CN214332830U - Multi-path adjustable energy-saving device - Google Patents

Abstract

The utility model discloses an adjustable nodal pattern economizer of multichannel, main technical characterized in that: two governing valves that multichannel adjustable energy-saving device outside set up regulate and control two governing valves through controlling means and realize multichannel adjustable energy-saving device's energy-conserving operation, and beneficial effect is: the energy-saving performance is good, the reliability is high, each group of headers works independently without mutual influence, and the headers are easy to disassemble and replace; even if the single group of headers is out of service due to faults, the continuous work of other groups of headers and the whole thermodynamic system cannot be influenced, the doping of cold and hot fluids cannot occur, the running safety of the boiler cannot be endangered, and the running reliability of equipment is greatly improved; the adjusting application range is wide, the temperature and the flow of the inlet of each cold source working medium can be changed in a large range, the load of the boiler and the temperature of exhaust gas can be changed in a large range, and in addition, the temperature of the outlet of the cold source working medium and the temperature of the exhaust gas can be adjusted according to actual requirements.

Description

Multi-path adjustable energy-saving device

Technical Field

The utility model relates to a boiler feedwater and heat supply technical field, especially an adjustable nodal pattern economizer of multichannel.

Background

The energy demand rigidity of China is increased, the resource and environment problems are still one of the bottlenecks restricting the development of the economic society of China, and the energy conservation and emission reduction are still serious and have difficult tasks. From various heat losses of the boiler, the heat loss of the exhaust smoke is the largest one, generally 5-8% of the boiler efficiency, and with the increase of the operating life of the boiler, the loss is even higher and can reach about 10-15%. Therefore, the flue gas waste heat recovery technology is the energy-saving technology with the most obvious energy-saving benefit and the fastest effect. It recycles part of energy in the exhaust loss to improve boiler efficiency, and then improves energy utilization, reduces manufacturing cost, also is the most direct, economic means of reducing pollutant discharge, environmental protection simultaneously.

In the existing boiler water supply and heat supply system, heat required by heat supply is obtained by burning boiler fuel to heat boiler water, steam is generated, and the steam is used for reheating heating water to obtain heat. The system has more heat transfer processes, the balance effectiveness is reduced, the temperature difference between one side of a combustion product and the other side of the combustion product is larger, huge heat energy loss is caused in the heat transfer process, generally, the balance is not considered in the irreversible loss of the process, the irreversible loss of the combustion process and the irreversible loss of the heat exchange process account for a large proportion, the heat conduction efficiency is quite low, the system does not comply with the energy cascade utilization principle, and the operation cost is higher.

In the existing flue gas-water heat exchanger, a snake-shaped spiral finned tube group connected with an inlet header and an outlet header is an integral heat exchanger, and if a certain point of a tube bundle is corroded and leaked, the whole heat exchanger needs to stop working immediately; meanwhile, if the whole system is not isolated in time, a large amount of steam and water can leak into the flue gas system, so that subsequent equipment is accumulated with dust and corroded, the load of a fan is increased, the power consumption is increased, and the boiler can not run in serious cases;

secondly, the existing flue gas-water heat exchangers only heat boiler feed water, when the boiler is operated at full load, the residual heat of flue gas and the temperature of the flue gas before entering the flue gas-water heat exchangers are fixed, and the water feed flow and the water inlet temperature of the boiler are fixed, so the exhaust gas temperature and the water outlet temperature are also fixed under the working condition, the exhaust gas temperature and the water outlet temperature cannot be adjusted, and the residual heat of the flue gas is not fully utilized.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome not enough among the above-mentioned technical problem, provide an adjustable nodal pattern economizer of multichannel to furthest's utilization flue gas waste heat.

In order to overcome the technical problem, the utility model discloses a technical scheme is:

a multi-path adjustable energy-saving device comprises a gas boiler, a multi-path adjustable energy-saving device, a chimney, a heating circulating pump, a hot water tank, a cold water tank, a steam-water heat exchanger, a heating water supply area, a stop valve, an adjusting valve, a control device and a water tank circulating pump, and is characterized in that a spiral fin pipe group is arranged in the multi-path adjustable energy-saving device, and a first adjusting valve and a second adjusting valve are arranged outside the multi-path adjustable energy-saving device;

