Dissolving tank and anti-caking device thereof

Abstract

The invention belongs to the technical field of dissolving tanks, and provides a dissolving tank and an anti-caking device thereof, the anti-caking device comprises: a straight pipe arranged at the outer top of the dissolving tank and used for introducing dilute white liquid; the bent pipe is arranged at the top in the dissolving tank and close to an included angle between the inner side wall of the dissolving tank below the chute and the top cover of the dissolving tank, one end of the bent pipe penetrates through the top cover of the dissolving tank and is communicated with the straight pipe, and the other end extends along the inner side wall of the dissolving tank in an arc shape and is used for distributing dilute white liquid; the nozzles are respectively communicated with the bent pipe and are used for spraying dilute white liquid to the inner side wall of the dissolving tank; wherein the spraying direction of each nozzle can automatically deflect up and down along with the rising and falling of the liquid level of the green liquid in the dissolving tank. The nozzle automatically deflects up and down to cool and protect the inner side wall of the dissolving tank and clean the included angle between the inner side wall of the dissolving tank and the top cover of the dissolving tank, so that the inner side wall of the dissolving tank is effectively prevented from thermal deformation, the service life of the dissolving tank is prolonged, the maintenance cost is reduced, and potential safety hazards caused by caking are eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of dissolving tanks, and in particular to a dissolving tank and an anti-caking device thereof. Background Art

[0002] The dissolving tank is a container that uses dilute white liquor to dissolve the dissolved matter flowing out of the alkali furnace into green liquor.

[0003] Currently, if Figure 1 and Figure 2 As shown in the figure, the high temperature solution in the alkali furnace body 1 flows from multiple chutes 2 into the dissolving tank 3. When the high temperature solution is about to be dissolved into green liquor by the dilute white liquor in the dissolving tank 3, it will first be purged by the steam from the muffler 4 and dispersed (in Figure 2 (Indicated by multiple radial dotted lines in the figure), the dispersion of high-temperature solvent will produce dust (i.e., alkaline ash). Most of the dust and water vapor generated during the dissolution process will be extracted and processed by the fan (not shown in the figure), and the remaining small part of the dust will mix with the water vapor and adhere to the angle 33 between the inner wall 31 of the dissolving tank below the chute and the top cover 32 of the dissolving tank, forming honeycomb agglomerates. When the agglomerates accumulate to a certain extent, they will absorb and adhere to more splashing solvents, causing the agglomerates to gradually increase. Because the agglomerates are composed of dust and water vapor in the early stage of formation, the roots are extremely soft and can easily fall off when subjected to force. Agglomerates attached to high-temperature solvents carry a large amount of heat energy, and if they fall into the green liquor in the dissolving tank, they will explode and disintegrate. The shock wave of the explosion poses a great safety hazard to the dissolving tank and the surrounding workers.

[0004] In addition, according to process requirements, the dissolving tank 3 is equipped with a low liquid level line 34 and a high liquid level line 35. The liquid level is controlled by a green liquor pump (not shown). When the green liquor reaches the low liquid level line, some of the dispersed high-temperature solution will spray directly onto the inner wall of the dissolving tank, causing a certain degree of wear. Simultaneously, the inner wall of the dissolving tank expands rapidly due to the high temperature. As the high-temperature solution continues to dissolve, the green liquor level gradually rises. The expanded inner wall of the dissolving tank begins to contract due to the cooling of the liquid. When the green liquor level rises to the high liquid level line, the green liquor pump operates to pump out some green liquor to lower the liquid level back to the low liquid level line. This cycle repeats, further abrading the inner wall of the dissolving tank, causing deformation and even cracking, ultimately leading to green liquor leakage. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a dissolving tank and its anti-caking device to solve the problems that the existing dispersed high-temperature dissolved matter is mixed with water vapor and adheres to the angle between the inner wall of the dissolving tank below the chute and the top cover of the dissolving tank to form honeycomb agglomerates, and the inner wall of the dissolving tank is worn by the dispersed high-temperature dissolved matter.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A dissolving tank and an anti-caking device thereof, comprising:

[0008] A straight pipe is installed on the top of the dissolving tank to introduce dilute white liquor;

[0009] A curved pipe is provided at the top of the dissolving tank and near the angle between the inner side wall of the dissolving tank and the top cover of the dissolving tank below the chute, with one end passing through the top cover of the dissolving tank to communicate with the straight pipe and the other end extending in an arc shape along the inner side wall of the dissolving tank for distributing the dilute white liquor; and

[0010] There are multiple nozzles, each of which is connected to the elbow and is used to spray the dilute white liquid toward the inner wall of the dissolving tank;

[0011] The spraying direction of each nozzle can be automatically deflected up and down following the rise and fall of the liquid level of the green liquor in the dissolving tank.

