CN210154360U - Waste gas recovery system - Google Patents

Waste gas recovery system Download PDF

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Publication number
CN210154360U
CN210154360U CN201920927854.2U CN201920927854U CN210154360U CN 210154360 U CN210154360 U CN 210154360U CN 201920927854 U CN201920927854 U CN 201920927854U CN 210154360 U CN210154360 U CN 210154360U
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China
Prior art keywords
air
pipeline
air intake
coal mill
power generation
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Expired - Fee Related
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CN201920927854.2U
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Chinese (zh)
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唐成忠
黄学平
袁兴
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Chongqing Xinjianan Building Materials Co Ltd
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Chongqing Xinjianan Building Materials Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods

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Abstract

The application relates to the technical field of energy conservation and environmental protection, in particular to a waste gas recovery system. The waste gas recovery system comprises a cement production system, a waste heat power generation system and an air swept coal mill system; the cement production system is communicated with the waste heat power generation system; a recovery pipeline is arranged between the waste heat power generation system and the air sweeping coal mill system, and waste gas flowing out of the waste heat power generation system can flow into the air sweeping coal mill system from the recovery pipeline; the recovery pipeline comprises a main pipeline and an air intake pipeline; the main pipeline is communicated with an air intake pipeline, the main pipeline is communicated with an air outlet of the waste heat power generation system, and the air intake pipeline is communicated with a first air inlet of the air sweeping coal mill system. This application will be linked together through the first air intake that waste heat power generation process back exhaust waste gas and wind swept the coal and grind the system through the recovery pipeline, carries out reutilization, energy saving and environmental protection more to waste gas.

