CN220229084U - Industrial steam production system - Google Patents

Abstract

The utility model discloses an industrial steam production system, which comprises: the heat supply unit comprises a high-temperature heat source supplier and a low-temperature heat source supplier. In the utility model, industrial steam with various parameters is independently prepared, the heat load is not affected when changing, and the adjustment is easy; through reasonable grading of the superheated steam, transfer of the residual superheated steam is not needed, and a system is simplified; the drainage heat of the main steam of the high-temperature reactor is firstly utilized through the evaporator, then the drainage cooler is used for heating desalted water, the gradient utilization of energy is further carried out, and the system is reasonable.

Description

Industrial steam production system

Technical Field

The utility model relates to the technical field of industrial steam production, in particular to an industrial steam production system.

Background

With the increasing number of nuclear power units in China and the continuous development of nuclear energy application technology, nuclear energy multipurpose application, particularly nuclear energy heating technology is mature, a plurality of nuclear power units at home and abroad adopt a cogeneration mode to supply heat to regional residents, however, no application example of a nuclear power station for externally supplying large-scale industrial steam exists in China at present.

Chinese patent discloses a nuclear power station industrial steam conversion system (publication No. CN 215372386U) and an industrial steam production system for pressurized water reactor nuclear motor unit (publication No. CN111834026 a), both of which propose a system concept for supplying industrial steam to nuclear power, but the shortcomings are:

(1) Both patents are limited to pressurized water reactor steam parameters (6.3 MPa (a), 278.8 ℃), and only provide industrial steam of one low temperature pressure parameter, which cannot provide industrial steam of a higher parameter. Although patent CN215372386U mentions: for the industrial steam requirement of higher temperature pressure (such as 5.0MPa and 460 ℃ in temperature), the super heater of the primary heating steam from the main steam of the high-temperature gas cooled reactor with higher pressure and temperature can be added on the basis of the industrial steam conversion system. But not more specific implementations. In fact, because the phenomenon that the high-parameter steam condensate temperature is reduced and the pinch point with the minimum heat exchange temperature difference appears in the process of evaporating and vaporizing the heated water by the high-parameter steam condensate exists, for preparing industrial steam with higher temperature and pressure, only the primary superheater is often insufficient, in addition, the introduction of the high-temperature gas cooled reactor main steam with higher pressure and temperature is equivalent to the new addition of one heat source, how the flows of the pressurized water reactor and the high-temperature gas cooled reactor main steam are distributed also needs to be comprehensively considered according to the factors of the complexity degree, the operation flexibility, the influence on a steam turbine, the size of full-field power generation and the like of the system, and the method is simple to add the primary superheater.

(2) For a steam conversion system (publication number CN 215372386U) for nuclear power plant industry, the main equipment is a plurality of heat exchange equipment such as a preheater, a deaerator, an evaporator, a superheater and the like, wherein in the traditional scheme, the preheater, the evaporator and the superheater are all shell-and-tube heat exchangers, the preheater is a U-shaped tubular heater, and the deaerator is a hybrid heat exchanger. For an industrial steam production system for pressurized water reactor nuclear power units (publication number CN111834026 a), no reference is made to the heat exchanger version.

U-tube heaters are a common form of high and low pressure heater for power plants, but the following problems have been difficult to solve throughout many years of application: 1) The temperature difference between the front side and the rear side of the tube plate is huge and uneven, taking 3# high addition of one-time reheating as an example, the temperature difference between the two sides of the tube plate in the upper superheating area is more than or equal to 310 ℃, the temperature difference between the two sides of the tube plate in the lower dewatering area is only 5.6 ℃, thus the temperature difference between the upper side and the lower side of the tube plate is more than or equal to 300 ℃, the unlimited secondary stress is huge, the yield limit is often exceeded, and the secondary reheating unit is even more; the temperature difference can lead to the connection failure of the pipe and the pipe plate, delamination and detachment of the overlaying layer and the pipe plate, cracking and leakage of welding seams of the pipe and the pipe plate, high disconnection, load reduction of a unit by at least 12 percent and the like. 2) The temperature difference between the inlet and the outlet of the water chamber is more than or equal to 25 ℃, the water chamber has secondary temperature difference stress for a long time during operation, and a thick water chamber with high stress and uneven temperature difference exists, so that the water chamber is cracked, a heater is separated, and a certain potential safety hazard exists. 3) The horizontal U-shaped tube-sheet heater needs a plurality of equipment, is arranged in multiple layers, occupies large space, has long steam-water pipelines and greatly increases factory investment.

