Energy-saving, water scale and explosion-proof steam heat energy machine

Abstract

The energy-saving, waterproof, scale-proof and explosion-proof steam heat energy machine comprises a furnace chamber, a water storage chamber outside the furnace chamber, a steam outlet arranged at the upper end of the water storage chamber, a water inlet arranged at the bottom of the water storage chamber, a front smoke chamber arranged at the front part, and a rear smoke chamber arranged at the rear part; a burner passes through the front smoke chamber and is communicated with the furnace chamber; a plurality of return flue pipes are embedded in the water storage chamber between the rear smoke chamber and the front smoke chamber and are communicated with the front smoke chamber and the rear smoke chamber respectively; a baffle is arranged at the position corresponding to the bottom of the furnace chamber at the rear part of the water storage chamber, the baffle divides the rear smoke chamber into an upper smoke box and a lower smoke box, the return flue pipe corresponding to the upper smoke box is a second return flue pipe, the second return flue pipe is communicated with the front smoke chamber and the upper smoke box respectively, the upper smoke box is communicated with the furnace chamber, the return flue pipe corresponding to the lower smoke box is a third return flue pipe, the third return flue pipe is communicated with the front smoke chamber and the lower smoke box respectively, and an energy saver is arranged at the rear part of the upper smoke chamber. Compared with the conventional three-return boiler, the steam temperature of the boiler is low, and the boiler efficiency is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of boilers, specifically relating to an energy-saving, scale-resistant, and explosion-proof steam thermal energy machine. Background Technology

[0002] Three-pass boilers are familiar to us. Their design maximizes the residence time of flue gas in the boiler and minimizes the flue gas outlet temperature, thereby maximizing the utilization of thermal energy and improving the boiler's thermal efficiency. This is a major breakthrough, enabling the fuel to burn as cleanly as possible and maximizing the utilization of heat.

[0003] In a three-pass boiler, the water storage chamber is usually located at the top of the furnace. After the flue gas from the furnace enters the flue gas chamber, it enters the flue gas pipe at the top of the water storage chamber and is discharged from the chimney. A large amount of scale easily accumulates on the outer wall of the flue gas pipe. The whole process, from room temperature water to steam generation to steam production, takes more than 40 minutes, and the exhaust gas temperature is about 280℃. The exhaust gas temperature is relatively high, resulting in low boiler efficiency. Summary of the Invention

[0004] The technical problem to be solved by this invention is to remove scale from pipes, reduce flue gas temperature, improve boiler efficiency, and achieve energy saving. To solve the above problems, this invention provides an energy-saving, scale-resistant, and explosion-proof steam thermal energy machine.

[0005] The object of this invention is achieved in the following manner:

[0006] An energy-saving, scale-resistant, and explosion-proof steam generator includes a furnace, an outer casing of which is fitted with a water storage chamber. The upper end of the water storage chamber has a steam outlet, and the bottom of the water storage chamber has a water inlet. A front smoke chamber is located at the front of the water storage chamber, and a rear smoke chamber is located at the rear of the water storage chamber. A burner passes through the front smoke chamber and communicates with the furnace. Several return smoke pipes are embedded in the water storage chamber between the front and rear smoke chambers, and these return smoke pipes communicate with both the front and rear smoke chambers. The rear of the water storage chamber connects to the bottom of the furnace. A baffle is installed at the corresponding position of the rear smoke chamber, which divides the rear smoke chamber into an upper smoke box and a lower smoke box. The return smoke pipe corresponding to the upper smoke box is the second return smoke pipe, which is connected to both the front smoke chamber and the upper smoke box. The upper smoke box is connected to the furnace. The return smoke pipe corresponding to the lower smoke box is the third return smoke pipe, which is connected to both the front smoke chamber and the lower smoke box. An energy-saving device is also installed at the rear of the upper smoke box. The lower part of the energy-saving device is connected to the lower smoke box, and the upper part of the energy-saving device is connected to the chimney.