the arrangement quantity of the spiral finned tube groups in the multi-path adjustable energy-saving device is at least two, spiral finned tubes of each spiral finned tube group are connected in series through connecting bent tubes, two ends of each spiral finned tube group are respectively connected with a hot water tank and a cold water tank, and each spiral finned tube group is connected with the hot water tank and the cold water tank in series independently or in cross connection with the hot water tank and the cold water tank;

the first end of the multi-path adjustable energy-saving device is connected with a hot water tank through a pipeline with a first stop valve, the first end of the multi-path adjustable energy-saving device is connected with a water tank circulating pump through a pipeline with a second stop valve, the water tank circulating pump is connected with a cold water tank, the pipeline with the first stop valve and the pipeline with the second stop valve are connected through a pipeline with a first adjusting valve and are arranged at the lower end parts of the first stop valve and the second stop valve, the hot water tank and the cold water tank are connected through a pipeline with a third stop valve, the other end of the hot water tank is connected with one end of a gas boiler through a pipeline, the other end of the gas boiler is connected with the second end of the multi-path adjustable energy-saving device, the third end of the multi-path adjustable energy-saving device is connected with a chimney, the fourth end of the multi-path adjustable energy-saving device is connected with a heating water supply area through a pipeline with a fourth stop valve, and is connected with a heating circulating pump through a pipeline with a fifth stop valve, the pipeline with the fifth stop valve is connected with the pipeline with the fourth stop valve through a pipeline with a second regulating valve, and is arranged at the upper end parts of the fourth stop valve and the fifth stop valve, wherein a sixth stop valve is also arranged at the front end part of the heating circulating pump in the pipeline connected with the heating circulating pump, the pipelines at the upper end part and the lower end part of the sixth stop valve at the front end part of the heating circulating pump are respectively connected with the steam-water heat exchanger through the pipeline with the seventh stop valve and the pipeline with the eighth regulating valve stop valve, and the control device is respectively connected with the second regulating valve and the first regulating valve.

Compared with the prior art, the beneficial effects of the utility model are that: the energy-saving performance is good, the reliability is high, each group of headers works independently without mutual influence, and the headers are easy to disassemble and replace; even if the single group of headers is out of service due to faults, the continuous work of other groups of headers and the whole thermodynamic system cannot be influenced, the doping of cold and hot fluids cannot occur, the running safety of the boiler cannot be endangered, and the running reliability of equipment is greatly improved;

the adjusting application range is wide, the temperature and the flow of the inlet of each cold source working medium can be changed in a large range, the load of the boiler and the temperature of exhaust gas can be changed in a large range, and in addition, the temperature of the outlet of the cold source working medium and the temperature of the exhaust gas can be adjusted according to actual requirements.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic diagram of the principle structure of the present invention.

Fig. 2 is a front view of the inside of the spiral fin tube group of the present invention connected in series individually.

Fig. 3 is a top view of fig. 2.

Fig. 4 is a view of fig. 2 showing a.

Fig. 5 is a front view of the inside of the spiral fin tube group of the present invention in cross-series connection.

Fig. 6 is a top view of fig. 5.

Fig. 7 is a view of fig. 5 showing B.

Fig. 8 is a view in the direction of C shown in fig. 5.

Fig. 9 is an external schematic view of the cross-connection of the spiral fin tube groups of the present invention.

FIG. 10 is an external view of the spiral fin tube groups of the present invention connected in series individually

Fig. 11 is a schematic diagram of the control device of the present invention.

Fig. 12 is a schematic view of the structure of the present invention.

Fig. 13 is a schematic view of another embodiment of the present invention.

Detailed Description

As can be seen from fig. 1 to 13, the system comprises a gas boiler 1, a multi-path adjustable energy-saving device 2, a chimney 3, a heating circulating pump 4, a hot water tank 5, a cold water tank 6, a steam-water heat exchanger 7, a heating water supply area 8, a stop valve, a regulating valve, a control device 11, a water tank circulating pump 12, an arrangement spiral fin tube group 13 inside the multi-path adjustable energy-saving device 2, and two regulating valves arranged outside the multi-path adjustable energy-saving device 2, namely a first regulating valve 10a and a second regulating valve 10 b;

the arrangement quantity of the spiral fin tube groups 13 in the multi-path adjustable energy-saving device 2 is at least two, spiral fins of each spiral fin tube group 13 are connected in series through connecting bent tubes, two ends of each spiral fin tube group 13 are respectively connected with the hot water tank 5 and the cold water tank 6, and each spiral fin tube group 13 is connected with the hot water tank 5 and the cold water tank 6 in series independently or connected with the hot water tank 5 and the cold water tank 6 in series in a crossing manner;

