Cold storage energy saving is very promising. The choice of power distribution design transformers For small and medium-sized cold storage, in order to simplify the design, the substation is often not installed indoors, but the power is supplied by the substation on the outdoor pole. Only the low-voltage distribution room is installed indoors. The choice of transformer model should be combined with the transformation of urban and rural power grids, and the low-power s9 series and SH amorphous alloy series transformers should be selected as the main operating transformers. Since the SH series transformers are maintenance-free, this greatly improves the reliability of the power supply and reduces maintenance costs. The selection of low-voltage power distribution equipment is based on the development status of low-voltage power distribution equipment in China and the operating conditions of low-voltage power distribution equipment in rural enterprises. The low-voltage power distribution equipment can be selected as a fully enclosed GCD-type low-voltage power distribution panel with GCL-type power factor automatic compensation screen. . This not only facilitates the safe maintenance of electricity, but also improves the power factor in a timely manner. Because the seasonality and production fluctuation of the cold storage load are very large, the automatic power factor compensation screen can keep the average power factor of the cold storage above 0.85, which improves the load capacity of the transformer and effectively saves energy and capacity of the main switchgear. . Selection of starting equipment At present, the construction standard atlas and the compressor starting equipment widely used by manufacturers are traditional “Star-Triangle†decompression starters, such as the xQ01 type.
Although it is conducive to the compressor console, the starting current of the decompression starter cabinet is too large (about 51.), and there is a sudden change in voltage during the start-up conversion process, which has a small impact on the distribution transformer and equipment. Moreover, this kind of equipment can be combined with the compressor to adjust the function to carry out decompression and energy-saving operation, and the economic benefit is considerable, and it is necessary to vigorously promote the application. In addition, large-scale motors such as cold storage circulating pumps should also use such constant-current soft-start equipment to optimize the distribution of the entire system of the cold storage. Of course, in view of the high-order harmonic effects that such constant-current soft-start devices can cause on electronic devices, it is conceivable to use a bypass contactor to short-circuit them at the end of the start-up.
Self-control design of quick-freezing cold storage automatic control is an important aspect to improve food quality, achieve energy saving and management automation. According to the refrigeration process, it is divided into warehouse system, nitrogen pump system and computer room system. The warehouse system warehouse system is divided into warehouse temperature control system, warehouse defrost system and warehouse temperature telemetry system. Kuwen telemetry and adjustment is an important part of refrigeration automation, requiring higher measurement accuracy and more accurate temperature adjustment.
Due to the cold inertia of the cold storage, the storage temperature varies by about 1 lb. When there are more warehouses, the timing controller can be used with a set of control instrument patrol control to save the space of the main control panel, which is convenient for management and maintenance. For the cooling room, because the cooling materials (such as fruits and eggs) have strict requirements on the temperature and relative humidity of the storage, the temperature difference between the surface temperature of the evaporator and the warehouse should be controlled to be too large, otherwise the dehumidification capacity of the evaporator will increase. The relative humidity in the library will be low, which is not conducive to the preservation and antifreeze of the cooling. Of course, the small and medium-sized cold storage in the current village is mainly manual. Since the use of smooth coils is reduced, it is mainly referred to here as the cooling of the air cooler. It is better to use a water-cooling method for the cooling of the air-cooler. It should be pointed out that if the freezing system of the intercooler is used for automatic operation and the TDS-04(05) fusion time program controller is used, the release of the defrost command should be based on the pressure sensor (micro differential pressure) for freezing the food containing large water content. The controller sends out the request, which is executed by the attendant according to the storage temperature detected by the Kuwen telemetry system; for the pre-cooled food, it can be directly executed by the micro differential pressure controller.
The above is only a brief introduction to the main points of small and medium-sized cold storage power distribution and automatic control design. With the improvement of production automation, in order to meet the requirements of self-control design, it is still possible to implement full-automatic control of the respective control units, using microcomputers. Timing turns on the control power of each automatic control unit, and controls each automatic control unit to automatically control according to its own rules, so that the refrigeration system operates under optimal conditions. In the actual design, the self-control design can be simple and simple, and should be based on specific projects. When the self-control requirements are high, a control room should be provided, and the control panel should be selected. At this time, the control and signal feedback devices of the peripheral circulating water pump, cooling tower fan, cooling fan and even valves should be installed on the control room control panel. The self-controlled component power supply can be supplied by a control transformer. For the convenience of operation, pumps, chillers, valves and other equipment should also be equipped with on-site operation boxes to achieve remote control. For equipment such as warehouse air curtains, it is necessary to cooperate with the civil engineering design.
XTQC series Hydraulic Dumper is truck bulk material unloading device that integrates electric and hydraulic control, and is widely used for bulk materials like grain, forage, cement and coke. The equipment improves production efficiency, saves unloading cost, and creates good economic benefit for the user.
Our company starts to design and produce hydraulic dumper since 1990's, and now is the largest manufacturer of that in China, that has the largest market share in China. Our company is the only drafter of national standard of hydraulic dumper GB/T 21489-2008 [Bulk Grain Truck Unloading Device". The product is exported to various countries and areas such as Japan, Vietnam, Malaysia, Thailand and India.
Hydraulic dumper is suitable for automatic unloading of bulk materials like grain, forage, cement and coke, and can be used in industries of chemical, metallurgy, mining, port and coal.
Hydraulic dumper mainly consists of dumping platform, wheel blocking mechanism, main hydraulic oil cylinder, wheel stopper, hydraulic control system, and electric control system.
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