[0007] The energy-saving, scale-resistant, and explosion-proof steam heat generator has a drain outlet at the lower end of the water storage chamber, a water inlet connected to a water inlet pipe, a water inlet pipe connected to a water pump, and a valve installed on the water inlet pipe; the lower end of the water storage chamber also has a drain outlet.

[0008] The energy-saving, scale-resistant, and explosion-proof steam generator has a water level gauge installed in the water storage chamber to measure the water level inside.

[0009] In the aforementioned energy-saving, scale-resistant, and explosion-proof steam thermal energy machine, the water storage chamber has a circular or rectangular cross-section.

[0010] In the aforementioned energy-saving, scale-resistant, and explosion-proof steam thermal generator, the position of the water inlet is staggered from the position of the return flue pipe.

[0011] The aforementioned energy-saving, scale-resistant, and explosion-proof steam heat generator has a guide plate installed at the bottom of the water storage chamber corresponding to the water inlet. The guide plate has several guide holes, the direction of which is parallel to the direction of the return flue pipe, or the direction of which is inclined towards the bottom wall of the water storage chamber.

[0012] The energy-saving, scale-resistant, and explosion-proof steam thermal energy machine includes a main body comprising an upper tube sheet and a lower tube sheet, with a side plate connecting the upper and lower tube sheets to form a sealed rear water chamber. The upper tube sheet, side plate, and lower tube sheet are an integral structure. A water inlet is provided on the side plate, connected to a water inlet pipe with a water inlet valve. A drain outlet is provided at the bottom of the side plate, connected to a drain pipe with a drain valve. The height of the water inlet is greater than or equal to the height of the drain outlet. A cavity is connected to the upper end of the upper tube sheet, which is connected to a chimney. A fourth-pass flue gas pipe is provided in the water inlet chamber, with one end connected to the lower smoke box and the other end connected to the cavity, which is connected to the chimney. The lower smoke box, energy-saving device, cavity, and chimney are connected through the fourth-pass flue gas pipe.

[0013] The energy-saving, scale-resistant, and explosion-proof steam thermal energy machine has a cavity with a trapezoidal or triangular cross-section.

[0014] Compared with the prior art, the present invention sets up return flue gas pipes in the water storage chambers above and below the furnace. The return flue gas pipes connect the upper smoke box to the front smoke chamber, the front smoke chamber to the lower smoke box, and the lower smoke box to the energy saver, thereby reducing the temperature of the discharged flue gas and achieving the effect of energy saving. The scale generated in the high-temperature water zone in the upper part of the furnace flows to the low-temperature water zone in the lower part of the furnace and is discharged through the drain port, thereby achieving the effect of removing scale.

[0015] In addition, by setting up or installing baffles and guide holes at the inlet, the room temperature water entering the water storage chamber is prevented from being sprayed directly onto the high temperature return flue, thus avoiding the risk of return flue explosion.

[0016] According to the test, compared with the conventional three-pass boiler, this application requires 15-18 minutes from room temperature water to steam generation and production, and the flue gas temperature discharged from the chimney is about 130℃, which is relatively low, and the boiler efficiency is greatly improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a cross-sectional view of the energy-saving device.

[0019] Figure 3 This is a schematic diagram of the cavity structure.

[0020] Figure 4 This is a vertical cross-sectional view of the energy-saving device.

[0021] Figure 5 This is a cross-sectional view of the water storage chamber.

[0022] Figure 6 This is the second cross-sectional view of the water storage chamber.

[0023] Figure 7 This diagram shows the connection relationship between the water inlet, the guide plate, and the wall of the water storage chamber.

[0024] Figure 8 This diagram shows the second type of connection between the water inlet, the guide plate, and the wall of the water storage chamber. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this invention.