[0012] Optionally, one end of each nozzle is connected to the elbow in a sealed hinged manner, and the other end can be driven by a direction adjustment mechanism to automatically deflect up and down around the hinge point following the rise and fall of the liquid level of the green liquid in the dissolving tank.

[0013] Optionally, the direction adjustment mechanism includes a connecting rod and a floating ball, the upper end of the connecting rod is in a U-shaped structure, and a pair of pins are provided on the inner side thereof;

[0014] The pin is slidably and rotatably connected to a slide groove provided on the outer wall of the nozzle;

[0015] The lower end of the connecting rod is detachably connected to the float;

[0016] The float is suspended in the green liquor in the dissolving tank.

[0017] Optionally, the direction adjustment mechanism further includes a guide block vertically connected to the inner side wall of the dissolving tank;

[0018] The lower end of the connecting rod slides through the guide block and is detachably connected to the floating ball.

[0019] Optionally, the lower end of the connecting rod is sealed and extends into the floating ball in a threaded connection manner.

[0020] Optionally, the angle of automatic up and down deflection of each nozzle is ±45°.

[0021] Optionally, each of the nozzles is a Laval nozzle.

[0022] Optionally, the plurality of nozzles are arranged at equal intervals along the arc length direction of the curved pipe.

[0023] Optionally, a support block is connected to the inner side wall of the dissolving tank;

[0024] The bent pipe is mounted on the support block via a spring.

[0025] A dissolving tank comprising any one of the above anti-caking devices.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The nozzle can automatically deflect up and down according to the rise and fall of the liquid level of the green liquor in the dissolving tank through the spraying direction. It can not only cool and protect the inner wall of the dissolving tank, but also clean the angle between the inner wall of the dissolving tank and the top cover of the dissolving tank, thereby effectively preventing the inner wall of the dissolving tank from being deformed by heat, which is beneficial to extend the service life of the dissolving tank and reduce maintenance costs, while eliminating the safety hazards caused by agglomeration.

[0028] 2. When each nozzle sprays the dilute white liquid, especially when spraying the dilute white liquid toward the angle, the elbow will be subjected to the reaction force or the impact of the dilute white liquid rebounding from the angle, which will produce a certain degree of vibration. The spring can absorb these vibrations while not affecting the dilute white liquid rebounding from the angle to flush the possible lumps on the elbow. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 It is a top view of a dissolution tank in the prior art;

[0031] Figure 2 for Figure 1 AA-axis cross-sectional structural diagram;

[0032] Figure 3 It is a structural schematic diagram of the present invention;

[0033] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0034] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of the local C in the middle;

[0035] Figure 6 for Figure 5 Schematic diagram of the local D magnified structure;

[0036] Figure 7 Schematic diagram of the three-dimensional structure of the anti-caking device (straight pipes and curved pipes are not shown);

[0037] Figure 8Schematic diagram of the three-dimensional structure of the connecting rod and the float;

[0038] Figure 9 Schematic diagram of the three-dimensional structure of the nozzle. DETAILED DESCRIPTION

[0039] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 should not be understood as limiting the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0042] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0044] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention.

[0045] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0046] See also Figures 3 to 9 As shown, in one aspect, the present invention provides an anti-caking device 100 for a dissolving tank, comprising:

[0047] A straight pipe 110 is provided at the top of the dissolving tank 3 and is used to introduce the dilute white liquor;

[0048] The curved pipe 120 is provided at the top of the dissolving tank 3 and at the angle 33 between the inner side wall 31 of the dissolving tank and the top cover 32 of the dissolving tank, close to the bottom of the chute 2. One end of the curved pipe 120 passes through the top cover 32 of the dissolving tank and communicates with the straight pipe 110, and the other end extends in an arc shape along the inner side wall 31 of the dissolving tank to distribute the dilute white liquor; and

[0049] There are multiple nozzles 130, which are respectively connected to the elbow 120 and are used to spray the dilute white liquid toward the inner wall 31 of the dissolving tank;

[0050] The spraying direction of each nozzle 130 can be automatically deflected up and down following the rise and fall of the liquid level of the green liquor in the dissolving tank 3 .

