A centralized integrated heat exchange unit, grate water cooling structure and incinerator

Abstract

The application relates to a centralized integrated heat exchange unit, a grate water cooling structure and an incinerator, the centralized integrated heat exchange unit being used for cooling a grate and an intermediate beam of the incinerator, comprising a support, further comprising a water-cooled heat exchanger; a grate water cooling water supply pump used for supplying cooling water to the grate; an intermediate beam water cooling water supply pump used for supplying cooling water to the intermediate beam; a grate cooling water return temperature three-way regulating valve connected with a water inlet end of the water-cooled heat exchanger, a water inlet end of the grate water cooling water supply pump and the grate respectively; an intermediate beam cooling water return temperature three-way regulating valve connected with a water inlet end of the water-cooled heat exchanger, a water inlet end of the intermediate beam water cooling water supply pump and the intermediate beam respectively; and a control cabinet. The centralized integration is realized, the layout occupies a small area, adjustment is flexible and convenient, the complexity of the system and the maintenance and repair difficulty are reduced, the modular degree is improved, and the integrated design degree of the core components is improved.

Description

Technical Field

[0001] This application relates to the technical field of incinerator grates, and in particular to a centralized integrated heat exchange unit, a grate-cooled structure, and an incinerator. Background Technology

[0002] The existing grate structure of incinerators includes a grate and a middle beam. During the use of the incinerator, the grate and the middle beam need to be cooled separately.

[0003] The existing boiler water cooling system is a distributed design, with pumps, heat exchangers, regulating, controlling and cooling components arranged and operating independently. It occupies a large area, has complex regulation and control, poor coordination and uniformity, poor modularity and adaptability, and is not conducive to operation, maintenance, repair and general use. Utility Model Content

[0004] To address the shortcomings of the aforementioned technologies, this application provides a centralized integrated heat exchange unit, a boiler water cooling structure, and an incinerator. Cooling is achieved through a closed-loop circulation system, where the heat from the grate and intermediate beams is carried away by the closed-loop water circulation, ensuring that the grate and intermediate beams remain within a safe temperature range. The heated cooling water is cooled by an air preheater or a wet-cooled heat exchanger, and the cooled closed-loop water continues to cool the grate and intermediate beams. When the incinerator load fluctuates or the grate heat load changes, the water flow to the grate and intermediate beams is adjusted by regulating the return water three-way valve at the pump inlet to maintain the temperature of the grate and intermediate beams above a safe level. The entire system achieves constant pressure and stable flow of the cooling water system through the installation of a pressure stabilizing tank.

[0005] Specifically, this application provides a centralized integrated heat exchange unit for cooling the grate and intermediate beam of an incinerator, including a support frame, and further comprising:

[0006] A water-cooled heat exchanger is mounted on the bracket.

[0007] A furnace drain water cooling water supply pump is mounted on the bracket, and the inlet end of the furnace drain water cooling water supply pump is connected to the outlet end of the water-cooled heat exchanger; the outlet end of the furnace drain water cooling water supply pump is used to supply cooling water to the grate.

[0008] A water-cooled water supply pump for the intermediate beam is mounted on the support. The inlet of the water-cooled water supply pump is connected to the outlet of the water-cooled heat exchanger and is connected in parallel with the boiler water cooling water supply pump. The outlet of the water-cooled water supply pump for the intermediate beam is used to supply cooling water to the intermediate beam.

[0009] A three-way regulating valve for the return water temperature of the grate is connected to the inlet of the water-cooled heat exchanger, the inlet of the grate water cooling supply pump, and the grate, respectively.

[0010] A three-way regulating valve for the cooling water return temperature of the intermediate beam is connected to the inlet of the water-cooled heat exchanger, the inlet of the water-cooled water supply pump of the intermediate beam, and the intermediate beam, respectively; and

[0011] The control cabinet is mounted on the bracket and is coupled to the furnace drain water cooling supply pump, the intermediate beam water cooling supply pump, the grate cooling water return water temperature three-way regulating valve, and the intermediate beam cooling water return water temperature three-way regulating valve.

[0012] As a preferred embodiment, a return water three-way regulating valve is provided, wherein the first end of the return water three-way regulating valve is connected to the grate cooling water return water temperature regulating valve and the intermediate beam cooling water return water temperature regulating valve, the second end of the return water three-way regulating valve is connected to the water inlet of the water-cooled heat exchanger, and the third end of the return water three-way regulating valve is used to connect to the air preheater; the air preheater and the water-cooled heat exchanger are connected in parallel.

