Pipeline type dry-process deacidification and dust removal device

Abstract

The utility model relates to the technical field of dust removal devices, and provides a pipeline type dry deacidification dust removal device which comprises a device body, an alkaline agent spraying device and a carbon powder spraying device. The device main body is a hollow pipeline, a flue gas inlet communicated with the outside is formed in the bottom of the device main body, and a flue gas outlet communicated with the outside is formed in the top of the device main body; the alkaline agent spraying device is arranged in an inner cavity of the device main body; and the carbon powder spraying device is arranged in the inner cavity of the device main body. According to the pipeline type dry-process deacidification and dust removal device, flue gas is introduced from the bottom of the device main body and discharged from the top of the device main body, the flue gas can be in full contact with an alkaline agent and carbon powder, dust and sodium salt fall off under the action of gravity, and the dust removal and ash removal effects are improved; meanwhile, the whole device is simple in structure and small in occupied area.

Description

Technical Field

[0001] This application relates to the technical field of dust removal devices, and particularly to a pipeline-type dry desulfurization and dust removal device. Background Art

[0002] A large amount of flue gas is generated during the incineration of small domestic waste. The main pollutants in the flue gas include dust, SO2, HCL, NOx, HF, CO, heavy metals, dioxins and other substances.

[0003] When the existing dust removal devices treat these pollutants, the following problems will occur. First, the types of flue gas pollutants are complex, and various process equipment such as dry desulfurization towers and semi-dry desulfurization towers are required for their treatment, and the flue gas pipelines are intricate. Second, the process equipment generally has problems of excessive floor area and installation space, and most of the small domestic waste incineration treatments are located in the factory building.

[0004] Therefore, the existing dust removal devices have problems of complex device, large floor area and poor dust cleaning effect. Utility Model Content

[0005] In view of the above deficiencies of the prior art, the purpose of this application is to provide a pipeline-type dry desulfurization and dust removal device, aiming to solve the problems of complex device, large floor area and poor dust cleaning effect existing in the existing dust removal devices.

[0006] The technical solution adopted by this application to solve the technical problems is as follows: A pipeline-type dry desulfurization and dust removal device includes a device main body, an alkaline reagent injection device and a carbon powder injection device; the device main body is a hollow pipeline, a flue gas inlet communicating with the outside is arranged at the bottom of the device main body, and a flue gas outlet communicating with the outside is arranged at the top of the device main body; the alkaline reagent injection device is arranged in the inner cavity of the device main body; the carbon powder injection device is arranged in the inner cavity of the device main body.

[0007] Optionally, the carbon powder injection device is located above the alkaline reagent injection device; or, the carbon powder injection device is located below the alkaline reagent injection device.

[0008] Optionally, the pipeline-type dry desulfurization and dust removal device further includes a dust cleaning port, and the dust cleaning port is located below the flue gas inlet.

[0009] Optionally, the central axis of the dust cleaning port intersects the central axis of the device main body, and the included angle between the dust cleaning port and the horizontal plane is 70 - 80°.

[0010] Optionally, the pipeline-type dry desulfurization and dust removal device further includes a vibration mechanism, and the vibration mechanism is arranged on the device main body.

[0011] Optionally, the vibration mechanism includes a vibrator and a vibration transfer plate, and the vibrator is connected to the device body through the vibration transfer plate.

[0012] Optionally, the vibration mechanism further includes a support square tube and a reinforcing rib. One end of the support square tube is connected to the device body, and the other end is connected to the vibration transfer plate; the reinforcing rib is located below the vibration transfer plate and is connected to the support square tube.

[0013] Optionally, the duct-type dry desulfurization and dedusting device further includes a flue gas inlet pipe, and the flue gas inlet pipe is connected to the flue gas inlet; a knife gate valve is provided on the flue gas inlet pipe, and the dust cleaning port is located between the knife gate valve and the device body.

[0014] Optionally, the duct-type dry desulfurization and dedusting device further includes a flushing mechanism, and the flushing mechanism is arranged at the top of the device body.

[0015] Optionally, a heat preservation layer is sleeved on the device body, and the thickness of the heat preservation layer is 60 - 120 mm.

