High-temperature powder sensible heat recovery power generation system

Abstract

The utility model discloses a high-temperature powder sensible heat recovery power generation system, and relates to the technical field of industrial waste heat recovery. The high-temperature powder sensible heat recovery power generation system comprises a first bucket elevator, a first-stage cooler, a first air blower, a first-stage cyclone separator, a second-stage cooler, a second air blower, a second-stage cyclone separator, a third-stage cooler, a third-stage cyclone separator, a second bucket elevator, a finished product bin, a zipper machine and an inverted waste heat boiler. A discharging port of the first bucket elevator is communicated with a feeding port of the first-stage cooler, a cold air outlet of the first air blower is communicated with an air inlet of the first-stage cooler, and the output end of the first-stage cooler is communicated with the input end of the first-stage cyclone separator. And an air outlet pipe of the primary cyclone separator extends into the inverted waste heat boiler. A three-stage gas-solid heat exchange scheme is adopted, the heat exchange process is stable and controllable, sensible heat of the high-temperature powder can be effectively recycled, system benefits are improved, no waste gas is exhausted in the whole process, and environmental protection benefits are good.

Description

Technical Field

[0001] The present application relates to the technical field of industrial waste heat recovery, and specifically to a high-temperature powder sensible heat recovery and power generation system. Background Art

[0002] High-temperature powders are widely present in various industrial production processes. Due to their lack of natural fluidity and poor thermal conductivity, the physical sensible heat recovery of high-temperature powders faces complex challenges that are not encountered in the recovery of fluid waste heat.

[0003] Currently, the mainstream strategy for sensible heat recovery of high-temperature powder materials relies on slag cooler technology. Although this method can effectively extract heat energy and convert it into hot water to meet the hot water needs in daily life or industrial production, its limitations cannot be ignored.

[0004] Given the high temperature and high-quality waste heat contained in high-temperature powders, and the relatively limited application scenarios of hot water, this directly leads to low sensible heat recovery efficiency and the failure to fully recycle a large amount of valuable resources. Therefore, we propose a high-temperature powder sensible heat recovery power generation system to solve the above problems. Utility Model Content

[0005] The purpose of this application is to provide a high-temperature powder sensible heat recovery power generation system to solve the problems in the above-mentioned background technology, such as low sensible heat recovery efficiency and failure to fully recycle a large amount of valuable resources due to the relatively limited application scenarios of hot water.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a high-temperature powder sensible heat recovery and power generation system, comprising a first bucket elevator, a first-stage cooler, a first blower, a first-stage cyclone separator, a second-stage cooler, a second blower, a second-stage cyclone separator, a third-stage cooler, a third-stage cyclone separator, a second bucket elevator, a finished product bin and a zipper machine and an inverted waste heat boiler, the discharge port of the first bucket elevator is connected to the feed port of the first-stage cooler, the cold air outlet of the first blower is connected to the air inlet of the first-stage cooler, the output end of the first-stage cooler is connected to the first-stage cyclone separator, and the cooling air outlet of the first blower is connected to the air inlet of the first-stage cooler. The input end of the separator is connected, the outlet pipe of the first-stage cyclone separator extends to the interior of the inverted waste heat boiler, the discharge pipe of the first-stage cyclone separator is connected to the feed port of the second-stage cooler, the cold air outlet of the second blower is connected to the air inlet of the second cooler, the output end of the second cooler is connected to the input end of the second-stage cyclone separator, the discharge pipe of the second-stage cyclone separator is connected to the tertiary cooler, the output end of the tertiary cooler is connected to the input end of the tertiary cyclone separator, and the outlet pipe of the tertiary cyclone separator is connected to the first blower.

[0007] Preferably, the discharge pipe of the three-stage cyclone separator extends into the zipper machine, and the bottom discharge ports of the first-stage cooler, the second-stage cooler and the third-stage cooler are connected to the zipper machine via a discharge chute.

[0008] Preferably, the discharge port of the zipper machine is connected to the feed port of the second bucket elevator, and the discharge port of the second bucket elevator is connected to the feed port of the finished product warehouse.

