CN206695096U - a steam boiler - Google Patents

Abstract

The utility model provides a steam boiler, which belongs to the technical field of boiler manufacturing. It solves the problems of low heat conversion rate of existing steam boilers and the like. The steam boiler includes a shell with a furnace inside. The furnace is fixedly connected with a partition wall that divides the furnace into a combustion chamber and a flue gas chamber. A smoke hole is opened on the partition wall. There is a water storage tank and a steam tank. The water inlet pipe is connected with multiple water inlet branch pipes. There are multiple heat exchange pipes in the water storage tank. One end of the water storage tank is fixedly connected to the rear smoke box, and the other end of the water storage tank The front smoke box is fixedly connected, and the front smoke box or the rear smoke box is equipped with a smoke exhaust structure that allows the smoke to enter the heat exchange pipe and discharge the smoke. The water pipe is connected with a plurality of water inlet branch pipes which are located in the combustion chamber and communicate with the steam box, and the top of the steam box is connected with a steam pipe. The utility model has the advantages of high heat conversion efficiency, fast SAIC speed and the like.

Description

a steam boiler

technical field

The utility model belongs to the technical field of boiler manufacturing and relates to a boiler, in particular to a steam boiler.

Background technique

Biomass briquette fuel is a low-carbon and environmentally friendly clean energy, which can achieve zero emission of carbon dioxide during combustion, and the sulfur content is only about 20% of coal. Its nutrient content is high, it is easy to ignite, its combustion rate is higher than that of coal, its production cost is low, and its resources are widely distributed. Therefore, people make improvements to steam generators so that they can use biomass pellet fuel.

For example, Chinese patent documents disclose a steam boiler [application number: 201420108051.1; authorized announcement number: CN203731372U], which includes a boiler body with a feed port on the side, and a fire grate located below the feed port at the bottom of the boiler body The boiler body is equipped with a smoke outlet on the side of the feed port, the top of the boiler body is fixed with a water storage tank, the top of the water storage tank has a steam outlet valve, and the boiler body is equipped with a plurality of pipes that flow into the water storage tank. The heat exchange pipe for transporting water, the water storage tank is pierced with a plurality of horizontal heat exchange pipes arranged horizontally, and the boiler body is fixedly connected with the front smoke that connects all the ends of one side of the horizontal heat exchange pipe and the smoke outlet mask together. The boiler body is also fixedly connected with a rear smoke box which covers all the ends of the other side of the transverse heat exchange tube together and has a smoke outlet.

The above-mentioned steam boiler has a high utilization rate of high-temperature flue gas, but its heat exchange rate is still low, and the steam volume is relatively slow.

Contents of the invention

The purpose of the utility model is to provide a steam boiler with high heat exchanging efficiency and fast steaming speed aiming at the above-mentioned problems existing in the prior art.

The purpose of the utility model can be achieved through the following technical solutions: a steam boiler, including a shell with a feed port, the shell is provided with a hearth made of refractory bricks, it is characterized in that, in the hearth There is a partition wall that divides the furnace into a combustion chamber and a flue gas chamber, the combustion chamber communicates with the feed port, the partition wall is provided with a smoke hole, and the shell is pierced with a The water inlet pipe in the flue gas chamber, the housing is provided with a water storage tank at the top of the flue gas chamber and a steam box at the top of the combustion chamber, and the water inlet pipe is connected to multiple pipes located in the flue gas chamber and connected to the storage tank. The water inlet branch pipe connected to the water tank, the water storage tank is pierced with a plurality of heat exchange tubes, and one end of the water storage tank is fixedly connected with the rear smoke box that covers all the ends of the heat exchange tube side, the storage tank The other end of the water tank is fixedly connected with a front smoke box that covers all the ends of the other side of the heat exchange tube. The front smoke box or the rear smoke box is equipped with a device that allows the smoke to enter the heat exchange tube and can discharge the smoke. The smoke exhaust structure, the water storage tank is connected with a water inlet pipe extending into the combustion chamber, and the water inlet pipe is connected with a plurality of water inlet branch pipes located in the combustion chamber and connected with the steam box, so A steam pipe is connected to the top of the steam box.

