Waste heat boiler suitable for pure oxygen combustion-supporting glass kiln
By introducing water-cooled walls and flue gas duct structures into the waste heat boiler of the glass kiln, and adding components such as evaporators and superheater tube panels, the problem of high-temperature flue gas utilization has been solved, achieving economical and efficient waste heat recovery and power generation, and meeting environmental protection requirements.
Patent Information
- Application Number
- CN202520381518.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-06
AI Technical Summary
Existing waste heat boiler equipment for glass kilns cannot effectively utilize the high-temperature flue gas discharged from pure oxygen-assisted combustion glass kilns, which can reach temperatures of 800–1000°C, and it is difficult to meet the requirements of environmental protection equipment for flue gas temperature.
The system adopts a water-cooled wall flue and a protective plate flue configuration, and adds evaporator tube panels, superheater tube panels, economizer housing modules and evaporator housing modules. Combined with the denitrification system, it can achieve efficient recovery and utilization of flue gas and maintain normal boiler operation under abnormal conditions.
It achieves the economic value recovery of high-temperature flue gas, reduces the flue gas temperature to the requirements of environmental protection equipment, ensures the normal operation of the boiler, and improves heat utilization and power generation efficiency.
Smart Images
Figure CN223924753U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of boiler equipment technology, specifically a waste heat boiler suitable for pure oxygen-assisted combustion glass kilns. Background Technology
[0002] Conventional waste heat boilers for glass kilns are only suitable for flue gas temperatures below 600℃. However, with the gradual improvement of glass kiln production processes, the flue gas temperature discharged from pure oxygen-assisted combustion glass kilns has significantly increased, reaching 800–1000℃. The high-temperature flue gas at the tail end of these kilns is of high quality, and waste heat utilization can generate considerable economic value. Furthermore, with increasingly comprehensive and stringent national environmental regulations, glass factories urgently need this new type of waste heat boiler for glass kilns that can recover and utilize waste heat. Utility Model Content
[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a waste heat boiler suitable for pure oxygen-assisted combustion glass kilns. It adopts a water-cooled wall flue + ducted flue configuration, which has the advantages of conventional glass kiln waste heat boilers. In addition, it adds evaporator tube panel, superheater tube panel, economizer box module and evaporator box module, which can recover and utilize flue gas to generate economic value. At the same time, it can reduce the flue gas to the temperature required by environmental protection equipment, meet the requirements of flue gas purification, and fill the gap in conventional glass kiln waste heat boilers that cannot utilize flue gas above 550℃.
[0004] The purpose of this utility model is achieved through the following technical solution: a waste heat boiler suitable for pure oxygen-assisted combustion glass kilns, the waste heat boiler comprising a water-cooled wall flue, a liner flue, and a steam drum, wherein the water-cooled wall flue is connected to the liner flue, the water-cooled wall flue is provided with an evaporator tube panel and a superheater tube panel, the liner flue is provided with an economizer housing module and an evaporator housing module, the economizer housing module is connected to the steam drum, and the steam drum is respectively connected to the evaporator tube panel, the evaporator housing module, and the superheater tube panel, and the high-temperature flue gas sequentially passes through the water-cooled wall. The flue and ductwork provide heat to the evaporator tube panel, superheater tube panel, economizer housing module, and evaporator housing module. The water that needs to be heated first enters the economizer housing module for initial heating. The hot water is then sent to the steam drum, where it enters the evaporator housing module and evaporator tube panel for a second heating to produce a saturated steam-water mixture. This mixture then enters the steam drum, and the saturated steam is sent to the superheater tube panel for a third heating to produce superheated steam at a certain temperature and pressure, which is then sent to the turbine-generator for power generation. The steam drum is used to achieve steam-water separation.