[0009] Preferably, the interior of the inverted waste heat boiler is provided with a high-pressure superheater, a high-temperature evaporator, a high-temperature economizer, a low-pressure superheater, a low-pressure evaporator and a low-temperature economizer in sequence from bottom to top.

[0010] Preferably, the outlet of the low-temperature economizer is connected to the inlet of the high-temperature economizer and the low-pressure steam drum, the outlet of the high-temperature economizer is connected to the high-pressure steam drum, the high-pressure steam drum is connected to the inlet of the high-temperature evaporator, the outlet of the high-temperature evaporator is connected to the inlet of the high-pressure superheater, the outlet of the high-pressure superheater is connected to the steam turbine, and the outlet of the high-pressure superheater is connected to the main steam valve of the steam turbine, the outlet of the low-pressure steam drum is connected to the inlet of the low-pressure evaporator, the outlet of the low-pressure evaporator is connected to the inlet of the low-pressure superheater, the outlet of the low-pressure superheater is connected to the air supply port of the steam turbine, the exhaust port of the steam turbine is connected to a condenser, the outlet water of the condenser is connected to the inlet of the shaft seal heater through the outlet of the condensate pump, the outlet of the shaft seal heater is connected to a deaerator, the feed water is deoxygenated by the deaerator and sent to the low-temperature economizer for preheating through the feed water pump, the exhaust steam discharged from the steam turbine enters the condenser to release heat and condense into water, and the steam turbine is connected to a generator.

[0011] Preferably, a circulating cooling water pump is installed at the input end of the condenser, and a cooling tower is installed at the input end of the circulating cooling water pump.

[0012] Preferably, the hot air outlet of the inverted waste heat boiler is connected to the dust collector, the output end of the dust collector is connected to the input end of the induced draft fan, and the cold air outlet of the induced draft fan is connected to the air inlet of the tertiary cooler.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. A three-stage gas-solid heat exchange method is adopted to first transfer the sensible heat of the high-temperature powder to the gas, and then the waste heat of the exhaust gas is recovered through the waste heat boiler. The entire heat exchange process is stable and controllable, and the sensible heat of the high-temperature powder can be effectively recovered.

[0015] 2. After heat exchange and cooling in the waste heat boiler, the exhaust gas is recycled as the cooling air of the three-stage cooler. No exhaust gas is discharged during the whole process, which has good environmental benefits.

[0016] 3. The waste heat boiler adopts an inverted boiler, which can effectively reduce the dust accumulation on the boiler heat exchange surface, and the dual-pressure system can effectively recover the waste heat of the exhaust gas and improve the system benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0018] Explanation of the accompanying symbols: 1. first bucket elevator; 2. primary cooler; 201. first blower; 3. primary cyclone separator; 4. secondary cooler; 401. second blower; 5. secondary cyclone separator; 6. tertiary cooler; 7. tertiary cyclone separator; 8. second bucket elevator; 9. finished product bin; 10. zipper machine; 11. inverted waste heat boiler; 12. low-temperature economizer; 13. low-pressure evaporator; 14. low-pressure superheater; 15. high-temperature economizer; 16. high-temperature evaporator; 17. high-pressure superheater; 18. low-pressure steam drum; 19. high-pressure steam drum; 20. dust collector; 21. induced draft fan; 22. steam turbine; 23. generator; 24. condensate pump; 25. shaft seal heater; 26. deaerator; 27. feed water pump; 28. condenser; 29. ​​circulating cooling water pump; 30. cooling tower DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0020] like Figure 1 The figure shows an embodiment provided by the present application: a high-temperature powder sensible heat recovery power generation system, comprising a first bucket elevator 1, a first-stage cooler 2, a first blower 201, a first-stage cyclone separator 3, a second-stage cooler 4, a second blower 401, a second-stage cyclone separator 5, a third-stage cooler 6, a third-stage cyclone separator 7, a second bucket elevator 8, a finished product bin 9 and a zipper machine 10 and an inverted waste heat boiler 11, the discharge port of the first bucket elevator 1 is connected to the feed port of the first-stage cooler 2, the cold air outlet of the first blower 201 is connected to the air inlet of the first-stage cooler 2, the output end of the first-stage cooler 2 is connected to the first The input end of the cyclone separator 3 is connected, the outlet pipe of the first-stage cyclone separator 3 extends to the interior of the inverted waste heat boiler 11, the discharge pipe of the first-stage cyclone separator 3 is connected to the feed port of the second-stage cooler 4, the cold air outlet of the second blower 401 is connected to the air inlet of the second-stage cooler 4, the output end of the second-stage cooler 4 is connected to the input end of the second-stage cyclone separator 5, the discharge pipe of the second-stage cyclone separator 5 is connected to the third-stage cooler 6, the output end of the third-stage cooler 6 is connected to the input end of the third-stage cyclone separator 7, and the outlet pipe of the third-stage cyclone separator 7 is connected to the first blower 201.

