Energy-saving and environmentally friendly boiler

Abstract

An energy-saving and environmentally friendly boiler relates to the technical field of boilers. There is an inlet pipe at the bottom of the furnace, which is connected to the bottom of the furnace through a water pump, and the top of the furnace is connected to the outlet pipe. Several layers of coils are installed in the furnace along the height direction. The coils are spirally ascending elastic metal tubes. The lower end of the spiral tube of the coil extends out of the furnace to connect to the manifold, and the upper end of the spiral tube of the coil extends out of the furnace to connect to the manifold. An electric heating rod is installed at the lower part of the manifold, and the electric heating rod extends into the lower end of the spiral tube of the coil. The coils and the manifold are filled with heat transfer oil. The beneficial effect of the present invention is that the technical solution of the present invention sets the electric heating rod to work continuously, and uses the variable frequency control of the water pump to output a pulse frequency at intervals. The flow rate input into the furnace by the water pump undergoes a pulse change, so that the water temperature outside each layer of the coil undergoes a pulse change, so that the coil expands and contracts and vibrates alternately, and the scale is separated from the coil by the pulse vibration of the coil, thereby playing a descaling role.

Description

Technical Field

[0001] The invention relates to the technical field of boilers, and in particular to an energy-saving and environment-friendly boiler. Background Art

[0002] Boilers are used to generate steam or hot water. They are mechanical devices that use the heat energy of fuel or other energy sources to heat water or turn it into steam. In the applicant's previous application, a new type of coil-type electric heating coil was developed and studied, such as CN106123306A. The electric heating device includes a left pipe box, a right pipe box and a floating coil. The floating coil is connected to the left pipe box and the right pipe box to form a closed circulation of heating fluid. The left pipe box, the right pipe box and the floating coil are filled with heating fluid, so that the elastic tube bundle vibrates due to the expansion of the fluid caused by heating, thereby achieving heating and descaling effects.

[0003] However, the study found that when the coil is arranged horizontally, the fluid in the coil cannot form effective convection, the fluid mobility is very low, or the flow rate is stable, which greatly weakens the vibration performance of the coil, thereby affecting the descaling and heating efficiency of the coil. In other technical solutions, an intermittent heating method of supplying power to the electric heating rod is used to increase the vibration of the coil. On the one hand, it affects the heating efficiency, and on the other hand, it also reduces the service life of the electric heating rod and has high maintenance costs. Summary of the invention

[0004] The present invention aims at the deficiencies of boilers in the prior art and provides an electric heating boiler with a novel coil layout arrangement, which can automatically remove scale, improve heating efficiency, and save energy and protect the environment.

[0005] The technical solution provided by the present invention is: an energy-saving and environmentally friendly boiler, comprising a furnace, the furnace is a cylindrical structure, the cylindrical furnace is placed vertically, a water inlet pipe is arranged at the lower part of the furnace, the water inlet pipe is connected to the water pump inlet, the water pump outlet is connected to the bottom of the furnace, the top of the furnace is connected to the water outlet pipe, a plurality of layers of coils are installed in the furnace along the height direction, the coils are spirally ascending elastic metal tubes, the lower end of the spiral tube of the coil extends out of the furnace to connect to the manifold, the upper end of the spiral tube of the coil extends out of the furnace to connect to the manifold, an electric heating rod is installed at the lower part of the manifold, the electric heating rod extends into the lower end of the spiral tube of the coil, and the coils and the manifold are filled with heat transfer oil;

[0006] The water pump is controlled by frequency conversion. The power supply frequency of the frequency conversion is set to output a pulse frequency at a certain interval. The high-frequency amplitude and low-frequency amplitude of the pulse frequency of the frequency conversion are the same.

[0007] A pulse damper and a temperature sensor are installed on the water outlet pipe.

[0008] The upper end of the spiral tube of the coil is connected by a fixed end and a movable end on the inner side of the furnace. The fixed end extends out of the furnace to connect to the manifold. The movable end is the end of the coil located there. The movable end extends into the inner hole of the fixed end. The movable end is connected to the fixed end through the gap fit of the sealing ring.

