Spiral finned tube economizer convenient to clean

Abstract

The utility model relates to the technical field of economizers, and discloses a conveniently-cleaned spiral finned tube economizer which comprises an economizer shell, a plurality of spiral finned tubes are arranged in the economizer shell, and the ends, extending out of the economizer shell, of the spiral finned tubes are provided with bent tubes in a communicating mode. The spiral finned tubes and the bent tubes are combined into a coherent water pipeline, a water inlet and a water outlet of the water pipeline extend out of the economizer shell, a cleaning driving frame is detachably arranged on the side, parallel to the spiral finned tubes, of the economizer shell, and a cleaning mechanism is arranged on one side of the cleaning driving frame. The cleaning mechanism comprises a water tank, a water delivery pump, a corrugated pipe and a high-pressure water gun, a fixing base used for clamping the high-pressure water gun is arranged in the cleaning driving frame, and a driving assembly is arranged in the cleaning driving frame corresponding to movement of the fixing base. The coal economizer has the effects that accumulated scales of the spiral finned tubes can be cleaned conveniently, and the heat exchange efficiency of the coal economizer is improved.

Description

Technical Field

[0001] The present application relates to the technical field of economizers, and in particular to a spiral fin tube economizer that is easy to clean. Background Art

[0002] Economizer is a device installed at the bottom of the flue at the tail of the boiler to recover the waste heat of the exhaust gas. It heats the boiler feed water into a heating surface of saturated water under drum pressure. Because it absorbs the heat of high-temperature flue gas, it reduces the exhaust temperature of the flue gas, saves energy and improves efficiency, so it is called an economizer. The spiral finned tube economizer has spiral fins on the heating surface of its heat transfer tube, so its heat conduction efficiency is higher than that of the bare tube economizer of the same specification. It not only increases the contact area between the flue gas flow and the heating surface inside the economizer, but also reduces the wind speed of the flue gas flow, thereby improving the heat exchange efficiency of the economizer.

[0003] The spiral fin tube economizer in the prior art passes hot flue gas for a long time, and the fly ash particles mixed in the hot flue gas are easily hidden in the roots of the fins and gradually accumulate into scale. The presence of scale affects the heat exchange between the hot flue gas and the outer wall of the spiral fin tube, thereby reducing the heat exchange efficiency of the spiral fin tube economizer.

[0004] In order to improve the cleanliness of the spiral finned tube economizer and thus the heat exchange efficiency, the staff is required to clean the scale on the spiral finned tube regularly. The commonly used cleaning method is for the staff to use a high-pressure water gun to flush the inside of the economizer at a close distance. However, this method of removing scale usually requires the staff to move the economizer to a specific cleaning site, and then use a high-pressure water gun to flush it in a disorderly manner. In order to improve the cleanliness of the economizer, the staff is required to clean each spiral finned tube in place, which results in a large cleaning workload and low cleaning efficiency. Utility Model Content

[0005] In order to facilitate the cleaning of scale deposits on spiral fin tubes and improve the heat exchange efficiency of the economizer, the present application provides a spiral fin tube economizer that is easy to clean.

[0006] The present application provides a spiral fin tube economizer that is easy to clean and adopts the following technical solution:

[0007] A spiral fin tube economizer which is easy to clean, comprises an economizer shell, wherein a plurality of spiral fin tubes are arranged in the economizer shell, and the ends of the plurality of spiral fin tubes extending out of the economizer shell are connected with elbows, and the plurality of spiral fin tubes and the elbows are combined into a continuous water conduit, and the water inlet and the water outlet of the water conduit both extend out of the economizer shell, and a cleaning drive frame is detachably provided on one side of the economizer shell parallel to the spiral fin tubes, and a cleaning mechanism is provided on one side of the cleaning drive frame, and the cleaning mechanism comprises a water tank, a water pump, a bellows and a high-pressure water gun, and a fixing seat for clamping the high-pressure water gun is provided in the cleaning drive frame, and a driving assembly is provided inside the cleaning drive frame corresponding to the movement of the fixing seat.

[0008] By adopting the above technical scheme, after the spiral fin tube economizer finishes working, it only needs to install a cleaning drive frame on the shell, and fix the high-pressure water gun on the fixed seat so that the water nozzle of the high-pressure water gun is aimed at the outer walls of several spiral fin tubes, and then use the driving assembly to drive the fixed seat to move in the cleaning drive frame. The movement of the fixed seat moves with the high-pressure water gun synchronously, so as to realize the comprehensive flushing of the outer walls of several spiral fin tubes in the shell by the high-pressure water gun, replacing the manual disorderly flushing method, improving the work efficiency of cleaning scale, and at the same time improving the heat exchange efficiency of the economizer after cleaning.