Disclosure of Invention

The utility model aims to solve at least one technical problem in the background art and provides an industrial steam production system.

To achieve the above object, the present utility model provides an industrial steam production system comprising: the heat supply unit comprises a high-temperature heat source supplier and a low-temperature heat source supplier, a medium-pressure steam conversion unit, a secondary medium-pressure steam conversion unit and a low-pressure steam conversion unit which are connected with the heat supply unit, and a primary preheater which is respectively connected with the medium-pressure steam conversion unit, the secondary medium-pressure steam conversion unit and the low-pressure steam conversion unit.

According to one aspect of the utility model, the medium pressure steam conversion unit comprises a first high temperature superheater, a medium temperature superheater, a first low temperature superheater, a first evaporator, a second evaporator, a first deaerator, a first feedwater pump, and a first secondary preheater;

the first high-temperature superheater, the medium-temperature superheater and the first low-temperature superheater are connected end to end and then connected in series with the high-temperature heat source supplier and the second evaporator through pipelines;

one end of the first evaporator and one end of the second evaporator which are connected in parallel are connected with the port of the first low-temperature superheater;

the first deaerator, the first water supply pump and the first secondary preheater are connected in series and then connected with the other end of the first evaporator and the second evaporator after being connected in parallel.

According to one aspect of the utility model, the medium pressure steam conversion unit further comprises a medium pressure industrial steam pipe network connecting the ports of the first high temperature superheater and the first deaerator.

According to one aspect of the utility model, the low temperature heat source supply, the first evaporator, the first secondary preheater and the primary preheater are connected in series.

According to one aspect of the utility model, the secondary medium pressure steam conversion unit comprises a second high temperature superheater, a second low temperature superheater, a third evaporator, a second secondary preheater, a second feedwater pump and a second deaerator which are connected end to end.

According to one aspect of the utility model, the secondary medium pressure steam conversion unit further comprises a secondary medium pressure industrial steam pipe network connecting the ports of the second high temperature superheater and the second deaerator.

According to one aspect of the utility model, the high temperature heat source supply, the second high temperature superheater, the second low temperature superheater and the second evaporator are connected in series;

the low temperature heat source supplier, the third evaporator, the second secondary preheater and the primary preheater are connected in series.

According to one aspect of the utility model, the low pressure steam conversion unit comprises a third high temperature superheater, a third low temperature superheater, a fourth evaporator, a third secondary preheater, a third feedwater pump and a third deaerator connected end to end.

According to one aspect of the utility model, the low pressure steam conversion unit further comprises a low pressure industrial steam pipe network connecting the ports of the third high temperature superheater and the third deaerator.

According to one aspect of the utility model, the high temperature heat source supply, the third high temperature superheater, the third low temperature superheater and the second evaporator are connected in series;

the low temperature heat source supplier, the fourth evaporator, the third secondary preheater and the primary preheater are connected in series.

The technical scheme of the utility model has the following beneficial effects:

(1) The industrial steam with each parameter is independently prepared, the heat load is not mutually influenced when changing, and the adjustment is easy;

(2) Through reasonable grading of the superheated steam, transfer of the residual superheated steam is not needed, and a system is simplified;

(3) The drainage heat of the main steam of the high-temperature reactor is firstly utilized by an evaporator, then the drainage cooler is used for heating desalted water, the cascade utilization of energy is further carried out, and the system is reasonable;

(4) The high-temperature reactor steam turbine is flexible to operate, and the starting and the debugging are not limited by thermal load;

(5) The pressurized water reactor unit has larger power generation and can operate under higher load.

Drawings

Fig. 1 schematically shows a structural layout of an industrial steam production system according to an embodiment of the present utility model.

