CN201344552Y

CN201344552Y - Fume pretreatment device

Info

Publication number: CN201344552Y
Application number: CNU2009201290453U
Authority: CN
Inventors: 吴迅海; 徐明德; 陈德福
Original assignee: Universtar Science and Technology Shenzhen Co Ltd
Current assignee: Universtar Science and Technology Shenzhen Co Ltd
Priority date: 2009-01-05
Filing date: 2009-01-05
Publication date: 2009-11-11
Anticipated expiration: 2019-01-05

Abstract

The utility model discloses a fume pretreatment device, which comprises a heat tracing pipe and a sampling probe. An air compressor is connected to the sampling probe, the sampling probe is connected with a steam trap through the heat tracing pipe, the steam trap is connected with a sampling pump through a first class electronic cryostat and a drying filter; the sampling pump is connected with a grease filter through a second class electronic cryostat and is connected with a nitrogen oxides converter through the grease filter. The device is capable of effective detection on the emission concentration, emission index and emission quantity of the particulate matter and gaseous contaminant in the fume, and compared with the prior art, the utility model has the advantages of excellent corrosion resistance and sealing performance, good water and dust removal effect and easy and convenient maintenance.

Description

Flue Gas Pretreatment Device

Technical field:

The utility model relates to a kind of Flue Gas Pretreatment Device.

Background technology:

At present, domestic fixed-contamination source emission fume continuous monitoring system (CEMS) intends adopting laser transmission method to measure dust concentration; Adopt heat pipe to extract sampling method, flue gas pretreatment system, non-dispersion infrared line absorption method measurement flue gas concentration fully; Comprise SO ₂, NO _X, CO, CO ₂Etc. multiple smoke components; Measure Gas Parameters with Pitot tube, pressure sensor, temperature sensor, humidity sensor, magnetic machinery formula analyzer, with collections such as industrial computer, PLC and deal with data, monitor in real time, generate chart, form, the control system operation can be to the particle in the flue gas, gaseous contaminant (SO ₂, NO _X, CO etc.) concentration of emission, emission index and discharge capacity on-line monitoring and transmit every Monitoring Data and form continuously automatically to environmental administration.

Said system is applicable to that the various boilers of industries such as generating, metallurgy, chemical industry, building materials, kiln discharging flue gas purify except that water treatment, make SO in the sample gas ₂, NO _X, pollutant such as CO obtains effective continuous monitoring, for environmental management person provides valid data, also can be applicable to corollary equipments such as desulfurization monitoring simultaneously.

And extract in the sampling system at heat pipe, the flue gas preconditioning technique not only is related to the correctness of analyzer analysis result, and is related to the operate as normal and the service life of analyzer.According to statistics, directly the fault of extraction-type system occurs in the preprocessing part of flue gas more than 35%, accounts for half of whole system fault.Therefore existing flue gas pretreatment system does not all reach requirement to the purification of the impurity such as particle in the flue gas, has occurred that the CEMS maintenance is big, fault rate is high, problem that can not the continous-stable operation.And the design and make a good flue gas pretreatment system, system is most important to flue gas monitoring.

Summary of the invention:

For addressing the above problem, the purpose of this utility model is to provide a kind of Flue Gas Pretreatment Device, to realize the effective purification to impurity such as particles in the flue gas.

For achieving the above object, the utility model is mainly by the following technical solutions:

A kind of Flue Gas Pretreatment Device, comprise heat tracing pipe and sampling probe, be connected with air compressor on the described sampling probe, described sampling probe is connected with steam trap by heat tracing pipe, and this steam trap is connected with sampling pump by one-level electronic refrigerator, device for drying and filtering; Described sampling pump is connected with the greasy dirt filter through the secondary electrons refrigerator, and is connected with the nitrogen oxide converter by the greasy dirt filter.

Described steam trap, one-level electronic refrigerator and device for drying and filtering are connected with the constant voltage well by peristaltic pump respectively.

Described secondary electrons refrigerator and greasy dirt filter also are connected with needle-valve, with the size of control flue gas flow.

Described greasy dirt filter also is connected with SO ₂And O ₂Analyzer is to carry out the flue gas concentration analysis.

The utility model carries out classified filtering by steam trap, one-level electronic refrigerator, device for drying and filtering, and clean flue gas enters SO respectively to export drying ₂And O ₂Analyzer carries out the flue gas concentration analysis, enters the nitrogen oxide converter and carries out delivering to NO after the catalysis _xAnalyzer carries out flue gas NO _xConcentration analysis.This device can effectively detect concentration of emission, emission index and the discharge capacity of the particle in the flue gas, gaseous contaminant, compared with prior art, the utlity model has decay resistance and good seal performance, dewater, good dedusting effect, safeguard advantages such as simple and convenient.

Description of drawings:

Fig. 1 is a structure principle chart of the present utility model.

Identifier declaration among the figure: heat tracing pipe 1, steam trap 2, one-level electronic refrigerator 3, device for drying and filtering 4, sampling pump 5, secondary electrons refrigerator 6, greasy dirt filter 7, nitrogen oxide converter 8, needle-valve 9, peristaltic pump 10, constant voltage well 11, air compressor 12, sampling probe 13.