[0026] like Figure 1-4As shown, this invention is an energy-saving, scale-resistant, and explosion-proof steam generator, including a furnace 1, a water storage chamber 6 surrounding the furnace, a steam outlet 11 at the upper end of the water storage chamber 6, a water inlet 17 at the bottom of the water storage chamber 6, a front smoke chamber 4 at the front of the water storage chamber, and a rear smoke chamber at the rear of the water storage chamber. A burner 12 passes through the front smoke chamber and communicates with the furnace. A plurality of return smoke pipes 5 are embedded in the water storage chamber between the rear smoke chamber and the front smoke chamber, and the return smoke pipes communicate with the front smoke chamber and the rear smoke chamber respectively. The return smoke pipes are located at the rear of the water storage chamber. A baffle is installed at the position corresponding to the bottom of the furnace, which divides the rear smoke chamber into an upper smoke box 2 and a lower smoke box 3. The return smoke pipe corresponding to the upper smoke box is the second return smoke pipe 51, which is connected to the front smoke chamber and the upper smoke box. The upper smoke box is connected to the furnace. The return smoke pipe corresponding to the lower smoke box is the third return smoke pipe 52, which is connected to the front smoke chamber and the lower smoke box. An energy-saving device 7 is also installed at the rear of the upper smoke box. The lower part of the energy-saving device 7 is connected to the lower smoke box, and the upper part of the energy-saving device is connected to the chimney 76.

[0027] A drain outlet 13 is provided at the lower end of the water storage chamber 6, and the water inlet is connected to the water inlet pipe 8. The water inlet pipe 8 is connected to the water supply pump, and a valve 9 is provided on the water inlet pipe 8. A drain outlet 13 is also provided at the lower end of the water storage chamber 6.

[0028] A water level gauge is installed in the water storage chamber 6 to measure the water level inside the water storage chamber 6.

[0029] The cross-section of the water storage chamber of this invention can be circular or rectangular, such as... Figure 5 and Figure 6 As shown.

[0030] If the inlet water temperature is low while the return flue pipe temperature is high, the cold water entering the storage chamber from the inlet will spray directly onto the third return flue pipe. Due to the large temperature difference between the inside and outside of the third return flue pipe, a large amount of steam can easily be generated instantaneously, potentially causing an explosion. To prevent the cold water entering the storage chamber from spraying directly onto the hot third return flue pipe, this invention improves the inlet position by staggering the inlet position from the return flue pipe position. Figure 5 and Figure 6 As shown, this prevents water from spraying directly onto the third pass flue, thus avoiding the risk of the third pass flue exploding.

[0031] To prevent cold water entering the water storage chamber from spraying directly onto the hot third-pass flue, another improvement of this invention is to install a guide plate 15 at the bottom of the water storage chamber corresponding to the water inlet. The guide plate has several guide holes 14, the direction of which is parallel to the direction of the return flue, or the direction of which is inclined towards the bottom wall of the water storage chamber. Figure 7 and Figure 8As shown, the cold water entering the water storage chamber from the inlet is dispersed parallel to or towards the inner wall of the bottom of the water storage chamber through the guide holes, thus avoiding the risk of explosion of the third pass flue. The guide plate is a hemispherical guide plate installed at the bottom of the water storage chamber; or the guide plate is a semi-circular arc installed at the bottom of the water storage chamber, wherein the radius of the semi-circular arc guide plate is parallel to the third pass flue, and the long axis is perpendicular to the third pass flue.

[0032] The specific structure of the energy-saving device of the present invention is as follows: Figure 2-4 As shown, the energy-saving device 7 includes a main body, which comprises an upper tube plate 71 and a lower tube plate 73. A side plate 70 connects the upper tube plate 71 and the lower tube plate 73, thereby enclosing the main body into a sealed rear water chamber 74. The upper tube plate 71, the side plate 70, and the lower tube plate 73 are an integral structure. A water inlet is provided on the side plate 70, which is connected to a water inlet pipe. A water inlet valve is provided on the water inlet pipe. Similarly, a drain outlet is provided at the lower part of the side plate 70, which is connected to a drain pipe. A drain valve is also provided on the drain pipe. The height of the water inlet is greater than or equal to the height of the drain outlet to facilitate the discharge of water from the rear water chamber 74. The water coming out of the drain outlet can be collected and used for the water pump in the water storage chamber.