[0016] Compared with the prior art, the present application provides a duct-type dry desulfurization and dedusting device. By arranging an alkaline agent spraying device and a carbon powder spraying device in the inner cavity of the device body, the flue gas introduced into the device body is adsorbed and removed. Among them, the alkaline agent sprayed by the alkaline agent spraying device can react with sulfur dioxide, hydrochloric acid, etc. in the flue gas, so as to absorb substances such as sulfur dioxide and hydrochloric acid. The activated carbon sprayed by the carbon powder spraying device can physically adsorb and remove heavy metals and soot in the flue gas, and can also chemically adsorb and remove sulfur dioxide, nitrogen dioxide, etc., so as to remove dust from the flue gas. And the flue gas is introduced from the bottom of the device body and discharged from the top, which can fully contact with the alkaline agent and carbon powder. Dust and sodium salts fall under the action of gravity, improving the dust removal and ash cleaning effects; at the same time, the whole device has a simple structure and a small floor area. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the duct-type dry desulfurization and dedusting device provided by the present application;

[0018] Figure 2 is a schematic connection diagram of the vibration mechanism and the device body provided by the present application;

[0019] Figure 3 is Figure 1 the enlarged schematic diagram at A in

[0020] Description of the Reference Numerals:

[0021] 1. Device main body; 101. Flue gas inlet; 102. Flue gas outlet; 2. Flue gas inlet pipe; 3. Flue gas exhaust pipe; 4. Temperature sensor; 5. Ash cleaning port; 6. Knife gate valve; 7. Alkaline agent injection device; 8. Carbon powder injection device; 9. Vibration mechanism; 10. Flushing mechanism; 12. Thermal insulation layer; 13. Metal protective layer; 901. Vibrator; 902. Vibration transfer plate; 903. Reinforcing rib; 904. Support square pipe; 905. Base plate; 1001. Solenoid valve; 1002. Delivery pipeline; B. Angle between the ash cleaning port and the horizontal plane. Detailed implementation manners

[0022] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0024] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "install", "connect", and "couple" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0025] With reference to Figure 1, in the first embodiment of the present application, a pipeline-type dry desulfurization and dust removal device is provided, including a device main body 1, an alkaline agent spraying device 7, and a carbon powder spraying device 8. Among them, the device main body 1 is a hollow pipeline. A flue gas inlet 101 communicating with the outside is provided at the bottom of the device main body 1, and a flue gas outlet 102 communicating with the outside is provided at the top of the device main body 1; the alkaline agent spraying device 7 is arranged in the inner cavity of the device main body 1; the carbon powder spraying device 8 is arranged in the inner cavity of the device main body 1.

[0026] In the pipeline-type dry desulfurization and dust removal device of this embodiment, by arranging the alkaline agent spraying device 7 and the carbon powder spraying device 8 in the inner cavity of the device main body 1, the flue gas introduced into the device main body 1 is adsorbed and removed. Among them, the alkaline agent sprayed by the alkaline agent spraying device 7 can react with sulfur dioxide, hydrochloric acid, etc. in the flue gas, so as to absorb substances such as sulfur dioxide and hydrochloric acid. The activated carbon sprayed by the carbon powder spraying device 8 can physically adsorb and remove heavy metals and soot in the flue gas, and can also chemically adsorb and remove sulfur dioxide, nitrogen dioxide, etc., so as to remove dust from the flue gas. And the flue gas is introduced from the bottom of the device main body 1 and discharged from the top, which can fully contact with the alkaline agent and carbon powder. Dust and sodium salts fall under the action of gravity, improving the dust removal effect; at the same time, the whole device has a simple structure and a small floor area.

[0027] Among them, the alkaline agent mainly plays a chemical adsorption role and absorbs substances such as sulfur dioxide and hydrochloric acid in the flue gas; the carbon powder can play a physical adsorption role in absorbing heavy metals, soot, and moisture in the flue gas, and can also achieve a chemical adsorption role in adsorbing sulfur dioxide and nitrogen dioxide in the flue gas. The carbon powder is preferably activated carbon powder.

[0028] The alkaline agent can be selected as baking soda or calcium hydroxide. Among them, the injection amount of baking soda corresponding to the unit cross-sectional area / circulation area can be 25-50 kg / h, and the injection amount of calcium hydroxide corresponding to the unit cross-sectional area / circulation area can be 12-25 kg / h.

