furnace, it is in full contact with the heat source gas, and with the rotation of the kiln body, the material is continuously turned, and the material and the air flow flow together to the kiln tail, where the sludge is discharged through the discharge device Rotary kiln. According to the temperature of the heat source gas, by adjusting the amount of sludge feed and kiln speed, the sludge moisture at the discharge port is controlled to 20-35% (referred to...

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Abstract

The invention provides a combined sludge treatment method. In the treatment method, by combining the technologies of semidrying, dry distillation and cracking as well as combustion treatment, dewatering sludge is treated step by step; the sludge with water content of 75 percent is treated, and then inorganic substances are converted into solid residues by high-temperature treatment, and organic substances are converted into CO2, H2O and recyclable resource of fluid oil; and in the treatment process, heat energy can be fully and comprehensively utilized, all treatment technologies are reasonably distributed, the treatment energy consumption is not increased when treatment processes are increased, and heat energy from coal combustion is used in balance. The invention also provides a dry distillation device for treating sludge, comprising a dry distillation box, wherein a group of or a plurality of groups of two-stage dry distillers for treating sludge are arranged, and the two-stage drydistiller comprises a first-stage dry distiller and a second-stage dry distiller. In the dry distillation process, the material process and the stirring force are different, the materials are mainly dried continuously in the first-stage dry distiller, and the cracking is mainly carried out in the second-stage dry distiller; and the hierarchical arrangement is beneficial to process control, waste gas treatment and heat recovery.

Description

technical field [0001] The invention relates to the technical field of sludge treatment methods, and also relates to the technical field of dry distillation equipment in sludge treatment. Background technique [0002] The disposal of excess sludge produced by urban sewage treatment plants has always been a problem that plagues the normal operation of sewage treatment plants. There are three current disposal methods: stable landfill, land use, and combustion. Sludge combustion is the "most thorough" sludge Disposal method. Among them, the fluidized bed combustion technology is the most successful application. The fluidized bed combustion technology is that the dewatered sludge is dried, and then the sludge is directly burned at a high temperature in the fluidized bed (less than 850 ° C). The fluidized bed is a fierce and fast process. Approach,. Its technical features: the particles in the fluidized layer are in a state of intense motion, the heat transfer speed of the mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/10C02F11/12F23G7/00
Inventor 沈洪来
Owner 沈洪来
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