the first end of the multi-path adjustable energy-saving device 2 is connected with a hot water tank 5 through a pipeline with a first stop valve 9a, the first end of the multi-path adjustable energy-saving device is connected with a water tank circulating pump 12 through a pipeline with a second stop valve 9b, the water tank circulating pump 12 is connected with a cold water tank 6, the pipeline with the first stop valve 9a and the pipeline with the second stop valve 9b are connected through a pipeline with a first adjusting valve 10a and are arranged at the lower end parts of the first stop valves 9a and 9b, the hot water tank 5 and the cold water tank 6 are connected through a pipeline with a third stop valve 9c, the other end of the hot water tank 5 is connected with one end of a gas boiler 1 through a pipeline, the other end of the gas boiler 1 is connected with the second end of the multi-path adjustable energy-saving device 2, the third end of the multi-path adjustable energy-saving device 2 is connected with a chimney 3, the fourth end of the multi-path adjustable energy-saving device 2 is connected with a heating water supply area 8, The heating circulation pump 4 is connected through a pipeline with a fifth stop valve 9e, the pipeline with the fifth stop valve 9e and the pipeline with a fourth stop valve 9d are connected through a pipeline with a first regulating valve 10b and are installed at the upper end parts of the fourth stop valves 9d and 9e, wherein a sixth stop valve 9f is further arranged at the front end part of the heating circulation pump 4 in the pipeline connected with the heating circulation pump 4, the pipelines at the upper end part and the lower end part of the sixth stop valve 9f at the front end part of the heating circulation pump 4 are respectively connected with the steam-water heat exchanger 7 through a pipeline with a regulating valve seventh stop valve 9g and a pipeline with a regulating valve eighth stop valve 9h, and the control device 11 is respectively connected with the first regulating valve 10b and the second regulating valve 10 a.

The two ends of the spiral fin tube groups 13 are provided with multi-path water supply and return headers, the number of the multi-path water supply and return headers is at least three, when each group of spiral fin tube groups 13 is crossed and connected with the hot water tank 5 and the cold water tank 6 in series, the multi-path water supply and return headers are connected with the spiral fin tubes of each group of spiral fin tube groups 13, wherein, a first multi-path water supply and return header 14a is respectively provided with a second medium water outlet pipeline 16a with a ninth stop valve 9h and a second medium water inlet pipeline 16b with a tenth stop valve 9j, one end of the pipeline with a third regulating valve 10c is connected with the lower end of the ninth stop valve 9h of the second medium water outlet pipeline 16a, the other end of the pipeline with the third regulating valve 10c is connected with the lower end of the tenth stop valve 9j of the second medium water inlet pipeline 16b, the upper end of the tenth stop valve 9j is connected with a first medium water outlet pipeline 17a through a pipeline with an eleventh stop valve 9k, a ninth stop valve 9h is arranged on the first medium water outlet pipeline 17a, the first medium water outlet pipeline 17a is connected with a second multi-path water supply and return header 14b, the lower end of a tenth stop valve 9j is connected with the second multi-path water supply and return header 14b through a pipeline with a twelfth stop valve 9m, the upper end of the twelfth stop valve 9m is connected with a third multi-path water supply and return header 14c through a pipeline with a thirteenth stop valve 9n, a first medium water inlet pipeline 17b with a fourteenth stop valve 9o is connected with the third multi-path water supply and return header-14 c, one end of a pipeline with a fourth regulating valve 10d is connected with the lower end of the fourteenth stop valve 9o, and the other end of the pipeline with the fourth regulating valve 10d is connected with the lower end of the ninth stop valve 9 h;

when each group of spiral fin tube groups 13 are connected with the hot water tank 5 and the cold water tank 6 in series independently, a plurality of paths of water supply and return headers are arranged at two ends of each spiral fin tube group 13, one end of each path of water supply and return header is provided with a second medium water outlet pipeline 16a with a fifteenth stop valve 9o and a second medium water inlet pipeline 16b with a sixteenth stop valve 9q, one end of a pipeline with a fifth regulating valve 10e is connected to the front end of the sixteenth stop valve 9q of the second medium water outlet pipeline 16a, and the other end of the pipeline with the fifth regulating valve 10e is connected to the front end of the sixteenth stop valve 9q of the second medium water inlet pipeline 16 b; the other end of the multi-path water supply and return header is provided with a first medium water outlet pipeline 17a with a seventeenth stop valve 9r and a first medium water inlet pipeline 17b with an eighteenth stop valve 9s, one end of a pipeline with a sixth regulating valve 10f is connected to the front end of the seventeenth stop valve 9r of the first medium water outlet pipeline 17a, and the other end of the pipeline with the sixth regulating valve 10f is connected to the front end of the eighteenth stop valve 9s of the first medium water inlet pipeline 17 b.

