Waste heat utilization system for continuously-discharged steam of waste heat boiler drum

Abstract

A heater is connected with a boiler economizer through a first heat preservation pipe, and the first heat preservation pipe is provided with a first filtering part, a first control valve and a first reverse valve; the boiler economizer further comprises a second heat preservation pipe, the second heat preservation pipe is connected with the two ends of the first filtering part, a second filtering part, a second control valve and a second reversing valve are arranged on the second heat preservation pipe, the second control valve and the second reversing valve are located at the two ends of the second filtering part respectively, and the second reversing valve is located between the second filtering part and the boiler economizer. The heat loss of the feed water temperature in the first heat preservation pipe can be effectively reduced, impurities in the feed water can be filtered out, normal operation of the system can still be guaranteed when the first heat preservation pipe and the first filtering part are maintained or replaced, the water supply function is more stable, and the operation performance of the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat boilers, in particular to a waste heat utilization system of a waste heat boiler steam drum connected with steam. Background Art

[0002] The development and application of waste heat recovery technology is an important measure for energy conservation and emission reduction in industrial production. Especially in cement production, a typical high-energy-consuming and high-pollution industry, how to develop and apply waste heat recovery technology for cement production lines has become a hot topic in technology research and development.

[0003] In the prior art, the technology for recycling high-grade waste heat rich in high-temperature flue gas discharged from the kiln head and kiln tail of cement kilns is relatively mature, but there are still some areas that need to be improved in the technology for recycling pure medium-low temperature and low-grade waste heat from the kiln head of cement kilns. For example, the prior art of commonly used cement waste heat recovery systems includes two types: single-pressure thermal system and double-pressure thermal system.

[0004] However, both of the above waste heat power generation schemes cannot achieve efficient recovery and utilization of waste heat. Later, a waste heat boiler drum steam waste heat utilization system appeared, such as a waste heat boiler drum steam waste heat utilization system with application number 202452852U published on September 26, 2012, which can recover and utilize waste heat.

[0005] However, it still has the following defects: the insulation effect of the pipeline between the heater and the boiler economizer is poor, temperature loss is prone to occur, and then the feed water temperature is affected.

[0006] Therefore, in the patent application for the utility model, the applicant has carefully studied a waste heat utilization system of a waste heat boiler drum connected with steam to solve the above problems. Utility Model Content

[0007] The utility model aims at the deficiencies existing in the above-mentioned prior art, and its main purpose is to provide a waste heat utilization system of a waste heat boiler drum connected with steam, which can effectively reduce the heat loss of the feed water temperature in the first insulation pipe and can filter out impurities in the feed water, and can still ensure the normal operation of the system when repairing or replacing the first insulation pipe and the first filter part, so that the water supply function is more stable and the operating performance of the system is improved.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0009] A waste heat boiler drum steam waste heat utilization system, comprising a heater, a deaerator, a first feed water pump, a boiler economizer, a serial expansion container, a chimney and a drum of a kiln head waste heat boiler;

[0010] The steam outlet of the drum of the kiln head waste heat boiler is connected to the row expansion container through the first pipeline, the steam inlet of the heater is connected to the first pipeline through the second pipeline, and the steam outlet of the heater is connected to the chimney;

[0011] The deaerator is connected to a first feed water pump, and the first feed water pump is connected to a feed water inlet of the heater through a third pipeline;

[0012] The feed water outlet of the heater is connected to one end of the boiler economizer through a first insulation pipe, on which a first filter, a first control valve and a first reverse valve are provided, the first control valve and the first reverse valve are respectively located at two ends of the first filter, and the first reverse valve is located between the first filter and the boiler economizer; the other end of the boiler economizer is connected to the steam inlet of the drum of the kiln head waste heat boiler;

[0013] It also includes a second insulation pipe, the two ends of the second insulation pipe are respectively connected to the two ends of the first filter part, and the first control valve is located on a side of the connection between the second insulation pipe and the first insulation pipe close to the first filter part;

[0014] The second insulation tube is provided with a second filter part, a second control valve and a second reverse valve. The second control valve and the second reverse valve are respectively located at two ends of the second filter part. The second reverse valve is located between the second filter part and the boiler economizer.

[0015] As a preferred solution, it also includes a heat storage water supply unit, the water outlet of the heat storage water supply unit is connected to the steam inlet of the steam drum of the kiln head waste heat boiler through a third insulation pipe, a third control valve is arranged on the third insulation pipe, and a fourth control valve is arranged at the other end of the boiler economizer, and the fourth control valve is connected to the steam inlet of the steam drum of the kiln head waste heat boiler.

