Distributor and distribution pipeline for flue gas dry desulfurization and denitrification

Abstract

The utility model belongs to the technical field of flue gas desulfurization and denitrification, and particularly relates to a distributor and a distribution pipeline for flue gas dry desulfurization and denitrification. The small-diameter end of the reducer pipe is a feeding end, and the large-diameter end of the reducer pipe is a discharging end; the distribution cover covers the large-diameter end of the reducer pipe; wherein a plurality of outlet branch pipes are arranged on the distribution cover; a flow guide cone is arranged in the middle of the inner side of the distribution cover and used for guiding materials entering from the small-diameter end of the reducer pipe to the outlet branch pipe. The flow guide cone is arranged in the middle of the inner side of the distribution cover of the distributor and can be used for guiding materials entering from the small-diameter end of the reducer pipe to the outlet branch pipe, so that the problems of scaling blockage and abrasion caused by turbulent flow of powder / air entering the cavity of the distributor are solved, normal and stable operation of a dry desulfurization and denitrification system can be ensured, and the service life of the distributor is prolonged. The normal environmental protection index of factory production is powerfully guaranteed, and a technical guarantee is provided for the gradual maturity of a dry desulfurization and denitrification integrated technology.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas desulfurization and denitrification, and specifically relates to a distributor and a distribution pipeline for flue gas dry desulfurization and denitrification. Background Art

[0002] At present, ultra-low emissions of flue gas pollutants have become a trend. As a new technology that has emerged to meet the demand for deep flue gas emissions, the integrated dry denitrification and desulfurization technology has been widely used in waste incineration power, cement, papermaking and other industries. It has the advantages of simple process, flexible space layout, low investment, no harmful by-products, and good desulfurization and denitrification effects.

[0003] Existing flue gas dry desulfurization agents / denitrification agents are mostly in granular or powder form, and are evenly dispersed and sprayed into the high-temperature furnace of the boiler by pneumatic conveying. The existing technology generally uses a simple distributor that divides a main pipe into multiple branch pipes. In actual operation, there are pain points such as distributor blockage and severe wear, which affects the stable operation of the system, further affects the environmental monitoring indicators and increases the production and operation pressure of the enterprise. Utility Model Content

[0004] The utility model aims to provide a distributor and a distribution pipeline for flue gas dry desulfurization and denitrification, so as to solve the technical problem that the existing distribution pipeline is prone to blockage.

[0005] In order to solve the above technical problems, the utility model provides a dispenser, comprising:

[0006] The reducer has a small diameter end as the feed end and a large diameter end as the discharge end;

[0007] A distribution cover is arranged on the large diameter end of the reducer; wherein

[0008] The distribution cover is provided with a plurality of outlet branches; and

[0009] A guide cone is arranged at the middle part of the inner side of the distribution cover, which is used to guide the material entering from the small diameter end of the reducer to the outlet branch pipe.

[0010] In one embodiment of the present application, the guide cone is formed by an inward depression in the middle portion of a hemispherical distribution cover.

[0011] In one embodiment of the present application, the dispensing cover comprises:

[0012] A first circular arc plate connected to the large diameter end of the reducer; and

[0013] The second circular arc plate is located on the inner side of the first circular arc plate and connected to the first circular arc plate and the guide cone.

[0014] In one embodiment of the present application, the top angle of the guide cone is 30° to 100°.

[0015] In one embodiment of the present application, the conical surface of the guide cone and the axis of the reducer form a first angle α1, and the outlet branch pipe and the axis of the reducer form a second angle α2; wherein

[0016] The first angle α1 and the second angle α2 tend to be equal.

[0017] Accordingly, the present application also provides a distribution pipeline for flue gas dry desulfurization and denitrification, comprising:

[0018] Transport main pipe;

[0019] A plurality of conveying sub-pipes arranged at intervals; the feed end of each conveying sub-pipe is connected to the conveying main pipe, and the discharge end is connected to the distributor as described above; and

[0020] A discharge pipe is connected to each outlet branch pipe of the distributor, and a first ball valve is arranged on the discharge pipe.