[0009] Optionally, limit frames are slidably arranged in the vertical and horizontal directions in the cleaning drive frame, and the sliding of the two limit frames in the cleaning drive frame does not interfere with each other. Each limit frame has a limit groove along its own length direction, and each limit groove has a limit block slidably arranged, and several of the limit blocks are arranged on a fixed seat.

[0010] By adopting the above technical solution, the setting of each limit groove is limited by the movement of the corresponding limit frame. When the limit frame slides along the guide of the limit groove, the inner side wall of the limit groove pushes the fixed seat to slide along the guide of the limit groove synchronously. The fixed seat is always located at the intersection of the two limit frames, and under the drive of the two limit frames, the fixed seat can move fully along the inside of the cleaning drive frame, thereby driving the high-pressure water gun to fully clean the inside of the economizer.

[0011] Optionally, guide grooves are provided on the side walls of the cleaning drive frame near the ends of the limit frame, and guide blocks are slidably arranged in each of the guide grooves. The guide blocks are connected to the corresponding ends of the limit frame. The driving assembly includes a screw rotatably arranged in the guide groove and a motor driving the screw to rotate, and the screw rotates through the corresponding guide block through a thread.

[0012] By adopting the above technical solution, the motor is driven to work, and the output shaft of the motor rotates to drive the screw to rotate synchronously. Under the guide limit of the guide groove, the rotation of the screw drives the guide block to slide along the length direction of the first guide groove, thereby realizing the flexible movement of the high-pressure water gun in the cleaning drive frame.

[0013] Optionally, a baffle is vertically inserted on a side of the economizer shell away from the cleaning drive frame, and a dirt collecting box is installed in communication with the bottom of the economizer shell.

[0014] By adopting the above technical solution, when the spiral fin tube economizer finishes working, the staff installs the cleaning drive frame on the economizer shell, and plugs the baffle into the economizer shell at the same time. When the high-pressure water gun fixed on the cleaning drive frame flushes and cleans the inside of the economizer, the water flushed by the high-pressure water gun passes through several spiral fin tubes and hits the baffle, and then is reflected from the baffle to several spiral fin tubes close to the baffle side, making the flushing more thorough. At this time, the flushing water is collected in the dirt collecting box along with the diversion of the baffle and the inner wall of the shell, and the operator does not need to specially move it to the cleaning site, thereby improving the application scope of the economizer and improving the cleanliness of the economizer.

[0015] Optionally, a plug-in slot is provided on the side wall of the dirt collecting box and connected to the inner cavity. A filter screen frame is inserted into the plug-in slot, and the filter screen frame divides the dirt collecting box into two spaces vertically. A handle is provided on the side wall of the filter screen frame away from the dirt collecting box.

[0016] By adopting the above technical solution, the pull-out filter frame on the sewage collecting box can separate larger impurities from the liquid in the sewage collected during cleaning, making it easier for operators to carry out classification and processing later.

[0017] Optionally, filter cotton is placed in the filter frame, and the filter cotton covers all mesh holes of the filter frame. A water outlet pipe is provided on the side wall of the dirt collecting box near the bottom and connected to the lower inner cavity, and the water outlet pipe is connected to the water tank.

[0018] By adopting the above technical solution, the filter cotton is arranged to absorb and clean the dust impurities in the sewage, purify the sewage, and make the clean filtrate filtered into the lower inner cavity of the sewage collection box enter the water tank through the outlet pipe, and be used again for cleaning the spiral fin tube economizer, thereby saving water resources and improving the utilization effect of water resources. When the filter cotton is full of sludge, the operator only needs to pull open the filter frame, clean the filter cotton, and put it back into the filter frame to continue cleaning and filtering the sewage.

[0019] Optionally, the plurality of spiral finned tubes are parallel to each other in the horizontal direction, and the spiral finned tubes in two adjacent rows of tube bundles are staggered, and the spiral finned tubes in one row of tube bundles are located between two adjacent spiral finned tubes in another row of tube bundles.

