CN202452466U

CN202452466U - Vertical type steam boiler

Info

Publication number: CN202452466U
Application number: CN2012200708609U
Authority: CN
Inventors: 裴韩佶
Original assignee: YANGZHOU STAR BOILER CO Ltd
Current assignee: Zhoukou great Boiler Co., Ltd.
Priority date: 2012-02-29
Filing date: 2012-02-29
Publication date: 2012-09-26
Anticipated expiration: 2022-02-28

Abstract

The utility model relates to a vertical type steam boiler. A burner is installed at the top of the boiler, a flame jet is located in the center of the top of a burning chamber, inner layer water pipes are arranged on the periphery of the burning chamber, the peripheries of the inner layer water pipes are provided with inner layer flues, the peripheries of the inner layer flues are provided with outer layer water pipes, the peripheries of the outer layer water pipes are provided with outer layer flues, the peripheries of the outer layer flues are provided with fire-resistant insulating layers, the inner layer water pipes and the outer layer water pipes are arranged annularly with a boiler body axis serving as a center, high-temperature fume outlets are arranged among the inner layer water pipes, the burning chamber and the inner layer flues are in communication through the high-temperature fume outlets, middle-temperature fume outlets are arranged among the outer layer water pipes, the inner layer flues and the outer layer flues are in communication through the middle-temperature fume outlets, the wall of a boiler body is provided with a fume exhaust port which is in communication with the outer layer flues, the high-temperature fume outlets and the fume exhaust port are located in the same phase, the phase difference of the middle-temperature fume outlets and the fume exhaust port is 180 degrees, the upper portion of the boiler body and the lower portion of the boiler body are respectively provided with an upper annular header and a lower annular header, and the upper annular header and the lower annular header are respectively communicated with upper pipe ports of the inner layer water pipes and lower pipe ports of the outer layer water pipes. The steam boiler is high in thermal efficiency and long in service life.

Description

A kind of vertical steam boiler

Technical field

The utility model relates to a kind of steam boiler, particularly a kind of vertical steam boiler.

Background technology

Existing vertical fume tube type steam boiler, body of heater are the tubular structure of axis normal in base, and the top smoke pipe does not have water-cooled but, and is overheated easily, seriously corroded, and the life-span is short.Adopt the combustion system of side blown type, combustor is contained in the body of heater side, and flue gas vertically flows, and the backhaul number generally has only a return stroke half, and exhaust gas temperature is higher, and the thermal efficiency is low.

The utility model content

The purpose of the utility model is, overcomes the problem that exists in the prior art, and a kind of long service life, vertical steam boiler that the thermal efficiency is high are provided.

For solving above technical problem, a kind of vertical steam boiler that the utility model provided, body of heater are the tubular structure of axis normal in base; Combustor is installed on the body of heater, is provided with combustion chamber and water pipe heating surface in the body of heater, said combustion chamber is the cylindrical space that extends along the body of heater axis; Said combustor is installed in the boiler top; Said combustor flame jet is positioned at the top center of said combustion chamber, and the periphery of said combustion chamber is furnished with the internal layer water pipe, and the periphery of said internal layer water pipe is the internal layer flue; The periphery of said internal layer flue is furnished with outer water pipe; The periphery of said outer water pipe is outer flue, and the periphery of said outer flue is a refractory insulating layer, and said internal layer water pipe and outer water pipe are the center annular configuration with the body of heater axis; Be provided with the high-temperature flue gas outlet that is communicated with said combustion chamber and said internal layer flue between the said internal layer water pipe; Be provided with the middle temperature exhanst gas outlet that is communicated with said internal layer flue and said outer flue between the said outer water pipe; Said furnace body wall is provided with the exhaust opening that is communicated with said outer flue; The outlet of said high-temperature flue gas is positioned on the same phase place with said exhaust opening, said in 180 ° of the phasic differences mutually of warm exhanst gas outlet and said exhaust opening; The upper and lower of said body of heater is respectively equipped with annular header, and the bottom surface of last annular header is connected with the upper orifice of each internal layer water pipe and outer water pipe, and the end face of following annular header is connected with the lower nozzle of each internal layer water pipe and outer water pipe.

With respect to prior art; The utility model has been obtained following beneficial effect: (1) internal layer water pipe is a radiation heating-surface towards a side of combustion chamber, and high-temperature flue gas gets into the internal layer flue from the outlet of the high-temperature flue gas between the internal layer water pipe, and flue gas is balancedly divided right and left; Warm exhanst gas outlet along the internal layer flue transversal flow water pipe of ring-type and in flowing to; Get into outer flue, flue gas is balancedly divided right and left once more, along the outer flue transversal flow water pipe of ring-type and flow to exhaust opening; Form three backhauls, improved heat exchange efficiency; Enlarged the combustion chamber, it is long-pending to have improved radiation heating-surface, accelerates flue gas flow rate and has improved the convection heat transfer' heat-transfer by convection effect, and boiler can fully absorb the heat in the flue gas, has further improved heat exchange efficiency, has reduced exhaust gas temperature.(2) internal layer water pipe and outer water pipe adopt the working method of full immersed type; The height of the extremely low alarm water level of last annular header, the height above water pipe makes boiler water tube all work under water always; Avoid the generation of superheating phenomenon, prolonged the service life of boiler.

Description of drawings

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described in further detail, accompanying drawing only provides reference and explanation usefulness, and is non-in order to restriction the utility model.

Fig. 1 is the front view of the utility model vertical steam boiler.

Fig. 2 is along the cutaway view of A-A among Fig. 1.

Fig. 3 is the water circulation sketch map of the utility model vertical steam boiler.

