CN201476043U

CN201476043U - Steam air preheater

Info

Publication number: CN201476043U
Application number: CN2009202313594U
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: 2009-08-27
Filing date: 2009-08-27
Publication date: 2010-05-19
Anticipated expiration: 2019-08-27

Abstract

The utility model relates to a heat exchanger, in particular to a steam air preheater used for preheating air entering a garbage incinerator. The steam air preheater is a rectangular box body. An air inlet and an air outlet are arranged on the box body. Straight heat exchange tubes are arranged in the box body. A steam inlet pipe and a steam outlet pipe are arranged at the upper part and the lower part of the external side of the box body. The steam inlet pipe is communicated with a row of horizontally-arranged transverse pipes with distribution function. Each transverse pipe is communicated with a row of vertical pipes with heat exchange function. The vertical pipes are perpendicular to the transverse pipes. Steam in each row of vertical pipes downward flows into a corresponding lower transverse pipe. Steam in the lower row of transverse pipes finally converges and flows into the steam output pipe. The vertical pipes are arranged in an array. The utility model has the advantages that the service life of the device is long, the occupied area is small, the structure is compact, the material consumption is low, the weight is 35 percent lighter than the weight of the coil-tube preheater with the same heat exchange area, the heat loss caused by radiation is small, the heat dispersion efficiency is high, the steam passing resistance is small, the maintenance is convenient and the like.

Description

A kind of steam type airheater

Technical field

The utility model relates to a kind of heat exchanger, enters a kind of vapor preheater 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, has increased steam by the resistance that pipe bent position is subjected to, and influences the heat exchange effect.And during the preheater that heat exchange area is very big if desired, the preheater manufacturing of said structure, installation and transportation are all very inconvenient.

The utility model content

Technical problem to be solved in the utility model is: a kind of steam type airheater is provided, with solve original preheater service life short, machine weight is big, the heat exchange effect is low and technical problems such as the preheater manufacturing of large scale structure, installation and transportation inconvenience.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of steam type airheater, its structure is a rectangular box, casing is provided with air inlet and air outlet, 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, be communicated with the transverse tube that plays shunting action that a row of horizontal is provided with on the described steam inlet pipe, be communicated with a vertical tube that queues the heat exchange effect on every transverse tube, vertical tube is vertical with transverse tube, and every row's vertical tube flows to corresponding lower transverse tubule downwards, 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.

In order to guarantee that transverse tube is fixed in the casing and back expansion of being heated can not have influence on the work of whole preheater, further: go up the horizontal row pipe and fixedly connected with box body wall near an end of steam inlet pipe, the two ends of the other end and following horizontal row pipe all are equipped with thermal expansion equipment.

A nearlyer step ground: described thermal expansion equipment is arranged on the box body wall outside, has two resilient U-shaped plates up and down, each fixedly connected plate sealing together of U-shaped plate both sides, and transverse tube passes sealing plate and stretches out outside the casing.

In order to prevent the shake in the heat exchanger course of work, further: band steel support fixation heat exchanger tube is set in the casing of preheater.

For the water that steam cooling back is formed can better flow out, further: form certain angle between steam outlet pipe and the horizontal plane, angular range is 1-5 °.

In order to effectively utilize the energy, further: 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.

In order to solve the heat exchange area of large heat exchanger, further: bringing-up section is divided into some set of heat exchange tubes, every group of heat exchanger tube promptly comprises the vertical tube of two rows transverse tube and two horizontal row Guan Shangcheng rectangular arranged, the group with the group between or between the bringing-up section employing box flange be connected.This assembly structure is convenient to realize maximizing, and modularization and modularization are convenient to make, are installed and on-the-spot assembling.

For equipment being carried out the periodic maintenance cleaning, further: be provided with the maintenance section between high pressure section and low pressure stage, the maintenance section is provided with inspection manhole and blow device.

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: owing to using clean energy resource to avoid being revealed the pollution of environment and the generation of cold end corrosion and stifled ash by flue gas, service life of equipment prolongs greatly; Heating surface area of the present invention is big, and air is heated evenly, temperature stabilization; Floor space of the present invention is little, compact conformation, and material consumption is few, and the coiled preheater of the same heat exchange area of weight ratio is light by 35%; It is little that the present invention also has radiation loss, thermal efficiency height, advantage such as the current resistance of steam is little, and is easy to maintenance.