[0016] As a preferred solution, a second water supply pump is provided at the water outlet of the heat storage water supply unit, and the second water supply pump is connected to the steam inlet of the drum of the kiln head waste heat boiler through a third insulation pipe.

[0017] As a preferred solution, the first filter part includes a first box body and a first insulation pad arranged on the inner wall of the first box body, and a first filter net is longitudinally arranged on the inner cavity of the first box body.

[0018] As a preferred solution, the second filter part includes a second box body and a second insulation pad arranged on the inner wall of the second box body, and a second filter net is longitudinally arranged in the inner cavity of the second box body.

[0019] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, the utility model mainly adopts the first insulation tube and the first filter part between the heater and the boiler economizer, which can effectively reduce the heat loss of the feed water temperature in the first insulation tube and filter the impurities in the feed water. In particular, through the cooperation of the second insulation tube and the second filter part, when the first insulation tube and the first filter part are repaired or replaced, the normal operation of the system can still be guaranteed, so that the water supply function is more stable and the operation performance of the system is improved.

[0020] Secondly, through the design of the heat storage water supply unit and the insulation pipe, the normal supply of water can be guaranteed when the boiler economizer is repaired or replaced, thereby ensuring the normal operation of the system and improving the system's operating performance.

[0021] In order to more clearly illustrate the structural features and effects of the present invention, it is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the first filter part of an embodiment of the utility model.

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the second filter portion of an embodiment of the utility model.

[0025] Description of Figure Numbers:

[0026] 11. Heater 12. Deaerator

[0027] 13. First feed water pump 14. Boiler economizer

[0028] 15. Row expansion tank 16. Chimney

[0029] 17. Steam drum

[0030] 21. First pipeline 22. Second pipeline

[0031] 23. The third channel

[0032] 31. First insulation pipe

[0033] 311. First filter unit

[0034] 3111, first box 3112, first insulation pad

[0035] 3113, First Filter

[0036] 312. First control valve

[0037] 313. First reverse valve

[0038] 32. Second insulation pipe

[0039] 321. Second filter unit

[0040] 3211, second box 3212, second insulation pad

[0041] 322, second control valve 323, second reverse valve

[0042] 33. Thermal storage water supply unit

[0043] 331. Third insulation pipe 332. Third control valve

[0044] 333. Fourth control valve 334. Second water supply pump. DETAILED DESCRIPTION

[0045] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0046] like Figures 1 to 3 As shown, a waste heat utilization system of a waste heat boiler drum 17 connected with steam includes a heater 11, a deaerator 12, a first feed water pump 13, a boiler economizer 14, a continuous expansion tank 15, a chimney 16 and a drum 17 of a kiln head waste heat boiler.

[0047] The steam outlet of the drum 17 of the kiln head waste heat boiler is connected to the serial expansion tank 15 through the first pipeline 21, the steam inlet of the heater 11 is connected to the first pipeline 21 through the second pipeline 22, and the steam outlet of the heater 11 is connected to the chimney 16.

[0048] The deaerator 12 is connected to a first water supply pump 13 , and the first water supply pump 13 is connected to a water supply inlet of the heater 11 through a third pipeline 23 .

[0049] The feed water outlet of the heater 11 is connected to one end of the boiler economizer 14 through a first insulation pipe 31, and a first filter part 311, a first control valve 312 and a first reverse valve 313 are provided on the first insulation pipe 31, the first control valve 312 and the first reverse valve 313 are respectively located at the two ends of the first filter part 311, and the first reverse valve 313 is located between the first filter part 311 and the boiler economizer 14; the other end of the boiler economizer 14 is connected to the steam inlet of the steam drum 17 of the kiln head waste heat boiler.

[0050] It also includes a second insulation pipe 32 and a heat storage water supply unit 33, the two ends of the second insulation pipe 32 are respectively connected to the two ends of the first filter part 311, and the first control valve 312 is located at the connection between the second insulation pipe 32 and the first insulation pipe 31, on the side close to the first filter part 311. In this embodiment, the first filter part 311 includes a first box body 3111 and a first insulation pad 3112 arranged on the inner wall of the first box body 3111, and the inner cavity of the first box body 3111 is longitudinally provided with a first filter net 3113.

[0051] The second insulation pipe 32 is provided with a second filter 321, a second control valve 322, and a second reverse valve 323. The second control valve 322 and the second reverse valve 323 are respectively located at two ends of the second filter 321, and the second reverse valve 323 is located between the second filter 321 and the boiler economizer 14. In this embodiment, the second filter 321 includes a second box 3211 and a second insulation pad 3212 arranged on the inner wall of the second box 3211, and a second filter 3213 is longitudinally arranged in the inner cavity of the second box 3211.