[0020] By adopting the above technical solution, the tube bundles are arranged in a staggered manner, which increases the flow direction of the hot flue gas, improves the turbulence of the flue gas, enhances the heat transfer effect, reduces ash accumulation in the pipes, and increases the probability of collision between large particles in the flue gas, thereby reducing pipe wear.

[0021] Optionally, the spiral fins in two adjacent rows of tube bundles rotate in opposite directions, and the spiral fins in the same row of tube bundles rotate in the same direction.

[0022] By adopting the above technical scheme, the rotation directions of the spiral fins between two adjacent tube rows are arranged in opposite directions, so that the airflow changes direction continuously, the disturbance of the airflow between the tubes is strengthened, and the heat exchange and wear resistance of the pipeline are enhanced; at the same time, the rotation directions of the fins between two adjacent vertical tube rows are arranged in opposite directions, which strengthens the airflow disturbance between the tubes and enhances the heat exchange efficiency, while avoiding the smoke from deflecting in the same direction, which not only reduces the wear of the local pipeline caused by the scouring of high-speed smoke, but also the dust on the back of the fin is increased by the flue gas scouring guided by the adjacent reverse spiral fin tube, thereby reducing the dust accumulation of the fin tube.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. After the spiral fin tube economizer finishes working, it only needs to install the cleaning drive frame on the shell, insert and fix the high-pressure water gun on the fixed seat, aim the water nozzle of the high-pressure water gun at the outer wall of several spiral fin tubes, and then use the driving assembly to drive the fixed seat to move in the cleaning drive frame. The movement of the fixed seat moves the high-pressure water gun synchronously, so as to achieve the comprehensive flushing of the outer wall of several spiral fin tubes in the shell by the high-pressure water gun, replacing the manual disorderly flushing method, improving the efficiency of cleaning the scale, and also improving the heat exchange efficiency of the economizer after cleaning;

[0025] 2. Each limit slot is set with the movement limit of the corresponding limit frame. When the limit frame slides along the guide of the limit slot, the inner wall of the limit slot pushes the fixed seat to slide along the guide of the limit slot synchronously. The fixed seat is always located at the intersection of the two limit frames, and driven by the two limit frames, the fixed seat can move fully along the inside of the cleaning drive frame, thereby driving the high-pressure water gun to fully clean the inside of the economizer;

[0026] 3. Drive the motor to work, the output shaft of the motor rotates to drive the screw to rotate synchronously, and under the guide limit of the guide slot, the rotation of the screw drives the guide block to slide along the length direction of the first guide slot, thereby realizing the flexible movement of the high-pressure water gun in the cleaning drive frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram showing the internal structure of several spiral fin tubes and a dirt collecting box in an embodiment of the present application.

[0029] Figure 3 It is an exploded view of the internal structure of the cleaning drive frame in the embodiment of the present application.

[0030] Description of reference numerals:

[0031] 1. Economizer shell; 2. Spiral fin tube; 21. Elbow; 3. Water pipe; 31. Water inlet; 32. Water outlet; 4. Cleaning drive frame; 41. Guide slide; 411. Guide block; 42. Limit frame; 421. Limit groove; 4211. Limit block; 5. Cleaning mechanism; 51. Water tank; 52. Water pump; 53. Bellows; 54. High-pressure water gun; 6. Fixed seat; 7. Drive assembly; 71. Screw; 72. Motor; 8. Baffle; 9. Dirt collecting box; 91. Plug slot; 92. Filter frame; 921. Filter cotton; 922. Handle; 93. Water outlet pipe; 931. Water pump. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-3 This application is described in further detail.

[0033] The embodiment of the present application discloses a spiral fin tube economizer which is easy to clean.

[0034] Reference Figure 1 and Figure 2A spiral finned tube economizer that is easy to clean includes an economizer shell 1, a plurality of spiral finned tubes 2 are installed in parallel in the economizer shell 1, and the ends of the plurality of spiral finned tubes 2 extending out of the economizer shell 1 are connected and installed with an elbow 21, and the plurality of spiral finned tubes 2 and the elbow 21 are combined into a continuous water pipe 3, and the water inlet 31 and the water outlet 32 ​​of the water pipe 3 are extended out of the economizer shell 1, and a cleaning drive frame 4 is vertically inserted on one side of the economizer shell 1 parallel to the spiral finned tube 2, and a cleaning mechanism 5 is arranged on one side of the cleaning drive frame 4, and a fixed seat 6 is arranged in the cleaning drive frame 4, and a driving assembly 7 is arranged inside the cleaning drive frame 4 corresponding to the movement of the fixed seat 6. A baffle 8 is vertically inserted on the side of the economizer shell 1 away from the cleaning drive frame 4, and a dirt collecting box 9 is also connected and installed at the bottom of the economizer shell 1.

