Suspension type denitration pre-dedusting device

Abstract

The utility model relates to a suspension type denitration pre-dedusting device which comprises a gravity pre-dedusting chamber, a diversion channel and a denitration tower, and the diversion channel is butted between the gravity pre-dedusting chamber and the denitration tower; a pre-dedusting ash hopper is arranged at the vertically downward part of the gravity pre-dedusting chamber, the flow guide channel is in butt joint with the side edge of the gravity pre-dedusting chamber, a metal interception filter screen is arranged at the position, close to the flow guide channel, of the gravity pre-dedusting chamber, and a blowing channel is movably arranged on the inner edge of the end, close to the gravity pre-dedusting chamber, of the flow guide channel. According to the suspension type denitration pre-dedusting device, compressed air is instantaneously released into huge airflow through the pulse valve and the air bag, the airflow is blown to the metal intercepting filter screen through the nozzle, the metal intercepting filter screen swings in a reciprocating mode under the action of the guide column and the spring, the metal intercepting filter screen vibrates during reciprocating swinging, and the dust is removed. The collected dust on the metal intercepting filter screen is forced to be stripped from the surface of the metal intercepting filter screen under the reaction of the rapping force, so that the dust cleaning effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of denitration pre-dedusting, and particularly relates to a suspension type denitration pre-dedusting device. BACKGROUND

[0002] The high-temperature flue gas of a biomass boiler contains a large amount of wood ash, which is rich in alkaline metals and has a significant toxic and corrosive effect on a denitration catalyst, so that it is difficult to ensure long-term and efficient operation of the denitration device; therefore, it is particularly important to reduce the dust content of the flue gas at the inlet of the biomass boiler denitration device, and thus pre-dedusting treatment is generally performed at the front end of the denitration device; the conventional high-temperature electric dedusting or bag dedusting treatment device has the problems of high one-time investment cost, high operation cost, and high maintenance cost.

[0003] In view of this, the suspension type denitration pre-dedusting device is provided. SUMMARY

[0004] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the following technical problems in the prior art: the high-temperature flue gas of a biomass boiler contains a large amount of wood ash, which is rich in alkaline metals and has a significant toxic and corrosive effect on a denitration catalyst, so that it is difficult to ensure long-term and efficient operation of the denitration device; therefore, it is particularly important to reduce the dust content of the flue gas at the inlet of the biomass boiler denitration device, and thus pre-dedusting treatment is generally performed at the front end of the denitration device; the conventional high-temperature electric dedusting or bag dedusting treatment device has the problems of high one-time investment cost, high operation cost, and high maintenance cost.

[0006] To solve the above technical problems, the utility model provides the following technical scheme: a suspension type denitration pre-dedusting device, comprising a gravity pre-dedusting chamber, a flow guide channel and a denitration tower, the flow guide channel is connected between the gravity pre-dedusting chamber and the denitration tower;

[0007] A pre-dedusting ash bucket is arranged at the vertically downward part of the gravity pre-dedusting chamber, the flow guide channel is connected to the side position of the gravity pre-dedusting chamber, a metal interception screen is arranged at the position close to the flow guide channel of the gravity pre-dedusting chamber, and a spraying channel is movably arranged in one end of the flow guide channel close to the gravity pre-dedusting chamber;

[0008] The upper end of the metal interception filter screen is fixedly provided with an ear, and the lower end of the metal interception filter screen is fixedly provided with a threaded guide rod.

[0009] The upper end of the blowing channel is provided with a rotating shaft, which is hingedly connected to the inner edge of the flow guide channel, the lower end of the blowing channel is provided with an adapter pipe, and one end of the adapter pipe penetrating through the flow guide channel is movably provided with a pulse valve.

[0010] The inner edge of the gravity pre-dust removal chamber is provided with a plurality of flow guide plates, which can increase the collision of flue gas dust, help the separation of particulate matter, and also promote the uniform flow of flue gas to the flow guide channel.

[0011] As a preferred technical scheme of the suspension type denitration pre-dust removal device, a guide groove is formed in the mounting seat, a guide column is fixedly installed at the inner edge of the guide groove, a guide sleeve is slidably connected outside the guide column, a spring is arranged between the inner edge of the guide groove and the guide sleeve, the spring surrounds the outside of the guide column, the guide sleeve is fixedly connected with the mounting hook, and when the metal interception filter screen is blown, the metal interception filter screen can reciprocatingly stretch and contract under the cooperation of the guide column and the spring.

