Heat exchanger on-line flushing device for sludge drying equipment

Abstract

The utility model relates to the technical field of drying equipment, and discloses a heat exchanger on-line flushing device for sludge drying equipment, which is characterized in that a flushing pipeline is arranged right above an evaporation heat exchanger, a water curtain jet line can be formed right above the surface of the evaporation heat exchanger, and the evaporation heat exchanger can be flushed from top to bottom; the flushing of the marl on one surface is changed into the flushing of the marl on one line, and the flushing line is larger than the surface width of the evaporation heat exchanger, so that the effect of cleaning the whole surface can be achieved; and the characteristic that marl can flow along with water flow is utilized, the problem that slurry is prone to being flushed into the evaporation heat exchanger by adopting front jet water is avoided, and therefore the risk that the slurry is transferred into the heat exchanger is greatly reduced, and the through-flow capacity of the evaporation heat exchanger is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of drying equipment, in particular to an online flushing device for a heat exchanger of sludge drying equipment. Background Art

[0002] After the low-temperature belt sludge dryer has been running for a certain period of time, the mud and ash produced during the drying process of the sludge particles will meet the water film on the windward side of the evaporative heat exchanger (humid) to form mud. The continuous accumulation of mud will cause the windward area of ​​the evaporative heat exchanger to become dirty and blocked, thereby deteriorating the heat exchange effect and affecting the performance of the entire machine.

[0003] Therefore, is the online cleaning function of the evaporative heat exchanger necessary? However, the current cleaning method used in the industry is multi-nozzle front flushing, that is, using flushing nozzles to flush the windward side of the evaporative heat exchanger. However, this cleaning method has two problems:

[0004] (1) It is difficult to fully cover the surface of the evaporative heat exchanger: Due to the limitation of the spray shape of the nozzle, whether it is circular or fan-shaped, the flushing area is difficult to cover the entire windward surface area of ​​the evaporative heat exchanger;

[0005] (2) There is a risk of mud being flushed into the evaporator heat exchanger from the front: The evaporator heat exchanger of the belt dryer adopts a fin-type evaporator heat exchanger, which is composed of multiple rows of tubes and aluminum fins to form a three-dimensional structure with multiple 2-3mm air inlet channels. Under natural conditions, mud will only gather on the windward side of the evaporator heat exchanger to form a dense mud layer (less than 10mm), and it is not easy to accumulate inside the evaporator heat exchanger. When cleaning from the front, while spraying water to disperse the mud, most of the mud formed will be discharged downward with the water flow, while a small amount of mud will be flushed into the evaporator heat exchanger. Especially during online cleaning, the evaporator heat exchanger is in working condition, and high-humidity air enters the evaporator heat exchanger at all times, which can easily bring mud into the evaporator heat exchanger. The mud flushed into the evaporator heat exchanger will adhere to the aluminum fins after drying. Over time, there is a risk of internal blockage of the evaporator heat exchanger, making it difficult to clean again. Utility Model Content

[0006] In view of this, the utility model provides an online flushing device for a heat exchanger of a sludge drying device, which can achieve the effect of cleaning the entire surface and ensure the flow capacity of the evaporative heat exchanger.

[0007] In order to achieve the above technical effects, the utility model provides an online flushing device for a heat exchanger of sludge drying equipment, including a flushing pipe arranged directly above the evaporative heat exchanger, and a water spray channel is provided on the bottom surface of the flushing pipe, and the water spray channel is used to spray water onto the windward surface of the evaporative heat exchanger.

[0008] Furthermore, the water spray channel is a combination of one or more types of spray holes, water spray troughs or nozzles, and the water sprayed from the water spray channel covers the entire windward surface of the evaporative heat exchanger.

[0009] Furthermore, it also includes two guide rails respectively arranged at the two ends of the flushing pipe, the two guide rails are fixed above the evaporative heat exchanger through a bracket, and the two guide rails are parallel to each other; it also includes a telescopic mechanism, which is used to control the flushing pipe to move back and forth in a direction perpendicular to the windward surface of the evaporative heat exchanger.

[0010] Furthermore, the telescopic mechanism is a hydraulic telescopic rod or a stepping drive.

[0011] Furthermore, it also includes a water receiving tray, which is fixed directly below the evaporative heat exchanger and is provided with a flow guide pipe.

[0012] Furthermore, a filter is provided on the guide pipe, and the filter is used to separate the solid and liquid of the material transported in the guide pipe.

[0013] Furthermore, the flushing pipe is connected to the booster water pump, and the end of the guide pipe away from the water receiving tray is connected to the inlet end of the booster water pump.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model sets the flushing pipe just above the evaporative heat exchanger, which can form a water curtain spray line just above the surface of the evaporative heat exchanger, realizing the flushing of the evaporative heat exchanger from top to bottom, and changing the flushing of mud and ash on "one surface" into flushing of mud and ash on "one line". By setting the flushing line larger than the width of the evaporative heat exchanger surface, the entire surface can be cleaned.

[0016] 2. The present invention also utilizes the characteristic that mud can flow with water, avoiding the problem of mud being easily flushed into the interior of the evaporative heat exchanger by using frontal water jets, thereby greatly reducing the risk of mud being transferred into the interior of the heat exchanger and ensuring the flow capacity of the evaporative heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. 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.

