CN201735285U

CN201735285U - Boiler flue dust filtration and purification apparatus

Info

Publication number: CN201735285U
Application number: CN2010202302569U
Authority: CN
Inventors: 刘建波
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-06-21
Filing date: 2010-06-21
Publication date: 2011-02-09
Anticipated expiration: 2020-06-21

Abstract

The utility model discloses a boiler flue dust filtration and purification apparatus, which comprises a box; the box is provided with a smoke inlet, a return smoke inlet and a smoke-exhausting outlet, and a flue gas filter and an air preheater are arranged in the box. The utility model can recover residual heat, reduce the emission of heat and carbon dioxide, enhance the fire power of a boiler, increase the fire box temperature of the boiler, increase the heat efficiency of the boiler, save energy, increase the economic benefits of enterprises and protect the environment.

Description

A kind of boiler smoke filtering and purifying

Technical field

The utility model relates to a kind of boiler smoke filter, relates to a kind of boiler smoke filtering and purifying specifically, belongs to the environmental protection machinery technical field.

Background technology

The dust arrester kind that is applied in the processing boiler emission flue dust on the boiler at present is more, can be divided into two kinds of dry type and wet scrubbers substantially, the dry collector of better dust removal effect, the cast iron multicyclone is arranged, because this kind dry collector remains the theory of turn-taking of dry collector, screening is theoretical, the dust removal mechanism of boundary separation theory, the dedusting cut diameter is bigger, thinner grit is to be removed by wind in the boiler emission flue dust, therefore is difficult to reach national boiler Air Pollutant Emission one class regional standard requirement.

Thinner grit people have used wet scrubber in the discharging flue dust in order to remove, using more is impingement washing scrubber and water dust scrubber, China's coal-burning boiler dust arrester is reasonable at present, adopting many is to adopt water film type duster, through facts have proved that there are a lot of shortcomings in this equipment, owing to use the water film dedusting method perishable, be not durable, boiler afterheat can not reclaim, waste effective heat energy, owing to use the water film dedusting method to produce acid water, cause secondary pollution, there is flue dust to discharge in a large number.

The utility model content

Problem to be solved in the utility model provides a kind of boiler smoke filtering and purifying, can remove grit in the discharging flue dust, and can reclaim waste heat and abundant comburant in the flue gas, comburant be burnt once more utilize and reach smokeless, nontoxic, dustless, no sulphur, no noxious gas emission.

In order to address the above problem, the utility model by the following technical solutions:

A kind of boiler smoke filtering and purifying comprises casing, is provided with into mouth, time mouth and exhaust opening on casing, it is characterized in that: be provided with filtrating equipment of flue gas and air preheater in the described casing.

Below be the utility model for further improvement of these options:

Described filtrating equipment of flue gas comprises the one-level screen pack and is arranged on the cascade filtration net of one-level screen pack top, described one-level screen pack and cascade filtration net are separated into first smoke-box, second smoke-box and the 3rd smoke-box with the inner chamber of casing, described advance mouth and return mouth be communicated with first smoke-box respectively, exhaust opening is communicated with the 3rd smoke-box.

Further improve:

Described one-level screen pack is 80 orders, and the cascade filtration net is 100 orders.

Further improve:

Side-lower at casing is provided with dirt pocket, and described dirt pocket is communicated with second smoke-box, is provided with the dedusting mouth in the bottom of dirt pocket.

Further improve:

Described air preheater comprises some economizer banks that are arranged in the 3rd smoke-box, and the two ends of described economizer bank are connected with the shell wall of casing respectively.

Further improve:

One side of described casing is provided with collection chamber, and an end of described economizer bank is communicated with atmosphere, and the other end is communicated with collection chamber, is provided with air outlet slit on collection chamber.

Further improve:

Described economizer bank is arranged on the position of close exhaust opening in the 3rd smoke-box.