[0005] The ductwork includes a denitrification outlet flue, a denitrification return flue, a turning flue, and an outlet flue. The denitrification outlet flue is connected to the descending section flue. A denitrification outlet is located at the bottom of the denitrification outlet flue, and a post-denitrification inlet is located at the bottom of the denitrification return flue. The denitrification outlet and the post-denitrification inlet are respectively connected to flue gas purification equipment. The denitrification return flue is connected to the outlet flue via a turning flue. A flue gas outlet is located at the bottom of the outlet flue. The economizer housing module and the evaporator housing module are installed on the denitrification return flue and the outlet flue. The economizer housing module includes a first economizer housing module, a second economizer housing module, a third economizer housing module, and a fourth economizer housing module. The evaporator housing module includes a first evaporator housing module and a second evaporator housing module. The economizer housing module, the fourth economizer housing module, the first evaporator housing module, and the second evaporator housing module are installed on the denitrification return flue. The first economizer housing module, the second economizer housing module, and the third economizer housing module are installed on the outlet flue. The steam drum is connected to the first economizer housing module, the second economizer housing module, the third economizer housing module, and the fourth economizer housing module through steam-water pipes. The steam drum is also connected to the first evaporator housing module and the second evaporator housing module through steam-water pipes. The water to be heated enters the third economizer housing module, the second economizer housing module, the first economizer housing module, and the fourth economizer housing module for heating, and then enters the steam drum, and then enters the first evaporator housing module and the second evaporator housing module for heating.
[0006] The water-cooled wall flue includes a flue gas inlet, an ascending section empty flue, a descending section flue, and a dilution tube flue for easy flue gas reversal. The flue gas inlet is located at the lower part of the ascending section empty flue. The ascending section empty flue and the descending section flue are connected through the dilution tube flue. The evaporator tube panel and the superheater tube panel are located on the descending section flue. The evaporator tube panel includes a first evaporator tube panel and a second evaporator tube panel. The superheater tube panel includes a first superheater tube panel and a second superheater tube panel. The steam drum is connected to the first evaporator tube panel and the second evaporator tube panel respectively through steam-water pipes. The steam drum is also connected to the first superheater tube panel and the second superheater tube panel respectively through steam-water pipes. The first superheater tube panel and the second superheater tube panel send superheated steam to the turbine-generator for power generation.
[0007] Both the water-cooled wall flue and the liner flue are equipped with ash discharge ports. The ash discharge ports include a first ash discharge port, a second ash discharge port, a third ash discharge port, and a fourth ash discharge port. The first ash discharge port is located at the bottom of the rising section of the empty flue, the second ash discharge port is located at the bottom of the descending section of the flue, the third ash discharge port is located at the bottom of the denitrification return flue, and the fourth ash discharge port is located at the bottom of the outlet flue. Since the flue gas contains a large amount of dust, after the flue gas supplies heat to the economizer housing module, evaporator housing module, evaporator tube panel, and superheater tube panel, the temperature of the flue gas drops. At the same time, the dust in the flue gas will fall into the first ash discharge port, the second ash discharge port, the third ash discharge port, and the fourth ash discharge port for accumulation.
[0008] The duct also includes a connecting duct. The denitrification outlet duct and the denitrification return duct are connected through the connecting duct. An isolation valve is installed on the connecting duct. The isolation valve is normally closed. When the flue gas purification equipment is abnormal, the isolation valve is opened, so that the flue gas flows through the denitrification outlet duct and the connecting duct in sequence into the denitrification return duct. Even if the flue gas purification equipment is abnormal, it will not affect the normal operation of the waste heat boiler.
[0009] The water-cooled wall flue and the liner flue are connected to form an M-shaped structure. The water-cooled wall flue is a membrane wall structure, which can effectively adapt to the high-temperature waste heat utilization of pure oxygen combustion at 1000℃. The liner flue is a steel liner structure, which is quick to install.
[0010] The beneficial effects of this utility model are:
[0011] 1. This utility model utilizes the high-temperature waste heat flue gas generated by the glass kiln to continuously heat water, generating superheated steam at a certain temperature and pressure, which is then sent to a steam turbine to generate electricity.
[0012] 2. The waste heat boiler and flue gas purification equipment of this utility model operate independently. When the flue gas purification equipment malfunctions, the isolation valve is opened, so that the flue gas flows through the denitrification outlet flue and the connecting flue into the denitrification return flue in sequence. Even if the flue gas purification equipment malfunctions, it will not hinder the normal operation of the waste heat boiler.