Description

Waste gas recovery system
Technical Field
The application relates to the technical field of energy conservation and environmental protection, in particular to a waste gas recovery system.
Background
The kiln head waste gas temperature of the novel dry method rotary kiln is about 350 ℃, waste gas is generally used for waste heat power generation and serves as a wind sweeping coal mill hot air source, wherein partial waste gas used for waste heat power generation is directly discharged into the atmosphere after dust removal treatment, the partial waste gas has certain waste heat, particles are carried in the waste gas, and the waste of energy and pollution to the environment are caused when the waste gas is directly discharged into the atmosphere.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide a waste gas recovery system, through trunk line and air intake pipeline, will sweep the first air intake of coal mill system with wind through exhaust-heat power generation process back exhaust waste gas and be linked together, carry out reutilization to waste gas, and wind sweep the coal mill in the coal mill system and can be with particulate matter and hot-blast separation, energy saving and environmental protection more.
The application provides a waste gas recovery system, which comprises a cement production system, a waste heat power generation system and an air swept coal mill system;
the cement production system is communicated with the waste heat power generation system;
a recovery pipeline is arranged between the waste heat power generation system and the air-swept coal mill system, and waste gas flowing out of the waste heat power generation system can flow into the air-swept coal mill system from the recovery pipeline;
the recovery pipeline comprises a main pipeline and an air intake pipeline; the main pipeline with the pipeline of getting wind is linked together, wherein, the main pipeline with the air outlet of cogeneration system is linked together, the pipeline of getting wind is linked together with the first air intake of wind sweep coal mill system.
In the technical scheme, further, an air outlet of the grate cooler of the cement production system is communicated with a second air inlet of the air sweeping coal grinding system.
In the above technical scheme, further, the recovery pipeline still includes air inlet valve, be provided with on the trunk line air inlet valve, air inlet valve is used for adjusting the air inlet amount of wind of trunk line.
In the above technical scheme, further, the number of the air intake pipelines is at least one, one of the air intake pipelines is communicated with the first air inlet of the air swept coal mill system, and the rest of the air intake pipelines are used for being communicated with air intake equipment in the cement production system.
In the above technical scheme, further, the air intake device is a grate cooler, and one of the air intake pipelines is communicated with an air inlet of the grate cooler in the cement production system.
In the above technical solution, further, the recovery pipeline further includes an air intake fan, and the air intake fan is disposed on any one of the air intake pipelines except the air intake pipeline communicated with the first air inlet of the air swept coal mill system.
In the above technical scheme, further, the recovery pipeline further includes an air intake valve, the air intake valve is arranged on the air intake pipeline, and the air intake valve is used for adjusting the air intake volume of the air intake pipeline.
In the above technical solution, further, the intake valve and the intake valve are electrically operated valves.
In the above technical scheme, further, the air intake valve is a butterfly valve, and a butterfly plate of the air intake valve is provided with a reinforcing rib.
In the above technical scheme, further, the diameter of the main pipeline is greater than the diameter of the air intake pipeline.
Compared with the prior art, the beneficial effect of this application is:
the waste gas recovery system comprises a cement production system, a waste heat power generation system and an air swept coal mill system; the cement production system is communicated with the waste heat power generation system; a recovery pipeline is arranged between the waste heat power generation system and the air sweeping coal mill system, and waste gas flowing out of the waste heat power generation system can flow into the air sweeping coal mill system from the recovery pipeline; the recovery pipeline comprises a main pipeline and an air intake pipeline; the main pipeline is communicated with an air intake pipeline, wherein the main pipeline is communicated with an air outlet of the waste heat power generation system, and the air intake pipeline is communicated with a first air inlet of the air sweeping coal grinding system.
Specifically, the waste gas recovery system comprises a cement production system, a waste heat power generation system and an air swept coal mill system, wherein the cement production system comprises a cement kiln for calcining cement clinker, specifically, the cement kiln is a dry-process cement kiln, waste gas can be generated in the cement production process, and the temperature of the waste gas at the kiln head of the dry-process rotary kiln is about 350 ℃. An air outlet of a traditional cement kiln is respectively communicated with a waste heat power generation system and an air sweeping coal grinding system, and waste gas is used in a power generation process and the air sweeping coal grinding process. When the wind swept coal mill takes wind, the wind swept coal mill often contends with a waste heat power generation system to cause interference to waste heat power generation; the hot air for the air swept coal mill needs to be opened by a cold air valve to mix cold air due to overhigh temperature, and the process also causes the problem of unreasonable distribution and utilization of waste gas.
The exhaust outlet of the cement kiln of the cement production system is limited to be communicated with the waste heat power generation system, namely, waste gas exhausted by the cement kiln is used for waste heat power generation; set up the recovery pipeline between the first air intake of cogeneration system and wind sweeping coal mill system, can be with in the wind sweeping coal mill system of leading into again of exhaust gas after the cogeneration, regard this part waste gas as main wind regime, reduced and produced "striving for" effect to the cogeneration system, and the wind sweeping coal mill among the wind sweeping coal mill system can be with the particulate matter and the hot-blast separation in the waste gas, reduced the particulate matter content in the waste gas. The recovery pipeline comprises a main pipeline and an air intake pipeline which are communicated, the main pipeline is a main circulation path of waste gas and is communicated with an air outlet of an exhaust fan of the waste heat power generation system; the air intake pipeline is a waste gas shunting path and is communicated with a first air inlet of an air swept coal mill of the air swept coal mill system, so that reasonable diversion of waste gas is realized.
