Gluing material vertical mill waste gas waste heat circulating device

Abstract

The utility model discloses a waste gas waste heat circulating device of a vertical mill for cementing materials. The waste gas waste heat circulating device comprises a vertical mill, a waste gas outlet of the vertical mill is connected with an exhaust main pipe, and the exhaust end of the exhaust main pipe is connected with a first exhaust branch pipe, a second exhaust branch pipe and a third exhaust branch pipe; the first exhaust branch pipe is communicated with a chimney, and the gas outlet ends of the second exhaust branch pipe and the third exhaust branch pipe are respectively communicated with the waste gas recovery main pipe; the exhaust end of the waste gas recovery main pipe is connected with an air inlet of the hot blast stove, and the hot blast stove is communicated with an air inlet of the vertical mill. High-temperature waste gas generated by the vertical mill is introduced into the waste gas recovery main pipe, heat energy is recovered through the hot blast stove, heat is provided for the hot blast stove through preheating in the waste gas, energy consumption of the hot blast stove is reduced, finally, the waste gas returns to the vertical mill through the gas inlet main pipe, and a closed circulation system is formed. Waste heat in waste gas is effectively recycled, the heat energy utilization efficiency is improved, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of adhesive solid material production, and particularly relates to an adhesive solid material vertical mill waste gas waste heat circulation device. Background Art

[0002] During the slag processing, the vertical mill will generate a large amount of high-temperature exhaust gas. In traditional processes, these exhaust gases are usually discharged directly. The hot flue gas from the mill passes through the mineral powder vertical mill and is balanced by the circulating air duct. The exhaust gas volume discharged to the chimney reaches 80,000 cubic meters per hour, and the temperature of the discharged hot flue gas is about 100°C. The heat energy consumption is serious, resulting in energy waste and environmental pollution. How to improve the thermal energy utilization efficiency of the vertical mill system and reduce the energy consumption of the hot blast furnace is an urgent problem to be solved. Therefore, it is necessary to design a waste heat circulation device for the waste gas of the cement-solid vertical mill to recycle and utilize the waste heat of the waste gas. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a waste heat circulation device for waste gas of a vertical mill for solid materials to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A waste heat recycling device for a vertical mill for cement-solidified materials comprises a vertical mill; the waste gas outlet of the vertical mill is connected to an exhaust main pipe, wherein the exhaust end of the exhaust main pipe is connected to a first exhaust branch pipe, a second exhaust branch pipe and a third exhaust branch pipe; the first exhaust branch pipe is connected to a chimney, wherein the outlet ends of the second exhaust branch pipe and the third exhaust branch pipe are respectively connected to a waste gas recovery main pipe; the exhaust end of the waste gas recovery main pipe is connected to an air inlet of a hot blast furnace, wherein the air outlet of the hot blast furnace is connected to the air inlet of the vertical mill through an air inlet pipe.

[0006] Preferably, a dust collector is provided on the exhaust main pipe; the air inlet end of the dust collector is connected to the exhaust main pipe, wherein the air outlet end of the dust collector is connected to the first exhaust branch pipe, the second exhaust branch pipe and the third exhaust branch pipe respectively.

[0007] Preferably, an exhaust fan is installed on the first exhaust branch pipe, wherein an air inlet end of the exhaust fan is connected to the first exhaust branch pipe, and an air outlet end of the exhaust fan is connected to the chimney.

[0008] Preferably, a heat exchanger is connected to the second exhaust branch pipe; the air inlet end of the heat exchanger is in communication with the second exhaust branch pipe, wherein the air outlet end of the heat exchanger is in communication with the exhaust gas recovery main pipe.

[0009] Preferably, a return fan is connected to the third exhaust branch pipe; the air inlet end of the return fan is connected to the third exhaust branch pipe, wherein the air outlet end of the return fan is connected to the exhaust gas recovery main pipe.

[0010] Preferably, a vacuum pump and an exhaust gas control valve are provided on the exhaust gas recovery main pipe, wherein the exhaust gas control valve is arranged at the air inlet end of the vacuum pump.

[0011] Preferably, the air outlet of the hot blast stove is provided with a temperature sensor and an air intake valve, wherein the air intake valve is connected to an air intake main pipe.

[0012] Preferably, outer walls of the exhaust main pipe, the exhaust gas recovery main pipe and the air intake main pipe are respectively provided with a thermal insulation layer.