When the steam boiler is in use, water enters from the water inlet pipe, fuel burns in the combustion chamber of the furnace, and high-temperature flue gas generated in the combustion chamber enters the flue gas chamber through the smoke hole, and the water inlet pipe and water inlet branch pipe in the flue gas chamber The heated water enters the water storage tank, the high-temperature flue gas enters the heat exchange pipe through the exhaust structure, and performs heat exchange on the water in the water storage tank again, and then the high-temperature flue gas is discharged from the exhaust structure. The heated water in the water storage tank flows from the water inlet pipe to the water inlet branch pipe, and the flame and high-temperature flue gas in the combustion chamber perform heat exchange on the water in the water inlet branch pipe. At this time, the water in the water inlet branch pipe The high-temperature water is vaporized to form steam entering the steam box, and the steam is discharged from the steam pipe. The above process has a high utilization rate of high-temperature flue gas and high heat exchange efficiency. Heat exchange, forming steam at a fast speed.

In the aforementioned steam boiler, the water inlet branch pipe includes a plurality of vertical pipes arranged vertically and at intervals in the combustion chamber, and the bottom ends of the vertical pipes are all connected to the water inlet pipe, The top end of the vertical pipe is connected with a horizontal pipe arranged horizontally and located at the top of the combustion chamber, and the horizontal pipe is connected with several steam outlet pipes communicating with the steam box. This structural layout is reasonable, the combustion chamber has a high degree of heat exchange with the vertical pipe, the horizontal pipe plays a role of buffering and collecting water, the heat exchange between the horizontal pipe and the combustion chamber is sufficient, and the steam formed in it enters the steam box from the steam outlet pipe.

In the above-mentioned steam boiler, the smoke passage hole is arranged close to the side wall of the furnace away from the feed inlet, and the smoke exhaust structure includes a smoke inlet connected to the smoke chamber at the bottom of the front smoke box, The middle part of the front smoke box is fixedly connected with a horizontal partition that divides the front smoke box into a lower chamber and an upper chamber, and the front smoke box is connected with a smoke outlet door located at the upper chamber.

The high-temperature flue gas passes through the entire combustion chamber, then enters the flue gas chamber from the smoke passage hole, passes through the entire flue gas chamber, and then enters the lower chamber from the smoke inlet, then the high-temperature flue gas enters part of the heat exchange tube to pass to the rear smoke box, and then The high-temperature flue gas enters the other part of the heat exchange and passes to the upper chamber, and then is discharged from the smoke outlet, so that the high-temperature flue gas stays in the combustion chamber, the flue gas chamber and the heat exchange tube for a long time, the heat exchange is sufficient, and the heat of the high-temperature flue gas is utilized. High rate.

In the aforementioned steam boiler, an induced draft fan is connected to the top of the front smoke box. This makes the smoke flow smooth.

In the aforementioned steam boiler, the furnace is connected with a soot removal door communicating with the combustion chamber, the furnace is also connected with a dust removal door connected with the flue gas chamber, and the rear smoke box is connected with a removal door. The ash door, the ash removal door and the ash removal door are all located on the side wall of the furnace away from the feed inlet. This makes cleaning up the ashes quick and easy.

In the aforementioned steam boiler, a safety valve and a pressure gauge are connected to the top of the steam box. In this way, it is convenient to observe the pressure in the steam box, and the safety valve ensures the safe use of the steam box.

Compared with the prior art, the structure of the steam boiler is reasonable, the utilization rate of high-temperature flue gas is high, the heat exchange efficiency is high, the steam speed is fast, and the cleaning is convenient and safe to use.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of the steam boiler.

Fig. 2 is a structural schematic diagram of the steam boiler without the casing and part of the furnace.

Fig. 3 is a schematic view of the structure of the steam boiler at another angle without the shell and part of the furnace.

Fig. 4 is a schematic diagram of the rear view of the steam boiler without the casing and part of the furnace.

