Design and installation of air-conditioning water system in purification plant
Design and installation of air-conditioning water system in purification plant
The air-conditioning water system usually uses hot-dip galvanized steel pipe and seamless steel pipe, and small and medium-sized projects also use PPR pipe and copper pipe; the most commonly used valve in the air-conditioning water circuit of the purification plant is the regulating valve. There are three general regulating valves: Copper gate valve, copper ball valve, butterfly valve, copper ball valve are mostly...
Text label: Design and decoration of purification plant, purification plant air conditioning water system
Design and installation of air-conditioning water system in purification plant
The air-conditioning water system usually uses hot-dip galvanized steel pipe and seamless steel pipe, and small and medium-sized projects also use PPR pipe and copper pipe; the most commonly used valve in the air-conditioning water circuit of the purification plant is the regulating valve. There are three general regulating valves: Copper gate valve, copper ball valve, butterfly valve, copper ball valve are mostly used in occasions where shut-off is the main purpose and adjustment is the secondary purpose. It is mostly used for occasions with a diameter of 100 or more and the purpose of controlling flow and shutting off; the valve must be tested before use to determine its resistance and sealing performance. The resistance test pressure is 1.25 times the nominal pressure, and the sealing test is 5 minutes. It is observed that the valve body has no deformation and leakage, and the pressure does not drop to be qualified; close the valve and do a tightness test at the nominal pressure, requiring no leakage for 5 minutes to check the tightness of the valve closing.
In order to prevent the blockage of the water pipeline system and ensure the normal operation of various equipment and valves, a water filter must be installed in the pipeline to remove and filter the debris and scale in the water, usually the water filter is installed in the suction pipe of the water pump and The part of the inlet pipe of the terminal equipment, before and after the water filter, should be provided with a gate valve for it to be cut off from the water system during regular maintenance. The exhaust device generally adopts an automatic exhaust valve with a shut-off valve on it to facilitate maintenance and manual rapid exhaust. The exhaust valve should be installed at the downstream and high point of the water flow direction, so that the exhaust effect is better; After a period of time, it needs to be disassembled and cleaned. If there is air in the system, the outlet pressure of the pump is unstable and shakes. If the water system has the phenomenon of air pockets, the pump will be idling and the water pump will be burned; A drain valve is installed between the inlet and outlet of the unit. When air pockets occur, the return water valve is closed, the outlet valve is closed, and the outlet drain valve is opened to drain and exhaust air to drive the air out of the system; after the system is emptied of water , when refilling water, first close the water inlet valve to let the air out of the place; after refilling water, slowly open the unit outlet valve when turning on the unit for the first time to prevent the flow rate from being too fast, and the air stored in the pipeline will return to the pump inlet of the unit at one time , to generate air suction; install an exhaust valve on the suction pipe of the pump. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for purification workshops and clean workshops, with professional technology, rich experience and affordable prices.
Air conditioning cold and hot water pipes and condensate pipes need to be insulated. It is most convenient to use insulation sleeves for insulation. The insulation material can be selected by yourself. Rubber and plastic insulation materials are used. The thickness of the insulation layer can be 20-25mm. When the glass wool with aluminum foil veneer is used for thermal insulation, the thickness of the thermal insulation layer can be 25-40mm. In order to better isolate the radiant heat, anti-corrosion and waterproof penetration, it is necessary to wrap the air-conditioning thermal insulation tape on the outer layer of the thermal insulation tube shell. The differential pressure control is that the differential pressure control valve is installed between the chilled water tank and the water collector. When the pressure difference between the supply and return water main pipes exceeds the set value, part of the chilled water is bypassed, and the pressure difference between the supply and return water is stabilized at the set value. Generally, the set value of the pressure difference control device of the central air-conditioning system is 0.15-0.2MPa; function: to stabilize the pressure difference between the supply and return water, so that the amount of water returning to the chiller remains stable, preventing insufficient water flow, protection of the unit or evaporator. Freeze cracking; prevent the pressure difference of the terminal equipment from being too large, causing noise at the regulating valve, or the pressure difference exceeding the maximum opening of the valve, unable to open the valve, or oscillating; generally, when an electric two-way regulating valve is installed at the end, the water supply and return mains should be Install the differential pressure control bypass valve.
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