[0051] Specifically, dilute white liquor from the outside flows through the straight pipe 110 into the curved pipe 120, then flows to multiple nozzles 130, where it is sprayed onto the inner wall 31 of the dissolving tank. When the green liquor in the dissolving tank 3 is at the low liquid level 34, the spray direction of the nozzles 130 is tilted downward. At this time, the dilute white liquor sprayed from each nozzle 130 directly contacts the inner wall 31 of the dissolving tank to cool it, forming a liquid film protective layer on the inner wall 31 of the dissolving tank, thereby reducing the wear caused by the high-temperature solution dispersed by the low liquid level of the green liquor being directly sprayed onto the inner wall 31 of the dissolving tank. As the green liquor level gradually rises to the high liquid level line 35, the nozzle 130 automatically deflects upward, causing its spray direction to gradually shift upward and ultimately toward the angle 33 between the inner wall 31 of the dissolving tank and the top cover 32. The sprayed dilute white liquor then flushes the angle 33 to remove lumps formed by the mixture of dust and water vapor generated by the dispersion of the high-temperature solution. Furthermore, some of the dilute white liquor flows down along the inner wall 31 of the dissolving tank, continuously cooling the inner wall 31 and strengthening the protection provided by the existing liquid film layer. In other words, the nozzle 130, whose spray direction automatically deflects up and down in response to the rise and fall of the green liquor level in the dissolving tank 3, not only cools and protects the inner wall 31 of the dissolving tank, but also cleans the angle 33 between the inner wall 31 and the top cover 32, effectively preventing thermal deformation of the inner wall 31. This helps extend the service life of the dissolving tank 3 and reduce maintenance costs, while also eliminating the safety hazards caused by lumps.

[0052] See also Figures 6 to 9 As shown, one end of each nozzle 130 is connected to the elbow 120 in a sealed, hinged manner. The other end, driven by a steering mechanism, automatically pivots up and down around a hinge point as the level of the green liquor in the dissolving tank 3 rises and falls. Specifically, the steering mechanism comprises a connecting rod 140 and a float 150. The upper end of the connecting rod 140 is U-shaped, with a pair of pins 141 inside. The pins 141 are slidably and rotatably connected to slots 131 defined on the outer wall of the nozzle 130. The lower end of the connecting rod 140 is detachably connected to the float 150, which is suspended in the green liquor in the dissolving tank 3. As the level of the green liquor in the dissolving tank 3 rises and falls, the float 150 moves up and down, moving the connecting rod 140 with it. Finally, the sliding and rotation of the pins 141 within the slots 131 automatically pivot the nozzle 130 up and down around the hinge point, thereby changing the spray direction of the nozzle 130.

[0053] In order to prevent the float 150 from swinging horizontally so that its up and down movement can be transmitted to the nozzle 130 more quickly, the adjustment mechanism also includes a guide block 160 vertically connected to the inner wall 31 of the dissolution tank. The lower end of the connecting rod 140 slides through the guide block 160 and is detachably connected to the float 150.

[0054] The lower end of the connecting rod 140 is threaded and sealed into the float 150. By rotating the float 150, the depth of the lower end of the connecting rod 140 extending into the float 150 can be adjusted, thereby adjusting the vertical movement of the float 150 and the vertical movement distance of the connecting rod 140. This adjusts the angle of automatic vertical deflection of the nozzle 130, and thus adjusts the radiation area of ​​the nozzle 130, ensuring that the angle 33 and the inner side wall 31 of the dissolution tank downward are covered by the dilute white liquor sprayed by the nozzle 130.

[0055] In this embodiment, each nozzle 130 preferably automatically deflects upwards and downwards at an angle of ±45° (with respect to the horizontal plane). This means that the nozzle 130 can automatically deflect upwards from -45° to +45°. Furthermore, each nozzle 130 is preferably a Laval nozzle. The aperture of a Laval nozzle gradually decreases and then expands along the direction of liquid discharge. This creates a supersonic shear layer at the nozzle 130 outlet. The entrainment of the high-speed liquid flow thoroughly removes the agglomerates formed by the mixture of dust and water vapor generated by the dispersion of the high-temperature solution at angle 33, enhancing the cleaning effect.

