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Plate heat exchanger unit
Small steam fast heat exchanger group
Focusing on a certain time, most employees turn on the faucet at the same time, and need to be able to provide hot water with a stable temperature immediately
In an instant, some employees may turn off the faucet at the same time, and the water temperature needs to be constant.
When you just turn on the faucet, you don’t need to discharge a lot of cold water first.
The water temperature must be safe, and no hot water scalds employees.
The quality of the water should be hygienic, it should not be in direct contact with industrial steam, and it should not be used for hot water with a long residence time.
The heat exchange equipment occupies as little space as possible in the computer room, the equipment fouling rate is low, the amount of maintenance is small, and it has functions such as unattended and alarm notification.
| Model | LZ-50-N- | LZ-200-N- | LZ-300-N- | LZ-450-N- | LZ-1200-N- | LZ-800-N- | |
| Heat load（KW） | 150 | 200 | 300 | 150 | 600 | 800 | |
| Heat source: 4barg saturated steam | Flow rate (KG/H) | 255.9 | 341.2 | 511.7 | 767.6 | 1023 | 1365 |
| Steam pipes | 32 | 40 | 50 | 65 | 80 | 80 | |
| Condensate pipe | 20 | 20 | 25 | 32 | 80 | 40 | |
| Heat source: 95/70℃ high temperature water | Flow | 5.2 | 6.9 | 10.3 | 15.4 | 20.6 | 27.5 |
| Takeover specifications | 40 | 50 | 50 | 65 | 80 | 80 | |
| Secondary side: water 10/60℃ | Flow | 2.6 | 3.4 | 5.2 | 7.7 | 10.3 | 13.8 |
| Takeover specifications | 32 | 40 | 40 | 50 | 50 | 65 | |
| Dimensions | Length*width*height | 1700*800*850 | 1700*1000*850 | 1850*1000*920 | 1900*1200*980 | 1900*1200*980 | 2050*1400*1280 |
| Model | LZ-1000-N- | LZ-1200-N- | LZ-1500-N- | LZ-2000-N- | LZ-2500-N- | LZ-3000-N- | |
| Heat load (KW) | 1000 | 1200 | 1500 | 2000 | 2500 | 3000 | |
| Heat source: 4barg saturated steam | Flow rate (KG/H) | 1706 | 2047 | 2559 | 3412 | 4265 | 5117 |
| Steam pipes | 100 | 100 | 100 | 125 | 150 | 150 | |
| Condensate pipe | 40 | 50 | 50 | 50 | 65 | 80 | |
| Heat source: 95/70℃ high temperature water | Flow | 34.4 | 41.3 | 51.6 | 68.8 | 90.1 | 103.2 |
| Takeover specifications | 100 | 100 | 125 | 125 | 125 | 150 | |
| Secondary side: water 10/60℃ | Flow | 17.2 | 20.6 | 25.8 | 34.4 | 43 | 51.6 |
| Takeover specifications | 65 | 80 | 80 | 100 | 100 | 100 | |
| Dimensions | Length*width*height | 2050*1400*1280 | 2100*1500*1280 | 2100*1500*1280 | 2100*1600*1450 | 2100*1700*1600 | 2100*1700*1600 |
Air conditioning, heating heat exchanger group
| For air conditioning and floor heating systems (10°C temperature difference) | Model | LZ-450-K/D- | LZ-600-K/D- | LZ-800-K/D- | LZ-1000-K/D- | LZ-1200-K/D- | LZ-1500-K/D- | LZ-2000-K/D- | |
| Heat load (KW) | 450 | 600 | 800 | 1000 | 1200 | 1500 | 2500 | ||
| Heat source: 4barg saturated steam | Flow rate (KG/H) | 767.6 | 1023 | 1365 | 1706 | 2047 | 2559 | 3412 | |
| Steam pipes | 65 | 80 | 80 | 100 | 100 | 100 | 125 | ||
| Condensate pipe | 32 | 32 | 40 | 40 | 50 | 50 | 50 | ||
| Heat source: 95/70℃ high temperature water | Flow | 15.5 | 20.6 | 27.5 | 34.4 | 41.3 | 51.6 | 68.8 | |
| Takeover specifications | 65 | 80 | 80 | 100 | 100 | 125 | 125 | ||
| Secondary side: water 10/60℃ | Flow | 38.7 | 51.6 | 68.9 | 86.1 | 103 | 129 | 172 | |
| Takeover specifications | 100 | 100 | 125 | 125 | 150 | 150 | 200 | ||
| Dimensions | Length*width*height | 2100*1650*1280 | 2100*1650*1280 | 2300*1900*1450 | 2300*1900*1450 | 2450*2150*1660 | 2450*2150*1660 | 2650*2250*1850 | |