[0029] The reaction of baking soda absorbing sulfur dioxide is as follows:

[0030] 2Na2HCO3→Na2CO3+H2O+CO2↑;

[0031] When SO2 is in a small amount: Na2CO3+SO2→Na2SO3+CO2↑;

[0032] When SO2 is in excess: Na2CO3+2SO2+H2O→2NaHSO3+CO2↑.

[0033] The reaction of calcium hydroxide absorbing sulfur dioxide is as follows:

[0034] SO2+Ca(OH)2→CaSO3+H2O;

[0035] At high temperatures: 2CaSO3 + O2 → 2CaSO4.

[0036] In some embodiments, the carbon powder injection device 8 is located above the alkaline agent injection device 7; in some embodiments, the carbon powder injection device 8 is located below the alkaline agent injection device 7. Among them, when the carbon powder injection device 8 is located above the alkaline agent injection device 7, the dust cleaning effect is better. After chemically adsorbing the flue gas, the carbon powder can be used to physically and chemically adsorb the flue gas, further improving the dust removal and dust cleaning effects. Specifically, the carbon powder here mainly plays a role in physical adsorption. The injection amount of carbon powder corresponding to the unit cross-sectional area / circulation area is 2.5 - 5 kg / h.

[0037] The alkaline agent injection device 7 can specifically be an alkaline agent spray gun, which is fixedly connected to the inner cavity of the device main body 1 using bolts, and anti-loosening treatment is carried out using spring washers or double nuts; the carbon powder injection device 8 can specifically be a carbon powder spray gun, which is fixedly connected to the inner cavity of the device main body 1 using bolts, and anti-loosening treatment is carried out using spring washers or double nuts.

[0038] In some embodiments, the duct-type dry desulfurization and dust removal device further includes a dust cleaning port 5, and the dust cleaning port 5 is located below the flue gas inlet 101, facilitating the passage of dust and impurities falling from the flue gas inlet 101.

[0039] In some embodiments, the central axis of the dust cleaning port 5 intersects with the central axis of the device main body 1, and the angle B between the dust cleaning port 5 and the horizontal plane is 70 - 80°. The device main body 1 is a vertically arranged hollow pipe. Preferably, the dust cleaning port 5 is located on the left side of the axis of the device main body 1, and the rightmost side of the dust cleaning port 5 coincides with the axis of the device main body 1, facilitating correspondence with the device main body 1 to pass out the dust and impurities falling from the flue gas inlet 101.

[0040] In order to facilitate the removal of dust and impurities adhered to the device main body 1, in some embodiments, the duct-type dry desulfurization and dust removal device further includes a vibration mechanism 9. The vibration mechanism 9 is arranged on the device main body 1, located outside the device main body 1, and is used to drive the device main body 1 to vibrate, thereby shaking off the dust and impurities on the device main body 1. In the working state of the duct-type dry desulfurization and dust removal device, the vibration mechanism 9 vibrates intermittently and briefly, cooperating with the alkaline agent injection device 7 and the carbon powder injection device 8 to remove dust and clean the flue gas, and preventing substances in the flue gas from adsorbing on the device main body 1; while in the non-working state, that is, the cleaning and maintenance state, the vibration mechanism 9 can vibrate continuously and significantly to better shake off the adhered substances, dust, and impurities on the device main body 1 for cleaning. The vibration frequency of the vibration mechanism 9 is generally 1000 - 5000 r / min, and the amplitude is 2 - 4 mm; the optimal vibration frequency is 3000 r / min.

[0041] Combined with referenceFigure 2 In some embodiments, the vibration mechanism 9 includes a vibrator 901 and a vibration transfer plate 902. The vibrator 901 is connected to the device main body 1 through the vibration transfer plate 902. After the vibrator 901 is turned on, its vibration frequency and amplitude are transmitted to the device main body 1 through the vibration transfer plate 902. Specifically, both ends of the vibration transfer plate 902 are respectively connected to the front end and the rear end of the device main body 1, and the vibrator 901 is arranged in the middle of the vibration transfer plate 902, which is convenient for the generation and propagation of vibration.

[0042] In order to enhance the connection stability between the vibration mechanism 9 and the device main body 1, in some embodiments, the vibration mechanism 9 further includes a support square pipe 904. One end of the support square pipe 904 is connected to the device main body 1, and the other end is connected to the vibration transfer plate 902. The vibration mechanism 9 further includes a reinforcing rib 903. The reinforcing rib 903 is located below the vibration transfer plate 902 and is connected to the support square pipe 904. Specifically, the reinforcing rib 903 is attached to the vibration transfer plate 902, which is used to strengthen the connection between the support square pipe 904 and the vibration transfer plate 902, enhance the structural strength of the vibration mechanism 9, and reduce the impact of vibration on the vibration mechanism 9 itself.

