Heat Exchanger Equipment
Plate heat exchanger unit
The series of water-water intelligent plate heat exchanger units produced by Shandong Youxin HVAC Group Co., Ltd. are intelligent complete sets of equipment manufactured in strict accordance with the CJ / T191-2004 standard of the urban construction industry of the People ’s Republic of China. A generation of energy-saving products. The product is widely used in urban centralized heating, intelligent buildings, and high-intelligence heating units for industrial and mining enterprises. It has the characteristics of advanced technology, beautiful appearance, reasonable structure, less floor space, and high heating efficiency. It can operate in full intelligence, and can realize the adjustment of "quality" and "quantity" according to the indoor and outdoor temperature, to achieve the best energy-saving effect of on-demand supply. The unit has multiple control methods, such as automatic measurement, water temperature adjustment, frequency conversion operation, remote monitoring, liquid crystal display, storage and printing data. Our company can choose a scientific and reasonable configuration according to the customer's heating conditions.
1. Unit composition structure:
The heat exchange unit is mainly composed of a plate heat exchanger, a circulating water pump, a supplementary water pump, a control system, intelligent instruments, valves, cables, and a rack.
2. Scope of application:
Radiator heating, floor heating, air conditioning heating, constant temperature water supply, process cooling, life bath, etc.
3. Reference to manufacturing standards
1. The supply of goods complies with the current national, local, and industry-related standards, and there is a contradiction between any content that constitutes the contract document and the national, local, or industry standards. Our company asks you to clarify in writing unless you have special instructions. The company implements the most stringent standards.
2. The supply of goods conforms to the relevant written descriptions in the design drawings and other design documents, and guarantees to meet the overall engineering quality level and related regulations.
3. Other requirements:
Manufacturing and inspection standards include but are not limited to:
"Plate Heat Exchange Unit" GB16409-1996
"Code for Construction Quality Acceptance of Building Water Supply, Drainage and Heating Engineering" GB50242-2002
"Code for Construction and Acceptance of Urban Heating Pipe Network Engineering" CJJ28-2004
"Refrigeration Plate Heat Exchanger Unit" JB8701-1998
"Test Methods for Performance of Heat Exchangers and Heat Transfer Elements" Part 3: Plate Heat Exchangers
"Plate Heat Exchanger" NB / T 47004-2009 (JB / T 4752)
"Plate Heat Exchange Unit" (CJ / T191-2004)
"Electrical device installation engineering electrical equipment handover test standard" (GB 50150-2006)
GB / T700 "Carbon Structural Steel"
GB / T707 "Dimensional and weight tolerance of hot-rolled channel steel"
GB / T2887 "General Specification for Electronic Computer Venues"
GB3096 "Standard for Environmental Noise in Urban Areas"
GB / T4942.2 "Protection Grade of Low-voltage Electrical Appliance Shell"
GB / T5117 "Carbon Steel Electrode"
GB / T5657 "Technical Conditions of Centrifugal Pump"
GB7251.1-2005 / IEC60439-1: 1999 "Low-voltage switchgear and control equipment Part 1: Type test and partial type test equipment"
GB / T8163 "Seamless steel pipe for conveying fluid"
GB / T9112 "Types and parameters of steel pipe flanges"
GB / T9878 "Hot rolled equilateral angle steel size, shape, weight and allowable deviation"
GB / T12233 "Universal Valve Iron Globe Valve and Lifting Return Valve"
GB / T12237 "Universal valve flange and butt welded steel ball valve"
GB / T12238 "Universal valve flange and wafer connection butterfly valve"
GB / T12243 "Spring Direct Load Safety Valve"
GB12459 "Steel Butt Welded Seamless Pipe Fittings"
GB / T12668.2 "The second part of the general requirements of low-speed AC variable frequency electrical drive system rated speed electrical drive system"
GB12706.1 "Copper and aluminum core plastic insulated power cables with a rated voltage of 35kV and below, Part 1: General provisions"
GB12706.2 "Copper and aluminum core plastic insulated power cables with rated voltage of 35kV and below, Part 2: Polyvinyl chloride insulated power cables"
GB12706.3 "Copper and aluminum core plastic insulated power cables with rated voltage of 35kV and below, Part 3: XLPE insulated power cables"
GB / T12712 "Technical requirements for steam heating system condensate recovery and steam trap"
GB / T13384 "General Technical Conditions for Packaging of Mechanical and Electrical Products"
GB16409-1996 "Plate Heat Exchanger"
GB50054 "Code for Design of Low Voltage Distribution"
GB50174 "Code for Design of Electronic Computer Room"
GB / T3280-1992 "Stainless Steel Cold Rolled Steel Plate"
GB / T528-1998 "Vulcanized rubber or thermoplastic rubber stretch"
GB12229 "Technical conditions of carbon steel castings for general valves"