The first regulating valve 10a is provided with a smoke exhaust temperature control measuring point 20, and the first regulating valve 10a is provided with a medium water temperature measuring point 21.

One end of a PLC 15 of the control device 11 is respectively connected with a medium water temperature measuring point 21, a smoke exhaust temperature measuring point 20, a second regulating valve 10b and a first regulating valve 10a, and the other end of the PLC 15 of the control device 11 is respectively connected with a mobile end 18 and a PC end 19 through communication buses.

The utility model discloses heat heating water and boiler feed water simultaneously, when economizer normal operating, first stop valve 9a, second stop valve 9b, fifth stop valve 9e, fourth stop valve 9d, sixth stop valve 9f is opened, seventh stop valve 9g, eighth stop valve 9h, third stop valve 9c is closed, according to outdoor temperature variation, adjust the heating discharge who gets into economizer through second governing valve 10b, thereby adjust heat supply temperature, in order to satisfy the heat supply demand, after satisfying the heat supply demand, adjust the flow that boiler feed water got into economizer through first governing valve 10a, thereby adjust exhaust gas temperature.

When the boiler water supply side of the energy-saving device is normal and the heating side is in fault, the first stop valve 9a, the second stop valve 9b, the seventh stop valve 9g and the eighth stop valve 9h are opened, the fifth stop valve 9e, the fourth stop valve 9d and the sixth stop valve 9f are closed, and a heat supply heat source is switched to the steam-water heat exchanger by the energy-saving device. When the heating side of the energy-saving device is normal and the boiler water supply side is in fault, the fourth stop valve 9d, the fifth stop valve 9e, the sixth stop valve 9f and the third stop valve 9c are opened, the first stop valve 9a, the second stop valve 9b, the seventh stop valve 9g and the eighth stop valve 9h are closed, the water tank circulating pump is stopped, the inlet and outlet valves are closed, at the moment, the cold water tank and the hot water tank are communicated, and boiler water supply is equivalent to the fact that the cold water tank is used for supplying water to the boiler directly after being extracted.

The aforesaid is realized through novel adjustable nodal pattern economizer of multichannel, the utility model discloses one of them inner structure is as shown in figure 2, 3, 4, this economizer heatable multiple medium, and inside sets up multiunit confession return water header and a plurality of group helical fin nest of tubes, and the helical fin of every group helical fin nest of tubes passes through connecting bend series connection, and all helical fin nest of tubes both ends are equallyd divide and do not supply the return water header with this group to be connected, and all helical fin nest of tubes that every group confession return water header is connected establish ties alone each other, the utility model discloses flue gas direction is not limited to the flue gas direction parallel with helical fin nest of tubes series direction, and flue gas direction can also be perpendicular with helical fin nest of tubes series direction.

When the spiral fin tube groups connected with the multi-path water supply and return headers are connected in series, each group of water supply and return headers can be switched to use through a process system, as shown in fig. 9, under a certain working condition, the first multi-path water supply and return header 14a heats the medium 2, the second multi-path water supply and return header 14b and the third multi-path water supply and return header 14c heat the medium 1, at the time, the ninth stop valve 9i, the tenth stop valve 9j, the nineteenth stop valve 9l, the thirteenth stop valve 9n, the fourteenth stop valve 9o are opened, the eleventh stop valve 9k and the twelfth stop valve 9m are closed, when the medium 1 does not work, in order to utilize the waste heat of the flue gas to the maximum extent, the first multi-path water supply and return header 14a and the second multi-path water supply and return header 14b heat the medium 2, the ninth stop valve 9i, the eleventh stop valve 9k, the twelfth stop valve 9m are opened, the fourteenth stop valve 9o, the thirteenth stop valve 9n, the twelfth stop valve 9m are opened, The nineteenth and tenth stop valves 9l and 9j are closed, and the third and fourth regulating valves 10c and 10d can regulate the medium temperature and the exhaust gas temperature as required. The utility model discloses be not limited to this kind of switching mode, can also carry out different configurations as required and switch.