[0013] As a preferred embodiment, one end of the buffer tank is connected to the outlet end of the water-cooled heat exchanger;

[0014] A pressure stabilizing tank is connected to the other end of the buffer tank; and

[0015] A drain valve is installed between the buffer tank and the pressure stabilizing tank.

[0016] As a preferred option, the water supply electric valve is connected at one end to an external water source and at the other end to the outlet of the water-cooled heat exchanger.

[0017] As a preferred embodiment, the water supply electric valve is connected in parallel with a backup switching valve.

[0018] As a preferred embodiment, the inlet end of the return water three-way regulating valve, the outlet end of the furnace drainage cold water supply pump, and the outlet end of the intermediate beam water-cooled water supply pump are all equipped with temperature and pressure measuring points, and the temperature and pressure measuring points are all coupled to the control cabinet.

[0019] As a preferred embodiment, the water-cooled heat exchanger includes two water-cooled heat exchangers arranged in parallel; the boiler drain water supply pump includes two boiler drain water supply pumps arranged in an interlocked manner; and the intermediate beam water-cooled water supply pump includes two intermediate beam water-cooled water supply pumps arranged in an interlocked manner.

[0020] In addition, this application also provides a furnace water cooling structure, including a grate and an intermediate beam, and also includes a centralized integrated heat exchange unit as described above, wherein the centralized integrated heat exchange unit is used to water cool the grate and the intermediate beam.

[0021] As a preferred embodiment, the grate includes a grate shaft and a protective plate assembly, and the intermediate beam includes a cover plate and a T-shaped plate assembly; each of the cooling water branches of the grate shaft, the protective plate assembly, the cover plate, and the T-shaped plate assembly is equipped with a control valve, which is used to regulate the amount of water entering the grate shaft, the protective plate assembly, the cover plate, and the T-shaped plate assembly; each of the cooling water branches of the grate shaft, the protective plate assembly, the cover plate, and the T-shaped plate assembly is equipped with a safety valve, which is used to release pressure when the pressure of the cooling water branch exceeds the safety pressure.

[0022] In addition, this application also provides an incinerator, characterized by including the furnace water cooling structure as described above.

[0023] Compared with the prior art, this application has the following beneficial effects:

[0024] It reduces the footprint and complexity of the boiler water cooling system, improves the coordination and uniformity of pumps, heat exchangers and related components, enhances the integration and modularity of the core water cooling components, and improves the versatility of the core boiler water cooling components.

[0025] The configuration requirements of this application are simple, the equipment layout occupies a small area, and the adjustment is flexible and convenient, reducing the complexity of the system. When the air preheater is put into use, the closed-loop water flows to the air preheater through a three-way valve to control and regulate the water volume, and then returns to the grate and grate intermediate beam system.

[0026] The two boiler grate cooling water supply pumps are interlocked. If one pump fails or stops, the other pump will automatically start to maintain the normal flow of grate cooling water. The two intermediate beam water cooling water supply pumps are also interlocked. If one pump fails or stops, the other pump will automatically start to maintain the normal flow of grate cooling water. The water-cooled heat exchanger is equipped with two 100% capacity heat exchangers for easy maintenance.

[0027] Each grate shaft and protective plate assembly cooling water branch is equipped with a control valve to regulate the water flow into each grate shaft and protective plate to achieve an optimal combination. Similarly, the cover plates and T-shaped plate assemblies of the intermediate beams are equipped with control valves to regulate the water flow into each cover plate and T-shaped plate to achieve an optimal combination. Safety valves are installed at the cooling water inlets of the grate shaft and protective plate assemblies, the intermediate beam cover plates and T-shaped plate assemblies, or the cooling water inlets of the cooling components. When the pressure exceeds the safety pressure, the safety valves activate to protect the components from damage. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0030] Figure 1 This is a schematic diagram of the overall structure of the centralized integrated heat exchanger unit in the embodiments of this application. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0032] In the description of this application, it should be understood that the orientations or positional relationships indicated by terms, etc., are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device, element, module, system, platform, or device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The following description of this application is only to be understood as a description of individual embodiments of the technical solutions of this application. Other embodiments are not reflected in the following description, but this does not mean that this application excludes these other embodiments, nor is the technical solution of this application limited to the specific implementations described below, and the protection scope of this application is not limited to the specific implementations described below. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this application.

