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Sludge blending and conveying system and method of supercritical water oxidation treatment system

A supercritical water oxidation and treatment system technology, applied in the oxidation treatment of sludge, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of low thermal conductivity, poor fluidity, and difficulty in realizing continuous transportation, etc. To achieve the effect of enhancing heat transfer and heating capacity, reducing flow resistance, improving efficiency and energy utilization

Active Publication Date: 2018-11-20
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the viscosity of sludge increases with the increase of sludge solid content, the normal temperature viscosity of sludge with 10wt.% solid content is usually higher than 15000mpa.s, with poor fluidity and low thermal conductivity, making it difficult to achieve continuous transportation. The above reasons directly lead to the great limitations of using supercritical oxidation technology to treat sludge.

Method used

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  • Sludge blending and conveying system and method of supercritical water oxidation treatment system
  • Sludge blending and conveying system and method of supercritical water oxidation treatment system
  • Sludge blending and conveying system and method of supercritical water oxidation treatment system

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Embodiment approach

[0035] see figure 2 , the second embodiment of the present invention is the same as the first embodiment except for the first heating and mixing system. In this embodiment, the first heating and mixing system includes two material allocation heating and mixing devices, a material buffer pool 5 and a first mixer 13 arranged inside the material buffer pool 5; the outlet of the material allocation heating and mixing device is sequentially connected to the material buffer pool 5 and the second Two heating mixing systems. A material blending heating and mixing device includes a first material blending pool 1, a second screw pump 20, a second mixer 14 arranged inside the first material blending pool 1 and a third high temperature and high pressure exchanger arranged inside the first material blending pool 1 The heater 22 ; the outlet of the first material adjustment tank 1 is connected to the second screw pump 20 and the material buffer tank 5 in sequence. Another material blendi...

Embodiment 1

[0045] see figure 1 , the first material storage tank 11 and the second material storage tank 12 transport the sludge to the first material allocation pool 1 and the second material allocation pool 3 respectively, and inject water for allocation at the same time; Under the action of the second agitator 14 and the fourth agitator 18 in the material blending pool 1 and the second material blending pool 3, the mixing and homogenization are preliminarily completed, and the first material blending pool 1 and the second material blending pool 3 can be used to store the prepared Sludge; then the sludge is strongly transported to the material buffer tank 5 by the first material conveyor 2 and the second material conveyor 4, and the single-strand sludge feeding or double-strand sludge mixed feeding can be determined according to the actual situation; the sludge Under the action of the first mixer 13, multi-dimensional and complex shearing operation is carried out to further complete th...

Embodiment 2

[0048] see figure 2 , the first material storage tank 11 and the second material storage tank 12 transport the sludge to the first material allocation pool 1 and the second material allocation pool 3 respectively, and inject water for allocation at the same time; Under the action of the second agitator 14 and the fourth agitator 18 in the first material blending pool 1 and the second material blending pool 3, the mixing and homogenization are preliminarily completed; at the same time, through the third high temperature and high pressure heat exchanger 22 and the fourth high temperature and high pressure heat exchanger The wall surface of the heat exchange tube at 23 absorbs heat and heats up to no less than 70°C; then the sludge is forcefully transported to the material buffer pool 5 through the second screw pump 20 and the third screw pump 21, and the material buffer pool 5 is used for storage, buffering, deployment and heating The final sludge acts as a buffer when the proc...

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Abstract

The invention discloses a sludge blending and conveying system and method of a supercritical water oxidation treatment system. The sludge blending and conveying system comprises a material storing device, a first heating and mixing system, a second heating and mixing system, a material pump, a reaction unit and a heating and utilizing unit, wherein an outlet of the material storing device is sequentially connected with the first heating and mixing system, the second heating and mixing system, the material pump, the reaction unit and the heating and utilizing unit; an oxidizer inlet is formed in the reaction unit; and materials and oxidizers react in the reaction unit to form reactants, and then the reactants are externally discharged through the heat obtaining and utilizing unit. In accordance with various materials, each equipment for blending and conveying is subjected to optimal design and reasonable arrangement, and the purpose of intermittent blending or continuous blending, and continuous conveying of the supercritical water oxidation treatment system is realized; through reasonable distribution of heat energy generated after the reaction of the supercritical water oxidationtreatment system, energy resources are saved; and popularization and application of a supercritical water oxidation technique on various slurry of sludge, greasy filth, oil sand, high-viscosity organic matter and the like are forcefully promoted.

Description

technical field [0001] The invention belongs to the field of sludge harmless treatment and resource utilization, and relates to a sludge preparation and conveying system and a method of a supercritical water oxidation treatment system. Background technique [0002] With the rapid acceleration of my country's industrialization and urbanization process and the continuous growth of the total population, the amount of sewage discharge has increased year by year, while the amount of sludge produced by conventional sewage treatment methods has increased sharply. According to statistics, the annual output of urban sludge in the country is only It has exceeded 40 million tons (moisture content 80%), and the output of industrial sludge has reached more than 30 million tons. It has a large water content and contains a considerable proportion of salt, heavy metals, refractory toxic organic pollutants, bacteria and parasites Eggs and other pathogenic organisms have a foul smell and cause ...

Claims

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Application Information

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IPC IPC(8): C02F11/06
CPCC02F11/086
Inventor 王树众宋文瀚张熠姝杨健乔李建娜杨闯徐甜甜
Owner XI AN JIAOTONG UNIV
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