Economizer with anti-blocking structure

Abstract

The utility model relates to the technical field of coal economizers, in particular to a coal economizer with an anti-blocking structure, which comprises a coal economizer, the right side of the coal economizer is connected with a water outlet pipe, the left side of the coal economizer is connected with a water inlet pipe, and one end of the water inlet pipe is provided with a descaling mechanism. By arranging a first air cylinder and a second air cylinder, the purpose of automatically controlling injection of an anti-scaling agent solution according to the pressure of a pressure box can be achieved, and the anti-scaling device is convenient to use and capable of conveniently cleaning scale in a pipeline in the coal economizer and protecting the surface from being damaged while removing the scale. When more scale in the pipeline of the economizer affects water flow circulation and the pressure of the pressure box is too large, liquid is automatically injected, and after the scale in the pipeline of the economizer is cleaned and the pressure of the pressure box returns to normal, continuous injection of the descaling agent solution is stopped.

Description

Technical Field

[0001] The utility model relates to the technical field of economizers, in particular to an economizer with an anti-blocking structure. Background Art

[0002] When using the economizer, it is necessary to prevent the economizer from being blocked. When the existing economizer is working, since the water is heated inside the economizer for a long time, scale will be generated as long as the water is under high temperature state. There is no specific degree. Under high temperature state, the calcium sulfate slightly soluble in water in the water will precipitate due to the evaporation of water, and the carbonate ions in the water will combine with calcium, magnesium and other ions to generate water-insoluble calcium carbonate and magnesium carbonate, that is, water scale. With the continuous evaporation and concentration of water, the water scale content continues to increase, and scale is formed after reaching saturation. The accumulation of time after the scale is generated will cause the economizer to be blocked, thereby affecting the use of the economizer.

[0003] Prior art, such as publication number CN217684935U, provides an economizer with an anti-blocking structure, which belongs to the technical field of economizers. The key points of its technical solution include an economizer, wherein the front side of the economizer is fixedly connected to a main box, a box cover is provided on the top of the main box, and a filtering mechanism is provided inside the main box. This solves the problem that when the existing economizer is working, water is heated inside the economizer for a long time, and water will produce scale without a specific degree as long as the water is under a high temperature state. Under high temperature conditions, calcium sulfate that is slightly soluble in water in the water will precipitate due to the evaporation of water, and carbonate ions in the water will combine with calcium, magnesium and other ions to generate water-insoluble calcium carbonate and magnesium carbonate, that is, water alkali. As the water evaporates and concentrates continuously, the water alkali content increases continuously, and scale is formed after reaching saturation. The accumulation of time after the scale is generated will cause the economizer to become blocked, thereby affecting the use of the economizer.

[0004] In this scheme, the heating plate is started to heat the water. After the hard water is boiled, the minerals contained in the hard water adhere to the container and gradually form white block or powder substances. The white block or powder substances are called scale. The scale is decomposed from the hard water. When the water passes through the filter plate, the filter plate filters the water and filters the scale on the surface of the filter plate. The water then enters the inside of the economizer. At this time, the water has a certain temperature. When heated by the economizer, the hard water becomes soft water. Soft water does not produce scale due to its low mineral content. However, the economizer itself is used to recover part of the heat in the flue gas. By setting the heating plate to pre-heat and then filter the scale, first of all, this will lead to a waste of electric energy, and the water body that has been heated and boiled has a high temperature and its own heat capacity ratio is close to saturation, resulting in a decrease in subsequent heat absorption efficiency. Continuous heating of the high-temperature gas is likely to cause it to gasify, which increases the pressure in the economizer. When the pressure is too high, it is easy to cause pipeline leakage. In view of this, we propose an economizer with an anti-blocking structure. Utility Model Content