[0033] It should be noted that if the terms "first," "second," etc., appear in the specification, claims, and accompanying drawings of this application, such descriptions are only used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a system, product, or device that comprises a series of units, modules, or components is not necessarily limited to those explicitly listed, but may include other components not explicitly listed or inherent to such systems, products, or devices.

[0034] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] In some embodiments, such as Figure 1 As shown, this application provides a centralized integrated heat exchange unit 00 for cooling the grate 7 and intermediate beam 11 of an incinerator. It includes a support 01, a water-cooled heat exchanger 02, a grate water cooling supply pump 03, and an intermediate beam water cooling supply pump 04.

[0036] A water-cooled heat exchanger 02 is mounted on the support 01; a boiler drain water cooling pump 03 is mounted on the support 01, with its inlet connected to the outlet of the water-cooled heat exchanger 02; the outlet of the boiler drain water cooling pump 03 is used to supply cooling water to the grate; a middle beam water-cooled water pump 04 is mounted on the support 01, with its inlet connected to the outlet of the water-cooled heat exchanger 02 and in parallel with the boiler drain water cooling pump 03; the outlet of the middle beam water-cooled water pump 04 is used to supply cooling water to the middle beam 11.

[0037] The centralized integrated heat exchange unit 00 is also equipped with a three-way regulating valve 8 for the return water temperature of the grate cooling water. The three-way regulating valve 8 is connected to the water inlet of the water-cooled heat exchanger 02, the water inlet of the grate water cooling supply pump 03, and the grate 7, respectively.

[0038] The centralized integrated heat exchange unit 00 is also equipped with a three-way regulating valve 12 for the return water temperature of the intermediate beam cooling water. The three-way regulating valve 12 is connected to the water inlet of the water-cooled heat exchanger 02, the water inlet of the intermediate beam water-cooled water supply pump 04, and the intermediate beam 11, respectively.

[0039] The centralized integrated heat exchanger unit 00 is also equipped with a control cabinet 16, which is mounted on the bracket 01. The control cabinet 16 is coupled to the boiler drain water cooling supply pump 03, the intermediate beam water cooling supply pump 04, the grate cooling water return temperature three-way regulating valve 8, and the intermediate beam cooling water return temperature three-way regulating valve 12. The control cabinet 16 controls and adjusts the grate cooling water inlet temperature by controlling the grate cooling water return temperature three-way regulating valve 8; the control cabinet 16 controls and adjusts the intermediate beam cooling water inlet temperature by controlling the intermediate beam cooling water return temperature three-way regulating valve 12.

[0040] In some embodiments, the centralized integrated heat exchanger unit 00 is further provided with a return water three-way regulating valve 1. The first end of the return water three-way regulating valve 1 is connected to the grate cooling water return water temperature three-way regulating valve 8 and the intermediate beam cooling water return water temperature three-way regulating valve 12. The second end of the return water three-way regulating valve 1 is connected to the water inlet end of the water-cooled heat exchanger 02. The third end of the return water three-way regulating valve 1 is used to connect to the air preheater 4. The air preheater 4 and the water-cooled heat exchanger 02 are connected in parallel. By controlling the return water three-way regulating valve 1, the water flow distribution into the air preheater 4 and the water-cooled heat exchanger 02 can be controlled and adjusted.

[0041] In some embodiments, the centralized integrated heat exchanger unit 00 is further provided with a pressure stabilizing system, including a buffer tank 14, a pressure stabilizing tank 13, and a drain valve 18. One end of the buffer tank 14 is connected to the outlet of the water-cooled heat exchanger 02; the pressure stabilizing tank 13 is connected to the other end of the buffer tank 14; the drain valve 18 is disposed between the buffer tank 14 and the pressure stabilizing tank 13; and the pressure stabilizing tank 13 is equipped with a nitrogen purging valve. The buffer tank 14 and the pressure stabilizing tank 13 are conventional structures in the art and do not constitute an invention of this application. The innovation of this application lies in incorporating both into the heat exchanger unit and providing the drain valve 18.

[0042] In some embodiments, the centralized integrated heat exchanger unit 00 is further provided with a water supply system, including a water supply electric valve 15. One end of the water supply electric valve 15 is connected to an external water source, and the other end of the water supply electric valve 15 is connected to the outlet end of the water-cooled heat exchanger 02. A spare switch valve 17 is connected in parallel with the water supply electric valve 14. The water supply electric valve 15 is controlled to supply water to the entire water-cooling system to achieve a reasonable pressure.