[0018] Figure 1 Schematic diagram of the structure of the online flushing device of the heat exchanger used in the sludge drying equipment in the embodiment;

[0019] Figure 2 This is a three-dimensional diagram of an online flushing device for a heat exchanger used in a sludge drying device in an embodiment;

[0020] Among them, 1. Evaporative heat exchanger; 2. Flushing pipe; 3. Guide rail; 4. Telescopic mechanism; 5. Water collection tray; 6. Diversion pipe; 7. Filter; 8. Booster water pump. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0022] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0023] Example

[0024] See also Figure 1 and Figure 2 , an online flushing device for a heat exchanger of a sludge drying device, comprising a flushing pipe 2 arranged directly above an evaporative heat exchanger 1, wherein a water spraying channel is provided on the bottom surface of the flushing pipe 2, and the water spraying channel is used to spray water onto the windward surface of the evaporative heat exchanger 1.

[0025] In this embodiment, because the aluminum fins of the finned evaporative heat exchanger 1 are arranged vertically, their small channels are also arranged vertically. Therefore, in this embodiment, the flushing pipe 2 is arranged directly above the evaporative heat exchanger 1, forming a water curtain spray line directly above the surface of the evaporative heat exchanger 1, achieving a top-down flushing of the evaporative heat exchanger 1, instead of flushing mud and ash "one surface" to flushing mud and ash "one line". By setting the flushing line larger than the width of the evaporative heat exchanger 1 surface, the entire surface can be cleaned. The characteristic of mud and ash flowing with the water flow can be utilized to avoid the problem of mud and ash being easily flushed into the interior of the evaporative heat exchanger 1 by using frontal water jets, thereby significantly reducing the risk of mud and ash being transferred into the heat exchanger, ensuring the flow capacity of the evaporative heat exchanger 1.

[0026] In this embodiment, the water spray channel is a combination of one or more spray holes, water spray troughs or nozzles. To ensure the flushing effect on the evaporative heat exchanger 1, the water sprayed from the water spray channel in this embodiment covers the entire windward surface of the evaporative heat exchanger 1.

[0027] The heat exchanger online flushing device in this embodiment also includes two guide rails 3 respectively provided at the two ends of the flushing pipe 2. The two guide rails 3 are fixed above the evaporative heat exchanger 1 by a bracket, and the two guide rails 3 are parallel to each other. It also includes a telescopic mechanism 4, which is used to control the reciprocating movement of the flushing pipe 2 in a direction perpendicular to the windward side of the evaporative heat exchanger 1. By adjusting the relative position of the flushing pipe 2 through the telescopic mechanism 4, efficient flushing of the mud inside the evaporative heat exchanger 1 can be achieved, further avoiding the problem of blockage. The telescopic mechanism 4 in this embodiment is a hydraulic telescopic rod or a stepping drive. Other drive structures that can realize the movement of the flushing pipe 2 in a direction perpendicular to the windward side are also applicable to the present utility model.

[0028] The heat exchanger online flushing device in this embodiment also includes a water receiving tray 5, which is fixed directly below the evaporative heat exchanger 1. The water receiving tray 5 is also provided with a guide pipe 6, which can guide the mud flowing down from the flushing to the outside of the water receiving tray 5.

[0029] The guide pipe 6 in this embodiment is further provided with a filter 7, and the filter 7 is used to perform solid-liquid separation on the material transported in the guide pipe 6, thereby separating the flushing water and solid sludge particles in the mud, and facilitating the recovery and treatment of the sludge particles.

[0030] The separated flushing water can be discharged directly or circulated into the flushing pipe 2 to realize the recycling of the flushing water and save water. As described in this embodiment, the flushing pipe 2 is connected to the booster water pump 8, and the end of the guide pipe 6 away from the water receiving tray 5 is connected to the inlet end of the booster water pump 8. The booster water pump 8 realizes the secondary input of the flushing water into the flushing pipe 2, realizing the recycling of the flushing water.

[0031] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An online flushing device for a heat exchanger of a sludge drying device, characterized in that: It comprises a flushing pipe (2) arranged directly above the evaporative heat exchanger (1), wherein the bottom surface of the flushing pipe (2) is provided with a water spraying channel, and the water spraying channel is used to spray water toward the windward surface of the evaporative heat exchanger (1).

2. The heat exchanger online flushing device for sludge drying equipment according to claim 1 is characterized in that: The water spray channel is a combination of one or more of a spray hole, a water spray trough or a nozzle, and the water sprayed from the water spray channel covers the entire windward surface of the evaporative heat exchanger (1).

3. The heat exchanger online flushing device for sludge drying equipment according to claim 1 is characterized in that: It also includes two guide rails (3) respectively arranged at the two ends of the flushing pipe (2), the two guide rails (3) being fixed above the evaporative heat exchanger (1) via brackets, and the two guide rails (3) being parallel to each other; and it also includes a telescopic mechanism (4), the telescopic mechanism (4) being used to control the flushing pipe (2) to move back and forth in a direction perpendicular to the windward surface of the evaporative heat exchanger (1).

4. The heat exchanger online flushing device for sludge drying equipment according to claim 3 is characterized in that: The telescopic mechanism (4) is a hydraulic telescopic rod or a stepping drive.

5. The heat exchanger online flushing device for sludge drying equipment according to claim 1, characterized in that: It also includes a water receiving tray (5), which is fixed directly below the evaporative heat exchanger (1), and a flow guide pipe (6) is provided on the water receiving tray (5).

6. The heat exchanger online flushing device for sludge drying equipment according to claim 5, characterized in that: The guide tube (6) is further provided with a filter (7), and the filter (7) is used for performing solid-liquid separation on the material transported in the guide tube (6).

7. The heat exchanger online flushing device for sludge drying equipment according to claim 6, characterized in that: The flushing pipe (2) is in communication with the boosting water pump (8), and one end of the flow guide pipe (6) away from the water receiving tray (5) is connected to the inlet end of the boosting water pump (8).

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