The application provides a waste gas recovery system through trunk line and air intake pipeline, will sweep the first air intake that the coal ground system was swept to exhaust waste gas and wind behind the waste heat power generation process and be linked together, has carried out reutilization to waste gas, and wind in sweeping the coal ground system is swept the coal mill and can be with particulate matter and hot-blast separation, energy saving and environmental protection more.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a first configuration of an exhaust gas recovery system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a second configuration of an exhaust gas recovery system according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of an exhaust gas recovery system according to a second embodiment of the present application;
fig. 4 is a schematic structural diagram of an intake valve provided in the second embodiment of the present application.
In the figure: 101-a cement production system; 102-a cogeneration system; 103-air swept coal milling system; 104-a recovery pipeline; 105-a main conduit; 106-air intake duct; 107-a first air inlet; 108-an air outlet of the grate cooler; 109-a second air inlet; 110-an air inlet valve; 111-an air inlet of the grate cooler; 112-air taking fan; 113-air intake valve; 114-a butterfly plate; 115-reinforcing ribs; 116-cement kiln.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example one
Referring to fig. 1 and 2, the waste gas recovery system provided by the present application includes a cement production system 101, a cogeneration system 102, and an air swept coal mill system 103; the cement production system 101 is communicated with the waste heat power generation system 102; a recovery pipeline 104 is arranged between the waste heat power generation system 102 and the air swept coal mill system 103, and waste gas flowing out of the waste heat power generation system 102 can flow into the air swept coal mill system 103 from the recovery pipeline 104; the recovery duct 104 includes a main duct 105 and an air intake duct 106; the main pipe 105 is communicated with an air intake pipe 106, wherein the main pipe 105 is communicated with an air outlet of the waste heat power generation system 102, and the air intake pipe 106 is communicated with a first air inlet 107 of the air swept coal grinding system 103.
Specifically, the exhaust gas recovery system comprises a cement production system 101, a waste heat power generation system 102 and an air swept coal mill system 103, wherein the cement production system 101 comprises a cement kiln 116 for calcining cement clinker, specifically, the cement kiln 116 is a dry-process cement kiln 116, and exhaust gas can be generated in the cement production process, and generally, the exhaust gas temperature of the kiln head of the dry-process rotary kiln is about 350 ℃. An air outlet of the traditional cement kiln 116 is respectively communicated with the waste heat power generation system 102 and the air swept coal mill system 103, and waste gas is used for the power generation process and the air swept coal mill process. When the wind swept coal mill takes wind, the wind swept coal mill often contends with the waste heat power generation system 102 to cause interference to waste heat power generation; the hot air for the air swept coal mill needs to be opened by a cold air valve to mix cold air due to overhigh temperature, and the process also causes the problem of unreasonable distribution and utilization of waste gas.
The application limits the air outlet of the cement kiln 116 of the cement production system 101 to be communicated with the waste heat power generation system 102, namely, the waste gas exhausted by the cement kiln 116 is used for waste heat power generation; a recovery pipeline 104 is arranged between a first air inlet 107 of the waste heat power generation system 102 and the air sweeping coal grinding system 103, waste gas discharged after waste heat power generation can be introduced into the air sweeping coal grinding system 103 again, the waste gas is used as a main air source, the 'contention' effect on the waste heat power generation system 102 is reduced, a wind sweeping coal grinding machine in the air sweeping coal grinding system 103 can separate particles in the waste gas from hot air, and the content of the particles in the waste gas is reduced. The recovery pipeline 104 comprises a main pipeline 105 and an air intake pipeline 106 which are communicated, the main pipeline 105 is a main circulation path of waste gas and is communicated with an air outlet of an exhaust fan of the waste heat power generation system 102; the air intake pipeline 106 is a waste gas diversion path and is communicated with a first air inlet 107 of an air swept coal mill of the air swept coal mill system 103, so that reasonable diversion of waste gas is realized.
The application provides a waste gas recovery system, through trunk line 105 and air intake pipeline 106, will sweep the first air intake 107 that coal ground system 103 was swept to exhaust waste gas and wind after the cogeneration process and be linked together, carried out reutilization to waste gas, and the wind of sweeping among the coal ground system 103 is swept the coal mill and can be with particulate matter and hot-blast separation, energy saving and environmental protection more.
In an alternative embodiment of the embodiment, the exhaust outlet 108 of the grate cooler of the cement production system 101 is communicated with the second air inlet 109 of the air-swept coal mill system 103.
In this embodiment, the exhaust gas discharged after the cogeneration process is communicated with the first air inlet 107 of the air-swept coal mill system 103, and when the temperature of the exhaust gas discharged after the cogeneration does not meet the requirements of the air-swept coal mill system 103, the air outlet 108 of the grate cooler of the cement production system 101 may be communicated with the air-swept coal mill system 103. The grate cooler is an important host device in the cement production system 101, and has the main functions of cooling and conveying cement clinker; after the clinker is cooled, hot air can be discharged from an air outlet 108 of the grate cooler. Specifically, the hot air exhausted from the grate cooler is communicated with the second air inlet 109 of the air swept coal mill system 103 to serve as a hot air supplementary air source, and the air swept coal mill system 103 does not take air from the air outlet of the cement kiln 116, so that the 'contention' effect with the waste heat power generation system 102 is avoided. At this time, the first air inlet 107 is a cold air inlet of the air-swept coal mill system 103, and the second air inlet 109 is a hot air inlet of the air-swept coal mill system 103.