[0052] When the first filter 311 needs to be repaired or replaced, the first control valve 312 and the first reverse valve 313 need only be closed first, and then the second control valve 322 and the second reverse valve 323 need to be opened to ensure that the water from the heater 11 is normally output to one end of the boiler economizer 14 through the second insulation pipe 32 and the second filter 321. Similarly, after the first filter 311 is replaced, the second control valve 322 and the second reverse valve 323 need to be closed first, and then the first control valve 312 and the first reverse valve 313 need to be reopened and closed, thereby ensuring that the water from the heater 11 is normally output to one end of the boiler economizer 14 through the first insulation pipe 31 and the first filter 311 again.

[0053] In this embodiment, the outlet of the thermal storage water supply unit 33 is connected to the steam inlet of the drum 17 of the kiln head waste heat boiler through the third insulation pipe 331, and the third control valve 332 is provided on the third insulation pipe 331. The other end of the boiler economizer 14 is provided with a fourth control valve 333, and the fourth control valve 333 is connected to the steam inlet of the drum 17 of the kiln head waste heat boiler. Preferably, the outlet of the thermal storage water supply unit 33 is provided with a second water supply pump 334, and the second water supply pump 334 is connected to the steam inlet of the drum 17 of the kiln head waste heat boiler through the third insulation pipe 331. Preferably, the thermal storage water supply unit 33 is a hot water storage tank.

[0054] The key points of the design of the utility model are that it mainly adopts the first insulation tube and the first filter part between the heater and the boiler economizer, which can effectively reduce the heat loss of the feed water temperature in the first insulation tube and filter the impurities in the feed water. In particular, through the cooperation of the second insulation tube and the second filter part, when the first insulation tube and the first filter part are repaired or replaced, the normal operation of the system can still be guaranteed, so that the water supply function is more stable and the operation performance of the system is improved.

[0055] Secondly, through the design of the heat storage water supply unit and the insulation pipe, the normal supply of water can be guaranteed when the boiler economizer is repaired or replaced, thereby ensuring the normal operation of the system and improving the system's operating performance.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A waste heat boiler drum and steam waste heat utilization system, comprising a heater, a deaerator, a first feed water pump, a boiler economizer, a series expansion container, a chimney and a drum of a kiln head waste heat boiler; The steam outlet of the drum of the kiln head waste heat boiler is connected to the row expansion container through the first pipeline, the steam inlet of the heater is connected to the first pipeline through the second pipeline, and the steam outlet of the heater is connected to the chimney; The deaerator is connected to the first water supply pump, and the first water supply pump is connected to the water supply inlet of the heater through a third pipeline, characterized in that: The feed water outlet of the heater is connected to one end of the boiler economizer through a first insulation pipe, on which a first filter, a first control valve and a first reverse valve are provided, the first control valve and the first reverse valve are respectively located at two ends of the first filter, and the first reverse valve is located between the first filter and the boiler economizer; the other end of the boiler economizer is connected to the steam inlet of the drum of the kiln head waste heat boiler; It also includes a second insulation pipe, the two ends of the second insulation pipe are respectively connected to the two ends of the first filter part, and the first control valve is located on a side of the connection between the second insulation pipe and the first insulation pipe close to the first filter part; The second insulation tube is provided with a second filter part, a second control valve and a second reverse valve. The second control valve and the second reverse valve are respectively located at two ends of the second filter part. The second reverse valve is located between the second filter part and the boiler economizer.

2. The waste heat utilization system of waste heat boiler drum steam according to claim 1 is characterized in that: It also includes a heat storage water supply unit, the water outlet of which is connected to the steam inlet of the drum of the kiln head waste heat boiler through a third insulation pipe, a third control valve is arranged on the third insulation pipe, and a fourth control valve is arranged at the other end of the boiler economizer, and the fourth control valve is connected to the steam inlet of the drum of the kiln head waste heat boiler.

3. The waste heat utilization system of waste heat boiler drum steam according to claim 2 is characterized in that: The water outlet of the heat storage water supply unit is provided with a second water supply pump, and the second water supply pump is connected to the steam inlet of the drum of the kiln head waste heat boiler through the third insulation pipe.

4. The waste heat utilization system of waste heat boiler drum steam according to claim 1 is characterized in that: The first filter unit includes a first box body and a first insulation pad arranged on the inner wall of the first box body, and a first filter net is longitudinally arranged in the inner cavity of the first box body.

5. The waste heat utilization system of waste heat boiler drum steam according to claim 1 is characterized in that: The second filter part includes a second box body and a second insulation pad arranged on the inner wall of the second box body, and a second filter net is longitudinally arranged in the inner cavity of the second box body.

Images