| For air conditioning and floor heating systems (10°C temperature difference)） | Model | LZ-3000-K/D- | LZ-4500-K/D- | LZ-6000-K/D- |
LZ-10000-K/D- |
LZ-20000-K/D- |
LZ-30000-K/D- |
LZ-40000-K/D- |
LZ-50000-K/D- |
LZ-60000-K/D- |
|
| Heat load (KW) | 3000 | 4500 | 6000 | 10000 | 20000 | 30000 | 40000 | 50000 | 60000 | ||
| Heat source: 4barg saturated steam | Flow rate (KG/H) | 5117 | 7676 | 10230 | 17060 | 34120 | 51170 | 68230 | 85290 | 102300 | |
| Steam pipes | 150 | 200 | 200 | 300 | 400 | 500 | 550 | 600 | 650 | ||
| Condensate pipe | 65 | 80 | 100 | 100 | 150 | 200 | 250 | 250 | 300 | ||
| Heat source: 95/70℃ high temperature water | Flow | 103 | 154 | 206 | 343.9 | 687.8 | 1032 | 1376 | 1719 | 2063 | |
| Takeover specifications | 150 | 200 | 200 | 250 | 350 | 400 | 500 | 500 | 600 | ||
| Secondary side: water 10/60℃ | Flow | 258 | 387 | 516 | 862.6 | 1725 | 2588 | 3450 | 4313 | 5176 | |
| Takeover specifications | 250 | 250 | 300 | 400 | 500 | 650 | 700 | 800 | 900 | ||
| Dimensions | Length*width*height | 2850*2350*1850 | 3300*2350*2080 | 3500*2350*2080 | 定制 | 定制 | 定制 | 定制 | 定制 | 定制 | |
For heating system (25℃ temperature difference) |
Model | LZ-450-N - | LZ-600-K/D- | LZ-800-K/D- | LZ-1000-K/D- | LZ-1200-K/D- | LZ-1500-K/D- | LZ-2000-K/D- | |
| Heat load (KW) | 450 | 600 | 800 | 1000 | 1200 | 1500 | 2500 | ||
| Heat source: 4barg saturated steam | Flow rate (KG/H) | 767.6 | 1023 | 1365 | 1706 | 2047 | 2559 | 3412 | |
| Steam pipes | 65 | 80 | 80 | 100 | 100 | 100 | 125 | ||
| Condensate pipe | 32 | 32 | 40 | 40 | 50 | 50 | 50 | ||
| Heat source: 120/80℃ high temperature water | Flow | 9.7 | 12.9 | 17.2 | 21.5 | 25.8 | 32.2 | 43 | |
| Takeover specifications | 50 | 65 | 65 | 80 | 80 | 100 | 100 | ||
| Secondary side: water 70/95℃ | Flow | 15.4 | 20.6 | 27.5 | 34.4 | 41.3 | 51.6 | 68.8 | |
| Takeover specifications | 65 | 80 | 80 | 100 | 100 | 125 | 125 | ||
| Dimensions | Length*width*height | 2100*1600*1240 | 2200*1750*1280 | 2200*1750*1280 | 2350*1950*1280 | 2350*1950*1450 | 2450*1950*1450 | 2650*2100*1660 | |
| For heating system (25℃ temperature difference | Model | LZ-3000-K/D- | LZ-4500-K/D- | LZ-6000-K/D- |
LZ-10000-K/D- |
LZ20000K/D- |
LZ-30000-K/D- |
LZ-40000-K/D- |
LZ-50000-K/D- |
LZ-60000-K/D- |
|
| Heat load (KW) | 3000 | 4500 | 6000 | 10000 | 20000 | 30000 | 40000 | 50000 | 60000 | ||
| Heat source: 4barg saturated steam | Flow rate (KG/H) | 5117 | 7676 | 10230 | 17060 | 34120 | 51170 | 68230 | 85290 | 102300 | |
| steam pipes | 150 | 200 | 200 | 300 | 400 | 500 | 550 | 600 | 650 | ||
| Condensate pipe | 65 | 80 | 100 | 100 | 150 | 200 | 250 | 250 | 300 | ||
| Heat source: 120/80℃ high temperature water | Flow | 64.5 | 96.7 | 129 | 213.8 | 427.6 | 641.3 | 855.1 | 1069 | 1283 | |
| Takeover specifications | 125 | 150 | 150 | 200 | 300 | 350 | 400 | 450 | 450 | ||
| Secondary side: water 70/95℃ | Flow | 103 | 154 | 206 | 343.9 | 687.8 | 1032 | 1376 | 1719 | 2063 | |
| Takeover specifications | 150 | 200 | 200 | 250 | 350 | 400 | 450 | 500 | 550 | ||
| Dimensions | Length*width*height | 2850*2350*1660 | 3200*2350*1850 | 3200*2350*1850 | 定制 | 定制 | 定制 | 定制 | 定制 | 定制 | |
Water and water heat exchange unit
The source of heat energy of the heating unit
Non-standard units can preferentially use high-temperature wastewater for heat exchange, such as high-temperature steam condensate, and the insufficient part will be heated by steam. This not only saves steam costs, but also saves waste water cooling and discharge costs.
