CN211725320U

CN211725320U - High temperature denitration dust removal integrated device

Info

Publication number: CN211725320U
Application number: CN201922335374.XU
Authority: CN
Inventors: 荣卫龙; 郭勇; 边波; 巩晓
Original assignee: Shandong Aiyipu Environmental Protection Technology Co ltd
Current assignee: Shandong Aiyipu Environmental Protection Technology Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-10-23
Anticipated expiration: 2029-12-20

Abstract

The utility model relates to a flue gas denitration field, concretely relates to high temperature denitration dust removal integrated device, including import flue, bag collector, import flue and bag collector intercommunication, bag collector includes the casing, is equipped with the filter bag in the casing, and filter bag upper portion is equipped with the pulse soot blower, and the casing bottom is equipped with the ash bucket, still including spouting ammonia device and catalyst, instituteThe ammonia spraying device comprises an ammonia water storage tank and an ammonia spraying grid, the ammonia spraying grid is arranged in the inlet flue and is connected with the ammonia water storage tank arranged outside through a pipeline, and the catalyst is arranged on the upper part of the pulse soot blower in the shell. The utility model has the advantages of reasonable design, the integration of denitration dust removal has practiced thrift equipment occupation of land space, reduce cost to dust removal denitration effect is showing, can reach that the particulate matter is less than 5mg Nm³Nitrogen oxides denitrated to 30mg/Nm³The method is suitable for industrial production and reduces the cost.

Description

High temperature denitration dust removal integrated device

Technical Field

The utility model relates to a flue gas denitration field, concretely relates to high temperature denitration dust removal integrated device.

Background

Along with the continuous improvement of life quality of China in recent years, the demand of people for energy is larger and larger, the consumption of coal and the like is increased year by year, pollutants in the atmosphere are increased sharply, and the life quality of people in China is influenced by environmental pollution. In recent years, corresponding policies are put forward in China to solve the problem of atmospheric pollution, pollutants in the atmosphere mainly comprise nitrogen oxide, sulfur dioxide, dust and the like, the nitrogen oxide is one of main components causing haze and photochemical smog, the existing main technology for solving the nitrogen oxide is an SCR denitration technology, and the technology mainly comprises ammonia spraying, a catalyst and the like. Traditional sack removes dust and is able to bear or endure the difference in temperature, and the resistance is high, can't satisfy the current situation, and current cement denitration dust content is higher simultaneously, and is great to catalyst wearing and tearing, life weakens, and there is engineering process design complicacy simultaneously, and soot blower requires highly, and the catalyst blocks up easily, and area and steel construction are great etc. phenomenon.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a high temperature denitration dust removal integrated device unites two into one dust remover and denitration reactor through unique design, when saving equipment area cost, the dust removal denitration is efficient, and device operating resistance is little, very is fit for industrial production and uses, and investment cost greatly reduces.

The utility model provides a the utility model discloses a realize through following technical scheme:

a high-temperature denitration and dust removal integrated device comprises an inlet flue and a bag type dust collector, wherein the inlet flue is communicated with the bag type dust collector, the bag type dust collector comprises a shell, a filter bag is arranged in the shell, a pulse dust blower is arranged at the upper part of the filter bag, a dust hopper is arranged at the bottom of the shell, the high-temperature denitration and dust removal integrated device also comprises an ammonia spraying device and a catalyst, the ammonia spraying device comprises an ammonia water storage tank and an ammonia spraying grid, the ammonia spraying grid is arranged in the inlet flue and is connected with the ammonia water storage tank arranged outside through a pipeline, and the catalyst is arranged at the upper part of the pulse dust blower in;

the mixing device is arranged between an ammonia injection grid in the inlet flue and the bag type dust collector, generally adopts a flow disturbing plate structure, and enhances the mixing of the flue gas and the ammonia through flow disturbance;

wherein, the catalyst is a honeycomb ceramic carrier catalyst and is arranged on a steel support frame fixed on the upper part of the pulse soot blower;

wherein the filter bag is a metal fiber filter bag, and the filtering precision is within 5 mu m;

a diversion flue is also arranged between the inlet flue and the bag-type dust collector, and flue gas is uniformly introduced into the bag-type dust collector through the diversion flue, so that the flue gas is more dispersed, and the flue gas is prevented from being gathered and being in a point to influence the dust removal effect;

wherein, the ash bucket bottom is equipped with the heat tracing system, and the effectual dust scale deposit that prevents the deashing difficulty.

The utility model has the advantages that: (1) the denitration and dust removal are integrated, so that the occupied space of equipment is saved, and the cost is reduced; (2) the metal fiber filter bag is used, and compared with the traditional cloth bag, the running resistance is less than 1200pa, so that the running cost is greatly saved; (3) the dust removal and denitration effects are obvious, and the particle size can be less than 5mg/Nm³Nitrogen oxides denitrated to 30mg/Nm³The content of the compound is less than the content of the compound; (4) the abrasion of the catalyst is reduced, the service life of the catalyst is prolonged, and the cost is reduced.

Drawings

Fig. 1 is a structural view of the present application.