[0013] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects: the utility model introduces the high-temperature exhaust gas generated by the vertical mill into the exhaust gas recovery main pipe, and then recovers heat energy through the hot blast furnace, and uses the preheating in the exhaust gas to provide heat for the hot blast furnace, thereby reducing the energy consumption of the hot blast furnace, and finally returns to the vertical mill through the air intake main pipe, thereby forming a closed circulation system, effectively recovering and utilizing the waste heat in the exhaust gas, improving the efficiency of thermal energy utilization, and reducing energy consumption; through exhaust gas recovery and recycling, the amount of high-temperature exhaust gas directly discharged into the atmosphere is greatly reduced, thereby effectively reducing pollution to the environment; by recovering the waste heat in the exhaust gas, the energy consumption of the hot blast furnace and the exhaust gas treatment cost are reduced, thereby providing a more stable hot air source for the vertical mill, reducing production costs, and improving the economic benefits of the enterprise.

[0014] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 The utility model is a schematic diagram of the structure of the waste heat circulation device of the waste gas of the vertical mill for solid materials.

[0017] Among them: 1. Vertical mill; 2. Exhaust main pipe; 3. First exhaust branch pipe; 4. Second exhaust branch pipe; 5. Third exhaust branch pipe; 6. Chimney; 7. Waste gas recovery main pipe; 8. Hot air furnace; 9. Intake main pipe; 10. Dust collector; 11. Exhaust fan; 12. Heat exchanger; 13. Return fan; 14. Vacuum pump; 15. Exhaust control valve; 16. Temperature sensor; 17. Intake valve. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1 To achieve the above purpose, the utility model provides the following technical solutions:

[0020] A waste heat recycling device for waste gas of a vertical mill for cement-solidified materials, comprising a vertical mill 1, wherein the waste gas outlet of the vertical mill 1 is connected to an exhaust main pipe 2, wherein the exhaust end of the exhaust main pipe 2 is connected to a first exhaust branch pipe 3, a second exhaust branch pipe 4 and a third exhaust branch pipe 5; the first exhaust branch pipe 3 is connected to a chimney 6, wherein the outlet ends of the second exhaust branch pipe 4 and the third exhaust branch pipe 5 are respectively connected to a waste gas recovery main pipe 7, and the exhaust end of the waste gas recovery main pipe 7 is connected to an air inlet of a hot blast furnace 8, wherein the air outlet of the hot blast furnace 8 is connected to the air inlet of the vertical mill 1 through an air inlet main pipe 9; the vertical mill 1 generates high The hot exhaust gas is introduced into the exhaust gas recovery pipe 7 through the exhaust pipe 2, and then the high-temperature exhaust gas is transported to the hot blast furnace 8 through the exhaust gas recovery pipe 7 for heat energy recovery. The preheating in the exhaust gas is used to provide heat for the hot blast furnace 8, thereby reducing the energy consumption of the hot blast furnace 8. Finally, the heated exhaust gas is transported to the vertical mill 1 through the air intake pipe 9, forming a closed circulation system, which effectively recovers and utilizes the waste heat in the exhaust gas, improves the thermal energy utilization efficiency, reduces energy consumption, and reduces the energy consumption of the hot blast furnace 8 and the exhaust gas treatment cost, effectively reducing the production cost and improving the economic benefits of the enterprise.

[0021] See also Figure 1 As an embodiment of the utility model, a dust collector 10 is provided on the exhaust main pipe 2, and the air inlet end of the dust collector 10 is connected to the exhaust main pipe 2, wherein the air outlet end of the dust collector 10 is respectively connected to the first exhaust branch pipe 3, the second exhaust branch pipe 4 and the third exhaust branch pipe 5; an exhaust fan 11 is installed on the first exhaust branch pipe 3, wherein the air inlet end of the exhaust fan 11 is connected to the first exhaust branch pipe 3, and the air outlet end of the exhaust fan 11 is connected to the chimney 6; a heat exchanger 12 is connected to the second exhaust branch pipe 4, and the air inlet end of the heat exchanger 12 is connected to the second exhaust branch pipe 4, wherein the air outlet end of the heat exchanger 12 is connected to the exhaust gas recovery main pipe 7; a return fan 13 is connected to the third exhaust branch pipe 5, and the air inlet end of the return fan 13 is connected to the third exhaust branch pipe 5, wherein the air outlet end of the return fan 13 is connected to the exhaust gas recovery main pipe 7.