Unit control instructions
The control system collects the temperature and pressure of the primary and secondary sides of the heat exchange unit, the pressure difference of the decontamination device, the outdoor temperature, the flow rate, the manual state of the circulating pump water pump, the operating state, the fault state and other signals, and can This
These signals are uploaded to the monitoring center through the remote terminal control system to realize remote control. Control objects include: secondary side water supply temperature, pressure, pressure difference between supply and return water. …
Commonly used control strategies
(1) The heat exchange unit has functions of climate compensation and horizontal water supply
The programmable controller is used to automatically set the temperature of the two-side water supply according to the change of outdoor temperature and the local heat load curve, and the compensation amount can be set according to the requirements. The measured value of the secondary-side water supply temperature is compared with the set value.
Through PID adjustment, the controller outputs a signal to adjust the electric valve for temperature control
(2) Automatic water replenishment
The pressure sensor installed on the secondary side return pipe measures the pressure signal, which is thicker than the set value and outputs a control command to control the start and stop of the water pump or frequency conversion Constant pressure water replenishment
(3) Automatic pressure relief function
The unit can choose the hot water expansion overpressure in the Jinxin buffer system of the pressure expansion tank;
It is also possible to use solenoid valves to relieve pressure in a waterproof manner;
To ensure absolute safety, both methods are equipped with safety valves
(4) Secondary side supply, return water pressure difference control supply, the return water system needs to be equipped with a pressure difference bypass valve, which is usually installed between the water separator and the water collector, or can be configured in the heat exchanger unit. Purpose: When the load becomes smaller, the return water pressure will become lower, and the circulating pump will be in a low-flow working state. Frequent changes in load will cause continuous changes in the working state of the pump and affect the pump life. At this time, the pressure difference in parallel with the load The bypass valve is opened to ensure the water circulation of the system; on the other hand, if the water supply is not controlled, the return water pressure difference is added, and the water is returned from the near-end user first. When the near-end user is working with heavy load, the near-end support will not get enough The flow of
When the differential pressure bypass valve is configured, most users still choose the frequency conversion recirculation valve to increase the stability of the system. The differential pressure value can be set on the on-site controller or remotely.
(5) Power-off protection function
After a sudden power failure, the electric valve on the primary side will automatically shut off the heat source (such as steam) to prevent over-temperature on the secondary side or even vaporization from destroying the heat exchanger and pipelines. The controller and inverter will automatically reset and set various settings. Parameters and
Keep operating parameters set before power off
(6) Power-on self-check function
The secondary return water pressure has a set over-bottom line protection paper. When the secondary side pressure does not reach this value, the circulating pump cannot be started but only the make-up pump can be turned on for water replenishment. After reaching the set value, the circulating pump can be started to exchange heat.
After the unit is powered on, the self-check sequence starts each unit
(7) Loss of pressure protection
When the secondary side return water pressure is lower than the set value, the circulating pump will automatically stop running
(8) Over-temperature protection
When the primary heat source temperature exceeds 180 degrees, the electric valve is automatically closed and an alarm signal is provided. …
(9) Overpressure protection
After the secondary water supply pressure exceeds the set value, in addition to the automatic pressure relief, the primary side electric valve is also closed. …
(10) Monitor the level of the water tank
When the liquid level of the water tank is lower than the ultra-low line, the make-up pump stops and provides an alarm signal. …
(11) Time control procedure
The machine can be switched on and off regularly, in an energy-saving mode, and the heating can be set at different times of day, week and month.