[0021] In one embodiment of the present application, the discharge end of the conveying sub-pipe is connected to the small-diameter end of the reducer through a conveying elbow.

[0022] In one embodiment of the present application, the included angle β between the axes of the transport sub-pipe and the transport main pipe is 20° to 60°.

[0023] In one embodiment of the present application, a second ball valve is provided on the delivery sub-pipe.

[0024] In one embodiment of the present application, a blowing-assisting pipe is provided on the conveying sub-pipe.

[0025] The beneficial effect of the utility model is that a guide cone is arranged in the middle part of the inner side of the distribution cover of the distributor of the utility model, which can be used to guide the material entering from the small diameter end of the reducer to the outlet branch pipe, thereby solving the pain point problems of scaling, blockage and wear caused by turbulence of powder / air entering the distributor cavity, and can ensure the normal and stable operation of the dry desulfurization and denitrification system, effectively guarantee the normal environmental protection indicators of the factory production, and also provide technical guarantee for the gradual maturity of the integrated technology of dry desulfurization and denitrification.

[0026] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 is a schematic diagram of a preferred embodiment of the dispenser of the utility model;

[0030] Figure 2 yes Figure 1 Schematic diagram of the middle A direction;

[0031] Figure 3 It is an angle schematic diagram of the dispenser of the utility model;

[0032] Figure 4 It is a schematic diagram of a preferred embodiment of the distribution pipeline for dry flue gas desulfurization and denitrification of the utility model.

[0033] In the figure:

[0034] Distributor 1, reducer 11, small diameter end 111, large diameter end 112, distribution cover 12, guide cone 121, first circular arc plate 122, second circular arc plate 123, outlet branch pipe 13, conveying mother pipe 2, conveying sub-pipe 3, discharge pipe 4, first ball valve 5, conveying elbow 6, second ball valve 7, blowing-assisting pipe 8. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described 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.

[0036] Professional terms and explanations:

[0037] Integrated dry denitrification and desulfurization technology: dry denitrification agent / desulfurization agent is added into the feeding bin, and enters the buffer bin of the weighing feeding device through the discharge valve, and then the dry denitrification agent / desulfurization agent is quantitatively fed to the Venturi acceleration chamber through the variable frequency screw feeder. The conveying gas generated by the Roots blower blows the granular or powdered denitrification agent / desulfurization agent to the powder distributors on each layer of the boiler side. After distribution, it is transported to each spray gun respectively, and finally evenly sprayed into the high temperature area of ​​750-1050℃, so that the denitrification agent / desulfurization agent is cracked at high temperature and reacts with the NOx / SO2 in the flue gas to reduce the NOx concentration / SO2 concentration in the flue gas to meet the relevant emission standards.

[0038] Existing flue gas dry desulfurization agents / denitrification agents are mostly in granular or powder form, and are pneumatically conveyed to evenly disperse the agents and spray them into the high-temperature furnace of the boiler. The industry generally uses a simple distributor that divides a main pipe into multiple branch pipes. In actual operation, there are pain points such as blockage and severe wear at the main pipe distribution point, which affects the stable operation of the system, and further affects the environmental monitoring indicators and increases the production and operation pressure of the enterprise.

[0039] Based on this, see Figure 1 and Figure 2 In one embodiment of the present application, the distributor includes: a reducer 11, whose small diameter end 111 is a feed end and whose large diameter end 112 is a discharge end; a distribution cover 12, which is arranged on the large diameter end 112 of the reducer 11; wherein a plurality of outlet branches 13 are arranged on the distribution cover 12; and a guide cone 121 is arranged in the middle part of the inner side of the distribution cover 12, which is used to guide the material entering from the small diameter end 111 of the reducer 11 to the outlet branch 13.

[0040] In this embodiment, the connection parts between the plurality of outlet branch pipes 13 and the distribution cover 12 may be distributed in a circular array around the circumference of the guide cone 121 .