[0012] As a preferred technical scheme of the suspension type denitration pre-dust removal device, a sealing plate one is arranged below the mounting seat of the gravity pre-dust removal chamber, a long slot is formed in the sealing plate one for the extension and contraction of the ear and installation, and under the action of the sealing plate one, the sealing effect and auxiliary vibration effect of the extension and contraction of the metal interception filter screen are facilitated.

[0013] As a preferred technical scheme of the suspension type denitration pre-dust removal device, a sealing plate two is arranged at the inner edge of the metal interception filter screen, a long hole is formed in the sealing plate two, and the threaded guide rod penetrates through and extends out of the long hole, and a nut is connected to one end of the threaded guide rod extending out of the long hole, so that the metal interception filter screen can be prevented from completely falling off the sealing plate two.

[0014] As a preferred technical scheme of the suspension type denitration pre-dust removal device, the input end of the pulse valve is connected with a gas bag, and one end of the rotating shaft extending out of the flow guide channel is provided with a rotating seat, which facilitates the rotation control of the blowing channel under the action of the rotating seat, and the gas in the gas bag can be injected into the blowing channel under the action of the pulse valve.

[0015] As a kind of preferred technical scheme of the suspension type denitration pre-dust removal device, the outer periphery of the injection channel is provided with a nozzle, and the output position of the nozzle is provided with a metal protective net.

[0016] The utility model discloses beneficial effect:

[0017] 1, this suspension type denitration pre-dust removal device will compressed air be released by pulse valve and air bag instantaneously Huge airflow, airflow blows on metal intercepting filter screen through nozzle, under the action of guide column and spring, metal intercepting filter screen reciprocating swing occurs, and the dusting force of metal intercepting filter screen is forced to peel off from the surface of metal intercepting filter screen, so that dust removal effect is achieved;

[0018] 2, this suspension type denitration pre-dust removal device is set to semicircle by the injection channel, in its non-working state, the nozzle can be avoided directly with flue gas contact, can play dustproof protection function to it;

[0019] 3, by pre-dust removal device, a part of dust in the biomass boiler flue gas can be intercepted quickly, the dust rich in alkali metal in flue gas is greatly reduced to poison the rear end denitration device, prolongs the service life of biomass boiler denitration device, and positively plays a role to the stable operation of denitration device.

[0020] Other features and advantages of the utility model will be described in the subsequent specification, and, part becomes obvious from the specification, or is understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structure specially pointed out in the specification and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without paying creative labor. Wherein:

[0022] Figure 1 It is the overall structure schematic diagram of the utility model.

[0023] Figure 2 It is the sectional view schematic diagram of the gravity pre-dust removal chamber of the utility model.

[0024] Figure 3 It is the Figure 2 schematic diagram of A place in the utility model.

[0025] Figure 4 It is the Figure 2Schematic view at B.

[0026] Figure 5 Schematic view of the blowing channel structure of the utility model.

[0027] Reference signs:

[0028] 100, gravity pre-dedusting chamber; 101, deflector; 200, deflection channel; 300, denitration tower; 400, pre-dedusting ash bucket; 500, metal interception filter screen; 501, hanging ear; 502, mounting hook; 503, mounting seat; 504, guide groove; 505, guide column; 506, spring; 507, guide sleeve; 508, sealing plate one; 509, threaded guide rod; 510, sealing plate two; 511, long hole; 600, blowing channel; 601, rotating shaft; 602, adapter pipe; 603, pulse valve; 604, gas pocket; 605, rotating seat; 606, nozzle; 607, metal protection net. DETAILED DESCRIPTION

[0029] In order to make the above objects, features and advantages of the utility model more apparent, below, specific embodiments of the utility model are described in detail in conjunction with the drawings of the specification.

[0030] In the following description, a lot of specific details are set forth in order to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from the description, and those skilled in the art can make similar generalization without departing from the connotation of the utility model, therefore the utility model is not limited by the specific embodiments disclosed below.

[0031] Secondly, the "one embodiment" or "embodiment" referred to here means that specific features, structures or characteristics can be contained in at least one implementation of the utility model. "In one embodiment" does not mean the same embodiment in different places in the specification, nor is it an embodiment that is independent of or mutually exclusive with other embodiments.

[0032] Thirdly, the utility model is described in detail in conjunction with the schematic view, and when the embodiments of the utility model are described in detail, for the convenience of description, the sectional view showing the structure of the device will be partially enlarged without the general proportion, and the schematic view is only an example, which should not limit the scope of protection of the utility model here. In addition, three-dimensional spatial dimensions including length, width and depth should be contained in actual manufacture.

