KR100740828B1 - 4-port demper type control device for regenerative burner - Google Patents

Abstract

A 4-port damper type control device for regenerative burner is provided to easily control various variable passage and to prevent foreign substance from being accumulated in a switching valve body. A 4-port damper type control device for regenerative burner includes a body(110), an upper cover, a lower cover(130), a conduit(140), a partition, a fluid gate(160), a damper, and a damper driving unit(180). The body is made in the form of a cylindrical pipe and is coupled with the upper cover and the lower cover to form a sealed inner space. The upper cover and the lower cover are assembled to the body by bolts and nuts to be dissembled for repairing the control device. The conduit is welded to the outer circumference of the body in four positions to form a passage for fluid. The conduit includes a suctioning pipe(141) to suction combustion air from exterior, first and second burner connecting pipes(142,144) to selectively supply the suctioned combustion air to a first and second burners, and an exhaust pipe to discharge exhaust gas introduced into the connecting pipes to the exterior.

Description

Damper-type 4-way switching device for regenerative burner {4-Port Demper type Control Device for Regenerative Burner}

1 is a schematic diagram illustrating the principle of a typical regenerative burner system.

Figure 2 is a perspective view showing the configuration of the four-way switching device of the heat storage burner according to the present invention.

Figure 3 is an exploded perspective view showing the internal configuration of the four-way switching device of the heat storage burner according to the present invention.

Figure 4 is a schematic diagram showing a regenerative burner system to which the four-way switching device according to the present invention is applied.

5 to 8 are cross-sectional and longitudinal cross-sectional views showing the operating state of the switching device according to the present invention and the flow of fluid.

<Description of Symbols for Major Parts of Drawings>

101: first burner 102: heat storage body

103: second burner 104: heat storage body

110: switch body 111: hollow part

120: upper cover 130: lower cover

140: pipeline 141: intake pipe

142: first burner connector 143: exhaust pipe

144: second burner connector 150: partition wall

151,152,153,154: first, second, third, fourth separation wall

151a, 152a, 153a, 154a: guide groove

160: fluid gate

161,162,163,164: first, second, third, fourth gate

170: damper

171,172,173,174: first, second, third and fourth dampers

180: damper driver 181: damper case

183: hydraulic and pneumatic cylinder 185: cylinder shaft

The present invention relates to a four-way switching device of a regenerative burner, in particular to form a partition wall for partitioning the inside of the switch body into a plurality of hollows in order to easily control the variable flow path of various forms, the partition wall It relates to a four-way switching device of the heat storage burner to be opened and closed by the vertical movement of the damper individually operated by the hydraulic / pneumatic cylinder.

In general, combustors such as burners are used to inject fuel and air at an appropriate mixing ratio to combust them, and transfer the thermal energy generated by the combustion to other media to melt or change the temperature, and also convert them into electricity or kinetic energy. Used.

1 is a schematic view illustrating the principle of a general heat storage burner system. Referring to the general heat storage burner system as shown in the drawing, first and second burners 10 and 20 are installed in pairs, and First and second burners 10 and 20 are alternately operated, and when the first burner 10 is operated, the second burner 20 stops driving.

In this case, the combustion air sucked through the air inlet 31 for the operation of the first burner 10 is supplied to the first burner 10 through a variable flow path in the switch 30.

The combustion air is burned together with the feed fuel in the furnace to form a flame, thereby generating thermal energy for heating a heat exchanger such as a boiler.

Exhaust gas remaining after the heat exchange with the heat exchanger is supplied to the second burner 20 in a state where waste heat is contained, thereby performing secondary heat exchange while passing through the heat storage body 21.

At this time, the exhaust gas secondary heat exchanged with the heat storage body 21 is discharged to the exhaust port 33 through the variable flow path (exhaust flow path) of the switch 30.

Thereafter, when about 20 to 30 seconds have elapsed, the second burner 20 which has been stopped starts operation, and the operation of the first burner 10 is stopped.

At this time, the rotary damper 35 in the switch 30 is rotated so that the intake flow path and the exhaust flow path are reversed to each other.