[0009] A vibration mechanism is provided at the movable end of the furnace, and the vibration mechanism includes a base fixed inside the furnace, a horizontal arm is welded on the movable end of the coil, the other end of the horizontal arm is a pressure head, and the right side of the pressure head is a slope surface E, and the slope surface E of the pressure head is connected to the vertical arm through a dovetail groove guide rail, and the vertical arm is guided and connected to the base, and the base is also guided and connected to the vibration rod, and a compression spring is provided between the vibration rod and the base, the upper part of the vibration rod is pressed against the lower end of the horizontal arm, and a locking block is provided on the vibration rod, a sliding block is provided on the vertical arm, and a compression spring is provided between the sliding block and the vertical arm, and an unlocking tongue is installed on the base, and the upper part of the unlocking tongue is a slope surface B, the lower part of the sliding block is a slope surface A, the left side of the sliding block is a slope surface C, and the lower part of the locking block is a slope surface D.

[0010] The action mechanism of the above-mentioned vibration mechanism is: when the coil expands, the cross arm moves horizontally to the right, the pressure head drives the vertical arm to descend through the dovetail groove guide rail, the slider connected to the vertical arm presses the lock block to drive the vibration rod to descend, and when the slope surface A on the vertical arm touches the slope surface B on the unlocking tongue, the slider moves to the right, the vibration rod is released, and the vibration rod hits the cross arm under the action of the compression spring. When the coil shrinks, the cross arm moves to the left, the vertical arm rises, and the slope surface C of the slider passes over the slope surface D of the lock block and returns to the top of the lock block.

[0011] Two Y-type filters are connected in parallel on the water outlet pipe, and each Y-type filter is provided with a ball valve at the front and rear ends.

[0012] The beneficial effects of the present invention are as follows: the heat transfer oil is heated at the position of the electric heating rod and flows upward in the furnace. The heat transfer oil above the coil flows out of the furnace after heat exchange and flows downward in the manifold to form convection, thereby improving the heating efficiency of the electric heating rod. Each layer of coils is provided with an electric heating rod; each forms heat transfer oil convection, thereby preventing the problem of uneven flow distribution and reduced heating efficiency when sharing one (or a group of) electric heating rods.

[0013] The technical solution of the present invention sets the electric heating rod to work continuously, and uses the variable frequency control of the water pump to output a pulse frequency at a certain interval. The flow rate input into the furnace by the water pump undergoes a pulse change, so that the water temperature outside each layer of the coil undergoes a pulse change, thereby causing the coil to expand and contract and vibrate alternately, and the scale is separated from the coil by the pulse vibration of the coil, thereby achieving a descaling effect. Since the high-frequency amplitude and low-frequency amplitude of the variable frequency pulse frequency of the water pump are the same, the overall flow rate remains unchanged, and the heating efficiency is not reduced while descaling, thereby extending the service life of the electric heating rod;

[0014] By setting up a vibration mechanism, each time the flow of the water pump changes in a pulse, the vibration rod strikes the coil, further improving the descaling effect, maintaining the heat exchange efficiency of the coil, improving the heating efficiency of the boiler, reducing energy waste caused by boiler scaling, and saving energy and protecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a structural schematic diagram of the present invention.

[0016] Attached Figure 2 Yes Figure 1 CC cross-section diagram.

[0017] Attached Figure 3 It is a frequency waveform diagram of the variable frequency pulse of the water pump in the present invention.

[0018] Attached Figure 4 Yes Figure 2 Enlarged view of point A.

[0019] Attached Figure 5 It is a structural schematic diagram of the vibration mechanism in the present invention.

[0020] Attached Figure 6 Yes Figure 5 Magnified image of .

[0021] In the figure: 1-furnace, 2-coil, 3-manifold, 4-electric heating rod, 5-water inlet pipe, 6-water pump, 7-water outlet pipe, 8-pulsation damper, 9-temperature sensor, 10-fixed end, 11-movable end, 12-cross arm, 13-vertical arm, 14-base, 15-vibration rod, 16-slider, 17-locking block, 18-unlocking tongue, 19-slope surface A, 20-slope surface B, 21-pressure head, 22-slope surface C, 23-slope surface D, 24-slope surface E. 25-Y-type filter. DETAILED DESCRIPTION