[0021] The discharge pipe of the three-stage cyclone separator 7 extends into the zipper machine 10, and the bottom discharge ports of the first-stage cooler 2, the second-stage cooler 4 and the third-stage cooler 6 are connected to the zipper machine 10 through the discharge chute.

[0022] The discharge port of the zipper machine 10 is connected to the feed port of the second bucket elevator 8 , and the discharge port of the second bucket elevator 8 is connected to the feed port of the finished product bin 9 .

[0023] The inverted waste heat boiler 11 is provided with a high-pressure superheater 17, a high-temperature evaporator 16, a high-temperature economizer 15, a low-pressure superheater 14, a low-pressure evaporator 13 and a low-temperature economizer 12 in order from bottom to top.

[0024] The outlet of the low-temperature economizer 12 is connected to the inlet of the high-temperature economizer 15 and the low-pressure drum 18. The outlet of the high-temperature economizer 15 is connected to the high-pressure drum 19. The high-pressure drum 19 is connected to the inlet of the high-temperature evaporator 16. The outlet of the high-temperature evaporator 16 is connected to the inlet of the high-pressure superheater 17. The outlet of the high-pressure superheater 17 is connected to the turbine 22, and the outlet of the high-pressure superheater 17 is connected to the main steam valve of the turbine 22. The outlet of the low-pressure drum 18 is connected to the inlet of the low-pressure evaporator 13, and the outlet of the low-pressure evaporator 13 is connected to the main steam valve of the steam turbine 22. The inlet of the low-pressure superheater 14 is connected, the outlet of the low-pressure superheater 14 is connected to the air supply port of the turbine 22, the exhaust port of the turbine 22 is connected to the condenser 28, the outlet water of the condenser 28 is connected to the inlet of the shaft seal heater 25 through the outlet of the condensate pump 24, the outlet of the shaft seal heater 25 is connected to the deaerator 26, the feed water is deoxygenated by the deaerator 26 and is sent to the low-temperature economizer 12 for preheating through the feed water pump 27, the exhaust steam discharged from the turbine 22 enters the condenser 28 to release heat and condense into water, and the turbine 22 is connected to the generator 23.

[0025] A circulating cooling water pump 29 is installed at the input end of the condenser 28 , and a cooling tower 30 is installed at the input end of the circulating cooling water pump 29 .

[0026] The hot air outlet of the inverted waste heat boiler 11 is connected to the dust collector 20, the output end of the dust collector 20 is connected to the input end of the induced draft fan 21, and the cold air outlet of the induced draft fan 21 is connected to the air inlet of the tertiary cooler 6.

[0027] The main working process of the above-mentioned high-temperature powder sensible heat recovery power generation system is as follows:

[0028] S1: High-temperature powder at 800-1200°C enters the first bucket elevator 1 through point A in the figure, and is transported by the first bucket elevator 1 to the primary cooler 2. After heat exchange with the cooling air blown by the first blower 201 in the primary cooler 2, the first material-gas heat exchange is completed. Then, the powder enters the primary cyclone separator 3 for gas-solid separation. The hot air enters the inverted waste heat boiler 11 through the outlet pipe of the primary cyclone separator 3, and the high-temperature powder enters the secondary cooler 4 through the discharge pipe of the primary cyclone separator 3.