[0043] In some embodiments, the inlet end of the return water three-way regulating valve 1, the outlet end of the furnace drainage cold water supply pump 03, and the outlet end of the intermediate beam water-cooled water supply pump 04 are all equipped with temperature and pressure measuring points, and the temperature and pressure measuring points are all coupled to the control cabinet 16.

[0044] In some embodiments, the water-cooled heat exchanger 02 includes two water-cooled heat exchangers 2 and 3 arranged in parallel; the boiler drain water cooling supply pump includes two boiler drain water cooling supply pumps 5 and 6 arranged in an interlocked manner; the intermediate beam water cooling supply pump includes two intermediate beam water cooling supply pumps 9 and 10 arranged in an interlocked manner. The water-cooled heat exchanger 02 is equipped with two 100% capacity heat exchangers for easy maintenance; the control cabinet 16 maintains the continuous and stable flow of the grate cooling water circuit by controlling the start and stop of the two boiler drain water cooling supply pumps 5 and 6; the control cabinet 16 maintains the continuous and stable flow of the intermediate beam cooling water circuit by controlling the start and stop of the two intermediate beam water cooling supply pumps 9 and 10.

[0045] All the above components, along with their connecting pipes and accessories such as valves, measuring points, and meters on the pipes, are skid-mounted together on bracket 01, forming a centralized integrated heat exchange unit 00.

[0046] In some embodiments, this application also provides a water cooling structure for an incinerator, including a grate 7 and an intermediate beam 11, and further including a centralized integrated heat exchange unit 00 as described above, the centralized integrated heat exchange unit 00 being used to water cool the grate 7 and the intermediate beam 11.

[0047] In some embodiments, the grate 7 includes a grate shaft and a protective plate assembly, and the intermediate beam includes a cover plate and a T-shaped plate assembly; the cooling water branches of the grate shaft, the protective plate assembly, the cover plate, and the T-shaped plate assembly are all equipped with control valves, which are used to regulate the amount of water entering the grate shaft, the protective plate assembly, the cover plate, and the T-shaped plate assembly; safety valves are all installed at the inlet of the cooling water branches of the grate shaft, the protective plate assembly, the cover plate, and the T-shaped plate assembly, and the safety valves are used to release pressure when the pressure of the cooling water branch exceeds the safety pressure.

[0048] In some embodiments, this application also provides an incinerator characterized by including a furnace water cooling structure as described above.

[0049] This application includes a middle beam, grate, pressure stabilizing system, water supply system, and supporting pipe and valve system. The grate cooling adopts a closed-loop circulation method, using the closed-loop water circulation to remove heat from the grate and middle beam, ensuring they remain within a safe temperature range. The heated cooling water is cooled by an air preheater or water-cooled heat exchanger, and the cooled water continues to cool the grate and middle beam. When the incinerator load fluctuates or the grate heat load changes, the water flow to the grate and middle beam is adjusted by regulating the return water three-way valve at the pump inlet to maintain the grate temperature above a safe level. The entire system achieves constant pressure and stable flow of the cooling water system through a pressure stabilizing tank. This water-cooled grate system has a small footprint, is flexible and convenient to adjust, reduces system complexity and maintenance difficulty, improves modularity, and enhances the integrated design of core components.

[0050] When the air preheater is put into operation, the water flow to the air preheater is controlled and regulated by a three-way valve. The incinerator in this application uses closed-loop circulating water as the cooling medium to achieve stable circulating cooling at a constant flow rate. The circulation components include a water pump, intermediate beam, grate, isolation valve, regulating valve, heat exchanger, and corresponding piping system. When the incinerator load changes and the grate heat load fluctuates, the water flow to the grate and intermediate beam is adjusted by regulating the three-way valve to maintain the grate temperature above a safe level.

[0051] The water pumps, heat exchangers, water supply systems, and pressure stabilizing systems required for closed-loop cooling water flow and cooling are centrally skid-mounted, reducing the floor space required.

[0052] The integrated control cabinet allows for centralized control and adjustment of the entire furnace water cooling system, reducing the complexity of system control and adjustment.

[0053] The integrated heat exchanger unit is skid-mounted and equipped with a control cabinet and corresponding measuring points, making it applicable to similar incinerators and increasing the degree of modular design and versatility.