In the figure, 1, an ammonia water storage tank, 2, an inlet flue, 3, an ammonia spraying grid, 4, a mixing device, 5, a diversion flue, 6, an ash hopper, 7, a heat tracing device, 8, a shell, 9, a metal fiber filter bag, 10, a steel support frame, 11, an SCR catalyst, 12, an outlet flue, 13, a pulse soot blower, 14 and a metering pump.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in fig. 1, a high temperature denitration dust removal integrated device, including import flue 2, bag collector, 2 one end of import flue are connected with the boiler, the high temperature flue gas of direct leading-in boiler, and the other end communicates to the import of bag collector through water conservancy diversion flue 5, is equipped with the honeycomb duct of equidirectional usually in the water conservancy diversion flue 5, can be with the even not equidirectional of direction of flue gas for the even bag collector that lets in of flue gas can not gather in a bit, influences the dust removal effect. The internally mounted that 2 one end of inlet flue is close to water conservancy diversion flue 5 has mixing arrangement 4, and mixing arrangement 4 is the structure that inside was equipped with the spoiler, and the flue gas passes through mixing arrangement 4, and the effect of spoiler extends the dead time and disturbs gaseous flow direction, reaches intensive mixing's effect. Be equipped with in the import flue 2 of mixing arrangement 4 one side and spout ammonia grid 3, spout ammonia grid 3 and wear out import flue 2 through the pipeline, communicate to the installation in the aqueous ammonia storage tank 1 of outside, spout ammonia grid 3 and be used for mixing with the high temperature flue gas in the even import flue 2 that spouts of aqueous ammonia. A metering pump 14 is also typically provided in the piping to control the amount of ammonia that is sprayed.

The bag type dust collector comprises a shell 8, an inlet of the shell 8 is communicated with a flow guide flue 5, a metal fiber filter bag 9 is arranged inside the shell 8, the filtering precision is 5 micrometers, and meanwhile, the metal fiber filter bag 9 can bear the high temperature within 500 ℃, so that the bag type dust collector is very suitable for dust collection of high-temperature flue gas. The flue gas is introduced into the shell 8 through the diversion flue 5 and is uniformly dispersed to all directions of the metal fiber filter bag 9, so that the metal fiber filter bag 9 can fully exert the filtering effect. Pulse soot blower 13 is installed on 9 upper portions of metal fiber filter bag for blow off the dust that metal fiber filter bag 9 crossed to 8 bottoms of casing, and collect by the ash bucket 6 of locating 8 bottoms of casing, 6 bottoms of ash bucket still are equipped with heat tracing device 7, prevent bottom dust scale deposit through the heating, and it is more convenient to clear up. The upper portion of pulse soot blower 13 is installed steel support frame 10, has placed SCR catalyst 11 on the steel support frame 10, and SCR catalyst 11 selects honeycomb ceramics as the SCR catalyst of carrier usually for catalyzing the nitrogen oxide in the high temperature flue gas after mixing with the aqueous ammonia and decompose into nitrogen and water, accomplish the denitration. The denitrated flue gas is discharged out of the bag type dust collector through an outlet flue 12 at the top.

The using process of the device is as follows: high-temperature flue gas of the boiler is discharged and then enters an inlet flue 2, meanwhile, ammonia water in an ammonia water storage tank 1 is sprayed into the inlet flue through an ammonia spraying grid 3 through a metering pump 14, the ammonia water and the high-temperature flue gas are mixed and fully mixed under the action of a turbulence plate in a mixing device 4, the mixture is uniformly guided to a metal fiber filter bag 9 through a flow guide flue 5, the mixed flue gas is dedusted through the metal fiber filter bag 9, and filtered dust is blown down to a bottom dust hopper 6 by a pulse soot blower 13 on the upper portion of the metal fiber filter bag 9 to be collected. The flue gas continues to rise after being dedusted by the metal fiber filter bag 9 and rises to the SCR catalyst 11 part, nitrogen in the mixed flue gas is oxidized into decomposed nitrogen and water under the action of the SCR catalyst 11, denitration is completed, and the denitrated flue gas continues to rise to the outlet flue 12 at the top and is discharged. The smoke passing through the device can reach that the particulate matters are less than 5mg/Nm³Nitrogen oxides denitrated to 30mg/Nm³The effect is obvious, the running resistance is less than 1200pa, and the running cost is greatly saved.

Claims

1. The utility model provides a high temperature denitration dust removal integrated device, includes import flue, bag collector, import flue one end and boiler intercommunication, the other end and bag collector intercommunication, bag collector includes the casing, is equipped with the filter bag in the casing, and filter bag upper portion is equipped with the pulse soot blower, and the casing bottom is equipped with the ash bucket, and its characterized in that still includes and spouts ammonia device and SCR catalyst, it includes the aqueous ammonia storage tank and spouts the ammonia grid to spout the ammonia device, in the import flue was located to spout the ammonia grid, spout the ammonia grid and pass through the pipeline and be connected with locating outside aqueous ammonia storage tank, pulse soot blower upper portion in the casing is located to the SCR catalyst.

2. The integrated device for high-temperature denitration and dust removal of claim 1, further comprising a mixing device, wherein the mixing device is arranged between the ammonia injection grid and the bag type dust remover in the inlet flue.

3. The integrated device for high-temperature denitration and dust removal as claimed in claim 2, wherein the mixing device is a spoiler.

4. The integrated device for high-temperature denitration and dust removal of claim 1, wherein the SCR catalyst is a honeycomb ceramic carrier SCR catalyst, and the SCR catalyst is arranged on a steel support frame fixed on the upper part of the pulse soot blower.

5. The integrated device for high-temperature denitration and dust removal as claimed in claim 1, wherein the filter bag is a metal fiber filter bag, and the filtering precision is within 5 μm.

6. The integrated device for high-temperature denitration and dust removal of claim 1, wherein a flow guide flue is further arranged between the inlet flue and the bag type dust collector.

7. The integrated device for high-temperature denitration and dust removal as claimed in claim 1, wherein a heat tracing system is arranged at the bottom of the ash hopper.