[0029] S2: After the high-temperature powder has completed the first heat exchange between the material and gas, it contacts and exchanges heat with the cooling air blown by the second blower 401 in the secondary cooler 4 to complete the second heat exchange between the material and gas. Then, the powder enters the secondary cyclone separator 5 for gas-solid separation. The hot air enters the first blower 201 from the outlet pipe of the secondary cyclone separator 5 and serves as the cooling air for the primary cooler 2. The high-temperature powder enters the tertiary cooler 6 from the discharge pipe of the secondary cyclone separator 5.

[0030] S3: After the second heat exchange between the high-temperature powder and the cooling air sent by the induced draft fan 21, the high-temperature powder contacts and exchanges heat with the cooling air in the tertiary cooler 6 to complete the third heat exchange between the powder and the air. The powder then enters the tertiary cyclone separator 7 for gas-solid separation. The hot air enters the second blower 401 through the outlet pipe of the tertiary cyclone separator 7 to serve as cooling air for the secondary cooler 4.

[0031] S4: After the third heat exchange between the material and the gas, the high-temperature powder is cooled to below 150°C and discharged from the discharge pipe of the three-stage cyclone separator 7. The powder is then combined with the bottom discharge of the first-stage cooler 2, the second-stage cooler 4 and the third-stage cooler 6 and sent to the finished product warehouse 9 by the zipper machine 10.

[0032] S5: The 500-600°C hot air generated in S1 enters the inverted waste heat boiler 11 through the outlet pipe of the first-stage cyclone separator 3, and then passes through the high-pressure superheater 17, high-temperature evaporator 16, high-temperature economizer 15, low-pressure superheater 14, low-pressure evaporator 13, and low-temperature economizer 12 in sequence to heat the working medium. After heat exchange and cooling, it enters the dust collector 20 for dust removal, and is then sent by the induced draft fan 21 to the tertiary cooler 6 to be recycled as cooling air. The above S1-S5 processes are then repeated.

[0033] S6: The cold water pumped by the feed water pump 27 enters the low-temperature economizer 12 for preheating and is divided into two paths:

[0034] The first route is sent to the low-pressure drum 18, then enters the low-pressure evaporator 13 through the downcomer to be heated into saturated steam, and then enters the low-pressure drum 18 through the riser. The saturated steam is discharged from the low-pressure drum 18 and enters the low-pressure superheater 14 to be heated to produce low-pressure superheated steam;

[0035] The second path is sent to the high-temperature economizer 15 for heating, then enters the high-pressure steam drum 19, and then enters the high-temperature evaporator 16 through the downcomer to be heated into saturated steam, and then enters the high-pressure steam drum 19 through the riser. After the saturated steam is discharged from the high-pressure steam drum 19, it enters the high-pressure superheater 17 for heating to produce high-pressure superheated steam;

[0036] S7: The high-pressure superheated steam and the low-pressure superheated steam generated in S6 are sent to the steam turbine 22 to expand and perform work to become exhaust steam, so as to enable the generator 23 to generate electricity;

[0037] S8: The exhaust steam from the steam turbine 22 is discharged into the condenser 28 to release heat and condense into water; the circulating cooling water pump 29 pumps the cooling water in the water pool of the cooling tower 30 into the condenser 28 through the cooling water pipe for absorption, and then discharges it to the cooling tower 30 through the cooling water pipe for cooling. The cooled water is finally returned to the water pool for recycling;

[0038] S9: The condensate from the condenser 28 is sent to the shaft seal heater 25 for preheating by the condensate pump 24, and then enters the deaerator 26 for deoxygenation. It is then sent to the low-temperature economizer 12 for preheating by the feed water pump 27, and then the above S6-S9 process is repeated.