The utility model discloses an another inner structure is as shown in fig. 5, 6, 7, 8, and this economizer is multiple medium of the same heatable, and inside sets up multiunit and supplies return water header and a plurality of group helical fin nest of tubes, and the helical fin of every group helical fin nest of tubes passes through the connecting bend series connection, and all helical fin nest of tubes both ends are equallyd divide and are do not supplied the return water header with this group to be connected, and all helical fin nest of tubes that every group supplied the return water header to connect alternately establish ties between each other, the utility model discloses be not limited to flue gas direction and helical fin nest of tubes series direction are parallel, and flue gas direction can also be perpendicular with helical fin nest of tubes series direction.

When the novel multi-path adjustable energy-saving device is in normal operation, as shown in fig. 10, the fifteenth stop valve 9p, the sixteenth stop valve 9q, the seventeenth stop valve 9r and the eighteenth stop valve 9s are opened, and 2 medium flows entering the energy-saving device are adjusted through the fifth adjusting valve 10e, so that 2 medium temperatures are adjusted, temperature requirements are met, after the temperature requirements are met, the flow of the medium 1 entering the energy-saving device is adjusted through the sixth adjusting valve 10f, and the smoke exhaust temperature is adjusted. The system can set the required medium 2 temperature and the exhaust gas temperature at the PC end and the mobile end, realizes automatic adjustment through PLC, and has a control logic schematic diagram as shown in figure 11.

This device mountable is in the position between boiler smoke exhaust flue and chimney, as shown in fig. 12, for making equipment heat preservation effect better, the appearance is more pleasing to the eye, can adopt the various steel sheet 22 of heat preservation to seal this device, and the appearance is as shown in fig. 13, the utility model discloses be not limited to this kind of architectural appearance, can also adjust different architectural appearances as required.

The present invention is not limited to the precise arrangements described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims (6)

1. A multi-path adjustable energy-saving device comprises a gas boiler (1), a multi-path adjustable energy-saving device (2), a chimney (3), a heating circulating pump (4), a hot water tank (5), a cold water tank (6), a steam-water heat exchanger (7), a heating water supply area (8), a stop valve, a regulating valve, a control device (11) and a water tank circulating pump (12), and is characterized in that a spiral fin pipe group (13) is arranged inside the multi-path adjustable energy-saving device (2), and a first regulating valve (10a) and a second regulating valve (10b) are arranged outside the multi-path adjustable energy-saving device (2);

the arrangement quantity of the spiral fin tube groups (13) in the multi-path adjustable energy-saving device (2) is at least two, spiral fins of each spiral fin tube group (13) are connected in series through connecting bent tubes, two ends of each spiral fin tube group (13) are respectively connected with the hot water tank (5) and the cold water tank (6), and each spiral fin tube group (13) is connected with the hot water tank (5) and the cold water tank (6) in series independently or in cross connection with the hot water tank (5) and the cold water tank (6);

the first end of the multi-path adjustable energy-saving device (2) is connected with a hot water tank (5) through a pipeline with a first stop valve (9 a), the first end of the multi-path adjustable energy-saving device is connected with a water tank circulating pump (12) through a pipeline with a second stop valve (9 b), the water tank circulating pump (12) is connected with a cold water tank (6), the pipeline with the first stop valve (9 a) and the pipeline with the second stop valve (9 b) are connected through a pipeline with a first adjusting valve (10a) and are arranged at the lower end parts of the first stop valve (9 a) and the second stop valve (9 b), the hot water tank (5) and the cold water tank (6) are connected through a pipeline with a third stop valve (9 c), the other end of the hot water tank (5) is connected with one end of the gas boiler (1) through a pipeline, the other end of the gas boiler (1) is connected with the second end of the multi-path adjustable energy-saving device (2), the third end of the multi-path adjustable energy-saving device (2) is connected with a chimney (3), the fourth end of the multi-path adjustable energy-saving device (2) is connected with a heating water supply area (8) through a pipeline with a fourth stop valve (9 d), and is connected with a heating circulating pump (4) through a pipeline with a fifth stop valve (9 e), the pipeline with the fifth stop valve (9 e) is connected with the pipeline with the fourth stop valve (9 d) through a pipeline with a second regulating valve (10b), and is arranged at the upper end parts of the fourth stop valve (9 d) and the fifth stop valve (9 e), wherein, in the pipeline connected with the heating circulating pump (4), a sixth stop valve (9 f) is also arranged at the front end part of the heating circulating pump (4), in the pipelines at the upper end part and the lower end part of the sixth stop valve (9 f) at the front end part of the heating circulating pump (4), the water heater is connected with the steam-water heat exchanger (7) through a pipeline with a seventh stop valve (9 g) and a pipeline with an eighth regulating valve stop valve (9 h), and the control device (11) is connected with a second regulating valve (10b) and a first regulating valve (10a) respectively.