As a result, the combustion air introduced through the suction port 31 is supplied to the second burner 20 to pass through the heat storage body 21. At this time, the heat storage body 21 is in a state where primary heat exchange is performed with the exhaust gas of the first burner 10 in the previous stage, and preheats the combustion air that flows.

As such, the preheated combustion air contributes to improving the combustion efficiency inside the furnace of the burner, which contributes to improving the heat exchange efficiency of the regenerative burner system.

Thereafter, the exhaust gas remaining after the heat exchange with the heat exchanger passes through the heat accumulator 11 of the first burner 10, and is secondarily heat exchanged, and then discharged to the exhaust port 33 through the exhaust flow path of the switch 30.

Thereafter, after a predetermined time (20 to 30 seconds) has elapsed, the operation of the second burner 20 is stopped and the operation of the first burner 10 is started. Similarly, the rotary damper of the switcher 30 35) is rotated so that the intake flow passage and the exhaust flow passage inside the switch 30 are reversed.

However, the prior art as described above has a problem that the packing for airtightness is easily worn by the frequent rotation operation of the rotary damper (35). When the packing is worn as such, a gap is generated between the switch 30 and the rotary damper 35, and combustion air and exhaust gas are mixed and sucked through the gap, thereby reducing the combustion efficiency.

In addition, the heat storage burner of the prior art as described above, when the power is cut off, when the operation of the rotary damper 35 is stopped and fixed at a certain position, as only a specific flow path in the switch 30 is continuously heated. There was a problem that the thermal strain on the heated portion is severely accumulated and thermal deformation and breakage occur.

In addition, the conventional technology has a problem that the operation method of the burner is not uniform, because the operation of the rotary damper 35 is made in a batch, and there is a problem that the foreign matter is continuously accumulated in the switch 30, the efficiency of the burner As it resisted the problem, it had to be cleaned periodically.

In addition, the conventional technology has a hassle to provide a separate intake / exhaust flow control valve in order to adjust the flow rate of the combustion air or the exhaust gas exhaust gas, which is complicated to install the piping equipment for installing the intake / exhaust flow control valve In addition to the problems, there was a problem of increasing construction cost due to the large amount of time required for the operation of the facility, and difficult operation / management of the intake / exhaust flow control valve.

An object of the present invention for solving the conventional problems is to form a partition wall for partitioning the inside of the switch body into a plurality of hollow parts, the partition wall is opened and closed by the vertical movement of the damper individually operated by the hydraulic / pneumatic cylinder By intermittent, it is easy to control various types of variable flow path, and each flow path is controlled individually, to provide a four-way switching device of the heat storage burner to prevent the accumulation of foreign matter in the heat storage body and the switching valve. have.

Another object of the present invention for solving the conventional problems is that when the switch is stopped by the power off in an emergency, all of the hydraulic / pneumatic cylinder that is responsible for the opening and closing operation of the damper is always in an open state (normally open) of the switching valve It is to provide a four-way switching device of the regenerative burner to temporarily release the function to prevent the switch from overheating breakage from the hot exhaust gas.

Further, another object of the present invention is to design the sliding contact surface of the damper driving unit and the damper driving unit to be inclined wedge shape so that good airtightness can be achieved for a long time without using a separate packing material. In providing a room changer.

In addition, another object of the present invention is to conveniently set the operating mode of the industrial furnace according to the seasonal or regional environmental changes by adjusting or individually adjusting the opening and closing amount of the damper without having to provide a separate intake / exhaust flow control valve To provide a four-way switching device for a regenerative burner.

Four-way switching device of the regenerative burner according to the present invention for achieving the above object is installed between the pair of burners alternately operated to switch the four-way of the regenerative burner to periodically switch the fluid flow of combustion air and exhaust gas As a device, a plurality of conduits are formed on the outer surface of the switch body for entering and exiting a fluid, and a plurality of inner spaces in which each conduit communicates one by one is partitioned by partition walls, and each partition wall is operated individually. The opening and closing control by the cylinder is characterized in that the flow of the fluid is periodically varied.

