An alkali recovery boiler for waste alkali purification

Abstract

This utility model discloses an alkali recovery boiler for waste alkali purification, comprising: a spray gun holder disposed within the alkali recovery boiler; an inlet pipe disposed on one side of the spray gun holder; a spray gun assembly disposed on the top of the spray gun holder for spraying atomized and concentrated black liquor for combustion within the alkali recovery boiler; the spray gun assembly includes a spray gun head, multiple frustum-shaped nozzles on the spray gun head, and guide grooves disposed between the nozzles; a drive component disposed within the spray gun holder; and a cleaning component disposed on the spray gun assembly and fixedly installed with the drive component. The drive component drives the cleaning component to rotate, and the cleaning component cleans the inner and outer sides of the spray gun assembly and the nozzles to prevent clogging of the spray gun assembly. It also includes multiple arc-shaped plates disposed between two slip rings to drive the slip rings to rotate within the slip groove. This utility model achieves automatic cleaning of the black liquor spray gun nozzle, avoiding clogging and improving the service life of the nozzle.

Description

Technical Field

[0001] This utility model relates to the field of alkali recovery boiler technology, and in particular to an alkali recovery boiler for waste alkali purification. Background Technology

[0002] Alkali recovery boilers use the waste liquid discharged after pulp washing in alkali papermaking. After concentration, the liquid is fed into the furnace for combustion. After combustion, the black liquor is discharged from the bottom of the furnace as liquid slag. After causticization, it is reduced to alkali, and the steam becomes a secondary energy source for reuse.

[0003] Currently, when alkali recovery boilers burn black liquor, the liquor is atomized by nozzles and sprayed into the furnace. After a period of time, the molten particles carried by the flue gas recirculation accumulate at the nozzle of the black liquor spray gun. As time goes on, this accumulation becomes more and more serious, eventually causing the nozzle of the black liquor spray gun to be blocked, making cleaning difficult and affecting the service life of the nozzle. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings by providing an alkali recovery boiler for waste alkali purification, which automatically cleans the nozzle of the black liquor spray gun, preventing clogging and extending the service life of the nozzle.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a waste alkali purification and alkali recovery boiler, comprising:

[0006] The spray gun holder is installed inside the alkali recovery boiler;

[0007] The inlet pipe is located on one side of the spray gun holder;

[0008] The spray gun assembly, located on top of the spray gun holder, is used to spray atomized concentrated black liquor for combustion in the alkali recovery boiler.

[0009] The spray gun assembly includes a spray gun head, a plurality of frustum-shaped spray holes opened on the spray gun head, and a guide groove disposed between the spray holes;

[0010] The driving component is located inside the spray gun holder;

[0011] A cleaning component is mounted on the spray gun assembly and fixedly installed with the drive component. The drive component is used to drive the cleaning component to rotate. The cleaning component is used to clean the inner and outer sides of the spray gun assembly and the spray nozzles to prevent clogging of the spray gun assembly.

[0012] Furthermore, the driving component includes a sluice box symmetrically arranged in the spray gun holder and slip rings respectively arranged in the sluice box;

[0013] It also includes multiple arc-shaped plates set between the two slip rings to drive the slip rings to rotate within the slip groove.

[0014] Furthermore, the spray gun assembly includes a mounting base disposed on a top slide body, the mounting base being snapped into the spray gun head.

[0015] Furthermore, the cleaning assembly includes a rotating rod disposed inside the spray gun head, the rotating rod having a cleaning component rotatably connected to the outer wall of the spray gun head, and the rotating rod having a collecting component rotatably connected to the inner wall of the spray gun head.

[0016] Furthermore, the cleaning component includes a cleaning rod disposed on the rotating rod and in contact with the outer wall of the spray gun head, the cleaning rod being provided with a spring facing the spray hole, and the spring being provided with a frustum for cleaning the spray hole.

[0017] Furthermore, the cleaning assembly also includes a rotating cylinder disposed at the bottom of the rotating rod and extending to the outside of the spray gun seat, the rotating cylinder being provided with a fixing rod that is fixedly connected to the slip ring;

[0018] It also includes a hollow ring disposed at the bottom of the collector, the hollow ring having a conduit for connecting to the rotating drum.

