Dry deacidification system
By filtration and recycling multiple times using a combination of nozzles and conveyors in the dry deacid system, the problem of chemical substances not being effectively recovered in the prior art is solved, and the recycling of resources and the improvement of flue gas treatment efficiency is achieved. .
Patent Information
- Application Number
- CN202420223006.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-01-30
AI Technical Summary
In the existing dry deacid system, chemical substances used to react with flue gas are not effectively recovered, resulting in waste of resources and high production costs.
A dry acid deacid system is designed to spray powdered chemicals into the smoke inlet passage through a spray nozzle, and filter and recycling multiple times using a series of conveyors and dust collectors, including the first bag dust collector and the first The scraper conveyor, the second scraper conveyor and the screw conveyor realize the secondary recycling and utilization of powdered chemical substances.
The effective recycling of powdered chemicals is achieved, production costs are reduced, and the efficiency of treating harmful gases in flue gas is improved.
Smart Images
Figure CN222256645U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of flue gas deacidification, and in particular relates to a dry deacidification system. Background Art
[0002] With the development of economy, the acceleration of urbanization and the modernization of material consumption, the amount of urban domestic waste generated has increased dramatically, and waste incineration has become one of the main methods for urban domestic waste treatment.
[0003] The flue gas after the garbage is burned in the incinerator contains a large amount of harmful gases, including hydrogen chloride, sulfur dioxide, hydrogen fluoride, nitrogen oxides and carbon monoxide. If these substances are directly discharged without treatment, they will cause great harm to the atmosphere. Deacidification refers to the use of powdered chemicals (such as calcium hydroxide, sodium bicarbonate, activated carbon, etc.) that can react with harmful gases in the deacidification equipment to achieve the purpose of deacidification.
[0004] With current technology, the alkaline substances used to purify flue gas are only used once, and the chemicals that have not reacted with the flue gas are not effectively recovered. Utility Model Content
[0005] The present application provides a dry deacidification system, which can solve the problem in the existing dry deacidification system that the chemical substances used to react with the flue gas are not effectively recovered.
[0006] The present application provides a dry deacidification system, comprising a smoke inlet channel, a first bag filter, a nozzle, a first scraper conveyor, a second scraper conveyor and a screw conveyor, wherein the smoke inlet channel is connected to the dust gas inlet of the first bag filter, the nozzle is arranged on the smoke inlet channel, and the nozzle is used to spray powdered chemicals into the smoke inlet channel, and the ash discharge port of the first bag filter is connected to the feed port of the first scraper conveyor;
[0007] The second scraper conveyor has a first outlet and a second outlet. The feed port and the first outlet of the second scraper conveyor are respectively located at two ends of the second scraper conveyor, and the second outlet is located in the middle of the second scraper conveyor. The discharge port of the first scraper conveyor is connected to the feed port of the second scraper conveyor. The first outlet is connected to a discharge pipe, and the discharge pipe is connected to an ash bin for collecting waste. A filter is provided at the second outlet cover, and the second outlet is connected to the feed port of the screw conveyor, and the discharge port of the screw conveyor is connected to the smoke inlet channel.
[0008] Optionally, the dry deacidification system also includes a second bag collector and a conveyor connected to the ash discharge port of the second bag collector, the smoke inlet channel is also connected to the dust gas inlet of the second bag collector, the discharge port of the conveyor is connected to the second scraper conveyor, and the discharge port of the conveyor is located between the first outlet and the second outlet.
[0009] Optionally, the clean air outlet of the first bag-type dust collector and the clean air outlet of the second bag-type dust collector are both connected to an exhaust passage, and the exhaust passage is connected to an air inlet of the induced draft fan.
[0010] Optionally, the discharge port of the screw conveyor is obliquely inserted into the smoke inlet channel along the airflow direction in the smoke inlet channel.
[0011] Optionally, the second outlet is connected to the screw conveyor via a collecting bucket.
[0012] Optionally, the dry deacidification system further includes a pneumatic conveying component, the inlet end of the pneumatic conveying component is connected to the outlet end of the discharge pipe, and the outlet end of the pneumatic conveying component is connected to the ash bin.
[0013] Optionally, the pneumatic conveying component includes a silo pump, a conveying pipe and an air compressor, the end of the discharge pipe away from the first outlet is connected to the inlet end of the silo pump, the outlet end of the silo pump is connected to the conveying pipe, the outlet end of the conveying pipe is connected to the ash bin, the silo pump is connected to the air compressor, and the air compressor is used to provide airflow to the silo pump.