[0013] 3. The structure of this utility model adopts an M-shaped arrangement. The first two channels are membrane wall structures, which can effectively adapt to the high-temperature waste heat utilization of pure oxygen combustion at 1000℃; the last two channels adopt steel guard plate modular structures, which are quick to install. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a structural schematic diagram of the water-cooled wall flue and the liner flue.
[0016] Figure 3 This is a schematic diagram of the steam drum structure;
[0017] In the diagram: 1-Flue gas inlet, 2-Rising section empty flue, 3-Flue descending section, 4-Denitrification outlet flue, 5-Denitrification return flue, 6-Diverting flue, 7-Outlet flue, 8-Economizer housing module, 9-Evaporator housing module, 10-Evaporator tube panel, 11-Superheater tube panel, 12-Steam drum, 13-Diluted tube flue window, 14-Connecting flue, 15-Isolation valve. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0020] In the first embodiment of this application:
[0021] like Figures 1 to 3 As shown, a waste heat boiler suitable for pure oxygen-assisted combustion glass kilns is disclosed. The waste heat boiler includes a water-cooled wall flue, a protective plate flue, and a steam drum 12. The water-cooled wall flue is connected to the protective plate flue. The water-cooled wall flue is equipped with an evaporator tube panel 10 and a superheater tube panel 11. The protective plate flue is equipped with an economizer housing module 8 and an evaporator housing module 9. The economizer housing module 8 is connected to the steam drum 12 via steam and water pipes. The steam drum 12 is connected to the evaporator tube panel 10, the evaporator housing module 9, and the superheater tube panel 11 via steam and water pipes.
[0022] The water-cooled wall flue includes a flue gas inlet 1, an ascending section empty flue 2, a descending section flue 3, and a dilution tube flue 13 for facilitating flue gas reversal. The flue gas inlet 1 is located at the lower part of the ascending section empty flue 2. The ascending section empty flue 2 and the descending section flue 3 are connected through the dilution tube flue 13. The evaporator tube panel 10 and the superheater tube panel 11 are installed on the descending section flue 3.
[0023] Evaporator tube panel 10 includes a first evaporator tube panel and a second evaporator tube panel, and superheater tube panel 11 includes a first superheater tube panel and a second superheater tube panel.
[0024] The flue includes a denitrification outlet flue 4, a denitrification return flue 5, a turning flue 6, and an outlet flue 7. The denitrification outlet flue 4 is connected to the descending section flue 3. The lower part of the denitrification outlet flue 4 is provided with a denitrification outlet. The lower part of the denitrification return flue 5 is provided with a denitrification inlet. The denitrification outlet and the denitrification inlet are respectively connected to the flue gas purification equipment. The denitrification return flue 5 is connected to the outlet flue 7 through the turning flue 6. The lower part of the outlet flue 7 is provided with a flue gas outlet. The economizer box module 8 and the evaporator box module 9 are installed on the denitrification return flue 5 and the outlet flue 7.