In an optional scheme of this embodiment, the recovery pipeline 104 further includes an air intake valve 110, the main pipeline 105 is provided with the air intake valve 110, and the air intake valve 110 is used for adjusting the air intake amount of the main pipeline 105.
In this embodiment, the existing cogeneration system 102 generally discharges the exhaust gas generated after the power generation process directly into the atmosphere through a discharge pipe; this application can be on current pipeline structure basis, divide into two the tunnel with waste heat power generation system 102's air outlet, wherein, be discharge pipe all the way, another way is recovery pipeline 104, can set up discharge valve on the discharge pipe, and recovery pipeline 104's trunk line 105 can set up air inlet valve 110, specifically can adjust the flow direction of the waste gas that waste heat power generation produced as required. For example, a discharge valve arranged on the discharge pipeline may be closed, and an intake valve 110 arranged on the main pipeline 105 may be opened, so as to recover the exhaust gas, and meanwhile, the intake valve 110 may also adjust the intake air volume of the main pipeline 105; or the air inlet valve 110 on the main pipe 105 can be closed and the exhaust valve on the exhaust pipe can be opened to directly exhaust the exhaust gas to the atmosphere without recovering the exhaust gas.
In an alternative solution of this embodiment, the number of the air intake pipes 106 is at least one, wherein one air intake pipe 106 is communicated with the first air inlet 107 of the air swept coal mill system 103, and the other air intake pipes 106 are used for being communicated with the air intake equipment in the cement production system 101.
In this embodiment, the number of the air intake pipes 106 can be set according to the requirement, wherein one air intake pipe 106 is communicated with the air swept coal mill system 103 to mainly guide the exhaust gas into the air swept coal mill process. The waste gas can be guided into other air intake equipment with air quantity needed through other air intake pipelines 106 according to the air quantity of the waste gas.
In an optional scheme of this embodiment, the air intake device is a grate cooler, and one of the air intake pipelines 106 is communicated with an air inlet 111 of the grate cooler in the cement production system 101.
In the embodiment, the grate cooler is used for cooling and conveying cement clinker; after the clinker enters the grate cooler from the kiln, a material layer with a certain thickness is paved on the grate plate, and the blown cold air passes through the material layer moving on the grate plate in the mutually vertical direction to quench the clinker, so that the clinker can be quenched from 1300-1400 ℃ to below 100 ℃ within a few minutes. An air intake pipeline 106 is communicated with an air inlet 111 of the grate cooler, and the recycled waste gas can be used as a cold air source for cooling clinker.
Example two
In the second embodiment, the technical contents disclosed in the above embodiments are not described repeatedly, and the contents disclosed in the above embodiments also belong to the contents disclosed in the second embodiment.
Referring to fig. 3, in an alternative embodiment, the recovery duct 104 further includes an air intake fan 112, and the air intake fan 112 is disposed on any air intake duct 106 of the air intake ducts 106 communicated with the first air inlet 107 of the air swept coal grinding system 103.
In this embodiment, the air swept coal mill of the air swept coal mill system 103 has suction force and can suck the exhaust gas into the equipment, so that the air intake fan 112 does not need to be arranged on the air intake duct 106 communicated with the air swept coal mill system 103, and for other equipment requiring the exhaust gas, such as a grate cooler, the air intake fan 112 needs to be arranged on the air intake duct 106 to blow the exhaust gas into the equipment.
In an optional scheme of this embodiment, the recovery pipeline 104 further includes an air intake valve 113, the air intake pipeline 106 is provided with the air intake valve 113, and the air intake valve 113 is used to adjust an air intake volume of the air intake pipeline 106.
In this embodiment, the air intake duct 106 is provided with an air intake valve 113 to adjust the air intake volume of the air intake duct 106, that is, the air intake volume can be controlled by adjusting the valve according to the air volume requirement of each air intake device, and the valve can be adjusted between a fully closed state and a fully opened state.
In an alternative of this embodiment, the intake valve 113 and the intake valve 110 are electrically operated valves.
In this embodiment, the intake valve 113 and the intake valve 110 are electrically operated valves, and the electrically operated valves may be connected to a control system, and the control system may be used to adjust the valves.
Referring to fig. 4, in an alternative embodiment of the present invention, the intake valve 110 is a butterfly valve, and a rib 115 is disposed on a butterfly plate 114 of the intake valve 110.
In this embodiment, since the inlet valve 110 is located on the main pipe 105, the main pipe 105 serves as a main path for exhaust gas to flow through, and the flow rate of the exhaust gas is large, which requires a large strength for the inlet valve 110. The air inlet valve 110 may be provided with two butterfly plates 114, the two butterfly plates 114 are connected by bolts, and a reinforcing rib 115 is provided on a plate surface of the butterfly plate 114 for increasing the strength of the butterfly plate 114.
In an alternative to this embodiment, the main duct 105 has a larger diameter than the draft duct 106.
In this embodiment, the main pipe 105 is the main flow path of the exhaust gas, and the air intake pipe 106 is the branch path of the exhaust gas, so the diameter of the main pipe 105 is set to be larger than that of the air intake pipe 106 to adapt to different exhaust gas flow rates.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application. Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments.

