Waste incineration flue gas deacidification treatment system

Abstract

The utility model relates to the technical field of waste incineration flue gas deacidification, and provides a waste incineration flue gas deacidification treatment system which comprises a reaction tower, dust removal equipment, pneumatic conveying equipment, a first pipeline, a second pipeline and a third pipeline, the pneumatic conveying equipment is provided with a first ash inlet used for being communicated with a first ash outlet of the dust removal equipment through a first pipeline and a second ash outlet used for being communicated with a second ash inlet of the dust storage system through a second pipeline. A third ash outlet communicated with a third ash inlet of the reaction tower through a third pipeline is formed in the second pipeline, and the third pipeline is used for communicating the pneumatic conveying equipment with the reaction tower, so that dust captured by the dust removal equipment can return to the reaction tower through the pneumatic conveying equipment and the third pipeline to react again, and the deacidification agent utilization rate of the system is increased; and the operation cost of the system is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste incineration flue gas deacidification, in particular to a waste incineration flue gas deacidification treatment system. Background Art

[0002] When the existing suspended semi-dry flue gas deacidification treatment system is used to deacidify the flue gas generated in the waste incineration system, the flue gas is transported into the reaction tower to mix with the deacidification agent, and the acid gas in the flue gas reacts with the deacidification agent to generate solid particles; the solid particles are suspended in the flue gas and mixed with the original fly ash in the flue gas, and enter the dust removal equipment with the flue gas; the dust captured from the flue gas by the dust removal equipment will be transported to the ash storage.

[0003] By detecting the composition of the dust captured by the dust removal equipment, it was found that the dust captured by the dust removal equipment is actually a deacidifier-fly ash mixture, in which there is 12% to 17% of incompletely reacted deacidifier. A large amount of deacidifier is not fully utilized and is directly transported to the ash storage together with the fly ash, resulting in a waste of deacidifier resources and higher operating costs of the system. Utility Model Content

[0004] The utility model discloses a waste incineration flue gas deacidification treatment system, which is used to solve the technical problem that the deacidification agent utilization rate of the existing suspended semi-dry flue gas deacidification treatment system is low, resulting in high system operation cost.

[0005] The utility model provides a waste incineration flue gas deacidification treatment system, comprising: a reaction tower, a dust removal device, a pneumatic conveying device, a first pipeline, a second pipeline and a third pipeline;

[0006] The reaction tower is provided with a first flue gas inlet for communicating with a first flue gas outlet of a waste incineration system, a deacidification agent inlet for connecting to a deacidification agent source, and a second flue gas outlet for communicating with a second flue gas inlet of the dust removal device;

[0007] The pneumatic conveying device is provided with a first ash inlet for communicating with a first ash outlet of the dust removal device through the first pipeline and a second ash outlet for communicating with a second ash inlet of the dust storage system through the second pipeline;

[0008] The first pipeline is provided with an air inlet for connecting to a fluidizing air source;

[0009] The second pipeline is provided with a third ash outlet for communicating with the third ash inlet of the reaction tower through the third pipeline.

[0010] Optionally, the pneumatic conveying equipment is a pneumatic conveying silo pump;

[0011] The pneumatic conveying device is provided with a compressed air inlet for connecting to a compressed air source and a pressure detection device for detecting the air pressure inside the pneumatic conveying device.

[0012] Optionally, the pneumatic conveying device is provided with a deacidifying agent content detection device for detecting the deacidifying agent content in the dust in the pneumatic conveying device and a weight detection device for weighing the weight of the dust in the pneumatic conveying device.

[0013] Optionally, a first valve is provided on a portion of the second pipeline between the second ash outlet and the third ash outlet.

[0014] Optionally, a second valve is provided on a portion of the second pipeline between the third ash outlet and the second ash inlet.

[0015] Optionally, a third valve is provided on the third pipeline.

[0016] Optionally, a fourth valve is provided on the pipeline connecting the compressed air inlet and the compressed air source.

[0017] Optionally, a first baffle is provided in the first pipeline.

[0018] Optionally, the waste incineration flue gas deacidification treatment system further includes a fourth pipeline;

[0019] The first pipeline is provided with a fourth ash outlet on a portion between the first baffle and the first ash outlet;

[0020] The fourth pipeline is used to connect the fourth ash outlet with the fourth ash inlet of the reaction tower;

[0021] A second baffle is arranged in the fourth pipeline.

[0022] Optionally, the waste incineration flue gas deacidification treatment system further includes a control module;

[0023] The control module includes a programmable controller for controlling the on / off status of each pipeline and for monitoring and collecting measurement data of the detection device in the pneumatic conveying equipment.