[0022] In the above-described scheme, after the high-temperature exhaust gas generated by the vertical mill 1 enters the exhaust pipe 2, it will first flow through the dust collector 10, wherein the function of the dust collector 10 is to remove dust and other particulate matter from the exhaust gas to reduce the wear of subsequent equipment and pipelines, and at the same time avoid dust pollution to the environment. The air inlet end of the dust collector 10 is connected to the exhaust pipe 2. After the exhaust gas is filtered or electrostatically precipitated inside the dust collector 10, the clean exhaust gas is discharged from the air outlet end of the dust collector 10.

[0023] Furthermore, the exhaust gas after dust removal is diverted into three exhaust branch pipes, and a part of the exhaust gas is discharged through the first exhaust branch pipe 3, wherein the first exhaust branch pipe 3 is equipped with an exhaust fan 11, the air inlet end of the exhaust fan 11 is connected to the first exhaust branch pipe 3, and the air outlet end of the exhaust fan 11 is connected to the chimney 6, wherein the exhaust fan 11 provides power for the exhaust gas to ensure that the exhaust gas is smoothly discharged into the atmosphere through the chimney 6; another part of the exhaust gas enters the heat exchanger 12 through the second exhaust branch pipe 4, and the high-temperature exhaust gas is heat-exchanged with another medium (usually water or other coolant) in the heat exchanger 12, and the heat in the exhaust gas is transferred to the medium, thereby realizing the recovery and utilization of heat energy. The heat recovered by the heat exchanger 12 can be used for other process or heating, etc. The temperature of the exhaust gas after heat exchange is reduced, and then it is discharged into the exhaust gas recovery main pipe 7; the remaining exhaust gas passes through The third exhaust branch pipe 5 enters the return fan 13, wherein the air inlet end of the return fan 13 is connected to the third exhaust branch pipe 5, and the air outlet end of the return fan 13 is connected to the exhaust gas recovery main pipe 7, wherein the function of the return fan 13 is to provide power for this part of the exhaust gas, so that it can overcome the pipeline resistance and smoothly flow back to the exhaust gas recovery main pipe 7, and the returned exhaust gas and the exhaust gas cooled by the heat exchanger 12 are merged in the exhaust gas recovery main pipe 7, and then sent to the hot blast furnace 8 together for further heat energy recovery and utilization. The hot blast furnace 8 uses the waste heat of these exhaust gases to increase the temperature inside it, thereby reducing additional energy input. The hot air heated by the hot blast furnace 8 is re-sent into the air inlet of the vertical mill 1 through the air inlet main pipe 9, thereby forming a closed cycle, effectively recovering and utilizing the waste heat in the exhaust gas, greatly improving energy utilization efficiency, and reducing environmental pollution.

[0024] See also Figure 1 As an embodiment of the utility model, a vacuum pump 14 and an exhaust gas control valve 15 are provided on the exhaust gas recovery main pipe 7 , wherein the exhaust gas control valve 15 is arranged at the air inlet end of the vacuum pump 14 .

[0025] In the above-described scheme, the vacuum pump 14 is installed on the exhaust gas recovery main pipe 7 to generate negative pressure, helping the exhaust gas to be more smoothly extracted from the exhaust gas recovery main pipe 7 and transported to subsequent processing equipment; the exhaust gas control valve 15 is installed on the exhaust gas recovery main pipe 7. The main function of the exhaust gas control valve 15 is to control the flow rate of the exhaust gas. The exhaust gas control valve 15 is usually controlled by an actuator (such as a pneumatic or electric actuator) and can be operated automatically or manually as needed. The exhaust gas control valve 15 is installed before the air inlet end of the vacuum pump 14. This design is to protect the vacuum pump 14 from excessive pressure or unnecessary operation when it is necessary to adjust or cut off the exhaust gas flow, thereby improving energy utilization efficiency and providing important guarantees for the stable operation of the system.

[0026] See also Figure 1 As an embodiment of the utility model, the air outlet of the hot air furnace 8 is provided with a temperature sensor 16 and an air intake valve 17 , wherein the air intake valve 17 is connected to the air intake main pipe 9 .