[0022] like Figures 1 to 6As shown, an energy-saving and environmentally friendly boiler comprises a furnace 1, which is a cylindrical structure. The cylindrical furnace 1 is placed vertically. A water inlet pipe 5 is arranged at the bottom of the furnace 1. The water inlet pipe 5 is connected to the inlet of a water pump 6. The outlet of the water pump 6 is connected to the bottom of the furnace 1. The top of the furnace 1 is connected to the water outlet pipe 7. Several layers of coils 2 are installed in the furnace 1 along the height direction. The coils 2 are elastic metal pipes that rise in a spiral. The lower end of the spiral tube of the coil 2 extends out of the furnace 1 to connect to the manifold 3. The upper end of the spiral tube of the coil 2 extends out of the furnace 1 to connect to the manifold 3. The lower part of the manifold 3 is installed There is an electric heating rod 4, which extends into the lower end of the spiral tube of the coil 2. The coil 2 and the manifold 3 are filled with heat transfer oil. The heat transfer oil is heated at the position of the electric heating rod 4 and flows upward in the furnace 1. The heat transfer oil above the coil 2 flows out of the furnace 1 after heat exchange and flows downward in the manifold 3 to form convection, thereby improving the heating efficiency of the electric heating rod 4. Each layer of the coil 2 is provided with an electric heating rod 4; each forms heat transfer oil convection, thereby preventing the problem of uneven flow distribution and reduced heating efficiency when sharing one (or a group of) electric heating rods;

[0023] The water pump 6 is frequency-controlled, and the power supply frequency of the frequency conversion is set to output a pulse frequency at a certain interval. The high-frequency amplitude and the low-frequency amplitude of the pulse frequency of the frequency conversion are the same. The technical solution of the present invention sets the electric heating rod 4 to work continuously, and utilizes the frequency conversion control of the water pump 6 to output a pulse frequency at a certain interval. The flow rate input into the furnace 1 by the water pump 6 undergoes a pulse change, so that the water temperature outside each layer of the coil 2 undergoes a pulse change, thereby causing the coil 2 to expand and contract and vibrate alternately, and the scale is separated from the coil 2 by the pulse vibration of the coil 2, thereby playing a descaling role. Since the high-frequency amplitude and the low-frequency amplitude of the pulse frequency of the frequency conversion of the water pump 6 are the same, the overall flow rate remains unchanged, and the heating efficiency is not reduced while descaling, thereby extending the service life of the electric heating rod 4;

[0024] A pulse damper 8 is installed on the water outlet pipe 7 to reduce the pulse flow change of the coefficient water pump 6 and lower the peak value of the overall output flow change. A temperature sensor 9 is installed on the water outlet pipe 7 for temperature control.

[0025] The upper end of the spiral tube of the coil 2 is connected by a fixed end 10 and a movable end 11 on the inner side of the furnace 1. The fixed end 10 extends out of the furnace 1 to connect to the manifold 3. The movable end 11 is the end of the coil 2 located there. The movable end 11 extends into the inner hole of the fixed end 10. The movable end 11 is connected to the fixed end 10 through a sealing ring clearance fit. The use of a movably connected coil 2 can prevent the coil 2 from tearing at the fixed furnace 1 position when expanding and contracting, thereby increasing the amplitude of the coil 2.

[0026] See attached Figures 5-6A vibration mechanism is provided at the movable end 11 of the furnace 1. The vibration mechanism includes a base 14 fixed inside the furnace 1. A horizontal arm 12 is welded on the movable end 11 of the coil 2. The other end of the horizontal arm 12 is a pressure head 21. The right side of the pressure head 21 is a slope surface E24. The slope surface E24 of the pressure head 21 is connected to the vertical arm 13 through a dovetail groove guide rail. The vertical arm 13 is guided and connected with the base 14. The base 14 is also guided and connected with a vibration rod 15. A compression spring is provided between the vibration rod 15 and the base 14. The upper part of the vibration rod 15 is pressed against the lower end of the horizontal arm 12. A locking block 17 is provided on the vibration rod 15. A slider 16 is provided on the vertical arm 13. A compression spring is provided between the slider 16 and the vertical arm 13. An unlocking tongue 18 is installed on the base 14. The unlocking tongue 18 has a slope surface B20 on the top, a slope surface A19 on the bottom of the slider 16, a slope surface C22 on the left side of the slider 16, and a slope surface D23 below the locking block 17.

[0027] The action mechanism of the above-mentioned vibration mechanism is: when the coil 2 expands, the cross arm 12 moves horizontally to the right, the pressure head 21 drives the vertical arm 13 to descend through the dovetail groove guide rail, and the slider 16 connected to the vertical arm 13 presses the lock block 17 to drive the vibration rod 15 to descend. When the slope surface A19 on the vertical arm 13 touches the slope surface B20 on the unlocking tongue 18, the slider 16 moves to the right, and the vibration rod 15 is released. The vibration rod 15 hits the cross arm 12 under the action of the compression spring. When the coil 2 shrinks, the cross arm 12 moves to the left, the vertical arm 13 rises, and the slope surface C22 of the slider 16 passes over the slope surface D23 of the lock block 17 and returns to the top of the lock block 17. By setting the vibration mechanism, each time the flow of the water pump 6 changes in a pulse, the vibration rod 15 hits the coil 2, thereby further improving the descaling effect.