Four-way switching device of the heat storage burner according to an embodiment of the present invention for achieving the above object is a switch body through which the inside vertically penetrated; An upper cover and a lower cover respectively coupled to the upper and lower openings of the switch body to seal the inside thereof; A conduit configured to be joined at four outer surfaces of the switch body to form a moving passage of the fluid; A plurality of dividing walls installed perpendicular to the inside of the switch body to define four independent hollow portions corresponding to respective pipes, and to form a rectangular guide groove extending from the center of the upper surface to a lower portion; A fluid gate configured to cut a predetermined center of the front face of each of the dividing walls to allow the fluid to pass therethrough; A damper coupled to and separated from the guide groove of the dividing wall in a vertical direction to open and close the fluid gate; It characterized in that it comprises a damper drive unit installed on the upper cover to individually control the vertical opening and closing operation of the damper.

Hereinafter, with reference to the accompanying drawings for a preferred embodiment of the present invention will be described in detail.

Figure 2 is a perspective view showing the configuration of the four-way switching device of the heat storage burner according to the present invention, Figure 3 is an exploded perspective view showing the internal configuration of the four-way switching device of the heat storage burner according to the present invention.

The four-way switching device of the heat storage burner according to the present invention as shown in the drawing is largely the switch body 110, the upper cover 120, the lower cover 130, the conduit 140, the dividing wall 150, The fluid gate 160, the damper 170, and the damper driver 180 are configured to be included.

The switch body 110 is made of a cylindrical tube through which the inside is penetrated, and the upper and lower openings are combined into a disc shaped upper cover 120 and lower cover 130 to form an interior of a closed space. Done.

The upper cover 120 and the lower cover 130 are assembled to the switch body 110 by using bolts and nuts, respectively, in case of similar repairs, such as the inner repair of the switching device 100, the inner repair is dismantled. Make it possible.

In addition, the pipe line 140 is joined in four directions of the outer surface of the switch body 110 to form a moving passage of the fluid, each pipe 140 is an intake pipe 141 for sucking the combustion air from the outside ), First and second burner connecting pipes 142 and 144 for selectively supplying the suction combustion air to the first burner 101 or the second burner 103, and the first and second burners. The exhaust pipe 143 for guiding the exhaust gas introduced into the connection pipes 142 and 144 of any one of the connection pipes 142 and 144 to the outside is configured.

In this case, the first and second burner connecting pipes 142 and 144 are disposed on the left and right sides of the intake pipe 141, respectively, so that combustion air introduced through the intake pipe 141 is first and second. It can be selectively switched to any one side of the burner connecting pipes (142, 144).

Here, while the role of the intake pipe 141 and the exhaust pipe 143 to suck the combustion air or discharge the exhaust gas is constantly maintained, the first and second burner connection pipes 142 and 144 are The intake / exhaust flow passages are made of a structure that is often alternated.

In addition, the separation wall 150 may include a first separation wall 151, a second separation wall 152, and a third separation wall in the order in which the plurality of separation walls 150 are installed vertically in the switch body 110. 153, and the fourth separation wall 154.

At this time, the four separation walls 151, 152, 153 and 154 installed as described above partition four independent hollow portions 111 inside the switch body 110, and the independent hollow formed as described above. The parts 111 have a structure in communication with each of the intake pipe 141, the exhaust pipe 143, the first burner connecting pipe 142, and the second burner connecting pipe 144.

In addition, each of the separation walls 151, 152, 153, and 154 forms rectangular guide grooves 151a, 152a, 153a, and 154a on an upper surface thereof. 152a, 153a, and 154a are manufactured in the form of a light-lower narrower which extends a predetermined depth to the lower end of the separating wall 150 when viewed from the front.

In this case, each of the separation walls 151, 152, 153, and 154 forms a fluid gate 160 cut in a predetermined range at a front center thereof to allow fluids to move between the hollow portions 111. As shown in FIG. 3, the fluid gate 160 includes the first gate 161, the second gate 162, and the third gate in the order in which the separation walls 151, 152, 153, and 154 are installed. 163 and the fourth gate 164.