In the figure, 1, shell; 1a, feed inlet; 2, furnace; 2a, combustion chamber; 2b, flue gas chamber; 3, partition wall; 3a, smoke hole; 4, water inlet pipe; 5, water storage tank ;6, steam box; 7, water inlet branch pipe; 8, heat exchange pipe; 9, rear smoke box; 10, front smoke box; 10a, smoke inlet; 10b, lower chamber; 10c, upper chamber; 11, water inlet Branch pipe; 12, water inlet branch pipe; 12a, vertical pipe; 12b, horizontal pipe; 12c, steam outlet pipe; 13, steam pipe; 14, partition; 15, smoke door; 16, induced draft fan; 17, digging Ash door; 18. Ash removal door; 19. Ash removal door; 20. Safety valve; 21. Pressure gauge.

detailed description

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the steam boiler includes a shell 1 with a feed inlet 1a, and a furnace 2 made of refractory bricks is arranged in the shell 1, and a furnace 2 is fixedly connected to the furnace 2. The furnace 2 is divided into the combustion chamber 2a and the partition wall 3 of the flue gas chamber 2b. The combustion chamber 2a is connected to the feed port 1a. The partition wall 3 is provided with a smoke hole 3a. The water inlet pipe 4 in the housing 1 is provided with a water storage tank 5 located at the top of the smoke chamber 2b and a steam box 6 located at the top of the combustion chamber 2a. The water inlet branch pipe 7 connected to the water tank 5, a plurality of heat exchange tubes 8 are pierced in the water storage tank 5, and one end of the water storage tank 5 is fixedly connected with a rear smoke that covers all ends of the heat exchange tubes 8. The other end of the box 9 and the water storage box 5 is fixedly connected with the front smoke box 10 that covers all the ends of the other side of the heat exchange tube 8, and the front smoke box 10 or the rear smoke box 9 is provided with a smoke box that allows the flue gas to enter the heat exchange. The pipe 8 is also a smoke exhaust structure capable of exhausting smoke. The water storage tank 5 is connected with a water inlet pipe 11 extending into the combustion chamber 2a. The water inlet pipe 11 is connected with multiple pipes located in the combustion chamber 2a and communicated with the steam box 6. Water inlet branch pipe 12, steam box 6 top is connected with steam pipe 13.

In further detail, the water inlet branch pipe 12 includes a plurality of vertical pipes 12a arranged vertically and at intervals in the combustion chamber 2a. A horizontal pipe 12b arranged horizontally and located at the top of the combustion chamber 2a is connected to it, and three steam outlet pipes 12c communicating with the steam box 6 are connected to the horizontal pipe 12b. The smoke passage hole 3a is set close to the side wall of the furnace 2 away from the feed port 1a. The smoke exhaust structure includes a smoke inlet 10a connected with the smoke chamber 2b at the bottom of the front smoke box 10, and a horizontal The front smoke box 10 is divided into a partition 14 of the lower chamber 10b and the upper chamber 10c, and the front smoke box 10 is connected with a smoke outlet door 15 located at the upper chamber 10c.

The top of the front smoke box 10 is connected with an induced draft fan 16, the furnace 2 is connected with a dust removal door 17 communicating with the combustion chamber 2a, the furnace 2 is also connected with a dust removal door 18 communicated with the flue gas chamber 2b, and the rear smoke box 9 is connected with a The ash removal door 19, the ash removal door 17 and the ash removal door 18 are all located on the side wall of the furnace 2 away from the feed port 1a, and the top of the steam box 6 is connected with a safety valve 20 and a pressure gauge 21.