The specific embodiment:

Below in conjunction with the drawings and specific embodiments the utility model is described further.

See also shown in Figure 1, the utility model provides a kind of Flue Gas Pretreatment Device, and it mainly is made up of heat tracing pipe 1, steam trap 2, one-level electronic refrigerator 3, device for drying and filtering 4, sampling pump 5, secondary electrons refrigerator 6, greasy dirt filter 7, nitrogen oxide converter 8, needle-valve 9, peristaltic pump 10, constant voltage well 11, air compressor 12, sampling probe 13 etc.Sampling probe 13 is connected with heat tracing pipe 1 with air compressor 12 respectively, carries out the timing blowback under the booster action of air compressor 12, to avoid the blocked situation of the contaminated and heat tracing pipe of sampling probe 13 1.

Described sampling probe 13 is connected with steam trap 2 by heat tracing pipe 1, and steam trap 2 is connected with sampling pump 5 by one-level electronic refrigerator 3, device for drying and filtering 4; And steam trap 2, one-level electronic refrigerator 3, device for drying and filtering 4 also are connected with constant voltage well 11 by a peristaltic pump 10 respectively; Described sampling pump 5 is connected with greasy dirt filter 7 through secondary electrons refrigerator 6, respectively be connected with a needle-valve 9 on secondary electrons refrigerator 6 here and the greasy dirt filter 7, by the size of these needle-valve 9 controlled tobacco curing throughputs, greasy dirt filter 7 then respectively with nitrogen oxide converter 8, SO ₂And O ₂Analyzer connects, and by nitrogen oxide converter 8 flue gas is carried out delivering to NO after the catalysis _xAnalyzer carries out flue gas NO _xConcentration analysis; Pass through SO ₂And O ₂Analyzer carries out the analysis of flue gas concentration.

During this device busy, flue gas enters in the heat tracing pipe 1 by sampling probe 13 under the effect of sampling pump 5, and flue gas heating owing to heat tracing pipe in heat tracing pipe 1 makes flue gas remain on the temperature suitable with stack temperature, has so just guaranteed sample gas reset condition.After entering into steam trap 2, original sample gas runs into gentle the separating of water that cold glass tube makes flue gas owing to hot gas.

Wherein separated water flows in the constant voltage well 11 under the effect of peristaltic pump 10, the flue gas of separated relatively dry then enters in the one-level electronic refrigerator 3, carrying out one-level refrigeration dewaters, water after the refrigeration flows under the effect of peristaltic pump 10 in the constant voltage well 11, is entered in the device for drying and filtering 4 further flue gas dry processing that dewater by the comparison dry flue gas of refrigeration.

Enter sampling pump 5 through the one-level refrigeration dried flue gas that dewaters, under positive pressure, enter in the secondary electrons refrigerator 6, carry out secondary refrigeration and dewater through the flue gas behind the sampling pump 5.Respectively be connected with a needle-valve 9 on secondary electrons refrigerator 6 here and the greasy dirt filter 7, can control the size of flue gas flow by metering pin valve 9, obtained dry gas through the flue gas after the secondary refrigeration, enter in the greasy dirt filter 7, in the venting process of greasy dirt filter 7, the remaining greasy dirt in the flue gas is filtered.By the flue gas behind the greasy dirt filter 7 has been clean dry flue gas, here clean and dry flue gas is divided into two-way by threeway, and one the tunnel directly enters SO ₂And O ₂Analyzer carries out the flue gas concentration analysis; Another road then enters nitrogen oxide converter 8 backs to the NO in the flue gas ₂To NO conversion carrying out catalysis, then be sent to NO through the clean dry gas after the catalysis _xAnalyzer carries out flue gas NO _xConcentration analysis.

More than a kind of Flue Gas Pretreatment Device provided by the utility model is described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.

Claims

1, a kind of Flue Gas Pretreatment Device, comprise heat tracing pipe (1) and sampling probe (13), be connected with air compressor (12) on the described sampling probe (13), it is characterized in that: described sampling probe (13) is connected with steam trap (2) by heat tracing pipe (1), and this steam trap (2) is connected with sampling pump (5) by one-level electronic refrigerator (3), device for drying and filtering (4); Described sampling pump (5) is connected with greasy dirt filter (7) through secondary electrons refrigerator (6), and is connected with nitrogen oxide converter (8) by greasy dirt filter (7).

2, Flue Gas Pretreatment Device according to claim 1 is characterized in that: described steam trap (2), one-level electronic refrigerator (3) and device for drying and filtering (4) are connected with constant voltage well (11) by peristaltic pump (10) respectively.

3, Flue Gas Pretreatment Device according to claim 1 is characterized in that: described secondary electrons refrigerator (6) and greasy dirt filter (7) also are connected with needle-valve (9), with the size of control flue gas flow.

4, Flue Gas Pretreatment Device according to claim 1 is characterized in that: described greasy dirt filter (7) also is connected with SO ₂And O ₂Analyzer is to carry out the flue gas concentration analysis.