Polyester industry uses screw air compressor to compress waste heat regeneration desiccant Gong Hongxiang, Zhou Qingkai Urumqi Petrochemical Company Chemical Fiber Factory, Xinjiang Urumqi 830019 operating costs, energy saving effect is remarkable.

It is well known that oil-free screw air compressors generate a large amount of heat of compression when compressed gas. The air compressor station is designed according to the conventional air compressor station design specification, that is, the compressed air must be cooled to below 45. Then, it is sent to the after-class equipment to escape the drying treatment. In the Ding 1 dry purification treatment, a Roots blower electric heater and a cold blow are required to regenerate the drier. this. The total energy consumption is large. Moreover, a large amount of heat of compression generated when the air compressor is inflated is wasted in vain. How can we save energy and ensure that the desiccant completely desorbs the water and obtains the dry compressed air of acceptable quality? It is the heat generated when the gas is compressed, and the desiccant in the drying tower is heated to desorb the water. The drying device consumes little energy and greatly reduces the operating costs of the drying unit. The innovation of the waste heat regenerating desiccant is to use the air compressor to compress the heat energy. Therefore, it can be said that the waste heat regeneration desiccant can achieve the purpose of energy saving.

The precondition of the residual heat regenerating desiccant is that the temperature of the compressed heat generated by the air compressor is not less than 1050; 2 the compressed gas produced by the air compressor does not contain oil. The air compressor station process is that the air is removed from the suction cylinder through the dust filter to remove suspended particles and impurities, and is distributed to the oil-free screw air compressor through the air intake manifold, and compressed to not more than 75, 4 temperature is 180210, which is difficult to care for.澹, 倬, 罄淙, the device is cooled to a temperature of not higher than 450 gas, through the adsorption of alumina 03 in the drying tower, remove the moisture in the gas, the dew point is not higher than 401; after the oil-free dust-free dry air, Enter the gas storage tank and then supply it to the relevant production equipment. Therefore, the air compressor station can meet the working conditions of using the waste heat regeneration desiccant.

2 technical remodeling scheme of compressed waste heat regenerating desiccant 21 Working principle of drying system of B 408 is the sum; the tower is working, the other tower is regenerating, the 81 knife is changed once, and the work is alternated. When the manual control is switched, one ± bridge works, the other tower regenerates, the regeneration system works automatically, the electric heater starts, and the air passes through the suction filter duffler, which is blown by the Roots blower to the electric heater, which is an electric heater. Provided, 4 cubits are sent to the regeneration tower, and the desiccant aluminum glue in the tower is heated and analyzed. The water is dried and the active electric heater is restored. When the temperature of the lower tower reaches 7080, the electric heating work stops working; the electromagnetic pilot valve controls The cold-blowing valve is opened, and after passing through the orifice plate, it becomes a 022 river, and the cold air blows the cold-blowing of the regeneration tower. When the temperature in the regeneration tower drops to 50, the cold blowing ends. Once the entire regeneration is complete, you can move on to the next work cycle.

22 Reconstruction plan Since the oil-free screw air compressor is compressed by the stage and becomes compressed hot air of 1802200,075,3, between the safety valve and the expansion joint of the outlet of the stage cylinder, the date of receipt of the treaty is 2010讥51. The pipeline is led to the hot air of the original 2408 drying system electric heater 05,1, enters the regeneration tower, and the desiccant aluminum glue in the tower is heated and analyzed to compress the residual heat control valve; the cold-blowing valve controlled by the electromagnetic pilot valve is manually opened. After the orifice plate becomes 0 221, the cold air blows the cold water to the regeneration belt. When the temperature in the regeneration tower drops to 50, the cold explosion ends.

The cold blow valve is manually closed and the entire regeneration is completed. The Roots blower and electric heater that were run during the re-drying of the milking and drying system in the previous working cycle can be deactivated, and the equipment can be prepared less.

23 Operation method The specific operation method is to close the Roots blower outlet valve; confirm the Roots blower bypass valve to close the drying tower control cabinet power switch; slightly open the single machine vent valve to reduce the switching pressure; press the electromagnetic manual switch button to open the compression residual heat control The valve is controlled according to the system supply air pressure to control the residual heat control, and the opening degree micro-opening regeneration tower is adjusted to the previous stage. The cold blow valve controlled by the electromagnetic pilot valve is manually opened by the closed compression heat control; the cold blow valve is closed, and the regeneration is completed, and the next working cycle can be transferred. 24 process flow compression waste heat regeneration desiccant process 1.

3 Economic Benefits Evaluation 4, 13 such as 41 oil-free air compressor power is 280 tears, 1 year 365 working days, 3 oil-free screw air compressors run 24 times a day, 3 dryer Roots blowers and electricity The average heater is about 9 hours per day; the electricity price is 22 yuan, and the 3 dryers of the 3408 regenerative drying unit regenerate about 9 1 per day and then blow the gas for a cold blow. The negative electric heater power of the rated treatment capacity is 612 1 View, blower power 185, 3 dryers on average about 9 regeneration per day. Regeneration cold blow air consumption on average is the rated treatment heat.

The annual electricity consumption of the equipment is 797, and the annual electricity cost of the equipment is 33. The heat recovery and regenerative desiccant technology transformation cost is low.

4 compression waste heat regeneration compressed air dew point temperature detection only, 25, 16 flange 10 pieces, a total investment of about 1 000 yuan, investment in compressed air dew point temperature detection 1.

Before the switch is switched after the dryer switch, the conclusion is that under the same conditions, the compressed waste heat is regenerated and dried, the operation is simple, and the maintenance is greatly reduced. After the regeneration of the drying agent, the dew point temperature of the compressed air can be reduced to below 45, satisfying the dew point temperature of 40, the requirements of the process index, and ensuring the quality of the compressed air. More importantly, the operation cost of regenerative drying using compressed waste heat is very low, saving 17.3 million yuan compared with the blast-type external heating regenerative drying device and reducing the maintenance cost of the Roots blower electric heater, and the energy saving effect is remarkable.

The Sakamoto Chemical Fiber Association exhibited at the 12th Eco-Products Exhibition 2 in Japan, which was held in Tokyo on December 9th, 2010. The exhibition is the largest environmental exhibition in Japan by industry. Organized by the Environmental Management Association and the Nihon Keizai Shimbun. The 8th company of the Japan Chemical Fiber Association, Teijin Toray Co., Ltd., was transformed into a special exhibition of the genus Seychelles.

The booth of the Sakamoto Chemical Fiber Association is the second hall of the East Exhibition Hall. No. 2, 57. This year is the future of chemical fiber creation. The following four areas of the ecological technology cycle human technology are exhibited as follows: Chemical cycle technology of chemical fiber polyester and nylon.

2 Humans introduce various comfort functional materials such as temperature and sense of cold ventilation control, and carry out actual body feeling.

The technology is centered on water treatment technology.

In the future, lightweight lightweight carbon fiber composite lightweight mats will be introduced to contribute to the greening of chemical fiber products.

Wang Decheng's contribution to Spain 0 India 1 company purchaser 犷 圮 8 83 feet, Ding Leibaiban dry 5 oil and 1 work stinky 0 heart 3 company not signed at the end of 2010, the initial focus of the announcement of the European leading, joint deduction This acquisition will expand the polyester value chain in the 1;1 group petrochemical business. The company is located near the factory in the southern part of Spain, and the device produces Dingjing for the clumsy acid ten to possess the capacity of the million. It has 550,000 units in the Canadian Lemur.

Qian Bozhang contributed.

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