Double tank double pump steam recovery machine
The condensate recovery device is also called a steam recovery machine, a condensate recovery device, a steam condensate recovery device, a condensate recovery device, a closed condensate recovery device, etc., and is a main device for recovering condensed water in a steam heating system, and is separately recovered. Both closed and closed recovery, the open recovery effect is low, and the content is low, so it is not covered here. Here we mainly introduce the steam recovery machine in the closed recovery system. 1. Steam heating system: It includes a steam water supply system and a steam recovery system. The success of a steam heating system design depends on whether the steam recovery machine can have a high condensate recovery rate, and can fully utilize the heat of the condensate and whether the system is stable and reliable. The traditional condensate recovery is that the condensed water is discharged from the heat equipment, enters the open condensate tank through the steam trap, and is sent back to the atmospheric heat deaerator in the boiler room by the condensate pump, and is mixed with the softened oxygen to remove the oxygen. The feed water pump is sent to the boiler. In this open system, the condensed water is flashed into the open condensate tank; on the one hand, the flash steam escapes into the atmosphere to cause the loss of condensed water, on the other hand, the condensed heat taken away by the flash steam causes the temperature of the condensed water reduce. Therefore, the open condensate recovery system not only causes the loss of heat energy and condensed water, but also causes the secondary steam that escapes the atmosphere to cause thermal pollution to the surrounding environment. In order to solve this problem, our scientific research personnel, after years of practice, have developed and produced a suitable system for various working conditions on the basis of the current domestic and international "liquid-liquid injection" and "pneumatic water return" technologies. The "high temperature steam recovery machine" overcomes the problem of conveying the two-phase flow of steam and water. The equipment structure has been scientifically and rationally configured, and the condensate recovery equipment product has realized the operation mode of intelligent operation and management automation. Second, the working principle of the condensate recovery device When the system is running, the condensed water is discharged from the hot equipment and enters the steam recovery machine through the steam trap. The steam recovery machine is composed of a flash tank, a decontamination device, a condensed water quick discharge device, a pressure balance device, a cavitation eliminator, a water storage tank, and a liquid level transmission sensor. When the high-temperature condensed water enters the flash tank, the steam-water separation is carried out in the tank, and the condensed water flows into the water storage tank through the quick-discharge device, and the secondary gas is sent to the condensate water pump outlet pipe through the ejector device, so that the flash steam can be sealed and recovered. Due to the continuous elimination of gas and liquid in the flash tank, the pressure in the flash tank is always kept lower than the pressure of the condensate drain of the hot equipment, thus ensuring that the back pressure of the return water can be smooth even at the bottom. enter. The flash tank and the water storage tank are connected by a quick discharge device, and in order to allow the condensed water to quickly flow into the water storage tank, a pressure balance device is operated in the tank. Under normal circumstances, the working pressure of the steam recovery machine is set below 0.1 MPa. In the actual selection, the working pressure of the tank should be selected to the corresponding working pressure of the tank, so that the inside of the tank is always sealed and the atmosphere is not accessible. The vapor and liquid two-phase fluid in the water storage tank is adjusted under the pressure balance device to form a certain pressure on the liquid surface, and the condensate water pump is changed in the process of sucking the high temperature condensed water through the cavitation eliminator. The conditions under which the pump cavitation occurs ensure that the entire return water does not cavitation under the closed operating conditions. According to the actual needs of the working conditions of each system, we divide the pump operation mode according to this equipment into two types: one is continuous motion, the requirements of the main team water supply continuity are quite strict, and the operation mode adopted; For intermittent operation, the pump is set according to the fullness of the condensate in the tank. The steam recovery machine has manual and automatic two-fold control modes in the same electrical control cabinet. When the automatic setting is set, the water pump starts at a high liquid level and stops at a low liquid level. When the water level in the water storage tank exceeds the high water level line, the water pump Start, the pump stops when the water level reaches the lower limit. If a system fails, an audible and visual alarm will be automatically issued. During normal operation, the two pumps will switch periodically. Third, the characteristics of the condensate recovery device 1. Strong installation flexibility: the steam recovery machine can be installed at the beginning of the return water pipe, or can be installed underground in accordance with the layout of the steam equipment. 2. Anti-cavitation: The steam recovery machine uses the original cavitation elimination device to prevent the pump from cavitation and make the steam recovery machine operate under high temperature and closed conditions. 3. Small size: This product is electromechanical integration, small in size, easy to transport, small in floor space, convenient to install and use, and reduce civil construction investment. 4. Energy saving and environmental protection: The steam recovery machine can fully recycle the condensed water, increase the boiler feed water temperature, increase the boiler efficiency, save 20% fuel, save 20-80% of water, and reduce the investment and operation cost of water treatment equipment. It reduces the thermal pollution and noise pollution of secondary steam emissions and the emissions of smoke pollution S02, NOX, etc., and reduces environmental pollution.