[0041] In this embodiment, the material enters the reducer 11 from the small diameter end 111 and is discharged from the large diameter end 112. Due to the guidance of the guide cone 121 in the middle of the distribution cover 12, the conical surface can guide the material to the inlets of the multiple outlet branches 13 on the distribution cover 12.

[0042] In this embodiment, optionally, the guide cone 121 is formed by an inward depression in the middle of the hemispherical distribution cover 12 .

[0043] Specifically, the distribution cover 12 includes: a first circular arc plate 122 connected to the large diameter end 112 of the reducer 11 ; and a second circular arc plate 123 located inside the first circular arc plate 122 and connected to the first circular arc plate 122 and the guide cone 121 .

[0044] In this embodiment, the distribution hood 12 adopts a unique structure that combines a guide cone 121 with a circular arc plate; the guide cone 121 and the circular arc plate can evenly disperse and distribute the powder, avoiding scaling, blockage and wear problems caused by turbulence of powder / air entering the distributor cavity; optionally, the bottom of the cone of the guide cone 121 can also adopt an arc plate.

[0045] Preferably, the top angle of the guide cone 121 is 30° to 100°.

[0046] See also Figure 3 Preferably, the conical surface of the guide cone 121 forms a first angle α1 with the axis of the reducer 11, and the outlet branch pipe 13 forms a second angle α2 with the axis of the reducer 11; wherein the first angle α1 and the second angle α2 tend to be equal.

[0047] In this embodiment, the outlet branch pipe 13 and the guide cone 121 have a conical surface inclination angle that is as consistent as possible, which results in good material diversion and dispersion effects. Of course, small angle adjustments can be made based on actual conditions.

[0048] See also Figure 4 On the basis of the above embodiments, an embodiment of the present application further provides a distribution pipeline for dry desulfurization and denitrification of flue gas, comprising: a conveying main pipe 2; a plurality of conveying sub-pipes 3 arranged at intervals; the feed end of each conveying sub-pipe 3 is connected to the conveying main pipe 2, and the discharge end is connected to the distributor 1 as described above; and a discharge pipe 4 connected to each outlet branch pipe 13 of the distributor 1, and a first ball valve 5 is provided on the discharge pipe 4, and the discharge pipe 4 can be used to connect to the hose of the agent spray gun; the first ball valve 5 can be manual, electric, or pneumatic.

[0049] Specifically, the discharge end of the conveying sub-pipe 3 is connected to the small diameter end 111 of the reducer 11 through the conveying elbow 6; optionally, the conveying elbow 6 can be connected to the reducer 11 in the form of a flange, quick connection, etc., for easy maintenance.

[0050] In this embodiment, optionally, the axial angle β between the conveying sub-pipe 3 and the conveying main pipe 2 is 20° to 60°; within this angle, material transportation is convenient.

[0051] Optionally, a second ball valve 7 is provided on the delivery sub-pipe 3; the second ball valve 7 may be manual, electric or pneumatic.

[0052] Preferably, a blowing-assisting pipe 8 is provided on the conveying sub-pipe 3; the axis of the blowing-assisting pipe 8 may be directed toward the distributor 1, so as to facilitate online cleaning of blockages.

[0053] In this embodiment, the conveying mother pipe 2 can be a seamless carbon steel pipe; the conveying sub-pipe 3 can be a stainless steel seamless conveying tee inclined pipe or a seamless carbon steel pipe; the conveying elbow 6 can be a stainless steel seamless conveying elbow or a seamless carbon steel pipe; the material of the distributor 1 can be stainless steel thick-walled plate / pipe, wear-resistant carbon steel plate / pipe, or steel plate / pipe with inner lining ceramic coating and other wear-resistant materials; the number of outlet branch pipes 13 can be 3-12; the conveying sub-pipe 3 can be three with different heights, or one to five can be set according to the boiler furnace type and temperature field requirements;.