[0033] The upper end of the upper tube sheet 71 is connected to a cavity 75, which is connected to the chimney 76.

[0034] A fourth-pass flue gas pipe 72 is installed inside the water inlet chamber 74. One end of the fourth-pass flue gas pipe 72 is connected to the lower smoke box 3, and the other end of the fourth circular flue gas pipe 72 is connected to the cavity 75. The cavity 75 is connected to the chimney 76. The lower smoke box 3 is connected to the energy-saving device 7, the cavity 75, and the chimney 76 through the fourth-pass flue gas pipe 72.

[0035] The cross-section of the cavity 75 can be trapezoidal or triangular, which saves material compared to a straight tube.

[0036] The working process of this invention is as follows:

[0037] Open valve 9 on the inlet pipe 8 and inlet valve B on the inlet pipe of the energy saver 7, turn on the water pump, fill the water storage chamber 6 and the inlet chamber 74 with room temperature water, and then close valve 9 and inlet valve.

[0038] Natural gas is introduced into burner 12 for combustion, and the combustion flame, flue gas, and heat first enter the furnace 1;

[0039] The flue gas and heat then enter the upper smoke box 2 through the rear end of the furnace 1. The flue gas and heat then enter the second pass flue gas pipe 51, which rapidly heats the water in the upper part of the water storage chamber 6 outside the second pass flue gas pipe 51. At the same time, the flue gas and heat in the second pass flue gas pipe 51 enter the front smoke chamber 4, and the hot steam of the high-temperature water in the upper part of the water storage chamber 6 is discharged from the steam outlet 11.

[0040] Due to the principle of heat exchange, the temperature of the flue gas entering the front smoke chamber 4 is reduced, and the heat is also reduced.

[0041] The cooled flue gas and reduced heat enter the third pass flue gas pipe 52 in the lower part of the water storage chamber 6 from the lower part of the front smoke chamber 4. The heat in the third pass flue gas pipe 52 heats the water outside the third pass flue gas pipe 52. At the same time, the flue gas and heat in the third pass flue gas pipe 52 enter the lower smoke box 3. Due to the principle of heat exchange, the temperature of the flue gas entering the lower smoke box 3 is further reduced, and the heat is further reduced.

[0042] The flue gas and heat in the lower smoke box 3 enter the fourth pass flue gas pipe 72, then enter the cavity 75, and are discharged from the chimney 76. Due to the principle of heat exchange, the heat in the fourth pass flue gas pipe 72 heats the room temperature water in the water inlet chamber 74 of the energy saver 7, which lowers the temperature of the flue gas entering the cavity 75, thus lowering the temperature of the discharged flue gas and achieving the effect of energy saving.

[0043] Because the flue gas temperature entering the third pass flue gas pipe 52 is lower than that entering the second pass flue gas pipe 51, and the heat entering the third pass flue gas pipe 52 is lower than that entering the second pass flue gas pipe 51, the temperature of the heated water in the upper part of the water storage chamber 6 is lower than that in the lower part. The scale generated in the high-temperature water zone in the upper part of the water storage chamber 6 falls into the low-temperature water zone in the lower part of the water storage chamber 6. Opening the valve on the drain pipe allows the scale, along with the water, to flow from the drain outlet 13 through the drain pipe and finally be discharged, thus achieving the effect of descaling. This invention has a simple structure, and no scale layer forms on the outside of the return flue gas pipe. The scale falls from the high-temperature water zone into the low-temperature water zone and is finally discharged from the drain outlet, thus both removing scale and achieving energy saving.

