CN1419950A

CN1419950A - Slag removal tank

Info

Publication number: CN1419950A
Application number: CN 01130427
Authority: CN
Inventors: 陈鸣楼
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-15
Filing date: 2001-11-15
Publication date: 2003-05-28

Abstract

A dregs removing box arranged before draught fan is used in wet (or day) flue gas desulfurizing-dusting system for further separating or intercepting the dust particles and water vapour from the flue gas stream, making the draught for clean. Its advantages are low cost, and less loss of working pressure (50-130 Pa).

Description

Slag removal tank

This equipment belongs to environmental protection equipment.Be specifically a kind of be applied to be arranged at air-introduced machine in the wet process of FGD dust pelletizing system before, liquid equipment is taken off in the dedusting behind the desulfurization and dedusting tower body.

At present, the design of domestic wet process of FGD dust pelletizing system, make the regulation mostly follow " the Environment Protect in China product is assert technical conditions ", its main part is many by Venturi tube with catch and drip a separator and form, and is perhaps combined by the major-minor double tower; Its flue gas directly causes smoke stack emission from exhaust opening via air-introduced machine after handling through the desulfurization dust-removal system of this combination.

Above-mentioned this wet process of FGD dust removal process mode all runs into a thorny difficult problem always inevitably, promptly at the liquid-gas ratio of system greater than 0.5L/m ³Situation under; When perhaps the outlet flue flue gas flow rate is greater than 12m/s; And main equipment often just can cause the generation of bad phenomenon such as the sticking ash of air-introduced machine carrying liqs and draught fan impeller in dedusting and take off and fail aspect the liquid thoroughly to handle.Meanwhile, do not reach the expectation effect of design, cause and administer the very difficult qualified discharge of realizing of flue gas along with boiler combustion worker shape load variations causes whole system.

In order to solve this realistic problem, we are in conjunction with the actual conditions that current atmospheric environment is administered, and have developed treatment facility---the slag removal tank of holding back problems such as imperfection at wet process of FGD dust pelletizing system air-introduced machine band liquid and the sticking ash of impeller and smoke catching specially.

Below, technical scheme and the embodiment of realizing this invention are described in conjunction with the accompanying drawings.

Fig. 1 is the wet flue gas desulfurization and dedusting equipment main body view of the embodiment of the invention.Reference numeral 1 is a slag removal tank; 2 is Venturi tube; 3 for catching a separator (drop catcher).

Fig. 2 is the longitudinal section schematic diagram of slag removal tank 1 among Fig. 1.

Fig. 3, Fig. 4, Fig. 5 are respectively the front view, lateral plan (be among Fig. 1 M to view) of slag removal tank 1 among Fig. 1 and vertical view (be among Fig. 1 N to view).

This invention is such using, flue gas the drawing at air-introduced machine of boiler (or other industrial furnace) Power traction is lower, enters the wet method sulphur removing and dust removing equipment from the mouth that advances of Venturi tube 2. In Venturi tube 2 In, the flue gas of dust-laden and sulfur dioxide produces action of turbulent flow at diffuser, gas-liquid by the cascade backstage of throat Mutually collide and fully mixing. Droplet captures little grit and forms grey drop, follows simultaneously SO₂Reaction wash Wash process. The gas-liquid mixed smoke gas flow that this turbulent flow forms causes by force under the effect of pulling force, according to inertia at air-introduced machine Tangentially enter drop catcher 3. In drop catcher 3, smoke gas flow drips with catching at (centrifugal) inner bag post 5 4 spirals of tube rise, grey water droplet and absorption SO₂The sediment that reaction generates is in the effect of gravity and centrifugal force Lower, quilt is thrown to is settled down to the water seal discharge after outer side tube-wall chance overflow launder moisture film is trapped capture together. And through one The flue gas of deciding after desulfurization and dedusting is processed is done the final step processing by lower in the inner bag post in slag removal tank 1. At this In, slag removal tank 1 will further be held back to flue gas the purified treatment of drop and dust. Finally, flue gas will from Here cause chimney by air-introduced machine and realize qualified discharge.

Shown in above explanation and accompanying drawing, we are not difficult to find out that this invention mainly is to utilize dust and drop Different from the density of gas, and make them lean on the gravity of self and airflow direction power to produce the angle that flows to, and Drop or dust thrown to dam to be trapped between (staying) plate 10 folder cracks settle down, thereby reach further Separate or hold back the purpose that dust-laden contains powder dust particle and aqueous vapor in the liquid smoke air-flow.

