Safe low-carbon heat source supply equipment for cement industry

Abstract

The utility model relates to safe low-carbon heat source supply equipment for the cement industry. The safe low-carbon heat source supply equipment for the cement industry comprises a hot-blast stove, a ventilation fire bar, a stove bottom blast system and an automatic ash discharging and cooling system. Biomass feeding holes are formed in the side face of the hot-blast stove, a stove body of the hot-blast stove is of a cylindrical structure, the top of the hot-blast stove is an inverted-cone-shaped stove top, the inverted-cone-shaped stove top is connected with the cement industrial decomposing furnace through a stove body cone air pipe, and ventilation fire bars are installed at the bottom of the hot-blast stove and communicated with a stove bottom air blowing system. The bottom of the hot-blast stove is connected with an automatic ash-discharging cooling system, and the ventilation grate bars are located on the upper portion of the automatic ash-discharging cooling system. The hot-blast stove is connected with the decomposing furnace through the conical air pipe of the furnace body, the negative pressure of the decomposing furnace in the cement industry is fully utilized, the combustion efficiency and the heat utilization rate of biomass fuel are improved, a local oxygen-poor environment can be prevented from being generated in heat source equipment through the ventilation fire bars with the air volume adjusting function, and the burn-off rate of the biomass fuel is further increased.

Description

Technical Field

[0001] This application relates to the technical fields of work safety and low-carbon environmental protection, and particularly relates to a safe and low-carbon heat source supply device for the cement industry. Background Art

[0002] In related technologies, the low-carbon technologies in the cement industry mainly focus on the use of alternative fuels, but the technologies for applying new equipment and new processes are not mature. On the one hand, it is manifested as unstable heat source supply and low heat substitution rate. On the other hand, the inherent safety level of new equipment and new processes is relatively low, and the work safety risks are relatively high during the application process. Summary of the Utility Model

[0003] To solve or partially solve the problems existing in related technologies, this application provides a safe and low-carbon heat source supply device for the cement industry, which can stably supply heat source for cement clinker production and is safe and stable.

[0004] This application provides a safe and low-carbon heat source supply device for the cement industry, including a hot blast stove 3, a ventilation grate 8, a bottom air-blowing system, and an automatic ash-discharging and cooling system; a biomass feeding hole 6 is arranged on the side of the hot blast stove 3, the furnace body of the hot blast stove 3 is of a cylindrical structure, the top is an inverted conical furnace top 2, and the inverted conical furnace top 2 is connected to a cement industry decomposition furnace through a furnace body conical part air duct 1. The bottom of the hot blast stove 3 is provided with a ventilation grate 8, a bottom air-blowing system is communicated with the ventilation grate 8, the bottom of the hot blast stove 3 is connected with an automatic ash-discharging and cooling system, and the ventilation grate 8 is located above the automatic ash-discharging and cooling system.

[0005] Optionally, in some solutions, the biomass feeding hole 6 is provided with a double gate of a manual gate 4 and an automatic gate 5, and the automatic gate 5 is positively interlocked with the furnace body conical part air duct 1.

[0006] Optionally, in some solutions, the height ratio of the inverted conical furnace top 2 to the furnace body of the hot blast stove 3 is 1:1 to 1:2.5.

[0007] Optionally, in some solutions, the ventilation grate 8 includes an H-shaped heat-resistant support mechanism 7 and a grate ventilation pipe 10. The grate ventilation pipe 10 is arranged on both sides of the H-shaped heat-resistant support mechanism 7, and ventilation holes 9 are opened on the grate ventilation pipe 10.

[0008] Optionally, in some solutions, the air outlet direction of the ventilation holes 9 is 30° to 60° obliquely upward.

[0009] Optionally, in some solutions, the bottom air-blowing system includes a blower 12. The blower 12 is positively interlocked with the furnace body conical part air duct 1. The blower 12 is communicated with the grate ventilation pipe 10 through a air supply pipeline, and an air volume regulating valve 11 is arranged on the air supply pipeline.