[0014] Optionally, the second scraper conveyor is further provided with a third outlet, the third outlet is located at an end of the second scraper conveyor away from the first outlet, and the third outlet is connected to an ash discharge pipeline.
[0015] Optionally, the dry deacidification system further includes a transfer device, which is used to transfer the waste materials in the ash discharge pipeline to the ash storage.
[0016] Optionally, the transfer device includes a transfer trolley.
[0017] The above solution of the present application has the following beneficial effects:
[0018] The dry deacidification system provided in the present application can treat harmful gases in the flue gas by spraying powdered chemicals into the smoke inlet channel through a nozzle, and can also recycle the powdered chemicals through a first bag dust collector, a first scraper conveyor, a second scraper conveyor and a screw conveyor, thereby reducing production costs and improving the efficiency of treating harmful gases in the flue gas.
[0019] Other beneficial effects of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0021] Figure 1 Schematic diagram of a dry deacidification system provided in one embodiment of the present application Figure 1 ;
[0022] Figure 2 Schematic diagram of a dry deacidification system provided in one embodiment of the present application Figure 2 .
[0023] [Description of Reference Numerals]
[0024] 1. Smoke inlet channel; 2. First bag filter; 3. Nozzle; 4. First scraper conveyor; 5. Second scraper conveyor; 51. First outlet; 52. Second outlet; 53. Third outlet; 6. Screw conveyor; 7. Discharge pipe; 8. Second bag filter; 9. Exhaust channel; 10. Induced draft fan; 11. Collecting bucket; 12. Pneumatic conveying component; 121. Silo pump; 122. Conveying pipe; 123. Air compressor; 13. Ash discharge pipe; 14. Transfer device; 15. Ash storage. DETAILED DESCRIPTION
[0025] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.
[0026] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.
[0027] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.
[0028] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.
[0029] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.
[0030] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.
[0031] The dry deacidification system provided in the present application is exemplarily described below in conjunction with specific embodiments.
[0032] like Figure 1 and Figure 2 As shown, the dry deacidification system provided in the embodiment of the present application includes a smoke inlet channel 1, a first bag filter 2, a nozzle 3, a first scraper conveyor 4, a second scraper conveyor 5 and a screw conveyor 6. The smoke inlet channel 1 is connected to the dust gas inlet of the first bag filter 2. The nozzle 3 is arranged on the smoke inlet channel 1. The nozzle 3 is used to spray powdered chemicals into the smoke inlet channel 1. The ash discharge port of the first bag filter 2 is connected to the feed port of the first scraper conveyor 4; the second scraper conveyor 5 has a first outlet 51 and a second outlet 52. 2, the feed port of the second scraper conveyor 5 and the first outlet 51 are respectively located at the two ends of the second scraper conveyor 5, the second outlet 52 is located in the middle of the second scraper conveyor 5, the discharge port of the first scraper conveyor 4 is connected to the feed port of the second scraper conveyor 5, the first outlet 51 is connected to the discharge pipe 7, the discharge pipe 7 is connected to the ash bin 15 for collecting waste materials, the second outlet 52 is covered with a filter screen, the second outlet 52 is connected to the feed port of the screw conveyor 6, and the discharge port of the screw conveyor 6 is connected to the smoke inlet channel 1.
[0033] In the above embodiment, after the flue gas after the garbage is burned in the incinerator enters the smoke inlet channel 1, the nozzle 3 sprays powdered chemicals into the smoke inlet channel 1. The powdered chemicals (for example, calcium hydroxide, sodium bicarbonate, activated carbon, etc.) can react with harmful gases contained in the smoke, and the high pressure of the smoke entering the smoke inlet channel 1 sends the dust-containing gas after the reaction (it can be understood that the dust-containing gas after the reaction contains unreacted powdered chemicals) to the first bag filter 2. The filtering effect of the fiber fabric in the first bag filter 2 filters the dust-containing gas after the reaction, and discharges clean gas from the clean gas outlet of the first bag filter 2. The dust in the dust-containing gas after the reaction is transported to the first scraper conveyor 4 through the ash discharge port of the first bag filter 2, and then the first scraper conveyor 4 transports the dust to the second scraper conveyor 5. The dust entering the second scraper conveyor 5 first passes through the second outlet 52. The filter at the second outlet 52 filters the dust with relatively small particles (including unreacted powdered chemical substances) into the screw conveyor 6, and then the dust with relatively small particles is sent back into the smoke inlet channel 1 through the screw conveyor 6 for recycling. The dust not filtered by the filter at the second outlet 52 enters the discharge pipe 7 through the first outlet 51, and then is discharged into the ash storage 15 for collecting waste materials through the discharge pipe 7.
