CN201496990U

CN201496990U - Two-section steam-heated air pre-heater

Info

Publication number: CN201496990U
Application number: CN2009202311226U
Authority: CN
Inventors: 马建南
Original assignee: CHANG ZHOU BAOYU INDUSTRIAL EQUIPMENT Co Ltd
Current assignee: CHANG ZHOU BAOYU INDUSTRIAL EQUIPMENT Co Ltd
Priority date: 2009-09-03
Filing date: 2009-09-03
Publication date: 2010-06-02
Anticipated expiration: 2019-09-03

Abstract

The utility model relates to a heat exchanger, in particular to a two-section steam air pre-heater used for preheating the air entering a waste incinerator. The two-section steam air pre-heater structurally comprises a rectangular box body, wherein an air inlet and an air outlet are formed on the box body; two heating sections, i.e. a high-pressure section and a low-pressure section, are arranged in the box body and connected by the flanges for the box body; straight heat-exchange tubes are arranged in the box body; a steam inlet pipe and a steam outlet pipe are vertically arranged on the outer side of the box body; a row of horizontal tubes which are horizontally arranged and communicated with each other and achieve the effect of flow division are arranged on the steam inlet pipe; a row of vertical tubes which are communicated with each other and perpendicular to the horizontal tubes and achieve the effect of heat exchange are arranged on each horizontal tube; the steam flows downwards into the corresponding horizontal tubes in a lower row from each row of vertical tubes, and finally converges into the steam outlet pipe; and the vertical tubes are in the matrix distribution. By adopting the two-section steam heating manner, the utility model can improves the utilization rate of steam, reduce the energy consumption and save the cost.

Description

The two-part steam type airheater

Technical field

The utility model relates to a kind of heat exchanger, enters a kind of two-part steam type airheater of waste incineration furnace air in particular for preheating.

Background technology

In the incineration treatment of garbage process, for waste of low heating value is better burnt, guarantee that the combustion air that enters the incinerator burner hearth remains on stable temperature, combustion air must be through after the air preheater heating, just can send into incinerator.

Existing air preheat method adopts fume afterheat, contains steam and sulfuric acid vapor in the flue gas, and condition of work is more abominable, occurs cold end corrosion and stifled ash easily.In case cold end corrosion and stifled ash take place, will cause exhaust gases passes to stop up, the air inducing resistance increases, boiler positive pressuring combustion, this has not only reduced boiler output, even causes and be forced to blowing out.The result of corrosion can cause the air preheater pipe to reveal and damage, and causes seriously and leaks out, and causes that combustion conditions worsens, and the heating surface of having to often change when serious had both increased maintenance load and spillage of material, had influenced the normal operation of boiler again.Cold air enters fume side, also can reduce the cigarette temperature, quickens the speed of cold end corrosion and stifled ash, thereby influences the safe operation of boiler, reduces service life of equipment greatly, and flue gas is revealed also can cause environmental pollution.

Adopt steam preheating just can solve above problem, but existing vapor preheater adopts the coiled heat exchanger tube, its condensed water that produces when low temperature amasss in pipe bent position, increased the resistance that steam is subjected to by pipe bent position, influence the heat exchange effect, and the preheater steam utilization efficient of this kind design is not high, causes the waste of the energy easily.

The utility model content

Technical problem to be solved in the utility model is: provide a kind of two-part steam type airheater, to solve the not high technical problem of original preheater steam utilization.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of two-part steam type airheater, its structure is a rectangular box, casing is provided with air inlet and air outlet, be provided with two bringing-up sections in the casing, comprise high pressure section and low pressure stage, adopt box flange to connect between the bringing-up section, be provided with the straight pipe type heat exchanger tube in the casing, heat exchanger tube comprises transverse tube and vertical tube, casing outside upper and lower settings has steam inlet pipe and steam outlet pipe, this advances, the effect of steam outlet pipe is similar to the collection case, is communicated with the transverse tube that plays shunting action that a row of horizontal is provided with on the described steam inlet pipe, is communicated with a vertical tube that queues the heat exchange effect on every transverse tube, vertical tube is vertical with transverse tube, every row's vertical tube flows to corresponding lower transverse tubule downwards, and the following horizontal row pipe turnover steam pipe that confluxes at last, described vertical tube are that matrix form is arranged.

For volume that reduces casing and the service efficiency that improves preheater, further: the transverse tube that respectively is provided with two rows of mutually staggered on steam inlet pipe and the steam outlet pipe respectively.

For air is distributed fast, reach the effect of uniform heat exchange, further: the air inlet place in casing is provided with the deflector that air is distributed fast.