In this case, the fluid gate 160 may be manufactured in various shapes as well as a quadrangular shape or a circular shape, and each of the fluid gates 161, 162, 163, and 164 may be controlled by a plurality of dampers 170. do.

The plurality of dampers 170 are manufactured in the same shape, but are classified into a first damper 171, a second damper 172, a third damper 173, and a fourth damper 174 according to the installation order. .

The dampers 171, 172, 173 and 174 open and close the fluid gate 160 to switch the flow of the fluid or to control the flow rate. The wedge is thick at the top and thin at the bottom. It is preferable to be manufactured in shape.

When the dampers 171, 172, 173, and 174 are manufactured in the wedge shape, the dampers 171 and 151 inserted into the guide grooves 151a, 152a, 153a, and 154a of the upper and lower narrow shapes are formed. 172) As the down (173) and 174 are downward, the guide grooves 151a, 152a, 153a, 154a and the dampers 171, 172, 173, 174 are in close contact with each other. Is improved.

At this time, each of the dampers 171, 172, 173, 174 slides up and down in conjunction with a plurality of damper driving unit 180 formed on the upper side of the upper cover 120.

Each damper driving unit 180 is installed on the upper surface of the upper cover 120 to collectively or individually control the vertical opening and closing operation of the damper 170.

The damper driver 180 is installed on the upper surface of the upper cover 120, the damper case 181 for guiding the coupling and separation of the damper 170 is moved in the vertical direction, and the upper side of the damper case 181 One end is coupled to the hydraulic / pneumatic cylinder (183) and the hydraulic / pneumatic cylinder (183), the other end is coupled to the upper side of the damper (170) by the pressure of the fluid straight up and down the damper (170) It consists of a cylinder shaft 185 that is adapted to move.

The damper driving unit 180 may be automatically controlled by a separate control unit (not shown) for controlling the heat storage burner system.

Referring to the operation of the present invention having the above configuration as follows.

FIG. 4 is a schematic view showing a regenerative burner system to which a four-way switching device is applied according to the present invention. In the regenerative burner system of the present invention as shown in the drawing, the first burner 101 and the second burner 103 are predetermined. It is installed in a structure that operates alternately at time intervals.

In this case, a switching device 100 is installed between the first burner 101 and the second burner 103, and the switching device 100 is combustion air and exhaust gas supplied to each burner 101 and 103. By switching the fluid flow of the pair of burners (101, 103) to control the alternating operation.

5 to 8 are a cross-sectional view and a longitudinal cross-sectional view showing the operating state and the flow of the fluid of the switching device according to the invention.

Prior to describing the switching device 100 of the heat storage burner according to the present invention with reference to the drawings, a first burner 101 is operated and a second operation burner is stopped operation will be described first. .

First, the combustion air sucked through the intake pipe 141 of the switching device 100 is supplied to the first burner 101.

To this end, as shown in FIG. 5, a flow path for injecting combustion air introduced through the intake pipe 141 into the first burner 101 is formed.

The flow path is formed by passing through the hollow portions 111 on the left and right sides of the first separation wall 151, and the first damper 171 coupled in the guide groove 151a of the first separation wall 151. By moving in the vertical direction, the first gate 161 is opened to move the combustion air.

The first damper 171 is vertically moved by the damper driver 180 as shown in FIG. 6.

In this case, as the working fluid is supplied to the hydraulic / pneumatic cylinder 183 of the damper driver 180, the cylinder shaft 185 reciprocates forward and backward, and the first damper coupled to the front end of the cylinder shaft 185. 171 is interlocked to move up and down vertically.

The first damper 171 that is vertically moved upwardly in association with the cylinder shaft 185 is inserted into the damper case 181 to maintain the open state of the first gate 161 for a predetermined time.