[0027] In the above-described scheme, the temperature sensor 16 is used to continuously monitor the temperature of the air outlet of the hot blast furnace 8 to ensure that the air outlet temperature of the hot blast furnace 8 meets the expectations. If the air outlet temperature of the hot blast furnace 8 is abnormal, the temperature sensor 16 will trigger an alarm to notify the operator to check the working status of the hot blast furnace to prevent damage to the equipment due to excessively high or low temperature; the air intake valve 17 is used to adjust the opening to control the flow rate of hot air entering the air intake main pipe 9 to ensure that the vertical mill 1 obtains an appropriate amount of hot air with a moderate temperature, thereby optimizing the grinding process. When the temperature sensor 16 detects an abnormal temperature, the air intake valve 17 can quickly adjust the opening to reduce or increase the amount of hot air entering the vertical mill 1, thereby quickly restoring the air outlet to a normal temperature range. In an emergency, such as a failure of the hot blast furnace 8 or a sudden rise in temperature, the air intake valve 17 can be quickly closed to cut off the connection between the hot blast furnace 8 and the vertical mill 1 to prevent potential safety accidents.

[0028] See also Figure 1 As an embodiment of the utility model, the outer walls of the exhaust pipe 2, the exhaust gas recovery pipe 7 and the air intake pipe 9 are respectively provided with insulation layers.

[0029] In the above-described scheme, insulation layers are respectively arranged on the outer walls of the exhaust pipe 2, the exhaust gas recovery pipe 7 and the intake pipe 9, wherein the main function of the insulation layer is to reduce the heat loss of the high-temperature gas or liquid in the pipeline to the external environment, which helps to maintain the temperature of the fluid in the pipeline and improve the energy utilization efficiency. Moreover, the insulation layer can reduce the thermal stress caused by temperature changes in the pipeline, thereby extending the service life of the pipeline.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0031] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above-mentioned embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the utility model, and should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A waste heat recycling device for waste gas from a vertical mill for cement-solidified materials, comprising a vertical mill (1); characterized in that: The exhaust gas outlet of the vertical mill (1) is connected to an exhaust main pipe (2), wherein the exhaust end of the exhaust main pipe (2) is connected to a first exhaust branch pipe (3), a second exhaust branch pipe (4) and a third exhaust branch pipe (5); the first exhaust branch pipe (3) is connected to a chimney (6), wherein the exhaust ends of the second exhaust branch pipe (4) and the third exhaust branch pipe (5) are respectively connected to an exhaust gas recovery main pipe (7); the exhaust end of the exhaust gas recovery main pipe (7) is connected to an air inlet of a hot blast furnace (8), wherein the air outlet of the hot blast furnace (8) is connected to an air inlet of the vertical mill (1) through an air inlet pipe (9).

2. The waste heat recycling device for waste gas from a vertical mill for cement-solidified materials according to claim 1, characterized in that: The exhaust main pipe (2) is provided with a dust collector (10), wherein the gas outlet end of the dust collector (10) is respectively connected to the first exhaust branch pipe (3), the second exhaust branch pipe (4) and the third exhaust branch pipe (5).

3. The waste heat recycling device for waste gas from a vertical mill for cement-solidified materials according to claim 2, characterized in that: An exhaust fan (11) is installed on the first exhaust branch pipe (3), wherein an air inlet end of the exhaust fan (11) is connected to the first exhaust branch pipe (3), and an air outlet end of the exhaust fan (11) is connected to the chimney (6).

4. The waste heat recycling device for waste gas from a vertical mill for cement-solidified materials according to claim 2, characterized in that: The second exhaust branch pipe (4) is connected to a heat exchanger (12), wherein the gas outlet end of the heat exchanger (12) is in communication with the exhaust gas recovery main pipe (7).

5. The waste heat recycling device for waste gas from a vertical mill for cement-solidified materials according to claim 2, characterized in that: The third exhaust branch pipe (5) is connected to a return fan (13), wherein the air outlet end of the return fan (13) is in communication with the exhaust gas recovery main pipe (7).

6. The waste heat recycling device for waste gas from a vertical mill for cement-solidified materials according to claim 1, characterized in that: The exhaust gas recovery main pipe (7) is provided with a vacuum pump (14) and an exhaust gas control valve (15), wherein the exhaust gas control valve (15) is arranged at the air inlet end of the vacuum pump (14).

7. The waste heat recycling device for waste gas from a vertical mill for cement-solidified materials according to claim 1, characterized in that: The air outlet of the hot air furnace (8) is provided with a temperature sensor (16) and an air intake valve (17), wherein the air intake valve (17) is connected to the air intake main pipe (9).

8. The waste heat recycling device for waste gas from a vertical mill for cement-solidified materials according to claim 1, characterized in that: The outer walls of the exhaust main pipe (2), the waste gas recovery main pipe (7) and the air intake main pipe (9) are respectively provided with a thermal insulation layer.

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