CN202237678U - Waste incineration flue gas purification device - Google Patents

Abstract

The utility model relates to a garbage incineration flue gas purification device, comprising an incineration boiler (12), characterized in that it also comprises: a bag dust collector (9), the bag dust collector (9) is connected to the exhaust gas discharge pipeline of the incineration boiler; a water spray flue gas treatment tower (6), the water spray flue gas treatment tower (6) is connected to the exhaust pipe of the bag dust collector (9); an induced draft fan (7), the induced draft fan (7) is arranged on the connecting pipe between the water spray flue gas treatment tower (6) and the bag dust collector (9); a cyclone dehydrator (4), the cyclone dehydrator (4) is connected to the exhaust pipe of the water spray flue gas treatment tower (6), and the purified flue gas is discharged from a chimney (5) connected to the cyclone dehydrator (4) after dehydration and dust removal. The beneficial effect of the utility model is that the purification and utilization of flue gas from garbage incineration plants not only meets the requirements of environmental protection, but also promotes the full utilization of resources, plays a positive role in environmental protection and improving air quality, and also has an important impact on human life and health.

Description

Refuse incineration flue gas purification device

technical field

The utility model relates to a garbage incineration flue gas purification device.

Background technique

和水混合来净化酸性气体但由于长时间使用Ca(OH)会导致喷淋口被堵，需花费大量时间和经济去维修导致很多焚烧厂不采用这种方法，而若将污水沉淀后排放，虽然解决了污水问题，但是将沉淀物作为垃圾处理，在某种程度上（沉淀物还有重金属）也会造成二次污染，基于上述原因，目前垃圾焚烧厂焚烧炉的烟气基本只进行简单处理就直接排放，这给焚烧厂周围的空气环境造成了很大污染，只能向偏远地区搬迁场址来解决问题，而且由于不进行烟气处理，导致焚烧炉工作场所的工作环境比较恶劣。  Existing waste incineration plants generally use incinerators for waste incineration. The incinerators will produce a large amount of smoke and dust when they are working. Dust removal technology, such as bag dust removal method and spray dust removal method, but because there are a lot of chlorides in the incinerators of waste incineration plants, which are the main source of acid gases and dioxins, the existing flue gas purification technology And can reduce these harmful gases to national standards; the reason is that most incineration plants now simply use bag filter dust collectors for dust removal, which cannot effectively eliminate the content of acid gases and dioxins, even if some incineration plants Use spray to purify flue gas, but because most of them use Ca(OH)

Mixed with water to purify acid gas but due to long time use of Ca(OH) It will cause the spray outlet to be blocked, and it will take a lot of time and money to repair, so many incineration plants do not use this method. If the sewage is discharged after sedimentation, although the sewage problem is solved, the sediment is treated as garbage. To a certain extent (sediments and heavy metals) will also cause secondary pollution. Based on the above reasons, the flue gas from the incinerator of the waste incineration plant is basically discharged directly after simple treatment, which has caused a lot of damage to the air environment around the incineration plant. Heavy pollution can only be solved by relocating the site to remote areas, and because the flue gas is not treated, the working environment of the incinerator workplace is relatively poor.

Utility model content

The purpose of this utility model is to provide a kind of garbage that can completely treat the flue gas and dust particles in the flue gas to meet the national standard, and can recycle the flue gas generated by the incinerator through the steam turbine to generate electricity, and simultaneously process and purify the flue gas Incineration flue gas purification device. the

The technical solution adopted by the utility model to solve its technical problems is:

The waste incineration flue gas purification device, including the incineration boiler, is characterized in that it also includes:

A bag filter, the bag filter is connected with the waste gas discharge pipeline of the incineration boiler, and is used to remove most of the dust in the flue gas;

A water spray flue gas treatment tower, the water spray flue gas treatment tower is connected with the exhaust pipe of the bag filter, and is used to remove dust particles and harmful gases of the flue gas;

An induced draft fan, the induced draft fan is arranged on the connecting pipe between the water spray flue gas treatment tower and the bag filter, and is used to introduce flue gas into the water spray flue gas treatment tower;

A cyclone dehydrator, the cyclone dehydrator is connected with the exhaust pipe of the water spray flue gas treatment tower, and the purified flue gas is connected to the cyclone dehydrator after dehydration and dust removal by the cyclone dehydrator 4 exhaust through the chimney.

On the basis of the above-mentioned main technical solutions, the following further improved technical solutions can be added:

It also includes a waste heat boiler, the waste heat boiler is arranged between the bag filter and the incineration boiler, and is respectively connected to the two devices through pipes, and a steam turbine is connected to the waste heat boiler, and the steam turbine is connected to a generator. The waste heat boiler uses flue gas to generate steam, drives a steam turbine, and the steam turbine drives a generator to generate electricity.

