CN202237624U - Sintered Metal Filters for High Temperature Flue Gas Composition Analysis - Google Patents

Abstract

A sintered metal filter for high-temperature flue gas component analysis is applied to high-temperature flue gas filtration and dust removal for flue gas component analysis. A tube plate is fixed in the filter shell and divides the inner cavity of the filter shell into a dust-containing gas cavity and a purified gas cavity; a second pressure sensor, a second temperature sensor and a differential pressure sensor are connected to the wall of the filter shell; a sintered metal filter tube is fixed on the tube plate and is arranged in a dust-containing gas cavity of the filter shell; the top of the filter shell gas purification cavity is fixed with an ash blowing pipe and a back-blowing gas storage tank. The effect is as follows: the filter effect is good, and the operation is stable. The sintered metal filter tube has excellent high temperature resistance, small pressure drop, higher filtering precision, uniform pore size distribution and stable filtering performance. The sintered metal filter tube has high mechanical strength, the internal and external pressure difference of the sintered metal filter tube can reach 0.8MPa, and the filter performance is stable after the sintered metal filter tube is back-blown and cleaned by high-pressure gas.

Description

Sintered Metal Filters for High Temperature Flue Gas Composition Analysis

technical field

The utility model relates to a filter for filtering and removing dust from high-temperature flue gas, in particular to a sintered metal filter used for component analysis of high-temperature flue gas. The gas filtered by the filter directly enters a flue gas analyzer.

Background technique

At present, before the high-temperature flue gas enters the flue gas composition analysis system, it needs to be dedusted and cooled. The existing domestic high-temperature dedusting technology has its shortcomings, mainly in the following aspects:

Although the cyclone dust collector is cheap and simple in structure, its dust removal efficiency is low; the electrostatic precipitator can purify high-temperature fine dust, but it is difficult to implement for particles that are not easy to be charged, and the investment cost is high; the washing dust collector has a large energy loss. The energy utilization rate is low, accompanied by the generation of new liquid waste; the bag filter is easy to condense, often has the phenomenon of bag sticking, the service life is short, and it is not suitable for high temperature; Vibration during dust blowing often causes the filter tube to break.

Therefore, the above-mentioned dust collector cannot be used in high-temperature flue gas filtration, and the sintered metal filter material has the characteristics of low pressure drop, easy back-blowing regeneration, high strength, heat resistance and corrosion resistance, and has attracted more and more attention. The metal filter tube filter has a compact layout, and the service life of sintered metal is more stable and durable than filter elements of other materials. It is cleaned and regenerated by pulse backflushing, and operates at medium temperature and normal pressure, as long as the pulse valve and controller of the pulse control system The quality is passed and the working condition is stable. Since there are no worn and easily damaged parts, the filtration system can run stably for a long time and requires little maintenance costs. The person in charge of the site can quickly modify the dust removal control system of the injection parameters according to the process needs. The display and recording system of online resistance pressure difference, inlet temperature, injection time, and discharge concentration and other parameters and alarm lines is also simple and easy to control and maintain.

Utility model content

The purpose of this utility model is to provide a sintered metal filter for high-temperature flue gas composition analysis, apply the sintered metal filter element to high-temperature flue gas filtration, and the gas after passing through the filter meets the requirements of the gas composition analyzer. After cooling, it directly enters the flue gas composition analyzer.

The technical scheme adopted by the utility model is: a sintered metal filter for high-temperature flue gas composition analysis, which is mainly composed of a filter housing, a second pressure sensor, a second temperature sensor, a differential pressure sensor, a solenoid valve, and a blowback gas storage It is composed of a tank, a tube plate and a sintered metal filter tube. It is characterized in that: a tube plate is fixed in the filter housing, and the tube plate divides the inner cavity of the filter housing into a dusty gas chamber and a purified gas chamber; An inlet pipe is fixed on the wall of the dusty gas chamber, and a second pressure sensor and a second temperature sensor are connected to the wall of the dusty gas chamber of the filter housing to measure the pressure and pressure in the dusty gas chamber of the filter housing respectively. Temperature; one end of the differential pressure sensor is fixed on the wall of the dusty gas chamber of the filter housing, the other end of the differential pressure sensor is fixed on the wall of the purified gas chamber of the filter housing, and the differential pressure sensor measures the differential pressure between the upper and lower tube plates ; There is a sintered metal filter tube fixed on the tube plate, and the sintered metal filter tube is in the dusty gas chamber of the filter housing; there is an exhaust pipe on the wall of the filter housing to purify the gas; the filter housing purifies the gas A soot blowing pipe is fixed on the top of the chamber, the other end of the soot blowing pipe is connected to the backflush gas storage tank, and a solenoid valve is connected to the soot blowing pipe.

Sintered metal filter tubes can be made of stainless steel 316L, Inconel 601, Hastelloy, and Fe-Cr alloy materials to meet different requirements for strength and temperature resistance.