[0010] Optionally, in some solutions, the automatic ash discharging and cooling system includes a forward and reverse motor 14, a spiral reamer mechanism 15, an ash receiving plate 16, and a cooling spray pipe 13. The ash receiving plate 16 is rotatably installed at the bottom of the hot blast stove 3, and its installation rotating shaft is connected to the rotating shaft of the forward and reverse motor 14. A spiral reamer mechanism 15 is connected to the lower side of the ash receiving plate 16. The cooling spray pipes 13 are arranged on both sides inside the spiral reamer mechanism 15, and nozzles 17 are evenly arranged thereon. A dust collecting device is arranged at the end of the spiral reamer mechanism 15.

[0011] The technical solutions provided in this application may include the following beneficial effects:

[0012] In this application, the hot blast stove is connected to the decomposition furnace through the air duct at the conical part of the furnace body, making full use of the negative pressure of the decomposition furnace in the cement industry. On the one hand, it can improve the combustion efficiency of biomass fuel, and on the other hand, it can improve the heat utilization rate. At the same time, by using the ventilation grate with the function of air volume regulation, it is possible to prevent the generation of a locally oxygen-deficient environment inside the heat source equipment, further improving the burnout rate of biomass fuel;

[0013] The automatic gate of the feeding port and the blower are both interlocked with the pressure value at the connection between the inverted conical furnace top and the air duct at the conical part of the furnace body. When the system is under positive pressure, the blower and the feeding port gate are interlocked to trip and close, comprehensively preventing the harm caused by equipment positive pressure to external operators.

[0014] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By describing the exemplary embodiments of this application in more detail in combination with the drawings, the above and other objects, features, and advantages of this application will become more obvious. Among them, in the exemplary embodiments of this application, the same reference numerals generally represent the same components.

[0016] Figure 1 is a schematic structural diagram of a safe and low-carbon heat source supply device for the cement industry shown in the embodiments of this application;

[0017] Figure 2 is the ventilation grate shown in the embodiments of this application.

[0018] REFERENCE NUMERALS:

[0019] 1 - air duct at the conical part of the furnace body, 2 - inverted conical furnace top, 3 - hot blast stove, 4 - manual gate, 5 - automatic gate, 6 - biomass feeding hole, 7 - H-shaped heat-resistant support mechanism, 8 - ventilation grate, 9 - ventilation hole, 10 - furnace grate ventilation pipe, 11 - air volume regulating valve, 12 - blower, 13 - cooling spray pipe, 14 - forward and reverse motor, 15 - spiral reamer mechanism, 16 - ash receiving plate, 17 - nozzle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0021] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0022] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0023] Unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0024] In view of the above problems, an embodiment of the present application provides a safe and low-carbon heat source supply device for the cement industry, which can stably supply heat sources for cement clinker production and is safe and stable.

[0025] The technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0026] See Figure 1, the described cement industry safety and low-carbon heat source supply equipment includes a hot blast stove 3, a ventilation grate 8, a bottom air-blowing system, and an automatic ash discharging and cooling system; a biomass feeding hole 6 is provided on the side of the hot blast stove 3. The furnace body of the hot blast stove 3 is of a cylindrical structure, and the top is an inverted conical furnace top 2. The height ratio of the inverted conical furnace top 2 to the furnace body of the hot blast stove 3 is 1:1 to 1:2.5. The inverted conical furnace top 2 is connected to the cement industry decomposition furnace through a furnace body conical air duct 1. A ventilation grate 8 is installed at the bottom of the hot blast stove 3. A bottom air-blowing system is connected to the ventilation grate 8. The bottom of the hot blast stove 3 is connected to an automatic ash discharging and cooling system, and the ventilation grate 8 is located above the automatic ash discharging and cooling system.

[0027] During operation, the inverted conical furnace top 2 is connected to the cement industry decomposition furnace through the furnace body conical air duct 1, making full use of the negative pressure of the cement industry decomposition furnace. The amount of heat supply mainly depends on the magnitude of the negative pressure of the cement industry decomposition furnace. The greater the negative pressure, the higher the heat utilization rate. On the one hand, it can improve the combustion efficiency of biomass fuel, and on the other hand, it can improve the heat utilization rate. By using the ventilation grate 8 with an air volume adjustment function, the bottom air-blowing system is connected to the ventilation grate 8 to supply air to the ventilation grate 8, which can prevent the generation of a locally oxygen-deficient environment inside the heat source equipment and further improve the burnout rate of biomass fuel. The automatic ash discharging and cooling system realizes simultaneous ash discharging and cooling.