[0034] The dry deacidification system provided in the present application can not only treat harmful gases in the flue gas, but also recycle the powdered chemicals injected to react with the harmful gases for secondary utilization, thereby reducing production costs and improving the efficiency of treating harmful gases in the flue gas.
[0035] Preferably, the smoke inlet channel 1 can be set to be long enough, and a plurality of nozzles 3 can be arranged along the length direction of the smoke inlet channel 1 so that the powdered chemical substances can fully react with the harmful gases in the smoke.
[0036] In one embodiment, if Figure 1 and Figure 2 As shown, the dry deacidification system also includes a second bag filter 8 and a conveyor (not shown in the figure) connected to the ash discharge port of the second bag filter 8, the smoke inlet channel 1 is also connected to the dust gas inlet of the second bag filter 8, the discharge port of the conveyor is connected to the second scraper conveyor 5, and the discharge port of the conveyor is located between the first outlet 51 and the second outlet 52.
[0037] In the above embodiment, by setting up the first bag filter 2 and the second bag filter 8, the reacted dust-containing gas output from the smoke inlet channel 1 is diverted and filtered through the first bag filter 2 and the second bag filter 8 respectively to improve the filtering efficiency.
[0038] Specifically, the conveyor is mainly used to convey the dust discharged from the dust discharge port of the second bag filter 8 to the second scraper conveyor 5. Exemplarily, the conveyor can be a scraper conveyor.
[0039] In a specific embodiment, Figure 1 and Figure 2 As shown, the clean air outlet of the first bag filter 2 and the clean air outlet of the second bag filter 8 are both connected to an exhaust passage 9 , and the exhaust passage 9 is connected to the air inlet of the induced draft fan 10 .
[0040] In the above embodiment, the negative pressure generated by the induced draft fan 10 is used to introduce the purified gas from the clean gas outlet of the first bag filter 2 and the clean gas outlet of the second bag filter 8 into the air inlet of the induced draft fan 10 through the exhaust passage 9 respectively, so that the purified gas is discharged into the atmosphere.
[0041] In one embodiment, if Figure 1 As shown, the discharge port of the screw conveyor 6 is obliquely inserted into the smoke inlet channel 1 along the airflow direction in the smoke inlet channel 1 .
[0042] In the above embodiment, if the outlet of the screw conveyor 6 is inserted perpendicularly to the smoke inlet channel 1 or inserted obliquely into the smoke inlet channel 1 against the airflow direction in the smoke inlet channel 1, dust or powdery chemicals in the smoke may be blocked or accumulated near the outlet of the screw conveyor 6, resulting in poor conveying or even complete blockage of the screw conveyor 6. By obliquely inserting along the airflow direction in the smoke inlet channel 1, the blockage of the screw conveyor 6 can be avoided, ensuring smooth conveying.
[0043] In one embodiment, if Figure 1 and Figure 2 As shown, the second outlet 52 is connected to the screw conveyor 6 via the collecting bucket 11 .
[0044] In the above embodiment, the collecting hopper 11 is provided to receive the dust with relatively small particles output from the second outlet 52, and then convey it to the screw conveyor 6, so as to collect the dust in a centralized manner, prevent it from scattering, and provide a transition connection. Specifically, the shape of the collecting hopper 11 is that the diameter of the tube gradually decreases from the end close to the second outlet 52 to the end far from the second outlet 52.
[0045] In one embodiment, if Figure 1 As shown, the dry deacidification system further includes a pneumatic conveying component 12 , the inlet end of the pneumatic conveying component 12 is connected to the outlet end of the discharge pipe 7 , and the outlet end of the pneumatic conveying component 12 is connected to the ash storage 15 .
[0046] In the above embodiment, the dust waste in the discharge pipe 7 is quickly and efficiently transported to the ash storage 15 through the pneumatic conveying component 12 .
[0047] In a specific embodiment, Figure 1 As shown, the pneumatic conveying assembly 12 includes a silo pump 121, a conveying pipe 122 and an air compressor 123. The end of the discharge pipe 7 away from the first outlet 51 is connected to the inlet end of the silo pump 121, the outlet end of the silo pump 121 is connected to the conveying pipe 122, the outlet end of the conveying pipe 122 is connected to the ash bin 15, and the silo pump 121 is connected to the air compressor 123. The air compressor 123 is used to provide airflow to the silo pump 121.
[0048] In the above embodiment, during the operation of the pneumatic conveying component 12, the air compressor 123 is used as the air source. After the dust waste in the discharge pipe 7 enters the silo pump 121, the air compressor 123 inputs high-pressure gas into the silo pump 121 to allow the gas and the dust waste to be fully mixed, so that the dust waste is fluidized, and then the dust waste is transported to the ash bin 15 through the conveying pipe 122 through the high-pressure airflow.