[0019] The beneficial effects of this utility model are reflected in:

[0020] This invention involves injecting concentrated black liquor into the spray gun holder via an inlet pipe, which pushes an arc-shaped plate. The arc-shaped plate then drives a slip ring to rotate within a sliding groove. The concentrated black liquor is then burned through the spray nozzle. The slip ring drives a fixed rod and a rotating rod to rotate on the spray gun head. The rotating rod drives a cleaning rod to clean the spray gun head. A truncated cone on the cleaning rod, under the action of a spring, cleans the spray nozzle. Then, the spring is compressed, and the truncated cone and cleaning rod clean the outer wall of the spray gun head. The burned solids are discharged through a guide groove. The rotating rod then drives a collection component to rotate synchronously with the cleaning rod. The burned solids discharged from the spray nozzle pass through the collection component, a hollow ring, and a guide tube into a rotating drum, and are discharged from the rotating drum. This achieves automatic cleaning of the black liquor spray gun nozzle, preventing clogging and extending the service life of the nozzle. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a three-dimensional structural cross-sectional view of the present invention;

[0023] Figure 3 This is a perspective view of the driving component of this utility model;

[0024] Figure 4 This is a perspective view of the spray gun assembly of this utility model;

[0025] Figure 5 This is a perspective view of the cleaning component of this utility model;

[0026] Figure 6This is a three-dimensional sectional view of the cleaning component of this utility model;

[0027] Figure 7 For the present utility model Figure 6 A magnified view of part of A shown.

[0028] In the picture:

[0029] 1. Spray gun holder;

[0030] 2. Inlet pipe;

[0031] 3. Driving component; 31. Slide body; 32. Slip ring; 33. Arc plate;

[0032] 4. Spray gun assembly; 41. Mounting base; 42. Spray gun head; 43. Spray nozzle; 44. Flow guide channel;

[0033] 5. Cleaning component; 51. Rotating rod; 52. Cleaning part; 521. Cleaning rod; 522. Spring; 523. Frustum; 53. Collector; 54. Hollow ring; 55. Rotating cylinder; 56. Fixing rod; 57. Conduit. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0035] Please see Figure 1-7 This utility model discloses an alkali recovery boiler for waste alkali purification, comprising:

[0036] Spray gun holder 1 is installed inside the alkali recovery boiler, and spray gun holder 1 has a cavity.

[0037] The inlet pipe 2 is located on one side of the spray gun holder 1 and is used to spray into the spray gun holder 1 to atomize and concentrate the black liquid. The direction of the inlet pipe 2 is convenient for driving the drive component 3 to rotate.

[0038] The spray gun assembly 4 is located on top of the spray gun base 1 and is used to spray atomized concentrated black liquor for combustion in the alkali recovery boiler. The spray gun assembly 4 is fixedly installed to the spray gun base 1 by snap-fit ​​or bolts.

[0039] The spray gun assembly 4 includes a spray gun head 42, a plurality of frustum-shaped spray holes 43 opened on the spray gun head 42, and a guide groove 44 disposed between the spray holes 43. The spray gun head 42 is conical to discharge the cleaned combustion solids and avoid clogging the spray holes 43 on the spray gun head 42.

[0040] The driving component 3 is located inside the spray gun base 1. Driven by the atomized concentrated black liquid, the driving component 3 drives the cleaning component 5 to clean the spray gun component 4.

[0041] The cleaning component 5 is rotatably mounted on the spray gun assembly 4 and fixedly installed with the drive component 3. The drive component 3 is used to drive the cleaning component 5 to rotate. The cleaning component 5 is used to clean the inner and outer sides of the spray gun assembly 4 and the spray nozzle 43 to prevent the spray gun assembly 4 from being blocked. The cleaning component 5 is rotatably mounted on the spray gun base 1 and penetrates the bottom wall of the spray gun base 1, extending to the outside of the spray gun base 1.

[0042] During use, the black liquid is atomized and concentrated by the inlet pipe 2 and discharged through the nozzle 43 on the nozzle head 42. The atomized and concentrated black liquid drives the drive component 3 to rotate, which in turn drives the cleaning component 5 to clean the inner and outer walls of the nozzle assembly 4 and the nozzle 43. The cleaned solids fall into the collection component 53 through the nozzle 43. The solids on the outer wall of the nozzle assembly 4 are discharged through the guide groove 44. The solids on the cleaning component 52 are discharged through the hollow ring 54, the guide tube 57 and the rotating drum 55. The black liquid nozzle is automatically cleaned to avoid clogging and improve the service life of the nozzle.

[0043] In a specific embodiment, the driving component 3 includes a sliding groove body 31 symmetrically arranged in the spray gun holder 1 and a sliding ring 32 respectively arranged in the sliding groove body 31. The sliding groove body 31 is fixedly installed with the spray gun holder 1 by bolts. The top of the spray gun holder 1 is connected to the sliding groove body 31 by bolts to install a ring body to seal the spray gun holder 1.

[0044] It also includes multiple arc-shaped plates 33 disposed between the two slip rings 32, which drive the slip rings 32 to rotate within the slide groove 31, and the multiple arc-shaped plates 33 are arranged in a circular shape around the slip rings 32.

[0045] In one embodiment, the spray gun assembly 4 includes a mounting base 41 disposed on the top slide body 31. The mounting base 41 is snapped into the spray gun head 42 and the mounting base 41 and the spray gun head 42 are fixedly installed by snapping or bolting.