[0043] There may be several vibration mechanisms 9, all of which are arranged on the device main body 1 to provide a larger vibration frequency and amplitude. Preferably, there are 1 - 3 vibration mechanisms 9.

[0044] In some embodiments, a backing plate 905 may be provided between the support square pipe 904 and the device main body 1, and is fixedly connected to the device main body 1 through the backing plate 905 to improve the connection tightness between the two.

[0045] In some embodiments, the duct-type dry desulfurization and dedusting device further includes a flue gas inlet pipe 2, and the flue gas inlet pipe 2 is connected to the flue gas inlet 101. A knife gate valve 6 is provided on the flue gas inlet pipe 2, and the dust cleaning port 5 is located between the knife gate valve 6 and the device main body 1. The knife gate valve 6 is used to open and close the flue gas inlet pipe 2 to control whether the incoming flue gas can pass through the flue gas inlet 101 into the device main body 1. Under normal working conditions, the knife gate valve 6 is in the open state, and the incoming flue gas passes through the flue gas inlet pipe 2, enters the device main body 1 through the flue gas inlet 101, then chemically reacts and adsorbs with the alkaline agent sprayed by the alkaline agent spraying device 7, and after physically adsorbing with the carbon powder sprayed by the carbon powder spraying device 8, it passes out through the flue gas outlet 102, and the dust, impurities in the flue gas and the impurities generated by chemical and physical adsorption fall into the dust cleaning port 5.

[0046] Among them, the dust cleaning port 5 is arranged on the flue gas inlet pipe 2, between the knife gate valve 6 and the device main body 1. Whether the knife gate valve 6 is open or closed, the dust and impurities on the device main body 1 can fall through the dust cleaning port 5. And preferably, the ratio of the diameter of the dust cleaning port 5 to the diameter of the flue gas inlet pipe 2 is 1:(2 - 2.5).

[0047] A temperature sensor 4 may also be provided on the flue gas inlet pipe 2 for detecting the temperature of the incoming flue gas. Specifically, the temperature sensor 4 is provided at one end of the flue gas inlet pipe 2, and the knife gate valve 6 is located between the temperature sensor 4 and the dust cleaning port 5; regardless of whether the knife gate valve 6 is open or closed, the temperature of the flue gas in the flue gas inlet pipe 2 can be detected.

[0048] In some embodiments, the duct-type dry desulfurization and dust removal device further includes a flue gas exhaust pipe 3, and the flue gas exhaust pipe 3 is connected to the flue gas outlet 102 of the device main body 1 for communicating the flue gas discharged from the device main body 1 with the outside.

[0049] In some embodiments, the duct-type dry desulfurization and dust removal device further includes a flushing mechanism 10, and the flushing mechanism 10 is provided on the top of the device main body 1. The flushing mechanism 10 is used to wash the adhesion on the side wall of the device main body 1 and the nozzles of the alkaline agent spraying device 7 and the carbon powder spraying device 8, prevent the nozzles of the alkaline agent spraying device 7 and the carbon powder spraying device 8 from being blocked, and has a cleaning effect. Specifically, when the knife gate valve 6 and the dust cleaning port 5 are in the closed state, opening the flushing mechanism 10 can play a good cleaning role in the inner cavity of the device main body 1. The flushing mechanism 10 can be soft-connected to the device main body 1 to reduce the influence of the vibration of the vibration mechanism 9 on the flushing mechanism 10.

[0050] In some embodiments, the flushing mechanism 10 includes a solenoid valve 1001 and a delivery pipeline 1002. The delivery pipeline 1002 is connected to the top of the device main body 1 in a through manner, and the injection of air or cleaning liquid is controlled by the opening and closing of the solenoid valve 1001; specifically, the flushing mechanism 10 can be provided with 4 groups and is evenly distributed along the circumferential direction of the device main body 1 to flush the inner cavity of the device main body 1 without dead angles in all directions.