Briefly describe the working principle of the sintered metal filter for high temperature flue gas composition analysis. See Figure 1. An electric ball valve 1 , a first pressure sensor 2 and a first temperature sensor 3 are connected to the intake pipe, and the high-temperature flue gas enters the dusty gas chamber of the filter housing 4 through the intake pipe. After being filtered by the sintered metal filter tube 15, the high-temperature flue gas enters the purified gas cavity through the tube plate 14. The exhaust pipe is connected with a regulating valve 8, a gas cooler 9, and a flue gas composition analyzer 10. After the filtered high-temperature flue gas is cooled along the exhaust pipe through the cooler 9, it enters the gas composition analyzer 10 for measurement. analyze. The operation in the high-temperature flue gas filter will increase with the prolongation of the use time, and the pressure drop of the sintered metal filter tube 15 will increase. When the pressure difference between the dusty gas chamber and the purified gas chamber reaches a certain value, it will The pulse-controlled solenoid valve 12 is automatically opened under the control of the PLC, and the high-pressure gas (which can be purified air or nitrogen) in the backflush gas storage tank 13 is sprayed out through the soot blowing tube, and the high-pressure gas is blown on the sintered metal. The filter tube 15 is back-blown to remove dust, so as to realize the regeneration of the sintered metal filter tube 15 . Wherein, the backflush gas is traced by the filtered high-temperature gas, and the method adopted is to draw a branch on the exhaust pipe to connect with the heat tracing coil of the backflush gas storage tank 13 . There are flow regulating valves on the inlet and outlet pipes of the filter housing 4, flowmeters are installed on the outlet pipelines, and pressure transmitters, temperature transmitters and differential pressure transmitters are installed on the upper and lower tube plates of the filter housing 4. Monitor running operations at any time.

Beneficial effects of the utility model: the utility model is a sintered metal filter used for high-temperature flue gas component analysis, which has good filtering effect and stable operation. The sintered metal filter tube has excellent high temperature resistance, small pressure drop, high filtration precision, uniform pore size distribution, and stable filtration performance. The sintered metal filter tube has high mechanical strength, the pressure difference inside and outside the sintered metal filter tube can reach 0.8MPa, and its filtration performance is stable after high-pressure gas backflush cleaning. Low cost, compared with other filter materials, sintered metal filter tubes have a long service life and generally do not need to be replaced.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the sintered metal filter used for high-temperature flue gas composition analysis according to the present invention.

In the figure, 1-electric ball valve, 2-first pressure sensor, 3-first temperature sensor, 4-filter housing 4, 5-second pressure sensor, 6-second temperature sensor, 7-differential pressure sensor, 8-regulating valve, 9-gas cooler, 10-flue gas composition analyzer, 11-flow transmitter, 12-solenoid valve, 13-backflush gas storage tank, 14-tube plate, 15-sintered metal filter tube .

Detailed ways

Embodiment 1: Taking a sintered metal filter for component analysis of high-temperature flue gas as an example, the utility model is further described in detail.

See Figure 1. The utility model is used for the sintered metal filter of high-temperature flue gas component analysis, and mainly consists of a filter housing 4, a second pressure sensor 5, a second temperature sensor 6, a differential pressure sensor 7, a solenoid valve 12, and a blowback gas storage tank 13. Composed of tube sheet 14 and sintered metal filter tube 15.

A circular tube plate 14 is fixed in the filter housing 4 , and the tube plate 14 divides the interior of the filter housing 4 into a dust-laden gas chamber and a clean gas chamber. An air inlet pipe is fixed on the wall of the filter housing 4 dusty gas cavity. A second pressure sensor 5 and a second temperature sensor 6 are connected to the wall of the dusty gas chamber of the filter housing 4 to measure the pressure and temperature in the dusty gas chamber of the filter housing 4 respectively. One end of the differential pressure sensor 7 is fixed on the wall of the dust-containing gas chamber of the filter housing 4, and the other end of the differential pressure sensor 7 is fixed on the wall of the purified gas chamber of the filter housing 4. The differential pressure sensor 7 measures the tube plate 14 Differential pressure up and down. Three sintered metal filter tubes 15 are fixed on the tube plate 14 , and the sintered metal filter tubes 15 are in the dust-laden gas cavity of the filter housing 4 . There is an exhaust pipe on the wall of the filter housing 4 purifying gas cavity. Three soot blowing pipes are fixed on the top of the purified gas chamber of the filter housing 4 , and the other ends of the three soot blowing pipes are respectively connected to a backflush gas storage tank 13 , which stores high-pressure air in the backflush gas storage tank 13 . A solenoid valve 12 is connected to each soot blowing pipe.

The sintered metal filter tube 15 is made of Inconel 601 material.

Claims (2)

1. A sintered metal filter for high-temperature flue gas component analysis, mainly composed of a filter housing (4), a second pressure sensor (5), a second temperature sensor (6), a differential pressure sensor (7), Electromagnetic valve (12), blowback gas storage tank (13), tube plate (14) and sintered metal filter tube (15), is characterized in that: a tube plate (14) is fixed in the filter housing (4) ), the tube plate (14) divides the inner cavity of the filter housing (4) into a dusty gas chamber and a purified gas chamber; an air intake pipe is fixed on the wall of the filter housing (4) dusty gas chamber, A second pressure sensor (5) and a second temperature sensor (6) are connected to the wall of the dust-containing gas cavity of the filter housing (4); one end of the differential pressure sensor (7) is fixed on the dust-containing filter housing (4). On the wall of the gas cavity, the other end of the differential pressure sensor (7) is fixed on the wall of the filter housing (4) to purify the gas cavity, and the differential pressure sensor (7) measures the differential pressure above and below the tube sheet (14); A sintered metal filter tube (15) is fixed on the plate (14), and the sintered metal filter tube (15) is in the dusty gas cavity of the filter housing (4); on the wall of the filter housing (4) purifying gas cavity There is an exhaust pipe; a soot blowing pipe is fixed on the top of the purified gas chamber of the filter housing (4), and the other end of the soot blowing pipe is connected to the backflushing gas storage tank (13), and a solenoid valve ( 12). 2. The sintered metal filter for high-temperature flue gas composition analysis according to claim 1, characterized in that: the sintered metal filter tube (15) is made of stainless steel 316L, Inconel 601, Hastelloy or Fe-Cr alloy material production.

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