[0019] Example 1: An integrated multiple waste heat coupled heating system, including a float glass waste heat recovery device, a solar waste heat recovery device and a lithium bromide heat pump heating device.
[0020] The float glass waste heat recovery device includes a float glass workshop (1), a hot pool (22), a cold pool (21), a second circulating pump (17), a third circulating pump (18), a two-stage control valve, The cooling tower (6), the heat pump, the first water outlet of the float glass workshop (1) is connected to the heat pool (22) through the first water pipe, the inlet of the cooling tower (6) is connected to the upper water pipe, and the outlet of the cooling tower (6) The pipeline leads to the cold pool (21), the upper water pipe is equipped with a two-stage control valve and a circulation pump, the upper water pipe leads to the hot pool (22), and the circulation pump is arranged between the hot pool (22) of the upper water pipe and the two-stage control valve At the position of the two-stage control valve, the valves of the two-stage control valve are connected by the upper water pipe, and the upper water pipe located in this part is connected with the branch water pipe, and the branch water pipe is connected to the heat pump by the pipeline, and the pipeline located in this part is installed with a seventh Control valve (11).
[0021] The heat pump includes three groups, namely heat pump 23, heat pump 24 and heat pump 25. The hot end input of the evaporator of each heat pump (23, 24, 25) is a branch water pipe, and the cold end output of the evaporator of the heat pump is connected to the cooling tower (6). A twelfth control valve (16) is provided in the communication pipeline between the output of the cold end of the evaporator of the heat pump and the cooling tower (6). The hot end output of the condensers of the heat pumps (23, 24, 25) is a water collector (26), and a fourth circulation pump (27) is installed on the front-end pipeline of the water collector (26). The fourth circulation pump The front end of (27) is connected to the circulating water inlet of the water storage tank (39) of the solar waste heat recovery device, and the cold end input of the condenser of the heat pump (23, 24, 25) is the first water separator (28), the first water separator (28), the first water separator (28). A water separator (28) is connected to the outlet of the low temperature heat exchange section of the lithium bromide heat pump heating device.
[0022] The inlet of the cooling tower (6) is connected in parallel with at least two water pipes, and a group of control valve groups is installed on each water pipe. The valves of the stage control valve are connected by the upper water pipe, and the upper water pipe located in this part is connected with the branch water pipe. valve (11). Specifically, the water supply pipe includes a first water pipe and a second water pipe connected in parallel, the first water pipe is installed with a first group of control valves, and the first group of control valves includes a first two-stage control valve and a second control valve in parallel. Two-way two-stage control valve, the first two-stage control valve includes an eighth control valve (12) and a third control valve (7), and the second two-stage control valve includes a ninth control valve (13) and a fourth control valve Valve (8); a second group of control valve groups is installed in the water pipe of the second road, the second group of control valve groups includes the first two-stage control valve and the second two-stage control valve in parallel, and the first two-stage control valve includes A tenth control valve (14) and a fifth control valve (9), the second two-stage control valve includes an eleventh control valve (15) and a sixth control valve (10); the heat pump includes a first heat pump (23) ), a second heat pump (24) and a third heat pump (25).
[0023] The float glass waste heat recovery device further comprises a preliminary water tank (2), the water outlet pipe of the preliminary water tank (2) leads into the cold pool (21), and the second water outlet of the float glass workshop (1) is connected with the second water pipe, The second water outlet pipe is communicated with the water outlet pipe of the preparatory water tank (2). The water outlet pipes on both sides of the second water pipe are provided with a first control valve (3) on one side and a second control valve (4) on the other side. A first circulating pump (5) is installed on the water outlet pipe downstream of the second control valve (4). The hot pool (22) and the cold pool (21) are separated by an insulating layer (20), and an overflow port (19) connecting the two pools is arranged on the insulating layer (20).