During use, the high-temp waste gas that boiler produces is sent in the casing, owing to be provided with two-layer screen pack, a small amount of trickle flue dust is still arranged in one-level screen pack filtered smoke gas, behind the cascade filtration net filtration, enter dirt pocket, be discharged from casing, reached the purpose of dedusting by the dedusting mouth.

By the pure flue gas of the higher temperatures of cascade filtration net filtration, in the 3rd smoke-box, heat the air in the economizer bank during by economizer bank again, heated air is admitted to burner hearth by collection chamber and backheat air duct, has so promptly improved fire box temperature and has reduced exhaust gas temperature again.Reached the purpose of energy-saving and emission-reduction.

The black smoke that boiler is discharged is exactly imperfect combustion carbon ion in fact, and when these pyrocarbon ions are sent back to moment of burner hearth, flue gas carries out that chemical combination decomposes and reacts with the carbon that is burning and obtain the reproducibility burning.According to the character of carbon when burning, it can at high temperature capture the oxygen in the oxygenatedchemicals, thus burning once more after the carbon dioxide in the flue gas that refluxes at high temperature is reduced into carbon monoxide, thus reached the purpose of saving coal; The backflow sulfur in smoke at high temperature is reduced the purpose that has reached desulfurization.

The high-temperature flue gas that boiler is discharged is sent boiler furnace part heat back to through smoke-returning pipeline, consume a part of heat through economizer bank, so through the discharge of smoke evacuation tube is the carbonated gas seldom of low temperature, thereby reached the purpose that has reduced CO2 emission, before the flue gas of discharging black smoke and flue dust behind cascade filtration all have been blocked in screen pack, so what be discharged from is pure smokeless, dustless gas.

The utility model can make comburant can fully burn in burner hearth, and reaches smokeless, nontoxic, dustless, no sulphur, no noxious gas emission ground purpose, not water dedusting; can not cause secondary pollution; the energy recovery waste heat reduces the heat energy discharging, reduces CO2 emission; the boiler firepower is strengthened; improve boiler hearth temperature, improve the thermal efficiency of boiler, energy savings; increase the business economic benefit, the protection environment.

The utility model is described in further detail below in conjunction with drawings and Examples:

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model embodiment;

Accompanying drawing 2 is the vertical view of accompanying drawing 1;

Accompanying drawing 3 is system's installation diagram of boiler smoke filtering and purifying among the utility model embodiment.

Among the figure: the 1-casing; 2-advances mouth; 3-returns mouth; The 4-economizer bank; The 5-exhaust opening; 6-one-level screen pack; 7-cascade filtration net; The 8-dirt pocket; 9-first smoke-box; 10-second smoke-box; 11-the 3rd smoke-box; The 12-bracing frame; The 13-flame retardant coating; The 14-collection chamber; The 15-air outlet slit; 16-backheat air duct; The 17-boiler; The 18-economizer; The 19-air-introduced machine; The 20-flue; The 21-smoke-returning pipeline; The 22-air blast; The 23-chimney; 24-dedusting mouth.

The specific embodiment

Embodiment, a kind of boiler smoke filtering and purifying, as shown in Figure 1, comprise casing 1, be provided with into mouth 2, time mouth 3 and exhaust opening 5 on casing 1, a side of casing 1 is equipped with bracing frame 12, is provided with filtrating equipment of flue gas and air preheater in the described casing 1.

Described filtrating equipment of flue gas comprises the cascade filtration net 7 that 80 purposes are made with stainless steel material with stainless steel material one-level screen pack of making 6 and 100 purposes that are arranged on one-level screen pack 6 tops, described one-level screen pack 6 and cascade filtration net 7 are separated into first smoke-box 9, second smoke-box 10 and the 3rd smoke-box 11 with the inner chamber of casing 1, the inwall of first smoke-box 9 is provided with flame retardant coating 13, described advance mouth 2 and return mouth 3 be communicated with first smoke-box 9 respectively, exhaust opening 5 is communicated with the 3rd smoke-box 11.