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;

Fig. 4 is the structural representation of the utility model thermal expansion equipment;

Wherein: 1, casing, 2, air inlet, 3, air outlet, 4, steam inlet pipe, 5, steam outlet pipe, 6, transverse tube, 7, vertical tube, 8, the U-shaped plate, 9, sealing plate, 10, blow device, 11, manhole, 12, 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 Figure 1-3, a kind of 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 the straight pipe type heat exchanger tube in the casing 1, heat exchanger tube comprises transverse tube 6 and vertical tube 7, casing 1 outside is respectively arranged with steam inlet pipe 4 and steam outlet pipe 5 up and down, this advances, the effect of steam outlet pipe is similar to the collection case, is 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, is communicated with a vertical tube 7 that queues shunting action on every transverse tube 6, vertical tube 6 vertical with transverse tube 7, every row's vertical tube 7 flows to corresponding lower transverse tubule 6 downwards, and 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.

Consider the thermal expansion after forewarmer heat exchange tube and casing 1 housing are heated, designed unique thermal expansion equipment, this thermal expansion equipment is arranged on the casing 1 wall outside, have two resilient U-shaped plates 8 up and down, each fixedly connected plate 9 sealing together of U-shaped plate 8 both sides, transverse tube 6 passes sealing plate 9 and stretches out outside the casing 1, and transverse tube 6 is fixedlyed connected with casing 1 wall near an end of steam inlet pipe 4.

In order to prevent that shake causes the heat exchanger tube displacement in the heat exchanger course of work, band steel support fixation heat exchanger tube is set in the casing 1 of preheater.

For the water that steam cooling back is formed can better flow out, form certain angle between steam outlet pipe 5 and the face, angular range is 1-5 °.

In order to effectively utilize the energy, be provided with two bringing-up sections 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 making things convenient for the preheater internal overhaul, a maintenance section is set between high pressure section and low pressure stage, the maintenance section is provided with inspection manhole 11 and blow device 10, and equipment is carried out periodic cleaning.

For air is distributed fast, reach the effect of uniform heat exchange, 1 air inlet 2 places are provided with the deflector 12 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. steam type airheater, has body structure, casing (1) is provided with air inlet (2) and air outlet (3), it is characterized in that: casing is provided with the straight pipe type heat exchanger tube in (1), heat exchanger tube comprises transverse tube (6) and vertical tube (7), casing (1) outside upper and lower side is respectively arranged with steam inlet pipe (4) and steam outlet pipe, 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 the heat exchange effect on the every transverse tube (6), vertical tube (7) is vertical with transverse tube (6), 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.

2. steam type airheater according to claim 1 is characterized in that: the transverse tube (6) that respectively is provided with two rows of mutually staggered on described steam inlet pipe (4) and the steam outlet pipe (5) respectively.

3. steam type airheater according to claim 1, it is characterized in that: the described horizontal row pipe (6) of going up is fixedlyed connected with casing (1) wall near an end of steam inlet pipe (4), and the two ends of the other end and following horizontal row pipe (6) are provided with and make box sealing guarantee the thermal expansion equipment that can be extended out casing (1) and fixedly connected with casing (1) wall after transverse tube (6) is heated again.

4. steam type airheater according to claim 3, it is characterized in that: described thermal expansion equipment is arranged on casing (1) the wall outside, have two resilient U-shaped plates (8) up and down, each fixedly connected plate sealing together (9) of U-shaped plate (8) both sides, transverse tube (6) passes sealing plate (9) and stretches out outside the casing (1).

5. steam type airheater according to claim 1 is characterized in that: described heat exchanger tube is supported and fixed in the casing by band steel.

6. steam type airheater according to claim 1 is characterized in that: form certain angle between described steam outlet pipe (5) and the horizontal plane, angular range is 1-5 °.

7. steam type airheater according to claim 1 is characterized in that: be provided with two bringing-up sections in the described casing, comprise high pressure section and low pressure stage, adopt box flange to connect between the bringing-up section.

8. steam type airheater according to claim 1, it is characterized in that: bringing-up section is divided into some set of heat exchange tubes, every group of heat exchanger tube promptly comprises the vertical tube of two rows transverse tube and two horizontal row Guan Shangcheng rectangular arranged, the group with the group between or between the bringing-up section employing box flange be connected.

9. steam type airheater according to claim 1 is characterized in that: be provided with the maintenance section between described high pressure section and the low pressure stage, the maintenance section is provided with inspection manhole (11) and blow device (10).

10. steam type airheater according to claim 1 is characterized in that: air inlet (2) locates to be provided with the deflector (12) that air is distributed fast in the described casing.