From the embodiment of the invention illustrated in figures 1 and 2 as can be seen, slag removal tank 1 of the present invention has taken into full account the reasonable utilization in place and giving full play to of comprehensive function in design.Its inner bag post that advances mouth and drop catcher 35 forms an English alphabet " L " shape.In addition, the flue that advances this section of mouth to slag removal tank 1 is arranged in the steel reinforced concrete clump 6 of drop catcher 3.In the slag removal tank casing, be provided with (staying) plate 10 that dams that a row is parallel to each other.The sheet number of (staying) plate of damming is provided with the slag removal tank total length and changes flexibly, can consider to be provided with 2～20; Two spacings of damming between (staying) plate can suitably change between 30～1500mm according to concrete condition; Its thickness of slab can be considered between 2～200mm under the prerequisite of proof strength; Its plate is wide is advisable between 50～1800mm.At the slag removal tank lower box, be provided with a grey slag runner 8, between its degree of depth 200～3000mm; Its effect is a certain amount of lime-ash of temporary storage.This grey slag runner 8 is arranged in the basis 7 under the ground level.When estimating that grey slag runner will be expired, can outwards carry out simple deashing by clean-out door 9 and handle.Later slag removal tank 1 can come into operation again again.

The big or small key of slag removal tank 1 effect performance be its dimensional parameters design how.According to theoretical research and the summary of experience of practical application repeatedly, we have drawn the conventional design parameter value of slag removal tank, in conjunction with the accompanying drawings 3, accompanying drawing 4, accompanying drawing 5 be described in detail as follows:

① 2φ≤L ₁≤20φ；1.5φ≤L ₂≤10φ

② 2φ≤H ₁≤10φ；H ₂＝H ₁-d-H ₃；3mm≤H ₃≤1000mm

③ 0.8φ≤d≤1.5φ

④ φ≤b≤3φ

⑤ 30°≤α ₁≤90°；45°≤α ₂≤90°

⑥ 30°≤β ₁≤90°；30°≤β ₂≤90°

⑦ 30°≤δ≤90°

⑧ 0.5H ₂≤h≤1.5H ₂

In a word, this invention is not only tightly rapid with main equipment layout on being provided with, and also convenient and easy in installation, has certain novelty and creativeness.In addition, only between 50～130Pa, this point makes this invention not only can be widely used in newly-built smoke gas treatment engineering in its local pressure loss, and especially to its significant role of the settled performance of technology reconstruction project.Moreover this invention know-why is clear complete, the embodiment simple possible, and manufactured materials is cheap and easy to get, and is with a wide range of applications really.

For the present invention, the material of manufacturing is preferably selected granite for use, can certainly be marble, slabstone stone, lime stone or brick mix build by laying bricks or stones, steel reinforced concrete builds, and with metal material weldering system.When making usually, the wall thickness of slag removal tank is designed to 3～500mm and gets final product.

Except Fig. 1 to the structure and range of application shown in Figure 5, the present invention's slag removal tank can also have other malformation and range of application, and does not break away from protection scope of the present invention.For example: the smoke-intake pipe distortion; The orientation of advancing mouth and outlet flue changes and does not establish grey slag runner or (staying) plate etc. that dams all should belong to the present invention.On using, this slag removal tank can also adapt to pure wet flue gas dust pelletizing system certainly fully.

Claims

1, the slag removal tank that the present invention relates to (1) is a kind of dedusting dehydration equipment that is applied in the wet process of FGD dust pelletizing system, it is characterized in that this equipment is arranged at air-introduced machine before, behind the desulfurization and dedusting tower body (equipment).

2, equipment according to claim 1 is characterized in that being that each position design parameter of this slag removal tank is: 1. 2 φ≤L ₁≤ 20 φ, 1.5 φ≤L ₂≤ 10 φ; 2. 2 φ≤H ₁≤ 10 φ, H ₂=H ₁-d-H ₃, 3mm≤H ₃≤ 1000mm; 3. 0.8 φ≤d≤1.5 φ; 4. φ≤b≤3 φ; 5. 30 °≤α ₁≤ 90 °, 45 °≤α ₂≤ 90 °; 6. 30 °≤β ₁≤ 90 °, 30 °≤β ₂≤ 90 ° of 7. 30 °≤δ≤90 °; 8. 0.5H ₂≤ h≤1.5H ₂

3, according to any one described slag removal tank in the claim 1 to 2, it is characterized in that the material of making be granite or marble, slabstone stone, lime stone or brick mix build by laying bricks or stones, steel reinforced concrete builds, and with metal material weldering system.

4,, it is characterized in that range of application is wet process of FGD dust pelletizing system or pure wet method and dry method flue gas dust collecting system according to any one described slag removal tank in the claim 1 to 3.

5,, it is characterized in that its inner bag post that advances mouth and drop catcher (3) 5 forms an English alphabet " L " shape according to any one described slag removal tank in the claim 1 to 3.

6,, it is characterized in that the flue that advances this section of mouth to slag removal tank (1) is arranged in the steel reinforced concrete clump (6) of drop catcher (3) according to any one described slag removal tank in claim 1 to 3 and the claim 5.

7,, it is characterized in that to establish also in its casing and can not establish (staying) plate (10) that dams according to any one described slag removal tank in claim 1 to 3 and the claim 5 to 6; Can establish under the casing also and can not establish grey slag runner (8).