[0035] Reference Figure 1 The cleaning mechanism 5 in this embodiment includes a water tank 51, a water pump 52, a bellows 53 and a high-pressure water gun 54. After the spiral fin tube 2 economizer finishes working, it only needs to install the cleaning drive frame 4 and the baffle 8 on the shell, and install the high-pressure water gun 54 on the fixed seat 6 by threaded rotation, so that the water nozzle of the high-pressure water gun 54 is aimed at the several spiral fin tubes 2 in the economizer shell 1, and then the driving component 7 is used to drive the fixed seat 6 to move in the cleaning drive frame 4. The movement of the fixed seat 6 is synchronously moved with the high-pressure water gun 54, so that the high-pressure water gun 54 can fully flush the outer walls of the several spiral fin tubes 2 in the shell, and the sewage generated during cleaning enters the sewage collecting box 9 along with the diversion of the economizer shell 1 and the baffle 8.

[0036] Reference Figure 2 In this embodiment, the plurality of spiral finned tubes 2 are arranged parallel to each other in the horizontal direction, and the spiral finned tubes 2 of two adjacent rows of tube bundles are staggered, the spiral finned tube 2 in the same row of tube bundles is located between two adjacent spiral finned tubes 2 in another row of tube bundles, and the spiral fins of the two adjacent rows of tube bundles rotate in opposite directions, while the spiral fins of the same row of tube bundles rotate in the same direction.

[0037] Reference Figure 1 and Figure 3, the opposite sides of the two side walls of the cleaning drive frame 4 are provided with guide slots 41 in the vertical direction, and a guide block 411 is slidably arranged in each guide slot 41, and a limit frame 42 is fixedly connected between the two guide blocks 411 arranged opposite to each other, and the two limit frames 42 do not interfere with each other when sliding in the cleaning drive frame 4. The driving assembly 7 is provided with one limit frame 42 corresponding to the horizontal and vertical movement, and each driving assembly 7 includes a screw rod 71 and a motor 72, the screw rod 71 is rotatably arranged in the guide slot 41 along the length direction of the guide slot 41, and is rotatably penetrated by the guide block 411 in the corresponding guide slot 41 through the thread. The motor 72 is fixedly arranged on the outer wall of the cleaning drive frame 4, and its output shaft is rotatably penetrated by the side wall of the cleaning drive frame 4 and extends to the inside of the guide slot 41, and is coaxially fixedly connected with the screw rod 71.

[0038] Reference Figure 1 and Figure 3 Each limiting frame 42 has a limiting groove 421 along its length direction, each limiting groove 421 has a limiting block 4211 slidably arranged therein, and each limiting block 4211 is fixedly arranged on the fixing seat 6 .

[0039] Reference Figure 1 and Figure 2 The side wall of the dirt collecting box 9 is connected to the inner cavity and is provided with a plug-in slot 91. A filter screen frame 92 is plugged into the plug-in slot 91. Filter cotton 921 is placed in the filter screen frame 92, and the filter cotton 921 covers all meshes of the filter screen frame 92. The filter screen frame 92 divides the dirt collecting box 9 into two spaces vertically. A water outlet pipe 93 is fixedly penetrated on the side wall of the lower space in the dirt collecting box 9 and connected to the lower inner cavity. The water outlet end of the water outlet pipe 93 is connected to and fixedly penetrated through the top wall of the water tank 51. A water pump 931 is fixedly set on the top wall of the water tank 51, and the water pump 931 is connected and arranged in the middle of the water outlet pipe 93.

[0040] Reference Figure 1 In order to facilitate pulling and carrying, handles 922 are fixedly provided on the top wall of the cleaning drive frame 4 and the baffle 8 and the side wall of the filter frame 92 in this embodiment.

[0041] The implementation principle of the spiral fin tube economizer that is easy to clean in the embodiment of the present application is as follows: after the spiral fin tube 2 economizer finishes working, it only needs to install the cleaning drive frame 4 and the baffle 8 on the shell, and the high-pressure water gun 54 is installed on the fixed seat 6 by threaded rotation, so that the water spray port of the high-pressure water gun 54 is aimed at the several spiral fin tubes 2 in the economizer shell 1, and then the motor 72 is used to drive the screw 71 to rotate, thereby driving the fixed seat 6 to move in the cleaning drive frame 4, and the movement of the fixed seat 6 is synchronously moved with the high-pressure water gun 54, so that the high-pressure water gun 54 can fully flush the outer walls of the several spiral fin tubes 2 in the shell.