[0024]The implementation method of the above device is as follows: a method for recovering the waste heat of float glass, the circulating water of 37-39° C. generated in the float glass workshop (1) is passed into the hot pool (22) through the first water pipe, and the second circulating pump ( 17), the third circulating pump (18) pressurizes, after the pressurization is completed, open the eighth control valve (12), the ninth control valve (13), the tenth control valve (14), the eleventh control valve (15) , close the third control valve (7), the fourth control valve (8), the fifth control valve (9), the sixth control valve (10), and open the seventh control valve (11), in the heat pool (22) The circulating water at 37-39°C is extracted by the circulating pump of the upper water pipe, and is extracted to the evaporators in the first heat pump (23), the second heat pump (24), and the third heat pump (25), as the heat of the evaporator end input, the circulating water at 37~39℃ exchanges heat with the intermediate water at 24~26℃ at the cold end of the condenser, after heat exchange, the hot end of the condenser outputs intermediate water at 33~35℃, and the cold end of the evaporator The circulating water at 31-33°C is output and supplied to the cooling tower (6), cooled by the cooling tower (6) and then discharged into the cold pool (21), and the circulating water in the cold pool (21) is pumped by the first circulating pump (5). ) pressurized, open the second control valve (4), the circulating water in the cold pool (21) is transported to the float glass workshop (1) as cooling water for float glass production, when no heat exchange is required, open the eighth control valve valve (12), ninth control valve (13), tenth control valve (14), eleventh control valve (15), third control valve (7), fourth control valve (8), fifth control valve (9), the sixth control valve (10), and the seventh control valve (11) is closed, the circulating water of 37-39°C in the hot pool (22) is extracted by the circulating pump of the upper water pipe, and is directly extracted to the cooling The tower (6) is cooled. The cold end of the evaporator outputs circulating water at a temperature of about 31-33°C and supplies it to the cooling tower (6). In a relatively stable temperature environment of ~30°C, if the temperature of the circulating water output from the cold end of the evaporator is higher than 30°C, it will be cooled by the cooling tower (6) and then discharged into the cold pool (21). When the temperature is lower than 30°C, it is directly discharged into the cold pool (21) through the cooling tower (6).
[0025] The intermediate water at 33-35° C. output from the hot ends of the condensers of the first heat pump (23), the second heat pump (24), and the third heat pump (25) is collected by the water collector (26). A fourth circulating pump (27) for extracting intermediate water in the water collector (26) is installed on the pipeline at the front end of the water collector, and the front end of the fourth circulating pump is connected to a water storage tank (39) of the solar waste heat recovery device . The intermediate water at 24-26°C input from the cold ends of the condensers of the first heat pump (23), the second heat pump (24) and the third heat pump (25) is supplied by the first water separator (28). The water device (28) is connected to the outlet of the low temperature heat exchange section of the lithium bromide heat pump heating device, and the hot water exchanged in the low temperature heat exchange section is used as the intermediate water at 24-26°C, so as to form the intermediate water of the float glass waste heat recovery and the waste heat of the solar energy. The recovery device reheats, and in the lithium bromide heat pump heating device, the part of the heat is exchanged with the high-temperature hot water of the power plant to the user pipeline, and the residual heat of float glass and solar energy is used as the heating heat source, and the heat exchanged has a relatively high temperature. The intermediate water with stable low temperature is used for the output of the cold end of the condenser end of the heat pump unit, and the circulation participates in the heat exchange, which saves both the amount of water and the heat.
[0026] In a power-off state, the second control valve (4) is closed, the first control valve (3) is opened, and the water in the reserve water tank (2) can provide cooling water for the float glass workshop (1) for 15 minutes. The hot pool (22) and the cold pool (21) are separated by an insulating layer (20), and an overflow (19) connecting the two pools is provided on the insulating layer (20), and the hot pool (22) Or the water in the cold pool (21) is too much and exceeds the overflow port (19) and enters the corresponding pool, so that the water does not overflow directly from the pool due to excessive storage of water in the separate pool.
[0027] The solar waste heat recovery device includes a solar water heater (34), a phase-change heat storage device (31), a water storage tank (39), a temperature sensor (29), a fifth circulation pump (30), and a thirteenth control valve ( 32), the fourteenth control valve (33), the fifteenth control valve (35), the circulation outlet of the water storage tank (39) and the solar water heater (34) are connected by a pipeline, and a tenth Five control valves (35), the water outlet pipe of the solar water heater (34) is branched into two parallel water pipes, a thirteenth control valve (32) is arranged on one water pipe and is connected to the fifth circulating pump (30), and the other water pipe A fourteenth control valve (33) is arranged on the upper part, and is connected to the phase-change heat storage device (31), and the phase-change heat storage device (31) is connected to the fifth circulation pump (30), and the fifth circulation pump (30) The outlet is connected to the circulation inlet of the water storage tank (39). The inlet of the water storage tank (39) is connected with the water collector (26), and the water collector (26) is the water collector (26) of the float glass waste heat recovery device, and the water collector (26) is connected to the water collector (26). The high temperature output ends of the condensers of the three groups of heat pumps of the float glass waste heat recovery device are connected.