Reference numerals: 1. a heat supply unit; 2. a medium pressure steam converting unit; 3. a secondary medium pressure steam conversion unit; 4. a low pressure steam converting unit; 5. a primary preheater; 6. a high temperature heat source supplier; 7. a low temperature heat source supplier; 8. a first high temperature superheater; 9. a medium temperature superheater; 10. a first low temperature superheater; 11. a first evaporator; 12. a second evaporator; 13. a first deaerator; 14. a first feed water pump; 15. a first secondary preheater; 16. a medium pressure industrial steam pipe network; 17. a second high temperature superheater; 18. a second low temperature superheater; 19. a third evaporator; 20. a second stage preheater; 21. a second feed water pump; 22. a second deaerator; 23. a secondary medium pressure industrial steam pipe network; 24. a third high temperature superheater; 25. a third low temperature superheater; 26. a fourth evaporator; 27. a third secondary preheater; 28. a third feed water pump; 29. a third deaerator; 30. low pressure industrial steam pipe network.

Detailed Description

The present disclosure will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are merely to enable those of ordinary skill in the art to better understand and thus practice the teachings of the present utility model and do not imply any limitation on the scope of the utility model.

As used herein, the term "comprising" and variants thereof are to be interpreted as meaning "including but not limited to" open-ended terms. The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment.

Fig. 1 schematically shows a structural layout of an industrial steam production system according to an embodiment of the present utility model. As shown in fig. 1, in the present embodiment, an industrial steam production system includes: the heat supply unit 1 includes a medium pressure steam converting unit 2, a secondary medium pressure steam converting unit 3 and a low pressure steam converting unit 4 connected to the heat supply unit 1, and a primary preheater 5 connected to the medium pressure steam converting unit 2, the secondary medium pressure steam converting unit 3 and the low pressure steam converting unit 4, respectively, the heat supply unit 1 including a high temperature heat source supplier 6 and a low temperature heat source supplier 7.

As shown in fig. 1, in the present embodiment, the medium pressure steam converting unit 2 includes a first high temperature superheater 8, a medium temperature superheater 9, a first low temperature superheater 10, a first evaporator 11, a second evaporator 12, a first deaerator 13, a first feedwater pump 14, and a first secondary preheater 15;

the first high-temperature superheater 8, the medium-temperature superheater 9 and the first low-temperature superheater 10 are connected end to end and then connected in series with the high-temperature heat source supplier 6 and the second evaporator 12 through pipelines;

one end of the first evaporator 11 and the second evaporator 12 which are connected in parallel is connected with a port of the first low-temperature superheater 10;

the first deaerator 13, the first feed pump 14 and the first secondary preheater 15 are connected in series and then connected with the other end of the first evaporator 11 and the second evaporator 12 after being connected in parallel.

As shown in fig. 1, in the present embodiment, the medium pressure steam converting unit 2 further includes a medium pressure industrial steam pipe network 16, and the medium pressure industrial steam pipe network 16 connects ports of the first high temperature superheater 8 and the first deaerator 13.

As shown in fig. 1, in the present embodiment, the low-temperature heat source supplier 7, the first evaporator 11, the first secondary preheater 15, and the primary preheater 5 are connected in series.

As shown in fig. 1, in the present embodiment, the secondary medium pressure steam converting unit 3 includes a second high temperature superheater 17, a second low temperature superheater 18, a third evaporator 19, a second secondary preheater 20, a second feedwater pump 21, and a second deaerator 22 connected end to end.

As shown in fig. 1, in the present embodiment, the secondary medium pressure steam converting unit 3 further includes a secondary medium pressure industrial steam pipe network 23, and the secondary medium pressure industrial steam pipe network 23 connects ports of the second high temperature superheater 17 and the second deaerator 22.

As shown in fig. 1, in the present embodiment, the high temperature heat source supplier 6, the second high temperature superheater 17, the second low temperature superheater 18, and the second evaporator 12 are connected in series;

the low temperature heat source supplier 7, the third evaporator 19, the second stage preheater 20 and the first stage preheater 5 are connected in series.

As shown in fig. 1, in the present embodiment, the low-pressure steam converting unit 4 includes a third high-temperature superheater 24, a third low-temperature superheater 25, a fourth evaporator 26, a third secondary preheater 27, a third feed pump 28, and a third deaerator 29, which are connected end to end.

As shown in fig. 1, in the present embodiment, the low-pressure steam converting unit 4 further includes a low-pressure industrial steam pipe network 30, and the low-pressure industrial steam pipe network 30 connects ports of the third high-temperature superheater 24 and the third deaerator 29.