[0039] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A high-temperature powder sensible heat recovery power generation system, comprising a first bucket elevator (1), a first-stage cooler (2), a first blower (201), a first-stage cyclone separator (3), a second-stage cooler (4), a second blower (401), a second-stage cyclone separator (5), a third-stage cooler (6), a third-stage cyclone separator (7), a second bucket elevator (8), a finished product bin (9), a zipper machine (10), and an inverted waste heat boiler (11), characterized in that: The discharge port of the first bucket elevator (1) is connected to the feed port of the first cooler (2), the cold air outlet of the first blower (201) is connected to the air inlet of the first cooler (2), the output end of the first cooler (2) is connected to the input end of the first cyclone separator (3), the air outlet pipe of the first cyclone separator (3) extends to the interior of the inverted waste heat boiler (11), and the discharge pipe of the first cyclone separator (3) is connected to the feed port of the second cooler (4). The cold air outlet of the second blower (401) is connected to the air inlet of the secondary cooler (4), the output end of the secondary cooler (4) is connected to the input end of the secondary cyclone separator (5), the discharge pipe of the secondary cyclone separator (5) is connected to the tertiary cooler (6), the output end of the tertiary cooler (6) is connected to the input end of the tertiary cyclone separator (7), and the air outlet pipe of the tertiary cyclone separator (7) is connected to the first blower (201).

2. The high-temperature powder sensible heat recovery power generation system according to claim 1, characterized in that: The discharge pipe of the three-stage cyclone separator (7) extends into the zipper machine (10), and the bottom discharge ports of the first-stage cooler (2), the second-stage cooler (4), and the third-stage cooler (6) are connected to the zipper machine (10) via a discharge chute.

3. The high-temperature powder sensible heat recovery power generation system according to claim 1, characterized in that: The discharge port of the zipper machine (10) is connected to the feed port of the second bucket elevator (8), and the discharge port of the second bucket elevator (8) is connected to the feed port of the finished product bin (9).

4. The high-temperature powder sensible heat recovery power generation system according to claim 1, characterized in that: The inverted waste heat boiler (11) is provided with a high-pressure superheater (17), a high-temperature evaporator (16), a high-temperature economizer (15), a low-pressure superheater (14), a low-pressure evaporator (13) and a low-temperature economizer (12) in order from bottom to top.

5. The high-temperature powder sensible heat recovery power generation system according to claim 4, characterized in that: The outlet of the low-temperature economizer (12) is connected to the inlet of the high-temperature economizer (15) and the low-pressure drum (18). The outlet of the high-temperature economizer (15) is connected to the high-pressure drum (19). The high-pressure drum (19) is connected to the inlet of the high-temperature evaporator (16). The outlet of the high-temperature evaporator (16) is connected to the inlet of the high-pressure superheater (17). The outlet of the high-pressure superheater (17) is connected to the turbine (22), and the outlet of the high-pressure superheater (17) is connected to the main steam valve of the turbine (22). The outlet of the low-pressure drum (18) is connected to the inlet of the low-pressure evaporator (13). The outlet of the low-pressure evaporator (13) is connected to the inlet of the low-pressure evaporator (13). The inlet of the high-pressure superheater (14) is connected, the outlet of the low-pressure superheater (14) is connected to the air supply port of the steam turbine (22), the exhaust port of the steam turbine (22) is connected to a condenser (28), the outlet water of the condenser (28) is connected to the inlet of the shaft seal heater (25) through the outlet of the condensate pump (24), the outlet of the shaft seal heater (25) is connected to a deaerator (26), the feed water is deoxygenated by the deaerator (26) and then sent to the low-temperature economizer (12) for preheating through the feed water pump (27), the exhaust steam discharged from the steam turbine (22) enters the condenser (28) to release heat and condense into water, and the steam turbine (22) is connected to the generator (23).

6. The high-temperature powder sensible heat recovery power generation system according to claim 5, characterized in that: A circulating cooling water pump (29) is installed at the input end of the condenser (28), and a cooling tower (30) is installed at the input end of the circulating cooling water pump (29).

7. The high-temperature powder sensible heat recovery power generation system according to claim 1, characterized in that: The hot air outlet of the inverted waste heat boiler (11) is connected to the dust collector (20), the output end of the dust collector (20) is connected to the input end of the induced draft fan (21), and the cold air outlet of the induced draft fan (21) is connected to the air inlet of the tertiary cooler (6).

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