It also includes a settling device, which is respectively connected with the water spray flue gas treatment tower and the cyclone dehydrator through pipelines, and is used for settling and purifying the sewage generated by the two devices.

It also includes a storage pool, the storage pool is respectively connected with the settling device and the incineration boiler through pipelines, used to store the sediment produced by the settling device and the residue incinerated by the incineration boiler, and on the pipeline connected with the settling device There is also a valve.

The settling device communicates with the water tank of the water spray flue gas treatment tower through a pipeline, and a water pump is also provided on the pipeline for transporting the settled and purified water in the settling device to the water spray flue gas treatment tower. in the tank.

The beneficial effects of the utility model are as follows: 1. The purification and utilization of flue gas from waste incineration plants not only meet the requirements of environmental protection, but also promote the full utilization of resources, play a positive role in environmental protection and improve air quality, and benefit human beings. It also has an important impact on life and health;

2. By using the principle of wet dust removal to design the water spray flue gas treatment tower, using water and bleaching powder to mix to remove dust particles and acid gases in the dusty gas, this method has low energy consumption, simple structure, and low one-time investment. The floor area is small, and it can play the role of both dust removal and toxic gas purification.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Description of drawings:

Fig. 1 is the front view of the utility model.

Detailed ways

As shown in Figure 1, the waste incineration flue gas purification device of the present utility model includes an incineration boiler 12 for waste incineration;

A waste heat boiler 11, the waste heat boiler 11 is connected to the exhaust gas discharge pipe of the incineration boiler 12, and a steam turbine 10 is connected to the waste heat boiler 11, and the steam turbine 10 is connected to a generator, and the waste heat boiler 11 uses flue gas to generate Steam drives the steam turbine 10, and the steam turbine drives the generator to generate electricity;

A bag filter 9, the bag filter 9 communicates with the exhaust gas discharge pipeline of the waste heat boiler 11, and is used to remove most of the dust in the flue gas;

A water spray flue gas treatment tower 6, the water spray flue gas treatment tower 6 is connected with the exhaust pipe of the bag filter 9, and is used to remove dust particles and harmful gases of the flue gas;

An induced draft fan 7, said induced draft fan 7 is arranged on the connecting pipe between the water spray flue gas treatment tower 6 and the bag filter 9, for introducing flue gas in the water spray flue gas treatment tower 6;

A cyclone dehydrator 4, the cyclone dehydrator 4 communicates with the exhaust pipeline of the water spray flue gas treatment tower 6, and a pump is also provided on the exhaust pipeline for introducing gas into the cyclone dehydrator 4 , after the purified flue gas is dehydrated and dedusted by the cyclone dehydrator 4, it is discharged from the chimney 5 connected with the cyclone dehydrator 4;

Settling device 8, said settling device 8 is respectively connected with water spray flue gas treatment tower 6 and cyclone dehydrator 4 through pipelines, and is used to settle and purify the sewage produced by the two devices, said settling device 8 communicates with the water tank 3 of the water spray flue gas treatment tower 6 through a pipeline, and a water pump 2 is also provided on the pipeline for transporting the settled and purified water in the settling device 8 into the water spray flue gas treatment tower 6 in the water tank 3;

A storage tank 13, the storage tank 13 is connected with the settling device 8 and the incineration boiler 12 respectively by pipelines, used for storing the sediment produced by the settling device 8 and the residue burned by the incineration boiler 12, and in conjunction with the settling device A valve 1 is also provided on the connected pipeline.

As shown in Figure 1, the connection relationship of each device of the waste incineration flue gas purification device of the present utility model is: the incineration boiler 12 has a smoke exhaust port and a flue that communicates with it, and communicates with the smoke outlet of the flue to form a waste heat boiler 11. The waste heat boiler 11 is connected with a steam turbine 10, and the steam turbine 10 is connected with a generator; the tail gas discharge pipe of the waste heat boiler 11 is connected with the bag filter 9, and the bag filter 9 is connected with the induced draft fan 7 through the pipeline, and the induced draft fan 7 is communicated with the spray treatment tower 6 through pipelines, the outlet of the spray treatment tower 6 is communicated with the settling device 8 through the pipeline, and the sewage outlet of the settling device 8 is connected with the storage pool 13 through the pipeline, and the storage pool 13 It communicates with the incineration boiler 12 through a pipeline. The water spray flue gas treatment tower 6 includes a shell and a spray device inside the shell. The top of the shell of the water spray flue gas treatment tower 6 is provided with an air outlet through the pipeline and The cyclone dehydrator 4 is connected, and the cyclone dehydrator 4 is connected with the chimney 5. The settling device 8 includes a first sedimentation tank 81 and a second sedimentation tank 82. The bottom of the first sedimentation tank 81 passes through a valve 1 The blowdown pipe of the second settling tank 82 communicates with the storage tank 13 through the blowdown pipe with a valve 1 . The outlet of the water spray flue gas treatment tower 6 is communicated with the first sedimentation tank 81 through a pipeline, and the first sedimentation tank 81 and the second sedimentation tank 82 are connected through a water pipe, and the second sedimentation tank 82 is connected in series with The pipeline of the water pump 2 communicates with the water tank 3 of the spray device of the water spray flue gas treatment tower 6, so that the water spray flue gas treatment tower 6, the first sedimentation tank 81, and the second sedimentation tank 82 are connected in series through water pipes to form a Water circulation system, the storage pool 13 of the sewage sedimentation treatment device communicates with the incineration boiler 12 through pipelines, and the sediment discharged after spraying is stored in the storage pool 13 together with the incineration residue, and the solid matter in the storage pool 13 It can be used to manufacture building materials, thereby reducing environmental pollution.