[0028] The whole equipment uses a cylindrical hot blast stove 3 connected to an inverted conical furnace top 2. The furnace lining is made of refractory material by casting. Through the design of the cylindrical hot blast stove 3 and the inverted conical furnace top 2, the heat loss rate can be effectively reduced.

[0029] In some embodiments, the biomass feeding hole 6 is provided with a double gate, namely a manual gate 4 and an automatic gate 5, and the automatic gate 5 is positively pressure interlocked with the furnace body conical air duct 1.

[0030] During operation, the biomass feeding hole 6 is provided with a double gate. Under normal use conditions, the manual gate 4 is remotely controlled to open and close by a winch through an operating handle. When the system has positive pressure, the automatic gate 5 is interlocked and automatically closed to prevent the hot air wave with positive pressure in the furnace from rushing out; the opening position of the biomass feeding port 6 is at a height from the furnace body base of the hot blast stove 3 that is 1 / 3 to 1 / 2 of the furnace body height of the hot blast stove 3. The biomass feeding port 6 is circularly arranged, and its diameter is 1 / 3 to 1 / 2 of the furnace body diameter of the hot blast stove 3.

[0031] In some embodiments, see Figure 2 , the described ventilation grate 8 includes an H-shaped heat-resistant support mechanism 7 and a grate ventilation pipe 10. The grate ventilation pipe 10 is arranged on both sides of the H-shaped heat-resistant support mechanism 7. Ventilation holes 9 are opened on the grate ventilation pipe 10, and the air outlet direction of the ventilation holes 9 is 30° to 60° obliquely upward.

[0032] During operation, 3 - 12 ventilation grate bars 8 are arranged. The grate ventilation pipes 10 are welded to both sides of the H - shaped heat - resistant support mechanism 7, and then the grate ventilation pipes 10 are wrapped inside the H - shaped heat - resistant support mechanism 7 by refractory castable. It is ensured that the air outlet direction of the ventilation holes 9 is 30° - 60° obliquely upward, and the air volume can be adjusted. This not only ensures the ventilation effect of the ventilation grate bars 8 but also ensures the high - temperature durability of the ventilation grate bars 8.

[0033] In some embodiments, the bottom air - blowing system of the furnace includes a blower 12. The blower 12 is positively pressure - interlocked with the furnace body conical part air duct 1. The blower 12 is connected to the grate ventilation pipe 10 through an air - supply pipeline, and an air volume regulating valve 11 is arranged on the air - supply pipeline.

[0034] During operation, the air volume of the ventilation grate bars 8 is controlled by the air volume regulating valve 11. The grate ventilation pipe 10 is connected to the blower 12, and the blower 12 is positively pressure - interlocked with the furnace body conical part air duct 1. When positive pressure appears in the system, the blower 12 automatically interlocks and trips, automatically cutting off the gas source.

[0035] The positive - pressure value for the operation of the positive - pressure interlock safety control system of the system is taken as the pressure value at the connection of the inverted - conical furnace top 2 and the furnace body conical part air duct 1. When positive pressure appears in the system, the automatic gate 5 and the furnace body blower 12 interlock and act, which can automatically close the feeding port gate and cut off the gas source of the blower 12 to prevent the hot wave of positive pressure in the furnace from rushing out.

[0036] In some embodiments, the automatic ash - discharging and cooling system includes a forward - reverse motor 14, a spiral reamer mechanism 15, an ash - receiving plate 16, and a cooling spray pipeline 13. The ash - receiving plate 16 is rotatably installed at the bottom of the hot - blast stove 3, and its installation rotating shaft is connected to the rotating shaft of the forward - reverse motor 14. A spiral reamer mechanism 15 is connected to the lower side of the ash - receiving plate 16. The cooling spray pipeline 13 is arranged on both sides inside the spiral reamer mechanism 15, and spray nozzles 17 are evenly arranged on it. A dust - collecting device is arranged at the end of the spiral reamer mechanism 15.