[0051] Combined with reference Figure 1 and Figure 3 , in some embodiments, a heat preservation layer 12 is sleeved outside the device main body 1. The heat preservation layer 12 is used to maintain the flue gas temperature, so as to more fully contact and react with the alkaline agent, and reduce the noise generated by the device main body 1; the thickness of the heat preservation layer 12 can be 60 - 120 mm, and it is optimal when the thickness of the heat preservation layer 12 is between 80 - 100 mm. The material of the heat preservation layer 12 can be selected from asbestos, aluminum silicate fiber, rock wool, etc.

[0052] A metal protection layer 13 may also be sleeved on the heat preservation layer 12. The metal protection layer 13 is used to effectively protect the heat preservation layer 12 and beautify the appearance. The thickness of the metal protection layer 13 is optimal between 1.5 - 3 mm. The material of the metal protection layer 13 can be selected from stainless steel, galvanized copper plate.

[0053] In summary, the present application provides a pipeline dry desulfurization and dust removal device. By arranging an alkaline agent spraying device and a carbon powder spraying device in the inner cavity of the device main body, the flue gas introduced into the device main body is adsorbed and removed. Among them, the alkaline agent sprayed by the alkaline agent spraying device can react with sulfur dioxide, hydrochloric acid, etc. in the flue gas, thereby absorbing substances such as sulfur dioxide and hydrochloric acid. The activated carbon sprayed by the carbon powder spraying device can physically adsorb and remove heavy metals and soot in the flue gas, and can also chemically adsorb and remove sulfur dioxide, nitrogen dioxide, etc., thereby removing dust from the flue gas. And the flue gas is introduced from the bottom of the device main body and discharged from the top, which can fully contact with the alkaline agent and carbon powder. Dust and sodium salts fall under the action of gravity, improving the dust removal and ash cleaning effects; at the same time, the whole device has a simple structure and a small floor area.

[0054] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the examples of the present application.

Claims

1. A pipeline-type dry acid removal and dust removal device, characterized in that, It includes a device main body, an alkaline agent injection device, and a carbon powder injection device; the device main body is a hollow pipe, a flue gas inlet communicating with the outside is arranged at the bottom of the device main body, and a flue gas outlet communicating with the outside is arranged at the top of the device main body; The alkaline agent injection device is arranged in the inner cavity of the device main body; The carbon powder injection device is arranged in the inner cavity of the device main body.

2. The duct-type dry desulfurization and dust removal device according to claim 1, characterized in that, The carbon powder injection device is located above the alkaline agent injection device; or, The carbon powder injection device is located below the alkaline agent injection device.

3. The duct-type dry acid removal and dust removal device according to claim 1, wherein, The duct-type dry desulfurization and dust removal device further includes a dust cleaning port, and the dust cleaning port is located below the flue gas inlet.

4. The duct-type dry acid removal and dust removal device according to claim 3, wherein, The central axis of the dust cleaning port intersects with the central axis of the device main body, and the included angle between the dust cleaning port and the horizontal plane is 70 - 80°.

5. The duct-type dry acid removal and dust removal device according to claim 1, characterized in that, The duct-type dry desulfurization and dust removal device further includes a vibration mechanism, and the vibration mechanism is arranged on the device main body.

6. The duct-type dry acid removal and dust removal device according to claim 5, characterized in that, The vibration mechanism includes a vibrator and a vibration transfer plate, and the vibrator is connected to the device main body through the vibration transfer plate.

7. The duct-type dry acid removal and dust removal device according to claim 6, characterized in that, The vibration mechanism further includes a support square pipe and a reinforcing rib. One end of the support square pipe is connected to the device main body, and the other end is connected to the vibration transfer plate; the reinforcing rib is located below the vibration transfer plate and is connected to the support square pipe.

8. The duct-type dry acid removal and dust removal device according to claim 3, characterized in that, The duct-type dry desulfurization and dust removal device further includes a flue gas inlet pipe, and the flue gas inlet pipe is connected to the flue gas inlet; a knife gate valve is arranged on the flue gas inlet pipe, and the dust cleaning port is located between the knife gate valve and the device main body.

9. The duct-type dry acid removal and dust removal device according to claim 1, characterized in that, The duct-type dry desulfurization and dust removal device further includes a flushing mechanism, and the flushing mechanism is arranged at the top of the device main body.

10. The duct-type dry acid removal and dust removal device according to claim 1, wherein A heat preservation layer is sleeved on the device main body, and the thickness of the heat preservation layer is 60 - 120 mm.

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