Side-lower at casing 1 is provided with the dirt pocket 8 that the cross section is taper, and described dirt pocket 8 is communicated with second smoke-box 10, is provided with dedusting mouth 24 in the bottom of dirt pocket 8.

Air preheater comprises the some economizer banks 4 that are arranged on the position of close exhaust opening 5 in the 3rd smoke-box 11.

As shown in Figure 2, the two ends of described economizer bank 4 are connected with the shell wall of casing 1 respectively, be provided with collection chamber 14 in a side of casing 1 and economizer bank 4 corresponding positions, one end of described economizer bank 4 is communicated with atmosphere, the other end is communicated with collection chamber 14, is provided with air outlet slit 15 on collection chamber 14.

As shown in Figure 3, during use, casing 1 is connected in the steam generator system, this steam generator system is made up of boiler 17, economizer 18, air-introduced machine 19, air blast 22 and chimney 23, described casing 1 is installed between air-introduced machine 19 and the chimney 23, advances mouth 2 and is communicated with air-introduced machine 19 by flue 20, and exhaust opening 5 is communicated with chimney 23, return mouth 3 and be communicated with boiler 17 by smoke-returning pipeline 21, the air outlet slit 15 on the collection chamber 14 is communicated with air blast 22 by backheat air duct 16.

The high-temp waste gas that boiler 17 produces is sent in the casing 1 by air-introduced machine 19, owing to be provided with two-layer screen pack, in the flue gas after one-level screen pack filtration 6 a small amount of trickle flue dust is arranged still, after filtering, cascade filtration net 7 enters dirt pocket 8, be discharged from casing 1 by dedusting mouth 24, reached the purpose of dedusting.

By the pure flue gas of higher temperatures of cascade filtration net 7 filtrations, in the 3rd smoke-box 11, heat the air in the economizer bank 4 during by economizer bank 4 again, heated air is sent into burner hearth by collection chamber 14 and backheat air duct 16 by air blast 22, has so promptly improved fire box temperature and has reduced exhaust gas temperature again.

Claims

1. a boiler smoke filtering and purifying comprises casing (1), is provided with into mouth (2), time mouth (3) and exhaust opening (5) on casing (1), and it is characterized in that: described casing is provided with filtrating equipment of flue gas and air preheater in (1).

2. a kind of boiler smoke filtering and purifying according to claim 1, it is characterized in that: described filtrating equipment of flue gas comprises one-level screen pack (6) and is arranged on the cascade filtration net (7) of one-level screen pack (6) top, described one-level screen pack (6) and cascade filtration net (7) are separated into first smoke-box (9), second smoke-box (10) and the 3rd smoke-box (11) with the inner chamber of casing (1), described advance mouth (2) and return mouth (3) be communicated with first smoke-box (9) respectively, exhaust opening (5) is communicated with the 3rd smoke-box (11).

3. a kind of boiler smoke filtering and purifying according to claim 2 is characterized in that: described one-level screen pack (6) is 80 orders, and cascade filtration net (7) is 100 orders.

4. a kind of boiler smoke filtering and purifying according to claim 2, it is characterized in that: the side-lower at casing (1) is provided with dirt pocket (8), described dirt pocket (8) is communicated with second smoke-box (10), is provided with dedusting mouth (24) in the bottom of dirt pocket (8).

5. a kind of boiler smoke filtering and purifying according to claim 1, it is characterized in that: described air preheater comprises the some economizer banks (4) that are arranged in the 3rd smoke-box (11), and the two ends of described economizer bank (4) are connected with the shell wall of casing (1) respectively.

6. a kind of boiler smoke filtering and purifying according to claim 5, it is characterized in that: a side of described casing (1) is provided with collection chamber (14), one end of described economizer bank (4) is communicated with atmosphere, the other end is communicated with collection chamber (14), is provided with air outlet slit (15) on collection chamber (14).

7. a kind of boiler smoke filtering and purifying according to claim 5 is characterized in that: described economizer bank (4) is arranged on the position of close exhaust opening (5) in the 3rd smoke-box (11).