[0049] In one embodiment, if Figure 2 As shown, the second scraper conveyor 5 is further provided with a third outlet 53 , which is located at one end of the second scraper conveyor 5 away from the first outlet 51 , and the third outlet 53 is connected to the ash discharge pipe 13 .
[0050] In the above embodiment, the conveying direction of the second scraper conveyor 5 is from the third outlet 53 to the first outlet 51. A small amount of dust waste will accumulate at the third outlet 53. To avoid a large amount of dust waste accumulation, it is discharged through the ash discharge pipe 13 at the third outlet 53.
[0051] In a specific embodiment, Figure 2 As shown, the dry deacidification system further includes a transfer device 14 , which is used to transfer the waste materials in the ash lowering pipeline 13 to the ash storage 15 .
[0052] In the above embodiment, the transfer device 14 is mainly used to transfer the waste in the ash lowering pipeline 13 to the ash storage 15. Exemplarily, the transfer device 14 can be a scraper conveyor or a transport vehicle.
[0053] In a more specific embodiment, Figure 2 As shown, the transfer device 14 includes a transfer trolley.
[0054] In the above embodiment, the dust waste discharged from the ash discharge pipe 13 is transferred to the ash bin 15 by a transfer vehicle.
[0055] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A dry deacidification system, characterized in that: It includes a smoke inlet channel, a first bag dust collector, a nozzle, a first scraper conveyor, a second scraper conveyor and a screw conveyor, the smoke inlet channel is connected to the dust gas inlet of the first bag dust collector, the nozzle is arranged on the smoke inlet channel, the nozzle is used to spray powdered chemicals into the smoke inlet channel, and the ash discharge port of the first bag dust collector is connected to the feed port of the first scraper conveyor; The second scraper conveyor has a first outlet and a second outlet, the feed port of the second scraper conveyor and the first outlet are respectively located at two ends of the second scraper conveyor, the second outlet is located in the middle of the second scraper conveyor, the discharge port of the first scraper conveyor is connected to the feed port of the second scraper conveyor, the first outlet is connected to a discharge pipe, and the discharge pipe is connected to an ash bin for collecting waste materials, the second outlet is covered with a filter, the second outlet is connected to the feed port of the screw conveyor, and the discharge port of the screw conveyor is connected to the smoke inlet channel.
2. The dry deacidification system according to claim 1, characterized in that: The dry deacidification system also includes a second bag filter and a conveyor connected to the ash discharge port of the second bag filter. The smoke inlet channel is also connected to the dust gas inlet of the second bag filter. The discharge port of the conveyor is connected to the second scraper conveyor, and the discharge port of the conveyor is located between the first outlet and the second outlet.
3. The dry deacidification system according to claim 2, characterized in that: The clean air outlet of the first bag-type dust collector and the clean air outlet of the second bag-type dust collector are both connected to an exhaust passage, and the exhaust passage is connected to the air inlet of the induced draft fan.
4. The dry deacidification system according to claim 1, characterized in that: The discharge port of the screw conveyor is obliquely inserted into the smoke inlet channel along the airflow direction in the smoke inlet channel.
5. The dry deacidification system according to claim 1, characterized in that: The second outlet is connected to the screw conveyor via a collecting bucket.
6. The dry deacidification system according to claim 1, characterized in that: The dry deacidification system further includes a pneumatic conveying component, the inlet end of the pneumatic conveying component is connected to the outlet end of the discharge pipe, and the outlet end of the pneumatic conveying component is connected to the ash bin.
7. The dry deacidification system according to claim 6, characterized in that: The pneumatic conveying assembly includes a silo pump, a conveying pipeline and an air compressor. The end of the discharge pipeline away from the first outlet is connected to the inlet end of the silo pump, the outlet end of the silo pump is connected to the conveying pipeline, the outlet end of the conveying pipeline is connected to the ash bin, the silo pump is connected to the air compressor, and the air compressor is used to provide airflow to the silo pump.
8. The dry deacidification system according to claim 1, characterized in that: The second scraper conveyor is also provided with a third outlet, and the third outlet is located at an end of the second scraper conveyor away from the first outlet, and the third outlet is connected to an ash discharge pipeline.
9. The dry deacidification system according to claim 8, characterized in that: The dry deacidification system further includes a transfer device, which is used to transfer the waste materials in the ash lowering pipeline to the ash storage.
10. The dry deacidification system according to claim 9, characterized in that: The transfer device comprises a transfer trolley.