A sludge mvc evaporation drying system and method for drying sludge

A drying system and sludge technology, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of ineffective utilization and loss, and achieve stable and efficient operation, saving use costs, and reducing treatment costs. Effect

Active Publication Date: 2015-08-12
上海故陈技术开发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, there is a considerable waste in the sludge drying technology. The water originally stored in the sludge is dried and turned into water vapor. The water vapor contains a large amount of enthalpy lost in vain and cannot be effectively used.

Method used

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  • A sludge mvc evaporation drying system and method for drying sludge

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Effect test

Embodiment 1

[0027] A leather factory in Yangzhou produces about 12 tons of wet sludge per day. In the past, the traditional sludge steam drying technology was used for sludge drying treatment. The water enters the wastewater treatment tank for retreatment; its direct operating costs are as follows: 1) Steam cost: Generally, about 0.8 tons of steam is needed to dry 1 ton of wet sludge, and the unit price of steam is 240 yuan / ton, so the steam cost is E 1 =0.8*240=192 yuan / ton; 2) Electricity fee: 0.5 tons of wet sludge per hour, sludge lifting device operating power 1.5kw, dryer stirring power 15kw, water film dust removal, comprehensive oxidation treatment device, induced draft fan The operating power is 8kw, the total operation is 24.5kw, and the electricity fee is 0.8 yuan / ton, then the electricity fee is E 2 =24.5*0.8 / 0.5=39.2 yuan / ton. Total E=E 1 +E 2 =231.2 yuan / ton.

[0028] Later, the sludge drying technology of the present invention was adopted for technical transformation, a...

Embodiment 2

[0046] A fertilizer factory in Nanjing produces about 30 tons of wet sludge per day. In the past, the traditional sludge steam drying technology was used for sludge drying treatment. The water enters the wastewater treatment tank for re-treatment; its direct operating costs are as follows: 1) Steam cost Generally, about 0.85 tons of steam is needed to dry 1 ton of wet sludge, and the unit price of steam is 260 yuan / ton, so the steam cost is E 1 =0.85*260=221 yuan / ton; 2) The electricity fee is 1.25 tons of wet sludge per hour, the operating power of the sludge lifting device is 1.5kw, the stirring power of the dryer is 37.5kw, water film dust removal, comprehensive oxidation treatment device, induced draft fan The operating power is 12kw, the total operation is 51kw, and the electricity fee is calculated at 0.8 yuan / ton, then the electricity fee is E 2 =51*0.8 / 1.25=32.6 yuan / ton. Total E=E 1 +E 2 =253.6 yuan / ton.

[0047] Using the MVC sludge drying technology of the prese...

Embodiment 3

[0064] A feed factory in Nanjing produces about 23 tons of wet sludge per day. Previously, the sludge steam drying technology was used to dry the sludge. The water vapor discharged from the dryer was discharged through the exhaust gas comprehensive oxidation and purification device after being dedusted by the water film, and the dedusted water entered The waste water treatment tank is re-treated; its direct operating costs are as follows: 1), steam cost Generally, drying 1 ton of wet sludge requires about 0.6 tons of steam, and the unit price of steam is 260 yuan / ton, so the steam cost is E1=0.6*260=156 Yuan / ton; 2) The electricity fee is 0.6 tons of wet sludge per hour, the operating power of the sludge lifting device is 1.5kw, the stirring power of the dryer is 15kw, the operating power of water film dust removal, comprehensive oxidation treatment device, and induced draft fan is 8kw, and the total operation is 24.5 kw, the electricity fee is calculated at 0.8 yuan / ton, then ...

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Abstract

The invention discloses a sludge MVC evaporation drying system and a method for drying sludge, wherein the sludge drying system is composed of a sludge drying machine, an MVC system and a deodorizing system; the MVC system is composed of a water film dedusting device , steam adding device, steam compression device. After the sludge is conveyed to the system, it is first sent to the drying device for drying, and the water vapor that is dried is sucked into the vapor compression system for compression after being dedusted by the dust removal system. After compression, the pressure and temperature of the water vapor increase, and then It is sent to the drying device as a steam heat source for recycling. After drying and heat exchange, the water vapor becomes condensed water with a temperature of nearly 100°C, which enters the water film dust removal system as supplementary water, and finally enters the sewage treatment system. The non-condensable gas is sent to the deodorization system to be discharged after comprehensive oxidation treatment. This system maximizes the recovery of the heat energy in the secondary steam, which greatly reduces the operating cost. Compared with the current sludge steam drying technology, it is a revolution and suitable for popularization.

Description

technical field [0001] The invention belongs to the technical field of sludge deep dehydration, and in particular relates to a sludge MVC evaporation drying system and a method for drying sludge. Background technique [0002] Sewage treatment plants produce a large amount of sludge during sewage treatment. In sewage treatment plants, belt filters are generally used for dehydration. After dehydration, the moisture content of sludge is generally about 80%. The final disposal of these sludges generally has the following methods: (1), landfill; (2) incineration; (3) composting, etc. A moisture content of 80% appears to be too high for any final disposal route. [0003] There are currently two most commonly used sludge deep dehydration technologies: (1) high-pressure plate and frame; (2) steam drying. Among them, the high-voltage plate frame is the current mainstream. Compared with steam drying, the biggest advantage of the high-pressure plate frame is that the operating cost ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12
Inventor 吉宏
Owner 上海故陈技术开发中心
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