[0005] The utility model aims to provide an economizer with an anti-blocking structure, which solves the problem that as water evaporates and concentrates continuously, the water alkali content continues to increase, and scale is formed after reaching saturation. The accumulation of time after the scale is generated will cause the economizer to become blocked, thereby affecting the use of the economizer.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A coal economizer with an anti-blocking structure comprises an economizer, wherein a water outlet pipe is connected to the right side of the economizer, a water inlet pipe is connected to the left side of the economizer, a descaling mechanism is arranged at one end of the water inlet pipe, and the descaling mechanism comprises a pressure box, wherein the pressure box is connected to one end of the water inlet pipe, a water inlet joint is connected to the left side of the pressure box, a liquid injection pipe is connected to the top of the pressure box, a liquid storage cylinder is connected to the top of the liquid injection pipe, and a water source is connected via the water inlet joint. When too much scale accumulates inside the economizer, a descaling agent solution can be injected via the liquid storage cylinder via the pressure box to facilitate cleaning of the scale in the internal pipes of the economizer, and the scale can be removed while protecting the surface from damage, so as to avoid filtering the scale by pre-heating, as its temperature is too high and its own heat capacity ratio is close to saturation, resulting in a decrease in subsequent heat absorption efficiency.

[0008] Preferably, the inner wall of the liquid storage cylinder is connected to a first piston, the top of the first piston is connected to a connecting tube, and the position between the top of the first piston and the inner wall of the liquid storage cylinder is connected to a first spring, and the tension of the first spring can push the first piston downward to squeeze out the liquid in the liquid storage cylinder and inject it into the interior of the pressure box through the injection tube.

[0009] Preferably, the connecting tube is connected to the bottom of the first piston, a sealing cap is connected to the top of the connecting tube, and a scale is connected to the outer wall of the connecting tube. By unscrewing the sealing cap, it is convenient to add the descaling solution to the inside of the liquid storage cylinder through the connecting tube to ensure that the descaling solution in the liquid storage cylinder is sufficient.

[0010] Preferably, the inner wall of the injection tube is connected to a second gas cylinder, and the inner wall of the second gas cylinder is slidably connected to a piston column. The injection tube and the second gas cylinder are arranged in a staggered manner to facilitate blocking the injection tube by the piston column.

[0011] Preferably, a connecting hole is provided on the inner wall of the piston column, and the connecting hole is arranged in a vertical direction, and the connecting hole on the piston column is aligned with the inner hole of the injection tube to facilitate the circulation of the descaling solution.

[0012] Preferably, one end of the second gas cylinder is connected to a limit strip, the inner wall of the limit strip is slidably connected to a limit rod, and the limit rod is connected to one end of the piston column. By setting the limit strip, the piston column can be prevented from slipping out of the second gas cylinder, and the connection relationship between the limit rod and the limit strip can prevent the piston column from rotating on the inner wall of the second gas cylinder.

[0013] Preferably, the top of the pressure box is connected to a first air cylinder, the inner wall of the first air cylinder is slidably connected to a second piston, a second spring is connected to a position between the top of the second piston and the first air cylinder, the interior of the first air cylinder is connected to the interior of the second air cylinder through an air pipe, and by arranging the first air cylinder to connect the pressure box, when too much scale accumulates in the pipe of the economizer, it will affect the overall flow rate of the water body, and when the water inlet pressure of the water inlet joint remains unchanged, the internal pressure of the pressure box will increase, so that the water body will exert a squeezing force on the second piston in the first air cylinder, so that The second piston is pushed and squeezes the air in the first cylinder into the second cylinder. The air entering the second cylinder will squeeze the piston column to move. When the piston column contacts the limit strip, the connecting hole will be aligned with the injection pipe. The injection pipe is connected to the pressure box. After the scale in the economizer pipeline is removed, the pressure in the pressure box returns to normal. At this time, under the action of the second spring tension, the second piston is pushed to move, and the air in the second cylinder is drawn back to the first cylinder, so that the piston column is reset, and the connecting hole will be misaligned with the injection pipe, so that the injection pipe is disconnected from the pressure box, so as to achieve the purpose of automatic injection.

