New closed condensate recovery machine
1. Company Profile
Shanghai Qihuang Energy Saving Equipment Co., Ltd. is a comprehensive enterprise specializing in the development, production and sales of environmental protection and energy saving technologies. Relying on the technical advantages of Shanghai ’s colleges and universities and Shanghai Boiler Research, it is currently in the energy-saving transformation of boilers and industrial furnaces. The utilization of waste heat and other aspects are at the domestic leading level. In the Yangtze River Delta region, there have been more than 800 kilns and boilers successfully transformed by our company, with a total of more than 1,000 units. It is at the domestic leading level in terms of condensate recovery, frequency conversion power saving, and flue gas desulfurization and dust removal projects.
The company is located in Shanghai Pudong New District, a dazzling oriental pearl. The company has 4 boiler energy-saving experts and 12 product development engineers. The production plant covers an area of 500 mu. It has its own office building in Pudong New District. The company has a professional transportation team installation and after-sales service team, we take "all for energy saving" and "all for customers" purposes.
We are committed to building an excellent enterprise and creating an excellent brand. In the development of Qihuang people, they continue to increase technological innovation, always use domestic leading production equipment, production technology and scientific management, and serve customers with first-class products. The company has achieved rapid rise. On the road of development, we Qihuang people grow up healthily and rapidly. We insist on forging ahead and strive towards higher and further goals. Looking forward to working with new and old friends to create a brilliant tomorrow! We always aim at energy saving and efficiency enhancement, mutual benefit and common development of enterprises.
2. Overview
Condensation water is produced by steam in the process of heating and transportation, so it not only has good water quality but also contains a lot of heat. Sealed condensate recovery device is an important equipment of steam condensate recovery system. It is widely used in dyeing and finishing weaving, petrochemical, medicine, food, thermal, metallurgy, rubber, automobile and other industrial departments and steam boiler condensate recovery systems in restaurants, hospitals, shopping malls and other units. It plays an important role in reducing waste of resources and environmental protection.
3. System principle
(1). The closed steam condensate recovery system is mainly composed of: boiler, indirect steam equipment, steam trap, recovery pipe network, water collection tank, high temperature condensate recovery device and electrical control system. Its working principle is that the saturated steam is sent from the boiler to the steam indirect heating equipment, and the latent heat of vaporization is released to form saturated water, which is quickly discharged by the steam pressure through the steam trap, lifted into the overhead pipe network, and concentrated into the water collection tank. The pressure of the water collecting tank can be calibrated by the pressure regulator according to the steam pressure of the equipment, the amount of condensed water and the resistance of the return water network. When the condensate in the water collection tank reaches a high water level, the high-temperature condensate recovery device automatically starts, and the return water is input into the boiler or sent to the deaeration tank or other heat-using places according to the enterprise's situation. When the water level in the water collection tank reaches the low water level, the recovery device automatically stops running. If during the pumping process of the recovery device, the boiler water level reaches the warning water level without the need for water replenishment, the recovery device will automatically send the water into the softened water tank.
(2) Condensate recovery device. The condensed water recovery device is composed of a high-temperature centrifugal pump, a self-operated pressure regulating valve, an injection pressure regulating valve, an exhaust device, and a booster device to achieve the purpose of preventing cavitation.
4. Design features of closed steam condensate recovery device:
(1) The use of traps in the closed recovery system should be based on the purpose of discharging water in a timely manner without affecting the heat rate of the equipment to prevent water hammer and damage to the equipment. The steam trap not only can discharge condensate continuously and timely, but also keep the steam tight and leak-proof, which plays the role of "steam blocking drainage", thus saving energy.
(2) Compared with the open recovery system, the design of the return water pipe network of the closed recovery system has the following characteristics: the diameter of the return water pipe is small, and the return water pipe network is overhead. A return pipe.
V. Economic benefit analysis The energy-saving effect of the closed steam condensate recovery device is mainly obtained from the following two aspects:
(1) Put an end to the steam leakage loss caused by steam equipment not installed with traps or with poor trap performance. Generally, the steam leakage rate of steam equipment used by many enterprises can reach 5-30%, and some even as high as 50%. The enthalpy of saturated steam at the same pressure is four times that of saturated water, and saving 1 kg of saturated steam is equivalent to recovering 4 kg of heat from saturated water at the same pressure. Therefore, the steam leakage loss of the equipment is quite alarming and wasteful.
(2) The recovered high-temperature condensate directly enters the boiler, increasing the boiler water temperature. The heat contained in the condensate water is usually about 15-20% of the steam heat. If the condensed water is sent directly back to the boiler, this part of the heat can be fully utilized, thereby saving fuel and achieving energy-saving purposes. In addition, the recycling of demineralized water saves water resources and also saves demineralized water treatment costs.
(3) Condensate recovery value = raw water cost + soft water (desalination) cost + deaeration cost + calorific value + sewage cost
6. Necessity (value) of closed condensate recovery
1. The condensate has a high temperature, and the production process is generally higher than 100 ℃. Through effective recovery, it can reduce the temperature difference in the drum, avoid the thermal expansion and contraction of the boiler, reduce the imbalance of stress, and extend the service life of the boiler. And the enthalpy of condensate water accounts for about 20% -25% of the total enthalpy of the new steam, which greatly reduces the fuel cost;
2. The water quality of the condensed water is very pure, does not contain chemical ingredients that produce scale, and does not need to be softened or desalted. It is close to the soft water index, and there are no corrosive gases such as dissolved oxygen and carbon dioxide, and no corrosion. If it is recycled, it can save a lot of cleaning costs, water costs, water treatment costs, and the boiler is effectively maintained.
3. Effect drawing of closed recycling:
7. Performance and advantages of sealed condensate recovery
1. High efficiency This equipment uses a unique device to make condensate operate under high temperature and closed conditions. The condensate and secondary steam are all recycled, which improves the condensate recovery rate and boiler feed water temperature.
2. Energy-saving and environmentally friendly closed recycling, without any form of secondary flash steam and hydrophobic steam leakage, all thermal energy and water resources contained in all condensate water are recovered, and the condensate recovery rate can be as high as 90%, while heating equipment can be improved The heat utilization rate is 10-25%, which can save 20-25% of fuel, reduce the emission of harmful substances such as carbon dioxide, sulfur dioxide, smoke and dust, and reduce thermal pollution and noise pollution.
3. High degree of automation The equipment adopts an intelligent automatic control system and adopts a closed backwater automatic management device. It is suitable for general-sized boilers, with stable and reliable operation and simple and easy maintenance.
4. Elimination of cavitation The device uses a series of advanced cavitation elimination techniques based on the principles of fluid mechanics and micro-supercooling, combined with the characteristics of dynamic two-phase flow of steam and water, to completely eliminate the cavitation problem of the condensate pressurized water pump, so that the pump is in The best state for conveying single-phase high-temperature liquids.
5. Reducing corrosion and prolonging the life After the condensate is confined and recovered, it can eliminate the contamination of condensate with oxygen, carbon dioxide and other dissolved gases, eliminate oxygen corrosion, and prolong the service life of equipment and pipelines.
6. Short cycle and good economic benefits. The equipment is energy-saving, water-saving, investment-saving, purifies water quality and prolongs the service life of boilers, pumps and other equipment, and boiler output. After the equipment is put into operation, the entire investment can be recovered within 3 to 12 months.
8. Annual economic benefits of different boiler types
