KR100370338B1 - Steam Boiler System For Saving Energy - Google Patents

Abstract

Provides a system that can significantly reduce the fuel consumption of the steam boiler (Steam Boiler).

Such a system comprises a boiler for generating steam and steam pressure converting means for converting the high pressure steam from the steam boiler into low pressure steam lower than the pressure of the steam and pressurized high pressure steam higher than the steam pressure generated from the boiler; And a main header for receiving the low pressure steam and supplying it to the user, and heat exchange means for ejecting the pressurized high pressure steam into the saturated water of the boiler to conduct heat transfer to the saturated water.

Description

Steam Boiler System For Saving Energy

The present invention relates to an energy-saving steam boiler system, and more particularly, to a steam boiler system for performing saturation hydration heat exchange in a boiler with velocity energy generated when depressurizing high-pressure steam generated from a steam boiler.

Steam boilers are a system that generates energy to work by heating water to increase internal energy.

In general, a steam boiler has a structure in which water in a tank is heated, and the tank is heated to evaporate water in a saturated steam state. The saturated steam is a main header for distributing and supplying steam to each steam place through a pipeline. Have a flowing system.

In such a system, it is necessary to adjust the pressure of the saturated steam since the pressure of the saturated steam generated in the steam boiler is not a pressure suitable for the steam application.

Since the pressure control of the steam is to lower the pressure to be substantially uniform, a pressure reducing means is installed between the steam boiler and the main header.

The steam of the pressure lowered by this decompression means flows to the main header, and the velocity energy of the steam decreases when the pressure is lowered in this decompression means.

However, as described above, the high pressure steam generated from the steam boiler is lowered and supplied to each steam use place, but the low pressure of the high pressure steam in the decompression means is not related to energy loss.

In other words, reducing some of the steam generated by using the fuel in the boiler before using it in the boiler means that the efficiency of the energy used in the boiler is reduced.

The present invention has been invented from this point of view, and an object of the present invention is to increase the steam production rate in the steam boiler by using the velocity energy of the steam generated due to the pressure control of the steam carried out between the steam boiler and the main header. It is to provide an energy saving steam boiler system.

In order to realize the object of the present invention, a burner;

A steam boiler for converting the boiler water into saturated water and steam by the combustion heat of the burner;

A turbo injector for pressurizing the pressure steam with the velocity energy of the steam while lowering the pressure of the pressure steam generated from the steam boiler;

A main header which receives the low pressure steam lowered from the turbo injector and supplies the steam to a steam use place;

It provides an energy-saving steam boiler system including a heat exchange means for injecting the pressurized pressure steam from the turbo injector into the saturated water to perform heat exchange by increasing the convection of the saturated water to promote the generation of steam.

1 is a steam boiler system according to the present invention.

2 is a partially cutaway perspective view of a turbo injector according to the present invention;

3 is a side sectional view of a turbo injector according to the present invention;

Figure 4 is a side sectional view of a heat exchange means according to the present invention.

5 is a front view of a heat exchange means according to the present invention.

6 is a view partially showing another embodiment of a steam boiler system according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a steam boiler system according to the present invention, 2 denotes a steam boiler, and 4 denotes a main header.

The steam boiler 2 has a housing 6 and a flue 10 and a water tank 12 separated by partitions 8 arranged inside the housing.

A burner 14 is installed at the inlet side of the flue 10 to blow out flames in association to increase the temperature of water in the water tank 12 adjacent to the flue.

The portion where the saturated water to be heated is located is defined as the saturated water zone (A), and the portion where the vapor evaporated in the saturated water zone temporarily stays is defined as the steam zone (B).

It is preferable to manufacture the corrugated pipe to absorb the heat deformation until the flame of the burner 14 progresses in the pipe | tube 10, and the other part can use either a straight pipe or a curved pipe.

The steam section is connected to a first tube 16 through which high pressure steam flows, and the first tube 16 has a turbine 18 which is rotated by the high pressure steam flowing along the first tube and the same as the turbine. The compressor 20 is connected to the shaft is rotated in conjunction with the rotation of the turbine.

The inlet side of the compressor 20 is connected to the first pipe 16 and has a connection structure in which high pressure steam can be introduced, so that the turbine 18 starts to rotate by the high pressure steam, The steam pressure is lowered and the compressor 20 draws a high pressure steam to generate a higher pressure steam. Such means is defined in the present invention as a turbo injector.

In addition, the outlet side of the compressor communicates with the second pipe 22 to supply the humid steam boosted to a higher pressure into the water tank 12 of the steam boiler, and the outlet side of the turbine 18 receives steam having a lower pressure. In order to supply to the main header 4, it communicates with the 3rd pipe | tube 24. As shown in FIG.

A nozzle (N) for blowing steam is connected to the second pipe (22), and the nozzle is installed in a structure in which the water tank unit (12) is located.