[0014] By means of the above technical solution, the utility model provides a coal economizer with an anti-blocking structure. It has at least the following beneficial effects:

[0015] 1. The utility model injects a descaling agent solution through a liquid storage cylinder to facilitate the cleaning of scale in the internal pipes of the economizer. It can remove the scale while protecting the surface from damage, so as to avoid the method of filtering the scale by pre-heating. Due to its high temperature, its own heat capacity ratio is close to saturation, resulting in a decrease in subsequent heat absorption efficiency.

[0016] 2. The utility model sets the second gas cylinder and the first gas cylinder so that the injection of the descaling solution can be automatically controlled according to the pressure of the pressure box. When there is a lot of scale in the economizer pipeline that affects the water flow, the pressure of the pressure box is too high and the liquid is automatically injected. After the scale in the economizer pipeline is cleaned and the pressure of the pressure box returns to normal, the injection of the descaling solution is stopped. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a partial cross-sectional view of the descaling mechanism in the utility model;

[0020] Figure 3 For the utility model Figure 2 A magnified view;

[0021] Figure 4 It is a structural schematic diagram of the first piston in the utility model.

[0022] In the figure: 1. economizer; 2. water outlet pipe; 3. water inlet pipe; 4. descaling mechanism; 41. pressure box; 42. water inlet joint; 43. liquid injection pipe; 44. liquid storage cylinder; 45. first piston; 451. connecting pipe; 452. first spring; 453. scale; 454. sealing cap; 46. first air cylinder; 461. second piston; 462. second spring; 463. air pipe; 47. second air cylinder; 471. piston column; 472. connecting hole; 473. limit strip; 474. limit rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0024] Example 1

[0025] An economizer with an anti-blocking structure, such as Figure 1 - Figure 4 As shown, it includes an economizer 1, the right side of the economizer 1 is connected to a water outlet pipe 2, the left side of the economizer 1 is connected to a water inlet pipe 3, one end of the water inlet pipe 3 is provided with a descaling mechanism 4, the descaling mechanism 4 includes a pressure box 41, the pressure box 41 is connected to one end of the water inlet pipe 3, the left side of the pressure box 41 is connected to a water inlet joint 42, the top of the pressure box 41 is connected to a liquid injection pipe 43, the top of the liquid injection pipe 43 is connected to a liquid storage cylinder 44, the water source is connected through the water inlet joint 42, through the pressure box 41, when the scale inside the economizer 1 accumulates too much, the descaling agent solution can be injected through the liquid storage cylinder 44 to facilitate the cleaning of the scale in the internal pipeline of the economizer 1, and can protect the surface from damage while removing the scale, so as to avoid the method of filtering the scale by pre-heating due to its over temperature The inner wall of the liquid storage cylinder 44 is connected with a first piston 45, and the top of the first piston 45 is connected with a connecting tube 451. The position between the top of the first piston 45 and the inner wall of the liquid storage cylinder 44 is connected with a first spring 452. The tension of the first spring 452 can push the first piston 45 downward to squeeze out the liquid in the liquid storage cylinder 44, and inject it into the interior of the pressure box 41 through the injection tube 43. The connecting tube 451 is connected to the bottom of the first piston 45. The top of the connecting tube 451 is connected with a sealing cap 454, and the outer wall of the connecting tube 451 is connected with a scale 453. By unscrewing the sealing cap 454, it is convenient to replenish the descaling solution into the liquid storage cylinder 44 through the connecting tube 451 to ensure that the descaling solution in the liquid storage cylinder 44 is sufficient.

[0026] In this embodiment, the tension of the first spring 452 pushes the first piston 45 downward to squeeze out the liquid in the storage cylinder 44, and injects it into the interior of the pressure box 41 through the injection pipe 43. The water source is connected through the water inlet joint 42, and through the pressure box 41. When too much scale accumulates inside the economizer 1, a descaling agent solution can be injected through the liquid storage cylinder 44 to facilitate the cleaning of the scale in the internal pipes of the economizer 1. While removing the scale, the surface can be protected from damage, so as to avoid the method of filtering the scale by pre-heating. Due to its high temperature, its own heat capacity ratio is close to saturation, resulting in a decrease in subsequent heat absorption efficiency.