[0054] The water flow to the air preheater and water-cooled heat exchanger can be adjusted, which improves the overall heat utilization rate of the plant.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-described embodiments are merely illustrative of several implementation methods of this application and are only used to illustrate the technical solutions of this application, not to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application. For those skilled in the art, several variations and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application.

Claims

1. A centralized integrated heat exchange unit for cooling the grate and intermediate beams of an incinerator, comprising a support frame, characterized in that, Also includes: A water-cooled heat exchanger is mounted on the bracket. A furnace drain water cooling water supply pump is mounted on the bracket, and the inlet end of the furnace drain water cooling water supply pump is connected to the outlet end of the water-cooled heat exchanger; the outlet end of the furnace drain water cooling water supply pump is used to supply cooling water to the grate. A water-cooled water supply pump for the intermediate beam is mounted on the support. The inlet of the water-cooled water supply pump is connected to the outlet of the water-cooled heat exchanger and is connected in parallel with the boiler water cooling water supply pump. The outlet of the water-cooled water supply pump for the intermediate beam is used to supply cooling water to the intermediate beam. A three-way regulating valve for the return water temperature of the grate is connected to the inlet of the water-cooled heat exchanger, the inlet of the grate water cooling supply pump, and the grate, respectively. The intermediate beam cooling water return temperature three-way regulating valve is connected to the water inlet of the water-cooled heat exchanger, the water inlet of the intermediate beam water-cooled water supply pump, and the intermediate beam, respectively. as well as The control cabinet is mounted on the bracket and is coupled to the furnace drain water cooling supply pump, the intermediate beam water cooling supply pump, the grate cooling water return water temperature three-way regulating valve, and the intermediate beam cooling water return water temperature three-way regulating valve.

2. The centralized integrated heat exchange unit according to claim 1, characterized in that, Also includes: A return water three-way regulating valve is provided, with its first end connected to the grate cooling water return water temperature regulating valve and the intermediate beam cooling water return water temperature regulating valve, its second end connected to the water inlet of the water-cooled heat exchanger, and its third end connected to the air preheater; the air preheater and the water-cooled heat exchanger are connected in parallel.

3. The centralized integrated heat exchange unit according to claim 2, characterized in that, Also includes: A buffer tank, one end of which is connected to the outlet of the water-cooled heat exchanger; A pressure stabilizing tank is connected to the other end of the buffer tank; as well as A drain valve is installed between the buffer tank and the pressure stabilizing tank.

4. The centralized integrated heat exchange unit according to claim 3, characterized in that, Also includes: The water supply electric valve is connected at one end to an external water source and at the other end to the outlet of the water-cooled heat exchanger.

5. The centralized integrated heat exchanger unit according to claim 4, characterized in that: The water supply electric valve is connected in parallel with a backup switch valve.

6. The centralized integrated heat exchanger unit according to claim 4, characterized in that: Temperature and pressure measuring points are located at the inlet of the return water three-way regulating valve, the outlet of the furnace drainage cold water supply pump, and the outlet of the intermediate beam water-cooled water supply pump. All temperature and pressure measuring points are coupled to the control cabinet.

7. The centralized integrated heat exchange unit according to claim 6, characterized in that: The water-cooled heat exchanger includes two water-cooled heat exchangers arranged in parallel; the boiler drain water supply pump includes two boiler drain water supply pumps arranged in an interlocked manner; the intermediate beam water-cooled water supply pump includes two intermediate beam water-cooled water supply pumps arranged in an interlocked manner.

8. A grate-cooled structure, comprising a grate and an intermediate beam, characterized in that... It also includes a centralized integrated heat exchange unit as described in any one of claims 1-7, wherein the centralized integrated heat exchange unit is used for water cooling of the grate and intermediate beam.

9. The furnace water cooling structure according to claim 8, characterized in that: The grate includes a grate shaft and a protective plate assembly, and the intermediate beam includes a cover plate and a T-shaped plate assembly. Control valves are installed in the cooling water branches of the grate shaft, the protective plate assembly, the cover plate, and the T-shaped plate assembly. These control valves are used to regulate the amount of water entering the grate shaft, the protective plate assembly, the cover plate, and the T-shaped plate assembly. Safety valves are installed at the inlets of the cooling water branches of the grate shaft, the protective plate assembly, the cover plate, and the T-shaped plate assembly. When the pressure in the cooling water branch exceeds the safety pressure, the safety valves are used to release pressure.

10. An incinerator, characterized in that... Includes the furnace water cooling structure as described in claim 8 or 9.

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