[0056] See also Figure 3 As shown, a plurality of nozzles 130 are arranged at equal intervals along the arc length direction of the elbow 120. Specifically, two nozzles 130 are configured under each chute 2.

[0057] See also Figure 6 As shown, a support block 36 is connected to the inner sidewall 31 of the dissolution tank, and the curved pipe 120 is mounted on the support block 36 via a spring 170. Specifically, multiple support blocks 36 and springs 170 are provided, each corresponding to each other, to stably support the curved pipe 120. When each nozzle 130 sprays dilute white liquor, especially toward the angle 33, the curved pipe 120 is subjected to a certain degree of vibration due to the reaction force or the impact of the dilute white liquor rebounding from the angle 33. The spring 170 absorbs this vibration while ensuring that the dilute white liquor rebounding from the angle 33 can flush any lumps on the curved pipe 120.

[0058] In another aspect, the present invention provides a dissolving tank including the aforementioned anti-caking device. This device prevents the formation of honeycomb agglomerates at the angle 33 between the inner sidewall 31 of the dissolving tank and the top cover 32 below the chute 2 when dissolving high-temperature solution from the alkali furnace body 1. This prevents the formation of agglomerates at the angle 33 between the inner sidewall 31 of the dissolving tank and the top cover 32 of the dissolving tank below the chute 2, thereby fundamentally preventing agglomerates from falling into the green liquor and causing explosions, effectively eliminating safety hazards.

[0059] The above embodiments are only preferred embodiments of the present invention and are not limitations on the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. An anti-caking device for a dissolving tank, characterized in that: include: A straight pipe is installed on the top of the dissolving tank to introduce dilute white liquor; A curved pipe is provided at the top of the dissolving tank and near the angle between the inner side wall of the dissolving tank and the top cover of the dissolving tank below the chute, with one end passing through the top cover of the dissolving tank to communicate with the straight pipe and the other end extending in an arc shape along the inner side wall of the dissolving tank for distributing the dilute white liquor; and There are multiple nozzles, each of which is connected to the elbow and is used to spray the dilute white liquid toward the inner wall of the dissolving tank; The spraying direction of each nozzle can be automatically deflected up and down following the rise and fall of the liquid level of the green liquor in the dissolving tank.

2. The anti-caking device of the dissolving tank according to claim 1, characterized in that: One end of each nozzle is connected to the elbow in a sealed hinged manner, and the other end can be automatically deflected up and down around the hinge point by the drive of the adjustment mechanism following the rise and fall of the liquid level of the green liquid in the dissolving tank.

3. The anti-caking device of the dissolving tank according to claim 2, characterized in that: The direction adjustment mechanism includes a connecting rod and a floating ball. The upper end of the connecting rod is a U-shaped structure with a pair of pins on the inner side. The pin is slidably and rotatably connected to a slide groove provided on the outer wall of the nozzle; The lower end of the connecting rod is detachably connected to the float; The float is suspended in the green liquor in the dissolving tank.

4. The anti-caking device of the dissolving tank according to claim 3, characterized in that: The direction adjustment mechanism further includes a guide block vertically connected to the inner side wall of the dissolving tank; The lower end of the connecting rod slides through the guide block and is detachably connected to the floating ball.

5. The anti-caking device of the dissolving tank according to claim 3 or 4, characterized in that: The lower end of the connecting rod is sealed and extends into the floating ball in a threaded connection manner.

6. The anti-caking device for a dissolving tank according to any one of claims 1 to 4, characterized in that: The angle of automatic up and down deflection of each nozzle is ±45°.

7. The anti-caking device of the dissolving tank according to claim 6, characterized in that: Each of the nozzles is a Laval nozzle.

8. The anti-caking device of the dissolving tank according to claim 1 or 7, characterized in that: The plurality of nozzles are arranged at equal intervals along the arc length direction of the curved pipe.

9. The anti-caking device of the dissolving tank according to claim 8, characterized in that: A support block is connected to the inner side wall of the dissolving tank; The bent pipe is mounted on the support block via a spring.

10. A dissolving tank, characterized in that: The invention comprises the anti-caking device according to any one of claims 1 to 9.

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