GB12231 "Quality Requirements for Valve Steel Castings"
4. Main features of intelligent plate heat exchanger unit
4.1. Advanced technology, beautiful appearance, excellent performance, reliable quality;
4.2. Optimized design, reasonable layout, compact structure, small footprint, saving capital construction investment;
4.3. Using our company's high-efficiency plate heat exchanger, the unit's operating cost is low;
4.4. High-quality components, precision manufacturing, and long service life;
4.5. Various control methods: sub-heating "quality" adjustment type, the annual heat energy saving can reach 20 ~ 30%; heating "quality" adjustment type, the annual thermal energy saving rate can reach 30 ~ 40%, the maximum saving Operating costs. Multiple controls, flexible selection;
4.6. Intelligent, high degree of automation, LCD display, storage, printing various operating data, convenient for on-site monitoring, unattended, easy to operate. According to user requirements, remote microcomputer monitoring and centralized management of multiple units can be realized;
4.7. The system automatically replenishes water, automatically releases pressure, prevents scale and dirt;
4.8 It is easy to install and use. Before leaving the factory, all the final assembly is complete. You only need to connect the cold and heat medium import and export, water replenishment port, and main power supply to put it into operation;
4.9. Simple operation, convenient installation and maintenance;
4.10. The system configuration is flexible, according to your actual needs, scientific and reasonable configuration. The company provides you not only a set of equipment, but also an optimal investment plan that integrates initial investment and operating costs. In short, in your heating and air conditioning heating project, our company always has a product for you!
5. Unit installation
1. The unit has been assembled and tested at the factory.
2. The orientation of the inlet and outlet of the cold and hot side of the unit has been shaped according to the design requirements. When installing the unit, pay attention to the direction of the take-over to facilitate operation. Leave an operating space of not less than 500mm around.
3. The unit can be placed directly on the indoor concrete foundation (100mm above the ground), evenly tightened and fixed with anchor bolts to reduce vibration and noise. Drainage ditches are set around the foundation.
4. Before installation, the unit should ensure the cleanliness of the primary network and secondary network pipelines, and the interior of all takeovers connected to the unit must be cleaned before taking over. Avoid sand, welding slag and other debris entering the unit, causing blockage and damage to heat exchangers and other key equipment.
5. The highest point of the water pipe system associated with the unit should be equipped with an automatic exhaust valve to discharge the gas in the pipeline and equipment.
6. Performance test of the whole equipment
1. Technical requirements of the whole machine
1.1 Appearance requirements
1.1.1 The paint film on the surface of the unit is uniform and smooth, free from defects such as bubbles, cracks and flaking. The control cabinet is dry, clean and free of debris.
1.1.2 The base size error is less than 5 ‰, the equipment positioning center distance error is less than 2 ‰, the equipment installation bolt hole and center line error is less than 2mm, and the horizontal and vertical deviations of the pipeline are less than 10mm.
1. 1.3 The vertical deviation between the sealing surface of the flange and the plane of the center line of the nozzle is not more than 1% of the outer diameter of the flange, and not more than 3mm.
1.1.4 The steam and water flow directions, takeover marks and unit signs are complete and correct.
1.2 Under the design pressure of the unit, the system shall not be damaged or leaked.
1.3 The pressure drop of the pipeline and equipment of the unit: the primary side is not greater than 100kPa, and the secondary side is not greater than 120kPa.
1.4 No noise and other abnormal phenomena when the pump is running.
1.5 The whole test of the control system.
1.5.1 The control system can perform real-time detection of temperature, pressure, flow, heat and other analog quantities, monitor the status of pump start and stop operation, and can complete the comparison of upper and lower limits of corresponding physical quantities, data filtering, etc.
1.5.2 The control system can collect and store the measured parameters according to the set time interval. The stored historical data should not be lost after power off.
1.5.3 After the control system is powered on, it will automatically perform self-check on the key parts. After an abnormality occurs during operation, it can recover to the state before the abnormality.
1.5.4 The control system has calendar, clock and password protection functions.
1.5.5 The control system can be used to select functions, set parameters on site, and set alarms on the site by operating the keyboard.