[0027] Example 2

[0028] like Figure 2 , Figure 4As shown, the inner wall of the injection tube 43 is connected to the second air cylinder 47, and the inner wall of the second air cylinder 47 is slidably connected to the piston column 471. The injection tube 43 and the second air cylinder 47 are arranged in a staggered manner to facilitate the blocking of the injection tube 43 by the piston column 471. The inner wall of the piston column 471 is provided with a connecting hole 472, and the connecting hole 472 is arranged in a vertical direction. The connecting hole 472 on the piston column 471 is aligned with the inner hole of the injection tube 43 to facilitate the circulation of the descaling solution. One end of the second air cylinder 47 is connected to a limiting strip 473, and the inner wall of the limiting strip 473 slides A limiting rod 474 is connected, and the limiting rod 474 is connected to one end of the piston column 471. By setting a limiting strip 473, the piston column 471 can be prevented from sliding out of the second gas cylinder 47. The connection relationship between the limiting rod 474 and the limiting strip 473 can prevent the piston column 471 from rotating on the inner wall of the second gas cylinder 47. The top of the pressure box 41 is connected to the first gas cylinder 46. The inner wall of the first gas cylinder 46 is slidably connected to the second piston 461. The position between the top of the second piston 461 and the first gas cylinder 46 is connected to the second spring 462. The interior of the first gas cylinder 46 is connected to the gas cylinder 46. The inside of the pipe 463 and the second air cylinder 47 is connected to the pressure box 41 by setting the first air cylinder 46. When too much scale accumulates in the pipe of the economizer 1, it will affect the overall flow rate of the water body. Under the condition that the water inlet pressure of the water inlet joint 42 remains unchanged, the internal pressure of the pressure box 41 will increase, so that the water body will produce a squeezing force on the second piston 461 in the first air cylinder 46, so that the second piston 461 is pushed and squeezes the air of the first air cylinder 46 into the second air cylinder 47. The air entering the second air cylinder 47 will squeeze the piston column 471 to move. When the piston column 471 contacts the limit strip 473, the connecting hole 472 will be aligned with the injection pipe 43, and the injection pipe 43 is connected to the pressure box 41. After the scale in the pipeline of the economizer 1 is removed, the pressure in the pressure box 41 returns to normal. At this time, under the action of the tension of the second spring 462, the second piston 461 is pushed to move, and the air in the second air cylinder 47 is drawn back to the first air cylinder 46, so that the piston column 471 is reset, and the connecting hole 472 will be misaligned with the injection pipe 43, so that the injection pipe 43 is disconnected from the pressure box 41, so as to achieve the purpose of automatic injection.

[0029] In this embodiment, by setting the first air cylinder 46 to connect the pressure box 41, when too much scale accumulates in the pipe of the economizer 1, it will affect the overall flow rate of the water body. Under the condition that the water inlet pressure of the water inlet joint 42 remains unchanged, the internal pressure of the pressure box 41 will increase, so that the water body will produce a squeezing force on the second piston 461 in the first air cylinder 46, so that the second piston 461 is pushed and squeezes the air of the first air cylinder 46 into the second air cylinder 47. The air entering the second air cylinder 47 will squeeze the piston column 471 to move. When the piston column 4 When 71 contacts the limit strip 473, the connecting hole 472 will be aligned with the injection pipe 43, and the injection pipe 43 is connected to the pressure box 41. After the scale in the pipeline of the economizer 1 is removed, the pressure in the pressure box 41 returns to normal. At this time, under the action of the tension of the second spring 462, the second piston 461 is pushed to move, and the air in the second air cylinder 47 is drawn back to the first air cylinder 46, so that the piston column 471 is reset, and the connecting hole 472 will be misaligned with the injection pipe 43, so that the injection pipe 43 is disconnected from the pressure box 41, so as to achieve the purpose of automatic injection.