Among the figure: 1. combustor; 2. combustion chamber; 3. internal layer water pipe; 3a. high-temperature flue gas outlet; 4. internal layer flue; 5. outer water pipe; 5a. middle temperature exhanst gas outlet; 6. outer flue; 7. refractory insulating layer; 8. go up annular header; 8a. steam (vapor) outlet; 9. descend annular header; 10. exhaust opening.

The specific embodiment

Like Fig. 1, Fig. 2 and shown in Figure 3, the vertical steam boiler of the utility model, body of heater are the tubular structure of axis normal in base; Be provided with combustion chamber 2 in the body of heater, combustion chamber 2 is the cylindrical space that extends along the body of heater axis, and combustor 1 is installed in the boiler top; The combustor flame jet is positioned at the top center of combustion chamber 2, and the periphery of combustion chamber 2 is furnished with internal layer water pipe 3, and the periphery of internal layer water pipe 3 is an internal layer flue 4; The periphery of internal layer flue 4 is furnished with outer water pipe 5; The periphery of outer water pipe 5 is outer flue 6, and the periphery of outer flue 6 is a refractory insulating layer 7, and internal layer water pipe 3 and outer water pipe 5 are the center annular configuration with the body of heater axis.The upper and lower of body of heater is respectively equipped with annular header, and the bottom surface of last annular header 8 is connected with the upper orifice of each internal layer water pipe and outer water pipe, and the top of last annular header 8 is provided with steam (vapor) outlet 8a.The end face of following annular header 9 is connected with the lower nozzle of each internal layer water pipe and outer water pipe.

As shown in Figure 2, be provided with the high-temperature flue gas outlet 3a that is communicated with combustion chamber 2 and internal layer flue 4 between the internal layer water pipe 3, sealing between remaining internal layer water pipe 3.Be provided with the middle temperature exhanst gas outlet 5a that is communicated with internal layer flue 4 and outer flue 6 between the outer water pipe 5; Furnace body wall is provided with the exhaust opening 10 that is communicated with outer flue 6; High-temperature flue gas outlet 3a and exhaust opening 10 are positioned on the same phase place, 180 ° of the phasic differences mutually of middle temperature exhanst gas outlet 5a and exhaust opening 10.

Internal layer water pipe 3 is a radiation heating-surface towards a side of combustion chamber; High-temperature flue gas gets into internal layer flue 4 from the high-temperature flue gas between internal layer water pipe outlet 3a, and flue gas is balancedly divided right and left, warm exhanst gas outlet 5a along the internal layer flue 4 transversal flow water pipes of ring-type and in flowing to; Get into outer flue 6; Flue gas is balancedly divided right and left once more, along the outer flue 6 transversal flow water pipes of ring-type and flow to exhaust opening 10, forms three backhauls.

As shown in Figure 3, in the internal layer water pipe 3, be radiation heating-surface towards a side of combustion chamber; Temperature is high, is convection heating surface towards a side of internal layer flue, and temperature is low; Therefore in the internal layer water pipe, form inboard making progress and flow the good water cycle heat exchange of lateral current downflow.In outer water pipe 5; Towards a side contacts of internal layer flue be high-temperature flue gas, towards a side contacts of outer flue be middle low-temperature flue gas, same temperature difference is very stable; Therefore in outer water pipe, also form inboard making progress and flow the good water cycle heat exchange of lateral current downflow.

Can install the condenser of pressure-bearing at the flue afterbody additional; Soft water is directly given the boiler furnace moisturizing through condenser, can maximally utilise sensible heat and latent heat in the flue gas like this, has improved the inflow temperature of boiler; Reduce exhaust gas temperature, thereby further improve the thermal efficiency of boiler; In the water vapor condensation dewfall process in the flue gas, absorbed the NO in the flue gas _X, SO _XDeng pernicious gas, reduce discharge of harmful gases concentration.In order further to improve the steam quality of boiler, can install water separator at steam (vapor) outlet, dryness fraction of steam is reached more than 95%.

The above is merely the preferable possible embodiments of the utility model, non-so the limitation the utility model scope of patent protection.Except that the foregoing description, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.

Claims

1. vertical steam boiler, body of heater is the tubular structure of axis normal in base, and combustor is installed on the body of heater; Be provided with combustion chamber and water pipe heating surface in the body of heater; It is characterized in that: the cylindrical space of said combustion chamber for extending along the body of heater axis, said combustor is installed in the boiler top, and said combustor flame jet is positioned at the top center of said combustion chamber; The periphery of said combustion chamber is furnished with the internal layer water pipe; The periphery of said internal layer water pipe is the internal layer flue, and the periphery of said internal layer flue is furnished with outer water pipe, and the periphery of said outer water pipe is outer flue; The periphery of said outer flue is a refractory insulating layer, and said internal layer water pipe and outer water pipe are the center annular configuration with the body of heater axis; Be provided with the high-temperature flue gas outlet that is communicated with said combustion chamber and said internal layer flue between the said internal layer water pipe; Be provided with the middle temperature exhanst gas outlet that is communicated with said internal layer flue and said outer flue between the said outer water pipe; Said furnace body wall is provided with the exhaust opening that is communicated with said outer flue; The outlet of said high-temperature flue gas is positioned on the same phase place with said exhaust opening, said in 180 ° of the phasic differences mutually of warm exhanst gas outlet and said exhaust opening; The upper and lower of said body of heater is respectively equipped with annular header, and the bottom surface of last annular header is connected with the upper orifice of each internal layer water pipe and outer water pipe, and the end face of following annular header is connected with the lower nozzle of each internal layer water pipe and outer water pipe.