When the waste incineration flue gas purification device of the utility model is working, the flue gas produced by the incineration boiler 12 enters the waste heat boiler 11 through the flue to generate steam, and passes into the steam turbine 10 to drive the generator to generate electricity. The flue gas will become 28% of the original, and then the 28% flue gas will pass through the bag filter 9 to remove most of the dust in the flue gas, and then the flue gas passing through the bag filter 9 will communicate with the induced draft fan 7 and send it to the Water spray flue gas treatment tower 6, the purified flue gas is discharged from the chimney 5 after dehydration and dust removal by the cyclone dehydrator 4, and the sewage generated by the water spray flue gas treatment tower 6 is precipitated by the sedimentation tank and purified water The water pump 2 is sent to the water spray flue gas treatment tower 6 for reuse, and the sediment passing through the two-stage sedimentation tank flows into the storage tank 13 through the sewage pipe, and the sediment in the storage tank 13 is incinerated by the incineration boiler 12 The residues are stored together to be used as building materials. The settling tanks in the above embodiments are two-stage settling tanks connected in series, and of course, three or more settling settling tanks can also be set up.

Claims (5)

1. waste incineration flue gas purifier comprises burning boiler (12), it is characterized in that also comprising:

A sack cleaner (9), described sack cleaner (9) is connected with the exhaust emission pipe of burning boiler, is used for removing most of dust of flue gas;

A water spray flue gas treating column (6), described water spray flue gas treating column (6) is connected with the discharge duct of sack cleaner (9), is used to remove the grit and the pernicious gas of flue gas;

An air-introduced machine (7), described air-introduced machine (7) are arranged on being connected on the pipeline of water spray flue gas treating column (6) and sack cleaner (9), are used for that flue gas is introduced water and spray flue gas treating column (6);

An eddy flow dehydrator (4); Described eddy flow dehydrator (4) is connected with the discharge duct of water spray flue gas treating column (6); Purify the back flue gas after the dedusting of dewatering through eddy flow dehydrator (4), discharge by the chimney (5) that is connected with eddy flow dehydrator ().

2. waste incineration flue gas purifier according to claim 1; It is characterized in that: also comprise a waste heat boiler (11); Described waste heat boiler (11) is arranged between sack cleaner (9) and the burning boiler (12), and is connected with stream oriented device through pipeline respectively, also connects a steam turbine (10) on the described waste heat boiler (11); Steam turbine (10) links to each other with a generator; Waste heat boiler (11) utilizes flue gas to produce steam, driving steam turbine (10), and by the Steam Turbine Driven generator for electricity generation.

3. waste incineration flue gas purifier according to claim 1 and 2; It is characterized in that: also comprise sedimentation device (8); Described sedimentation device (8) is connected with eddy flow dehydrator (4) with water spray flue gas treating column (6) respectively through pipeline, is used for sewage to the stream oriented device generation and precipitates and purify.

4. waste incineration flue gas purifier according to claim 1; It is characterized in that: also comprise a reservoir (13); Described reservoir (13) is connected with burning boiler (12) with sedimentation device (8) respectively through pipeline; Be used to store the sediment that sedimentation device (8) produces and the residue of burning boiler (12) burning, and with pipeline that sedimentation device (8) is connected on also be provided with valve (1).

5. waste incineration flue gas purifier according to claim 3; It is characterized in that: described sedimentation device (8) is connected through the water tank (3) of a pipeline and water spray flue gas treating column (6), and also is provided with a water pump (2) on the pipeline and is used for carrying entry to spray in the water tank (3) of flue gas treating column (6) sedimentation device (8) deposition and the water that purifies.

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