[0044] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention. These changes should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. An energy-saving, scale-resistant, and explosion-proof steam generator, comprising a furnace (1), a water storage chamber (6) provided on the outer casing of the furnace, a steam outlet (11) provided at the upper end of the water storage chamber (6), a water inlet (17) provided at the bottom of the water storage chamber (6), a front smoke chamber (4) provided at the front of the water storage chamber, a rear smoke chamber provided at the rear of the water storage chamber, and a burner (12) passing through the front smoke chamber and communicating with the furnace, characterized in that: Several return smoke pipes (5) are embedded in the water storage chamber between the rear smoke chamber and the front smoke chamber. The return smoke pipes are connected to the front smoke chamber and the rear smoke chamber respectively. A baffle is set at the rear of the water storage chamber corresponding to the bottom of the furnace. The baffle divides the rear smoke chamber into an upper smoke box (2) and a lower smoke box (3). The return smoke pipe corresponding to the upper smoke box is the second return smoke pipe (51). The second return smoke pipe is connected to the front smoke chamber and the upper smoke box respectively. The upper smoke box is connected to the furnace. The return smoke pipe corresponding to the lower smoke box is the third return smoke pipe (52). The third return smoke pipe is connected to the front smoke chamber and the lower smoke box respectively. An energy-saving device (7) is also provided at the rear of the upper smoke box. The lower part of the energy-saving device (7) is connected to the lower smoke box, and the upper part of the energy-saving device is connected to the chimney (76). The energy-saving device (7) includes a body, which includes an upper tube plate (71) and a lower tube plate (73). A side plate (70) is connected between the upper tube plate (71) and the lower tube plate (73), thereby enclosing the body into a sealed rear water chamber (74). The upper tube plate (71), the side plate (70), and the lower tube plate (73) are an integral structure. A water inlet for water inlet is provided on the side plate (70), and the water inlet is connected to... The water inlet pipe is equipped with a water inlet valve. The lower part of the side plate (70) is equipped with a drain outlet for drainage. The drain outlet is connected to the drain pipe. The drain pipe is also equipped with a drain valve. The height of the water inlet is greater than or equal to the height of the drain outlet to facilitate the discharge of water from the rear water chamber (74). The water coming out of the drain outlet is collected for the water pump inlet of the water storage chamber. The upper end of the upper pipe plate (71) is connected to a cavity (75), which is connected to the chimney (76). The rear water chamber (74) is equipped with a fourth pass flue gas pipe (72). (72) One end is connected to the lower smoke box (3), and the other end of the fourth return flue gas pipe (72) is connected to the cavity (75), and the cavity (75) is connected to the chimney (76); the lower smoke box (3) is connected to the energy saver (7), the cavity (75), and the chimney (76) through the fourth return flue gas pipe (72); a guide plate (15) is set at the bottom of the water storage chamber corresponding to the water inlet, and several guide holes (14) are set on the guide plate. The direction of the guide holes is parallel to the direction of the return flue pipe, or the direction of the guide holes is inclined towards the bottom wall of the water storage chamber.

2. The energy-saving, scale-resistant, and explosion-proof steam thermal energy machine according to claim 1, characterized in that: A drain outlet (13) is provided at the lower end of the water storage chamber (6), the inlet is connected to the water inlet pipe (8), the water inlet pipe (8) is connected to the water supply pump, and a valve (9) is provided on the water inlet pipe (8).

3. The energy-saving, scale-resistant, and explosion-proof steam thermal energy machine according to claim 1, characterized in that: A water level gauge is installed in the water storage chamber (6) to measure the water level in the water storage chamber (6).

4. The energy-saving, scale-resistant, and explosion-proof steam thermal energy machine according to claim 1, characterized in that: The water storage chamber has a circular or rectangular cross-section.

5. The energy-saving, scale-resistant, and explosion-proof steam thermal energy machine according to claim 1, characterized in that: The position of the water inlet is staggered from the position of the return flue.

6. The energy-saving, scale-resistant, and explosion-proof steam thermal energy machine according to claim 1, characterized in that: The cross-section of the cavity (75) is trapezoidal or triangular.

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