As shown in fig. 1, in the present embodiment, the high temperature heat source supplier 6, the third high temperature superheater 24, the third low temperature superheater 25 and the second evaporator 12 are connected in series;

the low temperature heat source supplier 7, the fourth evaporator 26, the third secondary preheater 27 and the primary preheater 5 are connected in series.

Based on the above scheme of the utility model, in the utility model, as shown in fig. 1, in each structure needing heat exchange and heating, the utility model further adopts a snake-type tube heater, and the snake-type tube heater mainly comprises a water supply inlet and outlet header and a snake-type tube. The thick tube plate and the spherical sealing head in the traditional U-shaped tube heater are replaced by the thin collecting tube, so that the problem of excessive concentration of thermal stress is effectively avoided. Compared with a U-shaped pipe heater, the snake-shaped pipe heater has the following characteristics:

1) High resistance to thermal shock. The traditional tube plate design of the U-shaped tube heater is replaced by the perforation on the main tube, the wall thickness of the main tube is only 15% of the thickness of the tube plate under the same condition, the maximum wall thickness is only 120mm, the thermal stress is uniformly distributed, and the temperature rise rate limitation and the variable working condition operation times are effectively improved.

2) High reliability and long service life. The tube plate of the U-shaped tube heater is connected with the U-shaped tube by adopting fillet weld and expansion joint, and when the unit is frequently started and stopped, the heat stress concentration is easy to cause the leakage of the tube orifice. The snake-shaped pipe heater is welded with the snake-shaped pipe through the forged short joint on the header pipe, 100% ray detection is carried out on the welding seam, and the quality of the welding seam is effectively ensured. Through operation data comparison, the damage rate of the pipe of the snake-shaped pipe heater is far lower than that of the U-shaped pipe heater, and the pipe can effectively operate for more than 50 years. The failure rate of over 100 ten thousand tubes of a 1200-piece snake tube heater produced from 1935 was only 0.013% as counted by the germany BDT company, wherein the failure of the first tube occurred after 20 years of operation.

3) The maintenance mode is simple. The U-shaped pipe heater is operated by people entering the water chamber, the pipe blocking of the U-shaped pipe heater is formed by extending a robot arm into the header, the people operate outside the heater, and the working environment of the U-shaped pipe heater is obviously better than that of the U-shaped pipe heater.

In conclusion, the coil pipe type heater header has the advantages of thinner thickness, better thermal stress adaptability and reliability, simple maintenance mode and capability of better meeting the design requirement of a high-parameter unit.

Furthermore, in the utility model, the utility model provides an industrial steam production system, the high-temperature steam supply adopts the high-temperature gas cooled reactor main steam as a heat source, the low-temperature steam supply adopts the pressurized water reactor main steam as a heat source, and the two types of nuclear power units are coupled to supply industrial steam with three grades of medium pressure, secondary medium pressure and low pressure to a park according to design heat load parameters. The characteristics are that: (1) The prepared industrial steam has high temperature and pressure and large steam flow, and is suitable for more industrial users. (2) The industrial steam with each parameter is independently prepared by adopting multistage overheat, the industrial steam with each parameter adopts high-temperature reactor main steam, the industrial steam with each parameter cannot be mutually influenced, and the industrial steam conversion systems with each parameter are relatively independent. (3) The heater adopts the coiled pipe heat exchanger, reduces equipment quantity, greatly reduces investment and equipment maintenance workload, reduces factory building size, reduces the quantity of matched valves, pipelines, meters and the like, improves standby capacity, and greatly improves economical efficiency. Has wide application prospect.

Specifically, the system heat source of the utility model is combined and supplied by 2 pressurized water reactor units and 1 high-temperature gas cooled reactor unit. The high temperature heat source is from the main steam of the high temperature gas cooled reactor, the parameter is about 13.24MPa (a), the 566 ℃ low temperature heat source is from the main steam parameter of the pressurized water reactor unit is about 6.3MPa (a), the 278.8 ℃ and the humidity is about 0.9%. The three industrial steam parameters required are shown in table 1:

table 1 industrial steam parameter table

The technical scheme of the utility model is not limited to providing industrial steam with the temperature and pressure parameters, and according to the industrial steam conversion system for the nuclear power station, the industrial steam flow can be provided with a single row of up to 2000t/h, the steam pressure can be 1.5MPa to 6.0MPa, the steam temperature can be up to 250 ℃ to 500 ℃, and the application range is wide.