The beneficial effects of the utility model: adopted the two-part Steam Heating, increased the utilization rate of steam, reduced energy resource consumption, saved cost.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1 is a main TV structure schematic diagram of the present utility model;

Fig. 2 is a side-looking structural representation of the present utility model;

Fig. 3 is a plan structure schematic diagram of the present utility model;

Wherein: 1, casing, 2, air inlet, 3, air outlet, 4, steam inlet pipe, 5, steam outlet pipe, 6, transverse tube, 7, vertical tube, 8, deflector.

The specific embodiment

With preferred embodiment the utility model is described in further detail in conjunction with the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.

As Fig. 1, shown in 2, a kind of two-part steam type airheater, its structure is a rectangular box 1, casing 1 is provided with air inlet 2 and air outlet 3, be provided with two bringing-up sections in the casing 1, comprise high pressure section II and low pressure stage I, adopt box flange to connect between the bringing-up section, be provided with the straight pipe type heat exchanger tube in the casing 1, heat exchanger tube comprises transverse tube 6 and vertical tube 7, and casing 1 outside is respectively arranged with steam inlet pipe 4 and steam outlet pipe 5 up and down, and this advances, the effect of steam outlet pipe is similar to the collection case, be communicated with the transverse tube 6 that plays shunting action that a row of horizontal is provided with on the described steam inlet pipe 4, be communicated with a vertical tube 7 that queues shunting action on every transverse tube 6, vertical tube 6 is vertical with transverse tube 7, and every row's vertical tube 7 flows to corresponding lower transverse tubule 6 downwards, following horizontal row pipe 6 confluxes at last and passes in and out steam pipe 5, and described vertical tube 7 is that matrix form is arranged.

Respectively be provided with the transverse tube 6 of two rows of mutually staggered on steam inlet pipe 4 and the steam outlet pipe 5 respectively, the purpose that two horizontal row pipes 6 are set is in order to reduce the volume of casing 1 under the situation that guarantees the preheater result of use, to prevent that casing 1 from causing use dangerous because of volume is excessive.

In order to effectively utilize the energy, two bringing-up sections that are provided with in the casing 1, comprise high pressure section and low pressure stage, high pressure section adopts the superheated steam of boiler export, the steam that low pressure stage adopts extracted steam from turbine to produce, do not need to supply in addition steam, size according to required heat exchange area, bringing-up section is divided into some set of heat exchange tubes, and every group of heat exchanger tube promptly comprise the two rows transverse tube and be arranged on the vertical tube that becomes matrix to arrange between the two horizontal row pipes, and the employing box flange is connected between group and the group or between the bringing-up section, this assembly structure, be convenient to realize maximizing, modularization and modularization are convenient to make, install, transportation and on-the-spot assembling.

For air is distributed fast, reach the effect of uniform heat exchange, 1 air inlet 2 places are provided with the deflector 8 that air is distributed fast in casing.

During use, air enters in the preheater from air inlet, and distributes fast evenly by deflector, and air is sent air outlet after by the Steam Heating in the heat exchanger tube, and preheating section is divided into I section and II section, concrete parameter such as following table:

Claims

1. A two-stage steam air preheater has a box structure, and the box (1) is provided with an air inlet (2) and an air outlet (3), and is characterized in that: the box is provided with two A heating section, including a high-pressure section and a low-pressure section. The heating sections are connected by box body flanges. The box body (1) is equipped with straight tube heat exchange tubes, and the upper and lower ends of the box body (1) are respectively provided with inlet steam Pipe (4) and outlet pipe.

2. The two-stage steam-air preheater according to claim 1, characterized in that: the heat exchange tubes include horizontal tubes (6) and vertical tubes (7), and the steam inlet tube (4) The top is connected with a row of horizontal tubes (6) arranged horizontally to act as a shunt, and each horizontal tube (6) is connected with a row of vertical tubes (7) for heat exchange. The vertical tubes (7) and the horizontal tubes (6) ) vertically, each row of vertical pipes (7) flows downward into the corresponding lower horizontal pipes (6), and the lower row of horizontal pipes (6) finally converges into and out of the steam pipes (5), and the vertical pipes (7) are arranged in a matrix.

3. The two-stage steam-air preheater according to claim 2, characterized in that: the steam inlet pipe (4) and the steam outlet pipe (5) are respectively provided with two rows of interlaced horizontal pipes (6).

4. The two-stage steam-air preheater according to claim 1, characterized in that: the air inlet (2) in the box is provided with a deflector (8) for rapidly distributing the air.