[0030] When the economizer with an anti-blocking structure of the utility model is in use, when too much scale accumulates in the pipeline of the economizer 1, it will affect the overall flow rate of the water body. Under the condition that the water inlet pressure of the water inlet joint 42 remains unchanged, the internal pressure of the pressure box 41 will increase, so that the water body will generate a squeezing force on the second piston 461 in the first air cylinder 46, so that the second piston 461 is pushed and squeezes the air of the first air cylinder 46 into the second air cylinder 47. The air entering the second air cylinder 47 will squeeze the piston column 471 to move. When the piston column 471 contacts the limit strip 473, the connecting hole 472 will align with the injection tube 43. The injection tube 43 is connected to the pressure box 41, and the tension of the first spring 452 pushes the first piston 45 downward to squeeze out the liquid in the storage cylinder 44. The injection pipe 43 is injected into the interior of the pressure box 41 and is connected to the water source through the water inlet joint 42. Through the pressure box 41, when too much scale accumulates inside the economizer 1, a descaling agent solution can be injected through the liquid storage cylinder 44 to facilitate the cleaning of the scale in the internal pipeline of the economizer 1. It can remove the scale and protect the surface from damage. After the scale in the pipeline of the economizer 1 is removed, the pressure in the pressure box 41 returns to normal. At this time, under the action of the tension of the second spring 462, the second piston 461 is pushed to move, and the air in the second air cylinder 47 is drawn back to the first air cylinder 46, so that the piston column 471 is reset, and the connecting hole 472 will be misaligned with the injection pipe 43, so that the injection pipe 43 is disconnected from the pressure box 41, so as to achieve the purpose of automatic injection.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal economizer with an anti-blocking structure, comprising a coal economizer (1), characterized in that: The right side of the economizer (1) is connected to a water outlet pipe (2), the left side of the economizer (1) is connected to a water inlet pipe (3), one end of the water inlet pipe (3) is provided with a descaling mechanism (4), the descaling mechanism (4) comprises a pressure box (41), the pressure box (41) is connected to one end of the water inlet pipe (3), the left side of the pressure box (41) is connected to a water inlet joint (42), the top of the pressure box (41) is connected to a liquid injection pipe (43), and the top of the liquid injection pipe (43) is connected to a liquid storage cylinder (44).

2. The economizer with anti-blocking structure according to claim 1, characterized in that: The inner wall of the liquid storage cylinder (44) is connected to a first piston (45), the top of the first piston (45) is connected to a connecting pipe (451), and the position between the top of the first piston (45) and the inner wall of the liquid storage cylinder (44) is connected to a first spring (452).

3. The economizer with anti-blocking structure according to claim 2, characterized in that: The connecting tube (451) is connected to the bottom of the first piston (45), a sealing cap (454) is connected to the top of the connecting tube (451), and a scale (453) is connected to the outer wall of the connecting tube (451).

4. The economizer with anti-blocking structure according to claim 1, characterized in that: The inner wall of the liquid injection tube (43) is connected to a second gas cylinder (47), and the inner wall of the second gas cylinder (47) is slidably connected to a piston column (471).

5. The economizer with anti-blocking structure according to claim 4, characterized in that: The inner wall of the piston column (471) is provided with a communication hole (472), and the communication hole (472) is arranged in a vertical direction.

6. The economizer with anti-blocking structure according to claim 4, characterized in that: One end of the second air cylinder (47) is connected to a limit strip (473), the inner wall of the limit strip (473) is slidably connected to a limit rod (474), and the limit rod (474) is connected to one end of the piston column (471).

7. The economizer with anti-blocking structure according to claim 6, characterized in that: The top of the pressure box (41) is connected to a first gas cylinder (46), the inner wall of the first gas cylinder (46) is slidably connected to a second piston (461), a second spring (462) is connected to a position between the top of the second piston (461) and the first gas cylinder (46), and the interior of the first gas cylinder (46) is connected to the interior of the second gas cylinder (47) through an air pipe (463).

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