[0033] Embodiment, refer to Figure 1 and 2The utility model provides a kind of suspended denitration pre-dedusting device, including gravity pre-dedusting chamber 100, guide channel 200 and denitration tower 300, guide channel 200 is docked between gravity pre-dedusting chamber 100 and denitration tower 300;Gravity pre-dedusting chamber 100 is equipped with pre-dedusting ash bucket 400 in vertically downward part, guide channel 200 is docked in side position of gravity pre-dedusting chamber 100, gravity pre-dedusting chamber 100 is configured with metal intercepting screen 500 close to the position of guide channel 200, and the end of guide channel 200 close to gravity pre-dedusting chamber 100 is movably configured with injection channel 600 inside;Gravity pre-dedusting chamber 100 is provided with multiple guide plates 101 inside, and the guide plates 101 can increase the collision of flue gas dust, help particulate matter separation, and also promote flue gas to flow uniformly to the direction of guide channel 200.

[0034] Referring to Figure 2 、 3 And 4, the upper end of metal intercepting screen 500 is fixedly installed with lug 501, and the lower end of metal intercepting screen 500 is fixedly installed with threaded guide rod 509;Mounting seat 503 is installed at the inner edge position close to metal intercepting screen 500 of gravity pre-dedusting chamber 100, mounting hook 502 is slidably arranged on the lower surface of mounting seat 503, and mounting hook 502 is installed with lug 501;Guide groove 504 is formed in mounting seat 503, guide column 505 is fixedly installed at the inner edge of guide groove 504, guide sleeve 507 is slidably connected outside guide column 505, spring 506 is arranged between the inner edge of guide groove 504 and guide sleeve 507, spring 506 surrounds the outside of guide column 505, guide sleeve 507 is fixedly connected with mounting hook 502, metal intercepting screen 500 can reciprocatingly stretch and contract under the cooperation of guide column 505 and spring 506 when being blown, metal intercepting screen 500 is vibrated when colliding with sealing plate two 510 and mounting seat 503 during reciprocating swing, and the dust collected on metal intercepting screen 500 is forced to peel off from the surface of metal intercepting screen 500 under the action of reaction force, so that the dust removal effect is achieved;Sealing plate one 508 is arranged below mounting seat 503 close to gravity pre-dedusting chamber 100, long slot is formed in sealing plate one 508 for the expansion and contraction movement and installation of lug 501, and the sealing effect and auxiliary vibration effect of metal intercepting screen 500 during expansion and contraction movement are facilitated under the action of sealing plate one 508;Sealing plate two 510 is arranged at the inner edge position close to metal intercepting screen 500 of pre-dedusting ash bucket 400, long hole 511 is formed in sealing plate two 510, threaded guide rod 509 penetrates and extends out of long hole 511, and nut is docked outside the end of threaded guide rod 509 extending out of long hole 511, so that metal intercepting screen 500 can be prevented from completely falling off from sealing plate two 510.

[0035] Referring to Figure 2 And 5The upper end of the blowing channel 600 is provided with a rotating shaft 601 which is hingedly connected to the inner edge of the flow guide channel 200, the lower end of the blowing channel 600 is provided with an adapter pipe 602, the adapter pipe 602 is movably provided with a pulse valve 603 at one end of the flow guide channel 200, the pulse valve 603 is G2, 220v; the input end of the pulse valve 603 is connected to a gas pocket 604, the end of the rotating shaft 601 extending out of the flow guide channel 200 is provided with a rotating seat 605, under the action of the rotating seat 605, the blowing channel 600 is conveniently controlled to rotate, under the action of the pulse valve 603, the gas in the gas pocket 604 can be injected into the blowing channel 600; the outer periphery of the blowing channel 600 is provided with a nozzle 606, and the output position of the nozzle 606 is provided with a metal protective net 607.

[0036] Through the present embodiment, when the flue gas enters the gravity pre-dedusting chamber 100, under the action of the flow guide plate 101, the flue gas flow collides with the wall plate of the flow guide plate 101, and the particulate matters in the flue gas are separated and slide into the pre-dedusting ash hopper 400 due to the action of inertial collision; the windward surface part of the flow guide plate 101 is made of wear-resistant alloy 16Mn material, which increases the wear resistance and erosion of the wall part of the flow guide plate 101 and prolongs the service life of the flow guide plate 101.