Further, as can be seen from the above-described scheme, the intermediate-pressure steam converting unit 2 is provided with two-stage superheaters, and the secondary intermediate-pressure steam converting unit 3 and the low-pressure steam converting unit 4 are provided with one-stage high-temperature superheaters. And the industrial steam with each parameter is independently prepared, the drain temperature of the main steam of the high-temperature reactor at the outlet of the superheater is taken as the saturation temperature, and the use amount of heating steam at the outlet of the high-temperature superheater is increased. Saturated steam at the outlet of the steam generator has certain humidity, the saturated steam with humidity (the enthalpy value is lower than that of dry saturated steam) enters the low-temperature superheater, and the flow of the utilized heating steam is more, but the main steam consumption of the pressurized water reactor unit can be reduced. In addition, the drain temperature of the main steam of the high-temperature reactor at the outlet of the superheater is still higher, an independent evaporator is arranged to perform heat cascade utilization, the main steam of the pressurized water reactor unit is replaced to evaporate part of medium-pressure industrial steam, and the main steam consumption of the pressurized water reactor unit is reduced. The main steam of the high-temperature reactor is drained through an evaporator and then enters a drain cooler to heat desalted water.

In the utility model, the heat exchanger adopts a coiled pipe, the heat exchange area of a single device is large, and the specific configuration scheme of the device is as follows according to the manufacturing capability of the device:

the equipment and the system in front of the industrial steam deaerator with three parameters adopt a common arrangement, and are provided with 2 rows of drain coolers with 100 percent capacity and a primary preheater, and the equipment and the system operate according to 2 stations with 50 percent capacity.

The medium pressure steam converting unit 2 is provided with 2 deaerators with 100% capacity and operates according to 2 50%. The secondary medium-pressure steam conversion unit and the secondary low-pressure steam conversion unit are respectively provided with 1 deaerator with 100 percent capacity, and are not used.

Steam conversion monocular feed water of each parameter was provided with 2 100% capacity feed pumps, 1 run 1.

The medium pressure steam converting unit 2 is provided with 2 columns of 100% capacity secondary preheater, evaporator, primary superheater (low pass), secondary superheater (medium pass) and tertiary superheater (high pass), and operates at 50% of 2 columns.

The secondary medium pressure steam converting unit 3 is provided with 1 row of 100% capacity secondary preheater, evaporator, primary superheater (low pass) and secondary superheater (high pass).

The low pressure steam converting unit 4 is provided with 1 row of 100% capacity secondary preheater, evaporator, primary superheater (low pass) and secondary superheater (high pass).

The technical scheme of the utility model is applied to the scene that two types of nuclear power units are combined for supplying industrial steam with various parameters, the industrial steam flow range is 2740 t/h-4200 t/h, the steam pressure can be 1.5 MPa-6.0 MPa, the steam temperature can reach 250-500 ℃, and the application range is wide.

Based on the scheme, the utility model provides an industrial steam production system for coupling a pressurized water reactor and a high-temperature gas cooled reactor nuclear power unit, which is used for coupling high-parameter steam required by production industry by using pressurized water reactor nuclear power secondary loop main steam and high-temperature gas cooled reactor nuclear power station secondary loop main steam as heat sources.

In the utility model, the industrial steam preparation system with each parameter is completely independent, the response speed is high, and when the thermal load changes, the power generated by the steam turbine is adjusted at any time, so that the power of the nuclear island is not influenced.

In the utility model, the main steam of the high-temperature reactor enters the superheater, the evaporator and the drain cooler step by step, which is beneficial to the graded utilization of energy and provides the thermal efficiency of the system.

In the utility model, the adopted serpentine pipe heater is used as core equipment, and each stage of preheater, evaporator and superheater all adopt the serpentine pipe heater. Heating steam enters a header pipe of the heater, the tube bundles are arranged in a serpentine mode, the heat exchange area is large, and the heat transfer efficiency is high. Industrial water (steam) enters the housing of the heater to absorb heat.

In the utility model, the outlet of the serpentine evaporator is saturated wet steam, so that the main steam consumption of the pressurized water reactor is reduced, and the heating steam consumption of the primary superheater is increased, thereby balancing the heating steam consumption of the primary superheater and the secondary superheater. And the evaporator outlet does not need to be provided with a separator, so that the system is simplified.