At this time, when the first gate 161 is opened, the third gate 163 installed at the opposite position is opened together, and the operation of the third damper 173 to open the third gate 163 is performed. It is made in the same manner as the operation of the first damper 171.

Accordingly, as shown in FIG. 6, the symbols of the first separating wall 151, the guide groove 151a, the first gate 161, and the first damper 171 are described, and the third separating wall 153 is provided for convenience. Reference numerals of the guide grooves 153a, the third gate 163, and the third damper 173 are written together.

The second gate 162 and the fourth gate 164 are closed while the first gate 161 and the third gate 163 remain open by the operation of the damper driver 180 as described above. Is maintained so that two bisected flow paths (intake flow path and exhaust oil) are formed in the switch body 110.

As shown in FIG. 4, the combustion air supplied through the intake passage as described above is supplied to the first burner 101 to be burned together with the injected fuel to form a flame, thereby supplying heat energy to a heat exchanger such as a boiler.

Thereafter, the exhaust gas remaining after heat exchange with the heat exchanger is supplied back to the second burner 103.

At this time, the exhaust gas contains 70% or more of waste heat, and heats the heat storage body 104 by performing a second heat exchange while passing through the heat storage body 104 formed at the inlet of the second burner 103.

Exhaust gas devoted through heat exchange with the heat storage body 104 is recovered to the switching device 100 in a state in which a small amount of heat is contained and discharged to the outside through the exhaust pipe 143 through the exhaust flow path as shown in FIG. 5.

After the operation state of the first burner 101 is maintained for a predetermined time, when a predetermined time elapses, the operation of the first burner 101 is stopped and the second burner 103 is operated. At this time, the operating time of the first burner 101 is preferably maintained for about 20 to 30 seconds.

Hereinafter, the operation system of the second burner 103 will be described with reference to FIGS. 7 to 8.

First, as shown in FIG. 7, an intake passage is formed to allow combustion air introduced through the intake pipe 141 to flow into the second burner 103.

The intake flow passage is formed by passing through the hollow portions 111 on the left and right sides of the fourth separation wall 154, and the fourth damper 174 coupled to the guide groove 154a of the fourth separation wall 154. By moving in the vertical direction, the fourth gate 164 is opened to allow the combustion air to move.

The fourth damper 174 is vertically moved by the damper driver 180 as shown in FIG. 8.

In this case, as the working fluid is supplied to the hydraulic / pneumatic cylinder 183 of the damper driver 180, the cylinder shaft 185 reciprocates forward and backward, and the fourth damper coupled to the front end of the cylinder shaft 185. 174 is interlocked to move up and down vertically.

The fourth damper 174 that is vertically moved upwardly in association with the cylinder shaft 185 is inserted into the damper case 181 to maintain the open state of the fourth gate 164 for a predetermined time.

At this time, when the fourth gate 164 is opened, the second gate 162 installed at the opposite position is opened together, and the operation of the second damper 172 to open the second gate 162 is performed. The operation is the same as that of the fourth damper 174.

For this reason, as shown in FIG. 8, the signs of the fourth separation wall 154, the guide groove 154a, the fourth gate 164, and the fourth damper 174 are described together with the second separation wall 152. Reference numerals of the guide grooves 152a, the second gate 162, and the second damper 172 are written together.

The first gate 161 and the third gate 163 are in a closed state while the fourth gate 164 and the second gate 162 remain open by the operation of the damper driver 180 as described above. It is maintained so that two bisected flow paths (intake flow path and exhaust oil) are formed in the switch body 110.

Combustion air supplied through the intake passage as described above is supplied to the second burner 103 as shown in FIG.

At this time, the combustion air passes through the heat accumulator 104 installed at the inlet of the second burner 103. The heat accumulator 104 is already heated by the exhaust gas of the first burner 101 in the previous stage. As a result, the incoming combustion air is preheated to a high temperature.

As such, the preheated combustion air contributes to improving the combustion efficiency of the feed fuel in the furnace and improves the heat exchange efficiency with the heat exchanger.

Exhaust gas remaining after heat exchange with the heat exchanger is supplied back to the first burner 101, and the second heat exchange is performed while passing through the heat storage body 102.