[0037] During operation, the forward - reverse motor 14 rotates to drive the ash - receiving plate 16 to rotate, bringing the ash into the spiral reamer mechanism 15 and then discharging the ash through the spiral reamer mechanism 15. Then, a transfer device is used to transfer and recycle it. The cooling spray pipeline 13 is arranged along both sides of the reamer of the spiral reamer mechanism 15, and the pressurized water spraying is interlocked with the automatic ash - discharging device and operates synchronously, enabling the ash - discharging and cooling to be carried out simultaneously. An automatic ash - discharging device at a fixed time is adopted to reduce the labor intensity of operating personnel and avoid the safety risk of scalding during the ash - cleaning operation of personnel.

[0038] This application can make full use of the negative - pressure effect of the existing production process in the cement industry, provide a stable and efficient heat source for the production of the cement industry, achieve the effect of replacing part of the fossil fuel and reducing coal consumption. At the same time, through multiple interlock protections, the safe and efficient operation of the whole system can be realized, and the safety risk of equipment operators can be reduced to a controllable range.

[0039] Finally, it should also be noted that in this text, relationships such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises", "comprising" or any other variation is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0040] The unit described as a separate component may or may not be physically separated, and the component shown as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0041] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the embodiments disclosed herein.

Claims

1. A safe low-carbon heat source supply equipment for cement industry, characterized by: The safe low-carbon heat source supply equipment for the cement industry comprises a hot blast furnace (3), ventilation grate bars (8), a furnace bottom blast system, and an automatic ash unloading and cooling system; a biomass feeding hole (6) is arranged on the side of the hot blast furnace (3); the furnace body of the hot blast furnace (3) is a cylindrical structure, and the top is an inverted conical furnace top (2); the inverted conical furnace top (2) is connected to the cement industry decomposition furnace through the furnace body cone air duct (1); a ventilation grate bar (8) is installed at the bottom of the hot blast furnace (3); the ventilation grate bar (8) is connected to the furnace bottom blast system; the bottom of the hot blast furnace (3) is connected to the automatic ash unloading and cooling system, and the ventilation grate bar (8) is located at the upper part of the automatic ash unloading and cooling system.

2. The safe low-carbon heat source supply equipment for cement industry according to claim 1 is characterized by: The biomass feeding hole (6) is provided with a double gate plate of a manual gate plate (4) and an automatic gate plate (5), and the automatic gate plate (5) is positively pressure-interlocked with the furnace body cone air duct (1).

3. The safe low-carbon heat source supply equipment for cement industry according to claim 1 or 2, characterized in that: The ratio of the inverted conical furnace top (2) to the furnace body height of the hot blast furnace (3) is 1:1 to 1:2.

5.

4. The safe low-carbon heat source supply equipment for cement industry according to claim 1 or 2, characterized in that: The ventilation grate (8) comprises an H-shaped heat-resistant support structure (7) and a grate ventilation pipe (10). The grate ventilation pipe (10) is arranged on both sides of the H-shaped heat-resistant support structure (7), and ventilation holes (9) are provided on the grate ventilation pipe (10).

5. The safe low-carbon heat source supply equipment for cement industry according to claim 4 is characterized by: The air outlet direction of the ventilation hole (9) is 30° to 60° obliquely upward.

6. The safe low-carbon heat source supply equipment for cement industry according to claim 5 is characterized by: The furnace bottom blast system comprises a blower (12), the blower (12) is positively pressure-interlocked with the furnace body cone air duct (1), the blower (12) is connected to the grate bar ventilation duct (10) through an air supply duct, and an air volume regulating valve (11) is provided on the air supply duct.

7. The safe low-carbon heat source supply equipment for cement industry according to claim 1, 2, 5 or 6, characterized in that: The automatic ash unloading and cooling system comprises a forward and reverse motor (14), a spiral reamer mechanism (15), an ash receiving plate (16), and a cooling spray pipe (13). The ash receiving plate (16) is rotatably mounted at the bottom of the hot air furnace (3), and its mounting shaft is connected to the shaft of the forward and reverse motor (14). The lower side of the ash receiving plate (16) is connected to the spiral reamer mechanism (15). The cooling spray pipe (13) is arranged on both sides of the spiral reamer mechanism (15), and nozzles (17) are evenly arranged thereon. An ash collecting device is arranged at the end of the spiral reamer mechanism (15).

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