[0054] In a specific application scenario, see Figure 1 , Figure 2 and Figure 4 , three conveying sub-pipes 3 can be provided, which are arranged in the first layer, the second layer and the third layer from bottom to top in order according to the height, corresponding to the corresponding flue gas temperature range inside the boiler furnace respectively; the dry desulfurizer / denitrifier enters the conveying main pipe 2 by pneumatic conveying, and selects the corresponding first-layer distribution pipe / second-layer distribution pipe / third-layer distribution pipe according to the flue gas temperature range inside the boiler furnace, and enters the conveying sub-pipe 3 in turn, opens the second ball valve 7, and the powder enters the distributor 1, enters the outlet branch pipe 13 after diversion and distribution, opens the first ball valve 5, and the powder enters the discharge pipe 4 and then enters the agent spray gun hose connection, and is sprayed into the boiler furnace through the desulfurization and denitrification agent spray gun; during operation, dry desulfurization and denitrification are used in conjunction with the SNCR denitrification system and the rear-end semi-dry desulfurization. According to the flue gas pollutant emission indicators, generally only one layer needs to be used.

[0055] To sum up, the distributor of the utility model has a simple structure, more stable operation and easy maintenance; the mother-child pipe distribution structure is optimized in design, and the distributor adopts a unique structure in which the guide cone and the circular arc plate are organically combined. The guide cone and the circular arc plate can evenly disperse and distribute the powder, and solve the pain points of scaling, blockage and wear caused by turbulence of powder / air entering the distributor cavity, which can ensure the normal and stable operation of the dry desulfurization and denitrification system, and effectively ensure the normal environmental protection indicators of the factory production; it can be used for flue gas purification in waste incineration power plants, cement plants, paper mills and other industries, and can also be used for powder distribution in the field of pneumatic conveying in various industries.

[0056] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0057] In the description of the embodiments of the present invention, 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.

[0058] 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0059] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A dispenser, characterized in that: include: The reducer (11) has a small diameter end (111) as a feed end and a large diameter end (112) as a discharge end; A distribution cover (12) is arranged on the large diameter end (112) of the reducer (11); wherein The distribution cover (12) is provided with a plurality of outlet branch pipes (13); and A guide cone (121) is provided in the middle of the inner side of the distribution cover (12) for guiding the material entering from the small diameter end (111) of the reducer (11) to the outlet branch pipe (13).

2. The dispenser according to claim 1, characterized in that The guide cone (121) is formed by an inward depression in the middle of the hemispherical distribution cover (12).

3. The dispenser according to claim 1, characterized in that The dispensing cover (12) comprises: a first circular arc plate (122) connected to the large diameter end (112) of the reducer (11); and A second circular arc plate (123) is located on the inner side of the first circular arc plate (122) and is connected to the first circular arc plate (122) and the guide cone (121).

4. The dispenser according to claim 1, characterized in that The cone top angle of the guide cone (121) is 30° to 100°.

5. The dispenser according to claim 1, characterized in that The conical surface of the guide cone (121) and the axis of the reducer (11) form a first angle α1, and the outlet branch pipe (13) and the axis of the reducer (11) form a second angle α2; wherein The first angle α1 and the second angle α2 tend to be equal.

6. A distribution pipeline for dry flue gas desulfurization and denitrification, characterized in that: include: A transport main pipe (2); A plurality of conveying sub-tubes (3) arranged at intervals; the feed end of each conveying sub-tube (3) is connected to the conveying main tube (2), and the discharge end is connected to the distributor (1) according to any one of claims 1 to 5; and A discharge pipe (4) is connected to each outlet branch pipe (13) of the distributor (1), and a first ball valve (5) is arranged on the discharge pipe (4).

7. The distribution pipeline according to claim 6, characterized in that The discharge end of the conveying sub-tube (3) is connected to the small-diameter end (111) of the reducer (11) via a conveying elbow (6).

8. The distribution pipeline according to claim 6, characterized in that The included angle β between the axes of the conveying sub-pipe (3) and the conveying main pipe (2) is 20° to 60°.

9. The distribution pipeline according to claim 6, characterized in that The delivery sub-pipe (3) is provided with a second ball valve (7).

10. The distribution pipeline according to claim 6, characterized in that The delivery sub-tube (3) is provided with a blowing-assisting tube (8).

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