When the steam boiler is in use, water enters from the water inlet pipe 4, fuel burns in the combustion chamber 2a of the furnace 2, and the high-temperature flue gas generated in the combustion chamber 2a enters the flue gas chamber 2b through the smoke passing hole 3a, and the flue gas chamber 2b The water in the inner water inlet pipe 4 and the water inlet branch pipe 7 performs heat exchange, the heated water enters the water storage tank 5, and the high-temperature flue gas enters the lower chamber 10b from the smoke inlet 10a, and then the high-temperature flue gas enters part of the heat exchange The pipe 8 leads to the rear smoke box 9, and then the high-temperature flue gas enters another part of the heat exchange and passes to the upper chamber 10c. The water and heat exchange in the water storage tank 5 is sufficient. The heated water flows from the water inlet pipe 11 to the water inlet branch pipe 12. The flame and high-temperature flue gas in the combustion chamber 2a have a high degree of heat exchange with the vertical pipe 12a, and the horizontal pipe 12b plays a role of buffering and collecting water. The heat exchange between the pipe 12b and the combustion chamber 2a is sufficient, the steam formed in it enters the steam box 6 from the steam outlet pipe 12c, and the steam is discharged from the steam pipe 13. The above process has a high utilization rate of high-temperature flue gas and high heat exchange efficiency , the water that has been heated in the water inlet branch pipe 7 is heat-exchanged again at the combustion chamber 2a to form steam at a fast speed.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Claims (6)

1. A steam boiler, comprising a housing (1) with a feed inlet (1a), the housing (1) is provided with a hearth (2) made of refractory bricks, characterized in that the The furnace (2) is fixed with a partition wall (3) that divides the furnace (2) into a combustion chamber (2a) and a flue gas chamber (2b), and the combustion chamber (2a) is connected to the feed port (1a) Through, the partition wall (3) is opened with a smoke hole (3a), the shell (1) is pierced with a water inlet pipe (4) located in the smoke chamber (2b), and the shell The body (1) is equipped with a water storage tank (5) on the top of the flue gas chamber (2b) and a steam tank (6) on the top of the combustion chamber (2a). The water inlet pipe (4) is connected to several The water inlet branch pipe (7) in the flue gas chamber (2b) and connected to the water storage tank (5), the water storage tank (5) is pierced with a plurality of heat exchange tubes (8), the water storage tank One end of (5) is fixedly connected with the rear smoke box (9) that covers all ends of one side of the heat exchange tube (8), and the other end of the water storage tank (5) is fixedly connected with the other end of the heat exchange tube (8). The front smoke box (10) is provided on all ends of one side, and the front smoke box (10) or the rear smoke box (9) is provided with a device to allow the smoke to enter the heat exchange tube (8) and discharge the smoke The smoke exhaust structure, the water storage tank (5) is connected with the water inlet pipe (11) extending into the combustion chamber (2a), and the water inlet pipe (11) is connected with multiple pipes located in the combustion chamber (2a) A water inlet branch pipe (12) inside and communicated with the steam box (6), and a steam pipe (13) is connected to the top of the steam box (6). 2. A steam boiler according to claim 1, characterized in that the water inlet branch pipe (12) includes a plurality of vertical pipes (12a) arranged vertically and at intervals in the combustion chamber (2a) , the bottom ends of the vertical pipes (12a) are connected with the water inlet pipes (11), and the top ends of the vertical pipes (12a) are connected with a lateral Pipe (12b), the horizontal pipe (12b) is connected with several steam outlet pipes (12c) communicating with the steam box (6). 3. A steam boiler according to claim 1 or 2, characterized in that the smoke passage hole (3a) is set close to the side wall of the furnace (2) away from the feed port (1a), and the The smoke exhaust structure includes a smoke inlet (10a) connected to the smoke chamber (2b) at the bottom of the front smoke box (10), and the middle part of the front smoke box (10) is fixedly connected with a level and the front smoke box (10 ) is divided into a lower chamber (10b) and an upper chamber (10c) with a partition (14), and the front smoke box (10) is connected with a smoke outlet door (15) at the upper chamber (10c). 4. A steam boiler according to claim 3, characterized in that an induced draft fan (16) is connected to the top of the front smoke box (10). 5. A steam boiler according to claim 1, characterized in that, the furnace (2) is connected with a dust removal door (17) communicating with the combustion chamber (2a), and the furnace (2) is also A soot removal door (18) connected to the flue gas chamber (2b), the rear smoke box (9) is connected with ash removal door (19), the ash removal door (17) and the ash removal door ( 18) are all located on the side wall of the furnace (2) away from the feed inlet (1a). 6. A steam boiler according to claim 1, characterized in that a safety valve (20) and a pressure gauge (21) are connected to the top of the steam box (6).