[0028] Two Y-type filters 25 are connected in parallel to the water outlet pipe 7. A ball valve is provided at the front and rear ends of each Y-type filter 25 so as to clean the scale alternately.

Claims

1. An energy-saving and environmentally friendly boiler, comprising a furnace (1), characterized in that: The furnace (1) is a cylindrical structure. The cylindrical furnace (1) is placed vertically. A water inlet pipe (5) is provided at the bottom of the furnace (1). The water inlet pipe (5) is connected to the inlet of a water pump (6). The outlet of the water pump (6) is connected to the bottom of the furnace (1). The top of the furnace (1) is connected to the water outlet pipe (7). Several layers of coils (2) are installed in the furnace (1) along the height direction. The coils (2) are spirally ascending elastic metal tubes. The lower end of the spiral tube of the coil (2) extends out of the furnace (1) to connect to the manifold (3). The upper end of the spiral tube of the coil (2) extends out of the furnace (1) to connect to the manifold (3). An electric heating rod (4) is installed at the bottom of the manifold (3). The electric heating rod (4) extends into the lower end of the spiral tube of the coil (2). The coils (2) and the manifold (3) are filled with heat transfer oil. The water pump (6) is frequency-controlled, and the power supply frequency of the frequency conversion is set to output a pulse frequency at a certain interval, and the high-frequency amplitude and low-frequency amplitude of the frequency conversion pulse frequency are the same; a pulse damper (8) and a temperature sensor (9) are installed on the water outlet pipe (7); The upper end of the spiral tube of the coil (2) is connected to the fixed end (10) and the movable end (11) on the inner side of the furnace (1); the fixed end (10) extends out of the outer side of the furnace (1) to connect to the manifold (3); the movable end (11) is the end of the coil (2) located there; the movable end (11) extends into the inner hole of the fixed end (10); the movable end (11) is connected to the fixed end (10) through a sealing ring clearance fit; A vibrating mechanism is arranged at the movable end (11) of the furnace (1), and the vibrating mechanism comprises a base (14) fixed inside the furnace (1). A horizontal arm (12) is welded to the movable end (11) of the coil (2), the other end of the horizontal arm (12) is a pressure head (21), the right side of the pressure head (21) is a slope surface E (24), the slope surface E (24) of the pressure head (21) is connected to the vertical arm (13) through a dovetail groove guide rail, the vertical arm (13) and the base (14) are connected in a guiding manner, the base (14) is also connected in a guiding manner to a vibrating rod (15), and the vibrating rod (15) is connected in a guiding manner to the vertical arm (13) and the base (14) is connected in a guiding manner to the vibrating rod (15). ) and a base (14), the upper part of the vibration rod (15) is pressed against the lower end of the horizontal arm (12), a locking block (17) is provided on the vibration rod (15), a sliding block (16) is provided on the vertical arm (13), a compression spring is provided between the sliding block (16) and the vertical arm (13), an unlocking tongue (18) is installed on the base (14), the upper part of the unlocking tongue (18) is a slope surface B (20), the lower part of the sliding block (16) is a slope surface A (19), the left side of the sliding block (16) is a slope surface C (22), and the lower part of the locking block (17) is a slope surface D (23).

2. The energy-saving and environmentally friendly boiler according to claim 1, characterized in that: The action mechanism of the vibration mechanism is as follows: when the coil (2) expands, the horizontal arm (12) moves horizontally to the right, the pressure head (21) drives the vertical arm (13) to descend through the dovetail groove guide rail, the slider (16) connected to the vertical arm (13) presses the lock block (17) to drive the vibration rod (15) to descend, when the slope surface A (19) on the vertical arm (13) touches the slope surface B (20) on the unlocking tongue (18), the slider (16) moves to the right, the vibration rod (15) is released, and the vibration rod (15) strikes the horizontal arm (12) under the action of the compression spring, when the coil (2) contracts, the horizontal arm (12) moves left, the vertical arm (13) rises, and the slope surface C (22) of the slider (16) passes over the slope surface D (23) of the lock block (17) and returns to the top of the lock block (17).

3. The energy-saving and environmentally friendly boiler according to claim 1 is characterized in that: Two Y-type filters (25) are connected in parallel to the water outlet pipe (7), and each Y-type filter (25) is provided with a ball valve at the front and rear ends.

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