[0024] It can be seen from the above technical solutions that the utility model has the following advantages:

[0025] The utility model provides a waste incineration flue gas deacidification treatment system, the system includes a reaction tower, a dust removal device, a pneumatic conveying device, a first pipeline, a second pipeline and a third pipeline, wherein the reaction tower is provided with a first flue gas inlet for communicating with a first flue gas outlet of the waste incineration system, a deacidification agent inlet for connecting a deacidification agent source and a second flue gas outlet for communicating with a second flue gas inlet of the dust removal device, the pneumatic conveying device is provided with a first ash inlet for communicating with a first ash outlet of the dust removal device through the first pipeline and a second ash outlet for communicating with a second ash inlet of a dust storage system through the second pipeline, and a third ash outlet for communicating with a third ash inlet of the reaction tower through the third pipeline is provided on the second pipeline. In the waste incineration flue gas deacidification treatment system provided by the utility model, the third pipeline connects the pneumatic conveying device and the reaction tower, so that the dust captured by the dust removal device can be returned to the reaction tower through the pneumatic conveying device and the third pipeline for re-reaction, thereby improving the deacidification agent utilization rate of the system and reducing the operating cost of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is a structural schematic diagram of a waste incineration flue gas deacidification treatment system provided in an embodiment of the utility model.

[0028] Explanation of the accompanying drawings: 1-reaction tower, 2-dust removal equipment, 3-pneumatic conveying equipment, 31-pressure detection device, 32-fourth valve, 4-first pipeline, 41-first baffle, 5-second pipeline, 51-first valve, 52-second valve, 6-third pipeline, 61-third valve, 7-fourth pipeline, 71-second baffle, 8-control module, 91-deacidifying agent storage bin, 92-deacidifying agent injection fan, 93-deacidifying agent injector. DETAILED DESCRIPTION

[0029] The utility model discloses a waste incineration flue gas deacidification treatment system, which solves the technical problem that the deacidification agent utilization rate of the existing suspended semi-dry flue gas deacidification treatment system is low, resulting in high system operation cost.

[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance, nor can they indicate or imply quantity.

[0032] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] See also Figure 1 The embodiment of the utility model provides a waste incineration flue gas deacidification treatment system, comprising: a reaction tower 1, a dust removal device 2, a pneumatic conveying device 3, a first pipeline 4, a second pipeline 5 and a third pipeline 6;

[0034] The reaction tower 1 is provided with a first flue gas inlet for communicating with a first flue gas outlet of the waste incineration system, a deacidification agent inlet for connecting to a deacidification agent source, and a second flue gas outlet for communicating with a second flue gas inlet of the dust removal device 2;

[0035] The pneumatic conveying device 3 is provided with a first ash inlet for communicating with a first ash outlet of the dust removal device 2 through a first pipeline 4 and a second ash outlet for communicating with a second ash inlet of the dust storage system through a second pipeline 5;

[0036] The first pipeline 4 is provided with an air inlet for connecting to a fluidizing air source;

[0037] The second pipeline 5 is provided with a third ash outlet for communicating with the third ash inlet of the reaction tower 1 through the third pipeline 6 .

[0038] It can be understood that the waste incineration flue gas deacidification treatment system provided by the utility model is used to deacidify the flue gas generated in the waste incineration system by using a suspended semi-dry method. Accordingly, the reaction tower 1 is a suspended semi-dry reaction tower; the first flue gas outlet of the waste incineration system is generally the flue gas outlet of the economizer of the waste incineration system; the deacidifying agent inlet, the first flue gas inlet, and the third ash inlet should be arranged at the bottom of the reaction tower 1, and the second flue gas outlet should be arranged at the top of the reaction tower 1; the dust removal equipment 2 can be an electrostatic precipitator, a bag dust collector, a pulse jet dust collector, a cyclone dust collector, etc., and preferably a bag dust collector with high dust removal efficiency and low equipment cost is adopted, and the number can be one or more; the deacidifying agent source 9 refers to the source equipment for providing the deacidifying agent, and the deacidifying agent is generally CaO and / or Ca(OH)2; specifically The deacidifying agent source may include a deacidifying agent storage bin 91, a deacidifying agent injection fan 92 and a deacidifying agent injector 93. The deacidifying agent injector 93 is arranged at the ash outlet of the deacidifying agent storage bin 91. The deacidifying agent injection fan 92 provides wind force for the deacidifying agent injector 93. The deacidifying agent injector 93 transports the deacidifying agent stored in the deacidifying agent storage bin 91 to the reaction tower 1 through a pipeline; the dust storage system is used to collect and store dust, and may include an ash bin body, a bin top equipment, an exhaust device, a material level indicator, an ash bin gasification system, a unloading system, etc.; the fluidizing air source refers to a source device that provides fluidizing gas (also called fluidizing air), such as a fluidizing fan; the position of the air inlet on the first pipeline 4 should be set at a position that helps to guide the fluidizing air to evenly contact with the dust discharged into the first pipeline 4 from the first ash outlet of the dust removal equipment 2.