Claims (10)

1. A waste gas recovery system is characterized by comprising a cement production system, a waste heat power generation system and an air swept coal mill system;
the cement production system is communicated with the waste heat power generation system;
a recovery pipeline is arranged between the waste heat power generation system and the air-swept coal mill system, and waste gas flowing out of the waste heat power generation system can flow into the air-swept coal mill system from the recovery pipeline;
the recovery pipeline comprises a main pipeline and an air intake pipeline; the main pipeline with the pipeline of getting wind is linked together, wherein, the main pipeline with the air outlet of cogeneration system is linked together, the pipeline of getting wind is linked together with the first air intake of wind sweep coal mill system.
2. The exhaust gas recovery system of claim 1, wherein the exhaust outlet of the grate cooler of the cement production system is communicated with the second air inlet of the air swept coal mill system.
3. The exhaust gas recovery system of claim 1, wherein the recovery pipeline further comprises an air inlet valve, the air inlet valve is disposed on the main pipeline, and the air inlet valve is used for adjusting the air inlet amount of the main pipeline.
4. The waste gas recovery system of claim 1, wherein the number of the air intake pipes is at least one, one of the air intake pipes is communicated with the first air inlet of the air swept coal mill system, and the rest of the air intake pipes are used for being communicated with air intake equipment in the cement production system.
5. The waste gas recovery system of claim 4, wherein the air intake device is a grate cooler, and one of the air intake pipes is communicated with an air inlet of the grate cooler in the cement production system.
6. The exhaust gas recovery system of claim 4, wherein the recovery pipeline further comprises an air intake fan, and the air intake fan is disposed on any one of the air intake pipelines except the air intake pipeline communicated with the first air inlet of the air-swept coal mill system.
7. The exhaust gas recovery system of claim 3, wherein the recovery pipeline further comprises an air intake valve, and the air intake valve is arranged on the air intake pipeline and used for adjusting the air intake volume of the air intake pipeline.
8. The exhaust gas recovery system of claim 7, wherein the intake valve and the intake valve are electrically actuated valves.
9. The exhaust gas recovery system of claim 3, wherein the air inlet valve is a butterfly valve, and a rib is provided on a butterfly plate of the air inlet valve.
10. An exhaust gas recovery system according to claim 1, wherein the main duct has a diameter greater than the diameter of the draft duct.
CN201920927854.2U 2019-06-19 2019-06-19 Waste gas recovery system Expired - Fee Related CN210154360U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920927854.2U CN210154360U (en) 2019-06-19 2019-06-19 Waste gas recovery system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920927854.2U CN210154360U (en) 2019-06-19 2019-06-19 Waste gas recovery system

Publications (1)

Publication Number Publication Date
CN210154360U true CN210154360U (en) 2020-03-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920927854.2U Expired - Fee Related CN210154360U (en) 2019-06-19 2019-06-19 Waste gas recovery system

Country Status (1)

Country Link
CN (1) CN210154360U (en)

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