[0046] In a specific embodiment, the cleaning component 5 includes a rotating rod 51 disposed inside the spray gun head 42. The rotating rod 51 rotates inside the spray gun head 42. The rotating rod 51 is provided with a cleaning component 52 rotatably connected to the outer wall of the spray gun head 42, and a collecting component 53 rotatably connected to the inner wall of the spray gun head 42. The rotating rod 51 drives the cleaning component 52 and the collecting component 53 to rotate on the inner and outer walls of the spray gun head 42 respectively. The cleaning component 52 and the collecting component 53 clean the inner and outer walls of the spray gun head 42 respectively. The collecting component 53 is in contact with the inner wall of the spray gun head 42. The collecting component 53 is hollow and has an opening at the point where it is in contact with the spray gun head 42.

[0047] In one embodiment, the cleaning component 52 includes a cleaning rod 521 disposed on the rotating rod 51 and in contact with the outer wall of the spray gun head 42. The cleaning rod 521 is provided with a spring 522 facing the spray hole 43. The spring 522 is provided with a frustum 523 for cleaning the spray hole 43. The cleaning rod 521 drives the frustum 523 to rotate on the outer wall of the spray gun head 42. The frustum 523 is adapted to the spray hole 43. Under the action of the cleaning rod 521 and the spring 522, the frustum 523 cleans the spray hole 43. When the cleaning rod 521 rotates, the frustum 523 compresses the spring 522 and disengages from the spray hole 43.

[0048] In a specific embodiment, the cleaning component 5 also includes a rotating cylinder 55 disposed at the bottom of the rotating rod 51 and extending to the outside of the spray gun seat 1. The rotating cylinder 55 is provided with a fixing rod 56 fixedly connected to the slip ring 32. The rotating cylinder 55 is used to discharge the cleaned solids. The slip ring 32 drives the fixing rod 56 and the rotating cylinder 55 to rotate, and the rotating cylinder 55 drives the guide tube 57, the hollow ring 54 and the collection component 53 to rotate.

[0049] It also includes a hollow ring 54 disposed at the bottom of the collecting component 53, and a conduit 57 provided on the hollow ring 54 for connecting to the rotating drum 55.

[0050] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0051] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0052] Additionally, "multiple" refers to two or more.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A boiler for alkali recovery and purification of waste alkali, characterized in that, include: The spray gun holder (1) is installed inside the alkali recovery boiler; The inlet pipe (2) is located on one side of the spray gun holder (1); The spray gun assembly (4) is located on top of the spray gun base (1) and is used to spray atomized concentrated black liquor for combustion in the alkali recovery boiler. The spray gun assembly (4) includes a spray gun head (42), a plurality of frustum-shaped spray holes (43) opened on the spray gun head (42), and a guide groove (44) disposed between the spray holes (43). The driving component (3) is disposed inside the spray gun holder (1); The cleaning component (5) is mounted on the spray gun assembly (4) and fixedly installed with the drive component (3). The drive component (3) is used to drive the cleaning component (5) to rotate. The cleaning component (5) is used to clean the inner and outer sides of the spray gun assembly (4) and the spray nozzle (43) to prevent the spray gun assembly (4) from being blocked.

2. The alkali recovery boiler for waste alkali purification according to claim 1, characterized in that: The driving component (3) includes a slide body (31) symmetrically arranged in the spray gun seat (1) and slip rings (32) respectively arranged in the slide body (31). It also includes multiple arc-shaped plates (33) disposed between the two slip rings (32) to drive the slip rings (32) to rotate within the slide body (31).

3. The alkali recovery boiler for waste alkali purification according to claim 2, characterized in that: The spray gun assembly (4) includes a mounting base (41) disposed on a top slide body (31), the mounting base (41) being snapped into the spray gun head (42).

4. The alkali recovery boiler for waste alkali purification according to claim 3, characterized in that: The cleaning assembly (5) includes a rotating rod (51) disposed inside the spray gun head (42), the rotating rod (51) being provided with a cleaning component (52) rotatably connected to the outer wall of the spray gun head (42), and the rotating rod (51) being provided with a collecting component (53) rotatably connected to the inner wall of the spray gun head (42).

5. The alkali recovery boiler for waste alkali purification according to claim 4, characterized in that: The cleaning component (52) includes a cleaning rod (521) disposed on the rotating rod (51) and attached to the outer wall of the spray gun head (42). The cleaning rod (521) is provided with a spring (522) facing the spray hole (43). The spring (522) is provided with a frustum (523) for cleaning the spray hole (43).

6. The alkali recovery boiler for waste alkali purification according to claim 4, characterized in that: The cleaning assembly (5) also includes a rotating cylinder (55) disposed at the bottom of the rotating rod (51) and extending to the outside of the spray gun seat (1), and the rotating cylinder (55) is provided with a fixing rod (56) fixedly connected to the slip ring (32). It also includes a hollow ring (54) disposed at the bottom of the collecting component (53), the hollow ring (54) having a conduit (57) for connecting to the rotating drum (55).

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