[0039] The number of pneumatic conveying equipment 3 can be one or more. The pneumatic conveying equipment 3 refers to a device that uses the energy of airflow to transport granular materials along the direction of airflow in a confined space, and is used to transport the dust discharged through the first pipeline 4 to the dust storage system or the reaction tower 1, such as a pneumatic conveying pipeline system, a pneumatic conveying pump, a pneumatic conveying ejector, etc., preferably a pneumatic conveying silo pump, which can be used for long-distance transportation and has good anti-clogging performance; in the actual application of the waste incineration flue gas deacidification treatment system provided in this embodiment, the dust collected by the dust removal equipment 2 is discharged from the first ash outlet into the first pipeline 4, and is guided into the pneumatic conveying equipment 3 by the fluidizing wind. The dust in the pneumatic conveying equipment 3 can be transported to the dust storage system through the second pipeline 5, or transported to the reaction tower 1 through the third pipeline 6 for further reaction, thereby improving the utilization rate of the deacidifying agent of the system and reducing the operating cost of the system.

[0040] It should be noted that each pipeline in the waste incineration flue gas deacidification treatment system provided by the utility model is provided with a valve or baffle that can change the on-off state of the pipeline, and the on-off state of the pipeline includes a closed state and an open state; specifically, a first baffle 41 is provided in the first pipeline 4; a first valve 51 is provided on the part of the second pipeline 5 between the second ash outlet and the third ash outlet, a second valve 52 is provided on the part of the second pipeline 5 between the third ash outlet and the second ash inlet, and a third valve 61 is provided on the third pipeline 6. In actual application, when the first valve 51 and the second valve 52 are opened and the third valve 61 is closed, the dust in the pneumatic conveying equipment 3 is transported to the dust storage system; when the first valve 51 and the third valve 61 are opened and the second valve 52 is closed, the dust in the pneumatic conveying equipment 3 is transported back to the reaction tower 1 for further reaction.

[0041] In a preferred embodiment, the pneumatic conveying device 3 is a pneumatic conveying silo pump;

[0042] The pneumatic conveying device 3 is provided with a compressed air inlet for connecting to a compressed air source and a pressure detection device 31 for detecting the air pressure inside the pneumatic conveying device 3 .

[0043] In the actual application of the waste incineration flue gas deacidification treatment system provided in the preferred embodiment, when the first pipeline 4 is in an open state, the portion of the second pipeline 5 between the second ash outlet and the third ash outlet and the pipeline connecting the compressed air inlet and the compressed air source are in a closed state, the pneumatic conveying device 3 receives the dust transported in by the fluidizing air; after a certain amount of dust is received in the pneumatic conveying device 3, the first pipeline 4 can be closed, the pipeline connecting the compressed air inlet and the compressed air source can be opened, and the silo pump starts to increase the pressure; when the pressure measured by the pressure detection device 31 reaches the set pressure, the portion of the second pipeline 5 between the second ash outlet and the third ash outlet can be opened (the first valve 51 is opened), and the dust in the pneumatic conveying device 3 is transported to the dust storage system or the reaction tower 1; a fourth valve 32 is provided on the pipeline connecting the compressed air inlet of the pneumatic conveying device 3 and the compressed air source, and the on-off state of the pipeline connecting the compressed air inlet of the pneumatic conveying device 3 and the compressed air source can be changed by closing or opening the fourth valve 32.

[0044] Furthermore, the pneumatic conveying device 3 may be provided with a deacidifying agent content detection device and a weight detection device.

[0045] The deacidifying agent content detection device is used to detect the deacidifying agent content in the dust in the pneumatic conveying device 3, and can be a detection device using Raman spectroscopy, X-ray fluorescence spectroscopy or neutron activation analysis technology; the weight detection device is used to weigh the weight of the dust in the pneumatic conveying device 3; based on the above settings and common knowledge, technicians in this field can judge whether to enter the node of silo pump pressurization according to the dust weight detected by the weight detection device; according to the deacidifying agent content detected by the deacidifying agent content detection device, the dust in the pneumatic conveying device 3 can be selected to be transported to the dust storage system or the reaction tower 1. For example, when the deacidifying agent content of the dust in the pneumatic conveying device 3 is too low, it means that this batch of dust has no recycling value and can no longer be sent back to the reaction tower 1 for further reaction; according to the dust weight detected by the weight detection device and the deacidifying agent content detected by the deacidifying agent content detection device, the proportion of dust transported to the dust storage system and the reaction tower 1 can be calculated respectively, so as to accurately control the recycling of the deacidifying agent and improve the utilization rate of the deacidifying agent; the content of the above method is not within the scope of this scheme, and the above description is only combined with common knowledge to illustrate the beneficial effects that can be achieved by the above settings.

