CN203216763U - Novel fly ash isothermal sampling device - Google Patents

Abstract

The utility model discloses a novel fly ash isothermal sampling device. The novel fly ash isothermal sampling device comprises a heating box arranged on the furnace wall, wherein a sampler is placed in the heating box, the air inlet of the heating box is positioned in a flue, the air outlet of the heating box is connected with an air pump through a dust remover, an ash discharge pipe is installed at the bottom of the heating box and opened and closed through a valve II, the flue gas inlet of the sampler is positioned in the flue and faces an air flow direction, the air outlet of the sampler is connected with the dust remover through a flow meter and a valve I, and a heat preservation box is installed outside the heating box. The novel fly ash isothermal sampling device can be used for accurately reflecting the content of pollutants such as heavy metal in fly ash at a sampling point and ensuring the accuracy and representativeness of sampling for the fly ash in the flue, and has the advantages of energy conservation and environmental protection, compact structure, easiness in operation and the like.

Description

A kind of novel flying dust isothermal sampler

Technical field

The utility model relates to the pick-up unit of boiler and incinerator, especially the flying dust isothermal sampler in boiler and incinerator combustion system and the dust pelletizing system.

Background technology

Contain pollutants such as part heavy metal in the burned-coal fly ash, but the pollutant loads such as fly-ash heavy metal that produce in rubbish, mud or other solid waste burning processing procedures are higher, merit attention equally.Coal and solid useless in contained heavy metal and compound thereof in burning or burning process, can be evaporated and enter flue gas, flue gas enters the process that the back-end ductwork of boiler or incinerator cools from the burner hearth of temperature higher (800 ℃～1100 ℃), heavy metal forms discrete metallic particles gasoloid or on the fly ash granule surface even coring and heteropical deposit effect takes place in the flue gas, thereby is concentrated.Similar with it, bioxin also be in back-end ductwork by the synthetic gentle phase precursor of secondary, low-temperature catalyzed reactive deposition is to the flying dust.Thereby temperature is the key factor of pollutant flying dust enrichment.So, obtain the flying dust sample exactly and measure wherein enriching pollutants situation, obtain temperature to the influence of the aggregation extent of pollutant in the flying dust and leaching toxicity, can be reduction pollutant enrichment design measure on flying dust reference is provided.

At present, the boiler fly ash sampler places outside the flue mostly.Typical external fly ash sampling device is as " constant-speed sampling device of fly ash " (patent publication No.: CN101813579A), after flue gas is introduced cyclone separator, flue gas produces strong rotation, utilizes rotation to make ash-laden gas produce centrifugal force, and fly ash granule is separated from air-flow.This sampler is placed in the flue outside, many (especially the getting the flying dust sample in high temperature section) that the relative flue-gas temperature of sampler temperature is low, cause that flue-gas temperature constantly reduces in whole sampling process, pollutants such as gaseous state heavy metal are condensed on the flying dust, increase pollutant load in the flying dust, be difficult to truly reflect pollutant load in the sampling spot flying dust, the sampling effect is bad.

The utility model content

Goal of the invention: the purpose of this utility model is in order to overcome the deficiencies in the prior art, provides that pollutant such as heavy metal condensation does not take place, the novel flying dust isothermal sampler that sampler is easy to operate in a kind of sampling process.

Technical scheme: to achieve these goals, the utility model has adopted following technical scheme:

A kind of novel flying dust isothermal sampler, it comprises the heating cabinet that is arranged on the place, furnace wall, is placed with sampler in the heating cabinet; The air intake opening of heating cabinet is positioned at flue, and the gas outlet of heating cabinet is connected with air pump through fly-ash separator, and the bottom of heating cabinet is equipped with ash releasing tube, and realizes switch by No. two valves; The smoke inlet of sampler is positioned at flue, and in face of airflow direction, the sampler gas outlet links to each other with fly-ash separator through flowmeter, a valve; Heating cabinet is equipped with insulation can outward.

The sampler outside is equipped with finned tube, is used for augmentation of heat transfer, and wherein insulation can is close to the furnace wall installation, reduces the flue gas thermal loss effectively.