[0025] Economizer housing module 8 includes a first economizer housing module, a second economizer housing module, a third economizer housing module, and a fourth economizer housing module. Evaporator housing module 9 includes a first evaporator housing module and a second evaporator housing module. The fourth economizer housing module, the first evaporator housing module, and the second evaporator housing module are installed on the denitrification return flue 5. The first economizer housing module, the second economizer housing module, and the third economizer housing module are installed on the outlet flue 7. The high-temperature waste heat flue gas generated by the glass kiln enters through flue gas inlet 1, rises along the rising section of the open flue duct 2, and turns at the condensate tube vent 13 before entering the descending section of the flue duct 3. This provides heat to the evaporator tube panel 10 and superheater tube panel 11 within the descending section of the flue duct 3. After providing heat, the flue gas temperature drops to approximately 360℃. It then passes through the denitrification outlet flue 4 and the denitrification outlet before leaving the waste heat boiler and heading to the flue gas purification equipment. The purified flue gas then passes through the denitrification inlet and the denitrification return flue 5, returning to the waste heat boiler. It then turns again at the turning flue duct 6, providing heat to the economizer housing module 8 and evaporator housing module 9 within the denitrification return flue duct 5 and the outlet flue duct 7. Finally, it leaves the waste heat boiler through the outlet flue duct 7. The water requiring heating first enters the economizer housing module 8, absorbing the heat provided by the flue gas. The water is heated to hot water, which is then sent to the steam drum 12 through steam-water pipes. The hot water in the steam drum 12 enters the evaporator housing module 9 and evaporator tube panel 10 through steam-water pipes for a second heating to produce a saturated steam-water mixture. The steam-water mixture enters the steam drum 12, and the saturated steam is sent to the superheater tube panel 11 for a third heating to produce superheated steam at a certain temperature and pressure, which is then sent to the turbine-generator to generate electricity. Meanwhile, the saturated water in the steam drum 12 mixes with the second batch of hot water sent from the economizer housing module 8 and enters the evaporator housing module 9 and evaporator tube panel 10 again for heating to produce a second batch of saturated steam-water mixture. The second batch of saturated water enters the steam drum 12, and the second batch of saturated steam is sent to the superheater tube panel 11 for heating to produce superheated steam at a certain temperature and pressure, which is then sent to the turbine-generator to generate electricity, and so on. Meanwhile, depending on the needs, more evaporators can be installed inside the flue gas inlet 1, the rising section empty flue duct 2, and the falling section flue duct 3. These evaporators are connected to the steam drum 12 to heat the water in the steam-water pipeline, thereby expanding the evaporation heating surface and improving heating efficiency and flue gas heat utilization.
[0026] In the second embodiment of this application:
[0027] Based on the previous embodiment, this embodiment improves the protective plate flue, the denitrification outlet flue 4, and the denitrification return flue 5. The protective plate flue also includes a connecting flue 14. The denitrification outlet flue 4 and the denitrification return flue 5 are connected through the connecting flue 14. An isolation valve 15 is provided on the connecting flue 14. The isolation valve 15 is normally closed. When the flue gas purification equipment is abnormal, the valve is opened, so that the flue gas flows through the denitrification outlet flue 4 and the connecting flue 14 in sequence and enters the denitrification return flue 5. Even if the flue gas purification equipment is abnormal, it will not hinder the normal operation of the waste heat boiler.
[0028] In the third embodiment of this application:
[0029] Based on the first or second embodiment, this embodiment improves the water-cooled wall flue and the liner flue, both of which are equipped with ash discharge ports.
[0030] The ash discharge ports include a first ash discharge port, a second ash discharge port, a third ash discharge port, and a fourth ash discharge port. The first ash discharge port is located at the bottom of the rising section flue duct 2, the second ash discharge port is located at the bottom of the descending section flue duct 3, the third ash discharge port is located at the bottom of the denitrification return flue duct 5, and the fourth ash discharge port is located at the bottom of the outlet flue duct 7. Because the flue gas contains a large amount of dust, after the flue gas supplies heat to the economizer housing module, evaporator housing module, evaporator tube panel, and superheater tube panel, the temperature of the flue gas decreases. Simultaneously, the dust in the flue gas falls into the first, second, third, and fourth ash discharge ports and accumulates. A baffle that can be opened and closed can be installed at the bottom of each ash discharge port. When it is necessary to clean the accumulated dust, the baffle is opened, and the accumulated dust falls from the opening. When not cleaning, the baffle is closed, blocking the opening.
[0031] The water-cooled wall flue and the liner flue are connected in an M-shaped structure. The water-cooled wall flue is a membrane wall structure, which can effectively adapt to the high-temperature waste heat utilization of pure oxygen combustion at 1000℃. The liner flue is a steel liner structure, which is quick to install.
[0032] The above description is merely an embodiment of this utility model. It should be understood that this utility model is not limited to the form disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.