1.5.6 The control system can automatically control and adjust the heating station and other on-site process equipment to meet the optimal control function of the heating station.
1.5.7 The alarm function of the control system meets the following requirements:
a) The controller supports data alarm and fault alarm.
b) Fault and alarm records are automatically saved, and should not be lost when power is off.
c) When an alarm occurs, there is an alarm display on the controller display and an audible or optical alarm in the control cabinet.
1.5.8 The controller of the 11-level unit can also communicate with the monitoring center in active or passive mode. When there is data alarm and fault alarm, the controller can actively upload the alarm signal to the monitoring center.
2. Test method
2.1 The visual inspection adopts visual inspection and dimensional measurement inspection, and the inspection result meets the requirements of Article 1.1 of this standard.
2.2 Whole machine strength test.
2.2.1 The medium strength test medium of the unit should be water. For the heat exchanger made of austenitic stainless steel plates, the CI-ion content in the water should be less than 25mg / L. The strength test is carried out separately on the hot and cold sides.
2.2.2 The test pressure is 3.25MPa.
2.2.3 The ambient temperature of the test and the temperature of the test water are not less than 50 ° C.
2.2.4 The heat exchanger and pipes are filled with water, and the air release valve should be closed after the air is emptied.
2.2.5 After the system is full of water, first check the system for leaks. When there is no leak, slowly increase the pressure of the system. When the pressure rises to 50% of the test pressure, hold it for 10 minutes. Check the system again for leaks and no leaks. When the system pressure is increased to the test pressure, and maintained for 10 minutes, and then reduced to the design pressure and maintained for 30 minutes, check with pressure.
2.2.6 If the strength test fails, it should be repaired. After the repair, the strength test should be repeated.
2.2.7 After passing the strength test, drain the accumulated water in the unit in time.
2.2.8 Each strength test is recorded and archived.
2.3 Pressure drop test of the pipeline and equipment of the unit. Install pressure gauges at the inlet and outlet of the primary and secondary sides of the unit, and read the difference between the inlet and outlet pressure gauges when operating at the designed flow rate.
2.4 Water pump operation test. Place the unit on the test bench or on site, and connect the water and electricity, and run at the designed flow rate for 30 minutes.
2.5 The whole test of the control system.
2.5.1 The whole test of the control system can be carried out at normal temperature.
2.5.2 Read the parameters such as temperature and pressure on the operation panel of the controller, and directly start and stop the makeup water pump, circulating water pump, solenoid valve, etc. on the operation panel of the controller, increase or decrease the frequency of the inverter, and increase or decrease the electric regulating valve Opening.
2.5.3 Let the controller run continuously for more than two hours, and then restart after power off.
2.5.4 Start the controller.
2.5.5 Check the controller operation panel.
2.5.6 Set the upper and lower limits of temperature, pressure and other parameters directly on the operation panel of the controller, and alarm signals such as overpressure, overtemperature and power failure.
2.5.7 Set the upper limit or lower limit of the water supply temperature and pressure, adjust the opening of the electric valve and adjust the frequency of the inverter, and check the system water supply temperature and pressure.
2.5.8 The alarm is displayed on the operation panel of the controller, accompanied by an audible and visual alarm; the operation of the controller is stopped by a sudden power failure, and then turned on again.
2.5.9 The controller has a communication interface connected with the monitoring center.
3 Inspection rules
3.1 Product inspection is divided into factory inspection and type inspection. The inspection items should meet the requirements of Table 1.
Test method clause
Machine strength test
Pipeline and equipment pressure drop test
Pump operation test
Control system test
Note: J means inspection.
3.2 Factory inspection shall be carried out one by one, and an inspection report shall be issued.
3.3 Type inspection
3.3.1 Where one of the following conditions occurs, type inspection is carried out:
a) Before mass production of new products;
b) When there are major changes in the design, process and materials of the product, which may have a greater impact on the thermal performance and resistance of the unit;
c) When the production is stopped and the production is resumed within one year;
d) When requested by the quality supervision department.
3.3.2 Sampling for type inspection is randomly selected in the finished product, and no less than 1 product of each specification: during the inspection process, if any of the indicators are found to be unqualified, double the sampling in the same batch of products and re-check the unqualified If the project is still unqualified, the batch of products is unqualified.
The production process flow chart of the heat exchange unit is as follows:
ONLINE / MESSAGES