Beneficial effect: the utility model is according to the enrichment mechanism of pollutants such as heavy metal in flying dust, proposed first to realize the isothermal sampling by flue gas heating sampler, avoid that the pollutants such as heavy metal of gas phase condense on the flying dust in the flue gas, thereby reflect the pollutant loads such as heavy metal in the sampling spot flying dust exactly; Guarantee accuracy and the representativeness of fume duct fly ash sampling, had energy-conserving and environment-protective, compact conformation, simple operation and other advantages.

Description of drawings

Accompanying drawing 1 is structural representation of the present utility model.

Embodiment:

Below in conjunction with accompanying drawing the utility model is done further explanation.

As shown in Figure 1, novel flying dust isothermal sampler of the present utility model, it comprises heating cabinet 5, the air intake opening of heating cabinet 5 passes furnace wall 6 and places in the flue, heating cabinet 5 gas outlets link to each other with air pump 1 behind fly-ash separator 2, the bottom of heating cabinet 5 is equipped with ash releasing tube 9, and ash releasing tube 9 is provided with valve 8 No. two, and realizes switch by No. two valves 8.Be provided with sampler 10 in the heating cabinet 5, the smoke inlet 7 of sampler 10 passes walling of flue 6, and places in the flue, and smoke inlet 7 is in face of the flow of flue gas direction; The exhanst gas outlet of sampler 10 links to each other with fly-ash separator 2 through flowmeter 4, a valve 3, and sampler 10 belows also are provided with the outlet of discharging sampling ash particle thing.The heating cabinet 5 outer insulation cans 12 that are equipped with, insulation can 12 is close to furnace wall 6 and is installed.Air pump 1 extracts flue gas heating sampler 10 in the flue, makes that the flue-gas temperature in the flue is consistent with the temperature maintenance of sampler 10; Some finned tubes 11, augmentation of heat transfer are installed in the outside of sampler 10.Whole Unit Installation position is flexible, and is simple and reasonable, easy to operate.

When the utility model device is installed, at first will be according to the needs of test, offer the hole of appropriate size in the flue furnace wall 6 at Fly ash sampling point place, go into freely coming in and going out of flue gas mouth 7, heating cabinet 5 air intake openings with what make things convenient for sampler 10, sampler 10 and heating cabinet 5 are installed and fixed, and repair flue furnace wall 6, be close to wall and install and fix insulation can 12.

During use, close a valve 3 and No. two valves 8, open air pump 1 and extract flue gas heating sampler 10, because temperature still is lower than the sampling spot temperature in the sampling sampler in early stage, have pollutants such as part heavy metal and be condensate on the flying dust, after a period of time, open valve 3 No. one, regulate flowmeter 4 isokinetic samplings according to the local flue gas flow rate of sampling spot, determine sample time by sampling amount; After reaching sample time, from sampler 10, take out the flying dust sample earlier, close air pump 1 again, cut off the electricity supply; Open No. two valves 8 and remove insulation can 12 interior ash particles etc.The utility model utilizes the flue gas heating sampler 10 in the flue, guaranteed that like this temperature is consistent with the temperature of sampler 10 in the flue, at heating cabinet 5 external finned tubes 11 of sampler 10, strengthened endotherm area simultaneously, the heating cabinet 5 outer insulation cans 12 that also are provided with keep temperature constant; Reach the purpose of isothermal sampling by the way, prevent in the sampling process pollutant generation condensations such as heavy metal.

The above only is preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (3)

1. novel flying dust isothermal sampler is characterized in that: it comprises and is arranged on the heating cabinet of locating furnace wall (6) (5), is placed with sampler (10) in the heating cabinet (5); The air intake opening of heating cabinet (5) is positioned at flue, and the gas outlet of heating cabinet (5) is connected with air pump (1) through fly-ash separator (2), and the bottom of heating cabinet (5) is equipped with ash releasing tube (9), and realizes switch by No. two valves (8); The smoke inlet (7) of sampler (10) is positioned at flue, and in face of airflow direction, sampler (10) gas outlet links to each other with fly-ash separator (2) through flowmeter (4), a valve (3); The outer insulation can (12) that is equipped with of heating cabinet (5).

2. novel flying dust isothermal sampler according to claim 1 is characterized in that: at sampler (10) outside surface finned tube (11) is installed.

3. novel flying dust isothermal sampler according to claim 1, it is characterized in that: insulation can (12) is fixed on the furnace wall (6).