Claims
1. A waste heat boiler suitable for use in a pure oxygen fired glass furnace, characterized in that: The water-cooled wall flue, the baffle flue and the steam drum (12) are communicated, the water-cooled wall flue is provided with the evaporator tube screen (10) and the superheater tube screen (11), the baffle flue is provided with the economizer box module (8) and the evaporator box module (9), the economizer box module (8) is connected with the steam drum (12), and the steam drum (12) is connected with the evaporator tube screen (10), the evaporator box module (9) and the superheater tube screen (11) respectively.
2. A waste heat boiler suitable for use with a pure oxygen fired glass furnace as defined in claim 1, wherein: The water-cooled wall flue includes a flue gas inlet (1), an ascending section empty flue (2), a descending section flue (3) and a dilatation pipe smoke window (13) for facilitating flue gas diversion, the flue gas inlet (1) is arranged at the lower part of the ascending section empty flue (2), the ascending section empty flue (2) is communicated with the descending section flue (3) through the dilatation pipe smoke window (13), and the evaporator tube screen (10) and the superheater tube screen (11) are arranged on the descending section flue (3).
3. A waste heat boiler suitable for use with a pure oxygen fired glass furnace as defined in claim 2, wherein: The evaporator tube screen (10) includes a first evaporator tube screen and a second evaporator tube screen, and the superheater tube screen (11) includes a first superheater tube screen and a second superheater tube screen.
4. A waste heat boiler suitable for use with a pure oxygen fired glass furnace as defined in claim 2, wherein: The baffle flue includes a denitration leading-out flue (4), a denitration leading-back flue (5), a diversion flue (6) and an outlet flue (7), the denitration leading-out flue (4) is connected with the descending section flue (3), the lower part of the denitration leading-out flue (4) is provided with a denitration leading-out port, the lower part of the denitration leading-back flue (5) is provided with a denitration leading-in port, the denitration leading-out port and the denitration leading-in port are connected with flue gas purification equipment respectively, the denitration leading-back flue (5) is connected with the outlet flue (7) through the diversion flue (6), the lower part of the outlet flue (7) is provided with a flue gas outlet, and the economizer box module (8) and the evaporator box module (9) are arranged on the denitration leading-back flue (5) and the outlet flue (7).
5. A waste heat boiler suitable for use with a pure oxygen fired glass furnace as defined in claim 4, wherein: The water-cooled wall flue and the baffle flue are both provided with ash falling ports.
6. A waste heat boiler suitable for use with a pure oxygen fired glass furnace as defined in claim 5, wherein: The ash falling ports include a first ash falling port, a second ash falling port, a third ash falling port and a fourth ash falling port, the first ash falling port is arranged at the bottom of the ascending section empty flue (2), the second ash falling port is arranged at the bottom of the descending section flue (3), the third ash falling port is arranged at the bottom of the denitration leading-back flue (5), and the fourth ash falling port is arranged at the bottom of the outlet flue (7).
7. A waste heat boiler suitable for use with a pure oxygen fired glass furnace as defined in claim 4, wherein: The economizer box module (8) includes a first economizer box module, a second economizer box module, a third economizer box module and a fourth economizer box module, the evaporator box module (9) includes a first evaporator box module and a second evaporator box module, the fourth economizer box module, the first evaporator box module and the second evaporator box module are arranged on the denitration leading-back flue (5), and the first economizer box module, the second economizer box module and the third economizer box module are arranged on the outlet flue (7).
8. A waste heat boiler suitable for use with a pure oxygen fired glass furnace as defined in claim 4, wherein: The baffle flue further includes a connecting flue (14), the denitration leading-out flue (4) and the denitration leading-back flue (5) are communicated through the connecting flue (14), and the connecting flue (14) is provided with a cut-off valve (15).
9. A waste heat boiler suitable for use with a pure oxygen fired glass furnace as defined in claim 1, wherein: The water-cooled wall flue and the baffle flue are connected to form a M-shaped structure, the water-cooled wall flue is arranged as a membrane wall structure, and the baffle flue is arranged as a steel baffle structure.