2. A multiplex adjustable energy saver device according to claim 1 wherein: the two ends of each spiral fin tube group (13) are provided with a plurality of multi-way water supply and return headers, the number of the multi-way water supply and return headers is at least three, when each group of spiral fin tube groups (13) is in cross connection with the hot water tank (5) and the cold water tank (6) in series, the multi-way water supply and return headers are connected with spiral fin tubes of each group of spiral fin tube groups (13), wherein, a first multi-way water supply and return header (14 a) is respectively provided with a second medium water outlet pipeline (16 a) with a ninth stop valve (9 i) and a second medium water inlet pipeline (16 b) with a tenth stop valve (9 j), one end of the pipeline with a third regulating valve (10 c) is connected with the lower end of the ninth stop valve (9 i) of the second medium water outlet pipeline (16 a), and the other end of the pipeline with the third regulating valve (10 c) is connected with the lower end of the tenth stop valve (9 j) of the second medium water inlet pipeline (16 b), the upper end of a tenth stop valve (9 j) is connected with a first medium water outlet pipeline (17 a) through a pipeline with an eleventh stop valve (9 k), a ninth stop valve (9 i) is arranged on the first medium water outlet pipeline (17 a), the first medium water outlet pipeline (17 a) is connected with a second multi-path water supply and return header (14 b), the lower end of the tenth stop valve (9 j) is connected with a second multi-path water supply and return header (14 b) through a pipeline with a twelfth stop valve (9 m), the upper end of the twelfth stop valve (9 m) is connected with a third multi-path water supply and return header (14 c) through a pipeline with a thirteenth stop valve (9 n), a first medium water inlet pipeline (17 b) with a fourteenth stop valve (9 o) is connected with a third multi-path water supply and return header (14-c), one end of a pipeline with a fourth regulating valve (10 d) is connected with the lower end of the fourteenth stop valve (9 o), the other end of the pipeline with the fourth regulating valve (10 d) is connected to the lower end of a ninth stop valve (9 i).

3. A multiplex adjustable energy saver device according to claim 1 wherein: when each group of spiral fin tube groups (13) are connected with the hot water tank (5) and the cold water tank (6) in series independently, two ends of each spiral fin tube group (13) are provided with a plurality of paths of water supply and return headers, one end of each path of water supply and return header is provided with a second medium water outlet pipeline (16 a) with a fifteenth stop valve (9 p) and a second medium water inlet pipeline (16 b) with a sixteenth stop valve (9 q), one end of a pipeline with a fifth regulating valve (10 e) is connected to the front end of the sixteenth stop valve (9 q) of the second medium water outlet pipeline (16 a), and the other end of the pipeline with the fifth regulating valve (10 e) is connected to the front end of the sixteenth stop valve (9 q) of the second medium water inlet pipeline (16 b); the other end of the multi-path water supply and return header is provided with a first medium water outlet pipeline (17 a) with a seventeenth stop valve (9 r) and a first medium water inlet pipeline (17 b) with an eighteenth stop valve (9 s), one end of a pipeline with a sixth regulating valve (10 f) is connected to the front end of the seventeenth stop valve (9 r) of the first medium water outlet pipeline (17 a), and the other end of the pipeline with the sixth regulating valve (10 f) is connected to the front end of the eighteenth stop valve (9 s) of the first medium water inlet pipeline (17 b).

4. A multiplex adjustable energy saver device according to claim 1 wherein: the first regulating valve (10a) is provided with a smoke discharging temperature control measuring point (20).

5. A multiplex adjustable energy saver device according to claim 1 wherein: a medium water temperature measuring point (21) is arranged on the first regulating valve (10 a).

6. A multiplex adjustable energy saver device according to claim 1 wherein: one end of a PLC (15) of the control device (11) is respectively connected with a medium water temperature measuring point (21), a smoke exhaust temperature control measuring point (20), a second regulating valve (10b) and a first regulating valve (10a), and the other end of the PLC (15) of the control device (11) is respectively connected with a moving end (18) and a PC end (19) through a communication bus.

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