In the utility model, the coil pipe heater is adopted, the total price of heat exchange equipment is about 21234 ten thousand yuan, compared with a shell-and-tube U-shaped pipe heat exchanger, the number of the heat exchangers is reduced by about 30 percent, the size of a factory building can be reduced by about one third, the number of matched valves is reduced by about 50 percent, the operation and maintenance workload is reduced by about 30 percent, and the total cost of the equipment is reduced by about 40 percent.

In the utility model, the industrial steam production system has wide application range, the single industrial steam flow can reach about 2000t/h, the steam pressure can be 1.5 MPa-6 MPa, and the steam temperature can reach 250-500 ℃.

Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the utility model, and that, although the utility model has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the utility model as defined by the appended claims.

Claims (10)

1. An industrial steam production system, comprising: the heat supply device comprises a heat supply unit (1), a medium-pressure steam conversion unit (2), a secondary medium-pressure steam conversion unit (3) and a low-pressure steam conversion unit (4) which are connected with the heat supply unit (1), and a primary preheater (5) which is respectively connected with the medium-pressure steam conversion unit (2), the secondary medium-pressure steam conversion unit (3) and the low-pressure steam conversion unit (4), wherein the heat supply unit (1) comprises a high-temperature heat source supplier (6) and a low-temperature heat source supplier (7).

2. Industrial steam production system according to claim 1, characterized in that the medium pressure steam conversion unit (2) comprises a first high temperature superheater (8), a medium temperature superheater (9), a first low temperature superheater (10), a first evaporator (11), a second evaporator (12), a first deaerator (13), a first feed pump (14) and a first secondary preheater (15);

the first high-temperature superheater (8), the medium-temperature superheater (9) and the first low-temperature superheater (10) are connected end to end and then connected in series with the high-temperature heat source feeder (6) and the second evaporator (12) through pipelines;

one end of the first evaporator (11) and one end of the second evaporator (12) which are connected in parallel are connected with the port of the first low-temperature superheater (10);

the first deaerator (13), the first water supply pump (14) and the first secondary preheater (15) are connected in series and then connected with the other end of the first evaporator (11) and the second evaporator (12) which are connected in parallel.

3. Industrial steam production system according to claim 2, characterized in that the medium pressure steam converting unit (2) further comprises a medium pressure industrial steam pipe network (16), the medium pressure industrial steam pipe network (16) connecting the ports of the first high temperature superheater (8) and the first deaerator (13).

4. An industrial steam production system according to claim 3, characterized in that the low temperature heat source supply (7), the first evaporator (11), the first secondary preheater (15) and the primary preheater (5) are connected in series.

5. Industrial steam production system according to claim 4, characterized in that the secondary medium pressure steam converting unit (3) comprises a second high temperature superheater (17), a second low temperature superheater (18), a third evaporator (19), a second secondary preheater (20), a second feed pump (21) and a second deaerator (22) connected end to end.

6. Industrial steam production system according to claim 5, characterized in that the secondary medium pressure steam converting unit (3) further comprises a secondary medium pressure industrial steam pipe network (23), the secondary medium pressure industrial steam pipe network (23) connecting the ports of the second high temperature superheater (17) and the second deaerator (22).

7. Industrial steam production system according to claim 6, characterized in that the high temperature heat source supply (6), the second high temperature superheater (17), the second low temperature superheater (18) and the second evaporator (12) are connected in series;

the low temperature heat source feeder (7), the third evaporator (19), the second stage preheater (20) and the primary preheater (5) are connected in series.

8. Industrial steam production system according to claim 7, characterized in that the low-pressure steam converting unit (4) comprises a third high-temperature superheater (24), a third low-temperature superheater (25), a fourth evaporator (26), a third secondary preheater (27), a third feed pump (28) and a third deaerator (29) connected end to end.

9. Industrial steam production system according to claim 8, wherein the low pressure steam converting unit (4) further comprises a low pressure industrial steam pipe network (30), the low pressure industrial steam pipe network (30) connecting ports of the third high temperature superheater (24) and the third deaerator (29).

10. Industrial steam production system according to claim 9, characterized in that the high temperature heat source supply (6), the third high temperature superheater (24), the third low temperature superheater (25) and the second evaporator (12) are connected in series;

the low temperature heat source feeder (7), the fourth evaporator (26), the third secondary preheater (27) and the primary preheater (5) are connected in series.