2 and 3 are partial cutaway perspective and side cross-sectional views of a turbo injector comprising a turbine 18 and a compressor 20 in accordance with the present invention, wherein the turbine 18 flows into the first conduit 16 in the present invention; The compressor 20 serves to reduce the pressure of the high pressure, and the compressor 20 receives the velocity energy of the high pressure steam released when the turbine performs the pressure reduction to further compress the high pressure steam to increase the pressure of the steam. .

In the turbo injector as described above, a nozzle guide vane 28 is installed inside the turbine casing 26, and the stator guide vane 30 has a constant distance from the nozzle guide vane. The rotor blade 34 which is provided in the outer periphery of the turbine disk 32 is located between these vanes.

The turbine casing 26 has a volute passage in which the internal volume gradually decreases, which has a steam nozzle 36 for injecting high pressure steam into the vanes.

The stator guide vanes 30 and the turbine disk 32 are connected to a third pipe 24, which is a low pressure pipe, and are surrounded by a pipe member 38 for supplying low pressure to the pipe.

The turbine disk 32 is connected to the impeller 42 of the compressor 20 through the rotation shaft 40 has a structure capable of transmitting a rotational force.

The impeller 42 is surrounded by a compressor casing 44 having a vapor flow passage, and a diffusion diffuser vane 43 is installed between the passage and the impeller to convert kinetic energy into pressure energy. The rotary shaft 40 is surrounded by a bearing housing 46 which connects the turbine casing and the compressor casing.

The bearing housing 46 is provided with a ball bearing 48 for rotatably supporting the rotating shaft, and is provided with a thrust bearing 50 for preventing the rotating shaft from moving in the axial direction by thrust.

In addition, a mechanical seal 52 is installed on the turbine casing 26 and the compressor casing 44 so that heat of the high pressure steam does not deteriorate the functions of the bearings, thereby preventing high temperature and high pressure steam leakage. In addition, a passage 54 for supplying lubricating oil is provided for smooth operation of the bearing.

4 and 5 show heat exchange means according to the present invention. The heat exchange means supplies the high pressure steam to the water tank unit 12 through the second pipe 22 connected to the outlet side of the compressor 20 to increase the convection of water in the water tank unit. It is to promote heat exchange with the heat of combustion.

Such a means provided by the present embodiment includes a first nozzle 56 connected to the second pipe 22 by a flange joint and receiving pressurized steam, and having an inner diameter smaller than the first nozzle and having an inner side of the nozzle. And a second nozzle 58 which extends from it, and a vortex generating member 60 which surrounds these nozzles 56 and 58.

The pressurized steam introduced into the first nozzle at a distance apart from the first nozzle 56 and the second nozzle 58 is injected out of the second nozzle through the first nozzle and simultaneously sprayed through the second nozzle to form the vortex The flow inside the generating member 60 is made faster.

The vortex generating member 60 is formed in a substantially cylindrical shape, and a plurality of holes 62 through which water contained in the water tank 12 is allowed to flow into the inside of the member are drilled. When the flow is faster, the water in the tank is configured to be introduced into the vortex generating member through these holes.

As shown in Fig. 5, the second nozzle 58 has a flattened tip portion, and is configured to further speed up the injection speed of the steam to be injected. Of course, other structures may be provided to speed up the injection of steam.

Meanwhile, as shown in FIG. 1, stop valves 64 and 66 are installed at the inlet side of the turbine 18 and the inlet side of the compressor 20, respectively, to block or prevent the flow of steam flowing to the turbo injector. To keep it.

In addition, the third pipe 24 connected to the outlet side of the turbine 18 is provided with a three-way valve 68 of the general electrical control type when the third header when no further steam supply to the main header (4) When the pressure of the steam supplied to the main header 4 side is low, the steam of the first tube 16 is discharged to the third tube (3). The first pipe 16 and the three-way valve 68 are connected to the bypass pipe 70 so that it can be supplied to the bypass pipe 70. A pressure reducing valve 72 having a general structure is installed in the bypass pipe 70. .

Here, a stop valve 74 is provided in the pipe as a means for blocking the flow of steam when it is not necessary to supply steam to the bypass pipe 7.

In the figure, reference numeral 76 denotes a safety valve, 78 denotes a strainer, 80 denotes a pressure gauge, and 82 denotes stop valves for supplying or blocking steam to a steam destination.

In the energy-saving steam boiler system of the present invention, when the burner 14 first starts to heat the water in the water tank unit 12, the water in the water tank unit becomes saturated water, Pressure steam is collected.

At this time, when the main steam valve (M) is opened, the pressure steam flows along the first pipe (16) and flows into the turbine casing (26) of the turbine (18) and is injected through the steam nozzle (36).

At this time, the injected pressure steam, the pressure drops by the throttling action to maximize the flow rate and then decelerate. That is, the high-pressure steam accelerates at an extremely high speed, and starts to drive the blade while colliding the rotor blade 34 by the nozzle guide vanes 28.

When the rotor blade 34 absorbs energy from the high-speed steam and starts to rotate, the turbine disk 32 provided with the blade starts to rotate together and rotates the rotating shaft 40.