[0037] The metal interception filter screen 500 can block the dust in the flue gas; after a long time of filtration, when the metal interception filter screen 500 is bonded with dust, compressed air is instantaneously released through the pulse valve 603 and the gas pocket 604 to generate a large airflow, the airflow blows on the metal interception filter screen 500 through the nozzle 606, under the action of the guide column 505 and the spring 506, the metal interception filter screen 500 reciprocally swings, the metal interception filter screen 500 is vibrated when reciprocally swinging, and the dust collected on the metal interception filter screen 500 is forced to be stripped from the surface of the metal interception filter screen 500 under the action of the vibration force, so that the dust removal effect is achieved; under the action of the rotating shaft 601, when the blowing channel 600 does not act on the metal interception filter screen 500, the opening of the nozzle 606 of the blowing channel 600 can face the inner edge of the flow guide channel 200, which avoids dust from entering the nozzle 606 and prolongs the service life of the nozzle 606.

[0038] The metal interception filter screen 500 is made by one-time punching process, which ensures that the sizes of the filter holes on the metal interception filter screen 500 are uniform.

[0039] It should be understood that, in the development of any actual implementation, numerous implementation decisions can be made in any engineering or design project. Such development efforts, which might be complex and time-consuming, would nevertheless be of a routine nature of design, manufacture, and production for those of ordinary skill having the benefit of this disclosure.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A suspended denitrification and pre-dust removal device, characterized in that: It includes a gravity pre-dust removal chamber (100), a flow guide channel (200), and a denitrification tower (300), wherein the flow guide channel (200) is connected between the gravity pre-dust removal chamber (100) and the denitrification tower (300); A pre-dust hopper (400) is installed in the vertically downward part of the gravity pre-dust removal chamber (100). The guide channel (200) is connected to the side of the gravity pre-dust removal chamber (100). A metal interception filter (500) is arranged in the gravity pre-dust removal chamber (100) near the guide channel (200). A jetting channel (600) is movably arranged along the inner edge of the guide channel (200) near the gravity pre-dust removal chamber (100). The upper end of the metal interception filter (500) is fixedly installed with a hanging ear (501), and the lower end of the metal interception filter (500) is fixedly installed with a threaded guide rod (509). The gravity pre-dust removal chamber (100) is equipped with a mounting base (503) near the inner edge of the metal interception filter (500). The mounting base (503) is slidably equipped with a mounting hook (502) on its lower surface. The mounting hook (502) is installed with the hanging ear (501). The upper end of the blowing channel (600) is provided with a rotating shaft (601), wherein the rotating shaft (601) is hinged to the inner edge of the guide channel (200), and the lower end of the blowing channel (600) is provided with a connecting pipe (602), wherein a pulse valve (603) is movably provided at one end of the connecting pipe (602) that passes through the guide channel (200). Multiple guide plates (101) are provided along the inner edge of the gravity pre-dust removal chamber (100).

2. The suspended denitrification and pre-dust removal device according to claim 1, characterized in that: The mounting base (503) has a guide groove (504), and a guide post (505) is fixedly installed on the inner edge of the guide groove (504). A guide sleeve (507) is slidably connected to the outside of the guide post (505). A spring (506) is provided between the guide sleeve (507) and the inner edge of the guide groove (504). The spring (506) surrounds the outside of the guide post (505). The guide sleeve (507) is fixedly connected to the mounting hook (502).

3. The suspended denitrification and pre-dust removal device according to claim 1, characterized in that: The gravity pre-dust removal chamber (100) is equipped with a sealing plate (508) below the mounting base (503). The sealing plate (508) has a long slot for the extension and retraction of the hanging ear (501) and for installation.

4. The suspended denitrification and pre-dust removal device according to claim 1, characterized in that: The pre-dust hopper (400) is equipped with a sealing plate two (510) near the inner edge of the metal interception filter (500). The sealing plate two (510) has an elongated hole (511) and the threaded guide rod (509) extends through the elongated hole (511).

5. The suspended denitrification and pre-dust removal device according to claim 1, characterized in that: The input end of the pulse valve (603) is connected to an air bag (604), and the end of the rotating shaft (601) extending out of the guide channel (200) is equipped with a rotating seat (605).

6. The suspended denitrification and pre-dust removal device according to claim 1, characterized in that: A nozzle (606) is installed on the outer periphery of the blowing channel (600), and a metal protective mesh (607) is installed at the output position of the nozzle (606).

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