Exhausted gas exhausted in the course of passing through the heat storage body 102 is recovered to the switching device 100 in a state in which a small amount of heat is contained and discharged to the exhaust pipe 143 through the exhaust flow path as shown in FIG. 7.

After the operation state of the second burner 103 is maintained for a predetermined time (20-30 seconds), the second burner 103 is alternately operated with the first burner 101.

The present invention having the configuration as described above forms a partition wall for partitioning the inside of the switch body into a plurality of hollow parts, by allowing the partition wall to be opened and closed by the vertical movement of the damper individually operated by the hydraulic / pneumatic cylinder By having the convenience of easily controlling various types of variable flow paths and allowing each flow path to be individually controlled, there is an effect of preventing foreign matter from accumulating in the heat storage body and the switching valve, thereby improving thermal efficiency.

In addition, in the present invention, when the switch is stopped due to power off in an emergency, all of the hydraulic / pneumatic cylinders in charge of the opening and closing operation of the damper are normally opened so that the function of the switching valve is temporarily released to exhaust the high temperature. There is an effect that it is possible to prevent the switch from overheating breakage from the gas.

In addition, the present invention has the effect that the damper and the damper and the sliding contact surface of the guide groove to be matched to the wedge shape to be inclined to form a good airtight for a long time without using a separate packing material.

In addition, the present invention is able to collectively adjust or individually adjust the opening and closing amount of the damper, there is an effect of improving the structure that does not have to provide a separate intake / exhaust flow control valve, the industrial furnace of the season or regional environmental changes There is an effect that can easily set or manage the operation mode.

Claims (8)

delete A switch body through which the inside penetrates; An upper cover and a lower cover respectively coupled to the upper and lower openings of the switch body to seal the inside thereof; A conduit configured to be joined at four outer surfaces of the switch body to form a moving passage of the fluid; A plurality of dividing walls installed perpendicular to the inside of the switch body to define four independent hollow portions corresponding to respective pipes, and to form a rectangular guide groove extending from the center of the upper surface to a lower portion; A fluid gate configured to cut a predetermined center of the front face of each of the dividing walls to allow the fluid to pass therethrough; A damper coupled to and separated from the guide groove of the dividing wall in a vertical direction to open and close the fluid gate; A damper driver installed on an upper surface of the upper cover to individually control the vertical opening and closing operation of the damper; Four-way switching device of the regenerative burner, characterized in that comprising a. The method of claim 2, The damper driving unit is installed on the upper surface of the upper cover damper case for guiding the coupling and separation of the damper to move in the vertical direction; A hydraulic / pneumatic cylinder installed above the damper case; A cylinder shaft having one end coupled to the hydraulic / pneumatic cylinder and the other end coupled to an upper side of the damper to vertically move the damper by the pressure of a fluid; Four-way switching device of the regenerative burner, characterized in that comprising a. The method of claim 2, The conduit includes an intake pipe for sucking combustion air from the outside, first and second burner connecting pipes for selectively supplying the suction combustion air to the first burner or the second burner, and the first and second burners. Four-way switching device of the heat storage burner, characterized in that consisting of an exhaust pipe for inducing the exhaust gas introduced into the connection pipe of any one of the connection pipe to the outside. The method of claim 4, wherein And the first and second burner connecting pipes are arranged at left and right sides of the intake pipe, respectively. The method of claim 2, The guide groove has a rectangular cross-sectional shape, the four-way switching device of the heat storage burner, characterized in that it consists of a light-receiving narrow (上 형 下 狹) shape that becomes narrower as a predetermined depth extends from the upper end of the separation wall to the lower end. The method of claim 2, The damper is a four-way switching device of the heat storage burner, characterized in that the upper end is made of a thick wedge-shaped plate body is inserted into the guide groove of the separation wall. The method of claim 2, The damper driving unit as described above is a four-way switching device of the heat storage burner, characterized in that the automatic control by a separate control unit for controlling the heat storage burner system.

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