Therefore, the impeller 42 installed at one end of the rotary shaft 40 is rotated. At this time, the pressure of the pressure steam decreases primarily while passing through the steam nozzle 36 of the turbine, and then impinges on the rotor blade 34. While the pressure decreases in the second direction, the axial flow flows through the stator blades 30, and is stably supplied to the main header 4, and the pressure steam of the first pipe 16 is increased by the impeller 42 on the compressor side. As it flows into the central side of the impeller, it flows out of the centrifugal channel in the steam flow passage by centrifugal force.

In this steam flow passage, the pressure steam flowing out of the centrifuge is pressurized when passing through the diffuser vanes 43 with the speed of the flow being higher, and the vapor pressure of the steam is further increased to the heat exchange means through the second pipe 22. Supplied.

The pressurized steam supplied to the heat exchange means is supplied to the water tank unit 12 while flowing to the first nozzle 56 and also to the second nozzle 58 as shown by the arrow in FIG.

At this time, the inside of the vortex generating member (60) part is lowered due to the rapid flow of the pressurized steam, and the saturated water inside the tank part flows into the member through the holes (62) and flows together with the pressurized steam.

By this action, the saturated water contained in the water tank 12 undergoes rapid heat exchange with the pressurized high-temperature steam to substantially vaporize the saturated water inside the water tank.

That is, the pressurized steam is injected into the water tank unit 12 while vigorously stirring the saturated water, and convective motion is activated, and the self-released heat energy is converted into saturated water, so that the saturated water inside the water tank unit promotes evaporation. .

Fig. 6 shows another piping system of the present invention, which is a system in which the pressure on the third pipe 24 side, which is the low pressure side line, needs to be kept constant regardless of the fluctuation of the vapor pressure generated from the boiler body. It is suitable.

In the piping system of this embodiment, the pressure reducing valve 72 is installed in series at the outlet side of the turbine 18, and when the steam consumption of the steam destination is low, the pressure reducing valve 72 is closed so that the first pipe 16 is the high pressure side line. Compression of the compressor is stopped by allowing the steam flow to stop, and when the pressure of the low pressure side line decreases due to an increase in the steam consumption of the steam destination, the pressure reducing valve is opened to allow the compressor to work again. The three-way valve is not used in the piping system of this embodiment.

As described above, the energy-saving steam boiler system according to the present invention drives the turbine with the velocity energy generated when the pressure steam generated in the boiler is decompressed to a suitable pressure at the place of use, and the pressure steam is connected to the compressor. By further pressurizing and spraying again into saturated water contained in the water tank inside the boiler to increase the convection of the saturated water to facilitate the heat transfer through the heat transfer surface with the heat of combustion to promote the generation of steam.

As a result, such a system can significantly reduce the amount of fuel energy used in the boiler compared to the conventional system, thereby achieving energy savings.

In particular, by using the velocity energy emitted when the pressure of the steam generated in the boiler is lowered without using external energy, a larger amount of steam can be generated under the same conditions as in the prior art, thereby saving energy.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea of the present invention, and therefore, all of the objects including the object of the present invention and the claims of the present invention belong to the present invention. .

Claims (10)

(Correction) burner; A steam boiler for converting the boiler water into saturated water and steam by the combustion heat of the burner; A turbo injector for pressurizing the pressure steam with the velocity energy of the steam while lowering the pressure of the pressure steam generated from the steam boiler; A main header which receives the low pressure steam lowered from the turbo injector and supplies the steam to a steam use place; And a heat exchange means for injecting pressurized pressure steam from the turbo injector into the saturated water to exchange heat with the saturated water to promote steam generation, and the heat exchange means gradually increases the pressure steam pressurized from the turbo injector. An energy-saving steam boiler system comprising first and second nozzles spraying at a speed and a vortex generating member positioned in a state surrounding the first nozzle and the second nozzle. The energy-saving steam boiler system according to claim 1, wherein the turbo injector includes a turbine that receives high pressure steam and rotates the steam boiler, and a compressor that receives the rotational force of the turbine and further pressurizes the high pressure steam. delete (Correction) The energy saving type according to claim 1, wherein the vortex generating member has holes for saturating water in the water tank part to induce the saturation water into the inside of the member by the flow of subscribed steam injected from the first and second nozzles. Steam boiler system. The energy saving steam boiler system according to claim 1, wherein a three-way valve is provided between the turbo injector and the main header to control the flow of lowered pressure steam. The energy saving steam boiler system according to claim 1, wherein the steam boiler has a corrugated connection. The energy-saving steam boiler system according to claim 1, wherein a pressure reducing valve is connected in series between the turbo injector and the main header to control the driving of the turbo injector according to the pressure of the low pressure side line. The energy saving steam boiler system of claim 1, wherein the turbine of the turbo injector has stator guide vanes for converting the stream of reduced pressure into axial flow. The energy saving steam boiler system according to claim 4, wherein the second nozzle has a narrowed tip opening portion. (Correct) The energy saving steam boiler system according to claim 4, wherein the second nozzle extends from the inside of the first nozzle.