[0046] Since the dust cannot be sent back to the reaction tower for reaction while the pneumatic conveying equipment 3 receives the dust transported in by the fluidized air, the recycling efficiency is low. Therefore, the waste incineration flue gas deacidification treatment system provided by the utility model further includes a fourth pipeline 7. The first pipeline 4 is provided with a fourth ash outlet on the part between the first baffle 41 and the first ash outlet. The fourth pipeline 7 is used to connect the fourth ash outlet with the fourth ash inlet of the reaction tower 1. The fourth pipeline 7 is provided with a second baffle 71. After opening the first baffle 41 and the second baffle 71, the dust collected by the dust removal equipment 2 can be partially sent into the pneumatic conveying equipment 3 by the fluidized air, and partially sent into the reaction tower 1 by the fluidized air.

[0047] In a preferred embodiment, the waste incineration flue gas deacidification treatment system provided by the utility model further includes a control module 8;

[0048] The control module 8 includes a programmable logic controller (PLC) for controlling the on / off status of each pipeline and for monitoring and collecting the measurement data of the detection device in the pneumatic conveying equipment 3 .

[0049] Those skilled in the art can perform calculations, control feedback and verification on the data collected by the control module 8 based on common knowledge; in this preferred embodiment, the control unit 8 provides a hardware basis for the intelligent processing of the waste incineration flue gas deacidification treatment system, and the content involving specific programming to further realize the intelligent function is the method content that can be implemented by skilled technicians based on common knowledge. These method contents are not within the scope of this solution. The above description is only combined with common knowledge to illustrate the beneficial effects that can be achieved by improving this hardware structure. At the same time, the control of the on-off state of the pipeline by the programmable controller is also common knowledge. Those skilled in the art can select the controller and the valve or baffle as needed and connect them. Therefore, how to control is not described in detail in this embodiment.

[0050] The above is a detailed introduction to the waste incineration flue gas deacidification treatment system provided by the utility model. For general technicians in this field, according to the ideas of the embodiments of the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A waste incineration flue gas deacidification treatment system, characterized in that: include: Reaction tower, dust removal equipment, pneumatic conveying equipment, first pipeline, second pipeline and third pipeline; The reaction tower is provided with a first flue gas inlet for communicating with a first flue gas outlet of a waste incineration system, a deacidification agent inlet for connecting to a deacidification agent source, and a second flue gas outlet for communicating with a second flue gas inlet of the dust removal device; The pneumatic conveying device is provided with a first ash inlet for communicating with a first ash outlet of the dust removal device through the first pipeline and a second ash outlet for communicating with a second ash inlet of the dust storage system through the second pipeline; The first pipeline is provided with an air inlet for connecting to a fluidizing air source; The second pipeline is provided with a third ash outlet for communicating with the third ash inlet of the reaction tower through the third pipeline.

2. The waste incineration flue gas deacidification treatment system according to claim 1 is characterized in that: The pneumatic conveying equipment is a pneumatic conveying silo pump; The pneumatic conveying device is provided with a compressed air inlet for connecting to a compressed air source and a pressure detection device for detecting the air pressure inside the pneumatic conveying device.

3. The waste incineration flue gas deacidification treatment system according to claim 1 is characterized in that: The pneumatic conveying device is provided with a deacidifying agent content detection device for detecting the deacidifying agent content in the dust in the pneumatic conveying device and a weight detection device for weighing the weight of the dust in the pneumatic conveying device.

4. The waste incineration flue gas deacidification treatment system according to claim 1, characterized in that: A first valve is provided on a portion of the second pipeline between the second ash outlet and the third ash outlet.

5. The waste incineration flue gas deacidification treatment system according to claim 1, characterized in that: A second valve is provided on a portion of the second pipeline between the third ash outlet and the second ash inlet.

6. The waste incineration flue gas deacidification treatment system according to claim 1, characterized in that: The third pipeline is provided with a third valve.

7. The waste incineration flue gas deacidification treatment system according to claim 2, characterized in that: A fourth valve is arranged on the pipeline connecting the compressed air inlet and the compressed air source.

8. The waste incineration flue gas deacidification treatment system according to claim 1, characterized in that: A first baffle is arranged in the first pipeline.

9. The waste incineration flue gas deacidification treatment system according to claim 8, characterized in that: Also included is a fourth pipeline; The first pipeline is provided with a fourth ash outlet on a portion between the first baffle and the first ash outlet; The fourth pipeline is used to connect the fourth ash outlet with the fourth ash inlet of the reaction tower; A second baffle is arranged in the fourth pipeline.

10. The waste incineration flue gas deacidification treatment system according to any one of claims 1 to 9, characterized in that: Also includes a control module; The control module includes a programmable controller for controlling the on / off status of each pipeline and for monitoring and collecting measurement data of the detection device in the pneumatic conveying equipment.

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