System for recovering methanol and wastewater heat in production of trademark material

Abstract

The invention discloses a system for recovering methanol and wastewater heat in the production of a trademark material. The system which comprises a wastewater storage tank, a recovery tower, a steam input tube, a steam amount automatic adjustment mechanism, a methanol recovery device, a heating pot and a wastewater processing device is characterized in that the first inlet of the wastewater storage tank is connected to a production wastewater discharging tube, the top outlet of the wastewater storage tank is connected to the top inlet of the recovery tower, the steam input tube is connected to the bottom inlet of the recovery tower, the bottom outlet of the recovery tower is connected to the second inlet of the wastewater storage tank through a hot water pump, the top outlet of the recovery tower is connected to the methanol recovery device, and the steam input tube is provided with the steam amount automatic adjustment mechanism; and several end-to-end water tubes are arranged in the heating pot, the external of the water tubes is a heating chamber, front ends of the water tubes are a tap water inlet, rear ends of the water tubes are a hot water outlet, the heating chamber is provided with a wastewater inlet and a wastewater outlet, the bottom outlet of the wastewater storage tank is connected to the wastewater inlet of the heating chamber, and the wastewater outlet of the heating chamber is connected to the wastewater processing device. The system has the advantages of control accuracy improvement, methanol recovery effect improvement, full energy utilization, and energy saving, so energy saving and emission reduction effects are reached.

Description

【Technical field】 [0001] The invention relates to a trademark material production system, in particular to a system for recovering and reusing waste water heat and methanol in the waste water during the production process of the trademark material. 【Background technique】 [0002] Trademark materials are widely used in clothing, home textiles, boots and hats, toys and other industries. The production process of trademark materials is to use gray fabrics such as nylon, polyester fiber, acetate fiber, blended, pure cotton fabrics and non-woven fabrics, and obtain trademark materials after coating, washing, drying, finishing, cutting, etc. process. [0003] A large amount of wastewater containing methanol will be produced in the production process of trademark materials. After the wastewater enters the wastewater storage tank, the methanol enters the recovery tower from the top. After the high-temperature steam is introduced into the recovery tower, the methanol enters the reco...

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Problems solved by technology

[0004] At present, there is a manual regulating valve at the steam inlet to adjust the amount of steam to control the temperature and pressure in the recovery tower. This adjustment and control method not only requires special personnel to take care of the operation, which wastes manpower, but also the operation process is complicated. The control and adjustment effect is poor, so that the actual temperature in the recovery tower often deviates greatly from the required temperature, which affects the methanol recovery effect

[0005] The waste water generated in the production process contains heat. After the waste water is used to recover usable substances (methanol, etc.) through the recovery tower, it is generally discharged directly after waste water treatment. In addition, the steam introduced into the recovery tower is also passed through Waste water is discharged directly after treatment, and the production process of trademark materials itself requires a large amount of heated hot water. Therefore, a lot of heat is wasted and a large amount of energy is consumed in the entire production process, which is not conducive to energy saving and reduction. Row

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