[0042] The sewage generated during cleaning enters the sewage collecting box 9 along with the guidance of the economizer shell 1 and the baffle 8. The clean water in the sewage collecting box 9 filtered by the filter cotton 921 flows into the water tank 51 again through the outlet pipe 93, and continues to circulate and flush the inside of the economizer.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A spiral finned tube economizer that is easy to clean, comprising an economizer shell (1), wherein a plurality of spiral finned tubes (2) are arranged in the economizer shell (1), and ends of the plurality of spiral finned tubes (2) extending out of the economizer shell (1) are connected to an elbow (21), the plurality of spiral finned tubes (2) and the elbow (21) are combined into a continuous water pipe (3), and a water inlet (31) and a water outlet (32) of the water pipe (3) both extend out of the economizer shell (1), characterized in that: A cleaning drive frame (4) is detachably provided on one side of the economizer shell (1) parallel to the spiral fin tube (2); a cleaning mechanism (5) is provided on one side of the cleaning drive frame (4); the cleaning mechanism (5) comprises a water tank (51), a water pump (52), a bellows (53) and a high-pressure water gun (54); a fixing seat (6) for clamping the high-pressure water gun (54) is provided inside the cleaning drive frame (4); and a driving component (7) is provided inside the cleaning drive frame (4) corresponding to the movement of the fixing seat (6).

2. The spiral fin tube economizer that is easy to clean according to claim 1, characterized in that: A limit frame (42) is slidably arranged in the vertical direction and in the horizontal direction in the cleaning drive frame (4); the two limit frames (42) do not interfere with each other when sliding in the cleaning drive frame (4); each limit frame (42) is provided with a limit groove (421) along its own length direction; each limit groove (421) is slidably arranged with a limit block (4211); and a plurality of the limit blocks (4211) are arranged on a fixed seat (6).

3. The spiral fin tube economizer that is easy to clean according to claim 2, characterized in that: The cleaning drive frame (4) is provided with a guide slot (41) on the side wall near the end of the limit frame (42), and a guide block (411) is slidably arranged in each of the guide slots (41), and the guide block (411) is connected to the corresponding end of the limit frame (42). The driving component (7) includes a screw (71) rotatably arranged in the guide slot (41) and a motor (72) driving the screw (71) to rotate, and the screw (71) passes through the corresponding guide block (411) through threaded rotation.

4. The spiral fin tube economizer that is easy to clean according to claim 1, characterized in that: A baffle (8) is vertically inserted on the side of the economizer shell (1) away from the cleaning drive frame (4), and a dirt collecting box (9) is connected and installed at the bottom of the economizer shell (1).

5. The spiral fin tube economizer that is easy to clean according to claim 4, characterized in that: A plug-in slot (91) is provided on the side wall of the dirt collecting box (9) and communicates with the inner cavity. A filter screen frame (92) is plugged into the plug-in slot (91), and the filter screen frame (92) divides the dirt collecting box (9) into two spaces along the vertical direction. A handle (922) is provided on the side wall of the filter screen frame (92) away from the dirt collecting box (9).

6. The spiral fin tube economizer that is easy to clean according to claim 5, characterized in that: Filter cotton (921) is placed in the filter frame (92), and the filter cotton (921) covers all mesh holes of the filter frame (92). A water outlet pipe (93) is provided on the side wall of the dirt collecting box (9) close to the bottom and connected to the lower inner cavity, and the water outlet pipe (93) is connected to the water tank (51).

7. The spiral fin tube economizer that is easy to clean according to claim 1, characterized in that: The plurality of spiral finned tubes (2) are parallel to each other in the horizontal direction, and the spiral finned tubes (2) in two adjacent rows of tube bundles are staggered, with the spiral finned tubes (2) in one row of tube bundles being located between two adjacent spiral finned tubes (2) in another row of tube bundles.

8. The spiral fin tube economizer that is easy to clean according to claim 7, characterized in that: The spiral fins of two adjacent rows of tube bundles rotate in opposite directions, and the spiral fins of the same row of tube bundles rotate in the same direction.

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