Low-temperature closed-loop sludge drying method
A sludge drying and closed-loop technology, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of toxic and harmful exhaust gas drying effect, low sludge moisture content, low drying temperature, etc., and achieve low energy consumption. , The effect of low drying temperature and low moisture content
Active Publication Date: 2017-11-03
浙江诺曼环保工程技术有限公司
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[0004] In view of this, the present invention aims at the technical problems of high drying temperature required in the prior art, prone to toxic and harmful tail gas and poor drying effect, and proposes a low drying temperature, low moisture content of sludge after drying, Low-temperature closed-loop sludge drying method with low energy consumption
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[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0024] The present invention covers any alternatives, modifications, equivalent methods and arrangements made within the spirit and scope of the present invention. In order to give the public a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, the drawings of the present invention are not drawn exactly to actual scale for the purpose of illustration, and are described herein.
[0025] like figure 1 and 2 As shown, a low-temperature closed-loop sludge drying system is shown, including a drying box and a circulation system, the drying box is provided with a feed port 8 and a material outlet 20, and the circulation syst...
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The invention relates to a low-temperature closed-loop sludge drying method. The low-temperature closed-loop sludge drying method is based on a low-temperature closed-loop sludge drying system. The low-temperature closed-loop sludge drying system comprises a drying box and a circulating system, wherein the drying box is provided with a feeding opening (8) and a discharging opening (20); the drying box respectively communicates with the circulating system through an air outlet (7) and a hot air inlet (24); the circulating system comprises a first heat exchanger (6), a second heat exchanger (4), a third heat exchanger, a fourth heat exchanger and a fan; one end of the first heat exchanger communicates with the drying box through the air outlet while the other end of the first heat exchanger communicates with the second heat exchanger through an air duct; the second heat exchanger communicates with the third heat exchanger through an air duct; the other end of the third heat exchanger communicates with the fourth heat exchanger through an air duct; the other end of the fourth heat exchanger communicates with the drying box through the hot air inlet; and the fan is arranged in an air duct. The drying temperature is low, drying is implemented in the closed-loop system, odor cannot be generated in a drying process, the water content of dried sludge is low, and the energy consumption is low.
Description
technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a low-temperature closed-loop sludge drying method. Background technique [0002] With the expansion of the scale of sewage treatment and the improvement of standards, the amount of sludge produced continues to increase. In addition to the sludge accumulated in the past, the treatment and disposal of sludge has become a major problem in the field of sewage treatment, and the drying treatment of sludge is one of them. crucial step. [0003] In order to reduce pollution and avoid the generation of greenhouse gases, sludge can be turned into treasure, dried and made into a usable fuel. When mixed with pulverized coal in a power plant boiler, its calorific value can reach 2500 kcal-3400 kcal / kg, that is, two tons of 30% sludge can be regarded as the calorific value of one ton of coal. The general process of sludge treatment is drying and dehydration. At present, sludge dr...
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IPC IPC(8): C02F11/12
CPCC02F11/12
Inventor 饶宾期蒋正海刘晓冬卢锡龙万延见
Owner 浙江诺曼环保工程技术有限公司