CN210543920U

CN210543920U - Boiler smoke exhaust bridge type bypass fine filtering device

Info

Publication number: CN210543920U
Application number: CN201921133402.3U
Authority: CN
Inventors: 薛军; 陈国忠; 陈国强
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-05-19
Anticipated expiration: 2029-07-18

Abstract

The utility model discloses a boiler smoke exhaust crosses bridge type bypass fine filtration device, including the main exhaust fume pipe of connection between dust remover and chimney, characterized by is in main exhaust fume pipe in set up extraction formula main road flue gas filter screen, and connect in parallel a bridge bypass flue by main exhaust fume pipe, be equipped with auxiliary fan in the bridge bypass flue to and extraction formula bypass filter screen. When the filter screen is loaded on the main exhaust pipe, the design of the gap bridge bypass flue ensures the original exhaust air volume, effectively intercepts harmful substances such as residual trace sulfur dioxide and the like after the main dust remover is equipped, can realize the purpose of replacing the filter screen without stopping the machine, and has the cost greatly lower than the cost for stopping overhauling the main dust removing equipment or adopting other loading fine filtering devices.

Description

Boiler smoke exhaust bridge type bypass fine filtering device

Technical Field

The utility model relates to a boiler purification technology that discharges fume, especially a bridge type bypass essence is strained to boiler exhaust fume.

Background

The environmental protection requirement of thermal power plant boiler exhaust gas is very strict, and various dust removal equipment is mainly configured in the current conventional use, and emission is ensured to meet the standard requirement through various technical means. For example, the patent publication No. CN108731014A discloses a boiler flue gas dust removal system, which comprises a cleaning pool, a dust removal cylinder, a smoke exhaust pipe and a circulating pipe, wherein a horizontal shaft is fixed at the bottom of the dust removal cylinder, a turbine is rotatably connected to the horizontal shaft, and the air outlet of the smoke exhaust pipe is opposite to the concave surface of the turbine blade; a plurality of filter layers are sequentially connected in the dedusting cylinder above the turbine, each filter layer comprises a filter disc and a steel ball, filter holes are formed in the bottom and the top of each filter disc, an elastic piece is fixedly connected between each filter disc and the dedusting cylinder, and a pull rod is hinged between every two adjacent filter discs; the far end of turbine blade is fixed with the magnetic block, and the filter disc bottom is equipped with first magnet and second magnet, and first magnet and second magnet are about filter disc central symmetry, and the magnetic block attracts mutually when being close to with first magnet, and the magnetic block repels mutually when being close to with the second magnet. The device aims to solve the problem that impurities in flue gas are accumulated at the bottom of the filter layer and close to one side of the smoke exhaust pipe, so that the flue gas treatment efficiency is reduced. If a boiler dust collector that patent publication number is CN108499293A provided again, be equipped with clean room and desulfurization room in the casing, clean room left side top is equipped with the air-supply line, the clean room is equipped with two-layer filter screen, the filter screen links to each other with the clean room top, the clean room below sets up the laying dust room, the clean room right side sets up communicating pipe, the desulfurization room bottom sets up the reaction tank, both ends of communicating pipe are connected with clean room export and reaction tank respectively, the desulfurization room right side is equipped with the shower nozzle, the desulfurization room top is equipped with out the tuber pipe. The outer side of the desulfurization chamber is provided with a filter tank, the bottom of the filter tank is connected with a reaction tank through a pipeline, the upper part of the filter tank is connected with a circulating water pump, and the circulating water pump is connected with a spray head. This device is intended to complete the water circulation by means of a filter device and a circulating water pump.

In the practical working condition, the dust removal effect of a plurality of dust removal devices is often reduced after the dust removal devices are used for a long time, particularly the devices which reach the emission limit data are very ineffectual for enterprises, and the loss of the enterprises is large when the enterprises stop production, overhaul and replace large-scale devices.

Disclosure of Invention

The utility model aims at solving the problem and providing a boiler smoke exhaust crosses bridge type bypass essence and strains device, it has the small investment, clears away the obvious characteristics of tail dirt effect.

The technical problem of the utility model is mainly solved by the following technical scheme: the utility model provides a boiler exhaust fume crosses bridge formula bypass fine filtration device, is including connecting the main exhaust fume pipe between dust remover and chimney, characterized by is in main exhaust fume pipe in set up extraction formula main road flue gas filter screen, and connect a bridge bypass flue in parallel by main exhaust fume pipe, be equipped with auxiliary fan in the bridge bypass flue to and extraction formula bypass filter screen.

In the boiler exhaust smoke bridge type bypass fine filtering device, preferably, the main flue gas filter screen is provided with two independent stations in parallel in the main exhaust smoke pipe; the bypass filter screen is provided with two independent stations in parallel in the gap bridge bypass flue.

In the above-mentioned boiler exhaust smoke passes through bridge type bypass fine filtration device, preferably, the main flue gas filter screen is a breathable mesh plate structure made of silk fabric.

In the above-mentioned boiler exhaust smoke bridge type bypass fine filtration device, preferably, the bypass filter screen is a breathable mesh plate structure made of silk fabric.

In the boiler exhaust smoke cross-bridge type bypass fine filtering device, preferably, valves are arranged at the smoke inlet and the smoke outlet of the cross-bridge bypass flue, and the smoke outlet of the cross-bridge bypass flue is positioned in front of the halogen sampling point.

In the foregoing boiler exhaust gas bridge bypass fine filtration device, preferably, a lifting device is arranged above the main exhaust pipe, and a main flue gas filter screen extraction port is arranged at the top of the main exhaust pipe.

In the boiler exhaust smoke bridge bypass fine filtering device, preferably, a movable sealing cover is arranged in cooperation with the extraction opening of the main flue gas filter screen.

In the boiler exhaust smoke bridge-passing bypass fine filtering device, preferably, a bypass filter screen extraction opening is formed in the bottom surface of the bridge-passing bypass flue, and a movable sealing cover is arranged in cooperation with the extraction opening.

In the boiler exhaust smoke passing bridge type bypass fine filtering device, preferably, the silk fabric measuring unit is more than or equal to 6 mm.

In the above-mentioned boiler exhaust gas bridge-type bypass fine filtration device, preferably, both sides of the air-permeable mesh plate structure are provided with isolation plugboard slots.

According to the technical scheme, a research object is positioned on a main smoke exhaust pipeline between a main fan dust remover and a chimney, a main smoke exhaust filter screen which can be flexibly replaced and extracted at any time is arranged in the main smoke exhaust pipeline, a gap bridge bypass flue is connected in parallel beside the main smoke exhaust pipeline, the gap bridge bypass flue is provided with an independent auxiliary fan, and the main smoke exhaust pipeline and the flexibly extracted bypass filter screen are arranged to form a parallel fine filtration system. In the system, the main flue gas filter screen has two stations in the main exhaust pipe, and the bypass filter screen also has two stations in the bridge bypass flue. The main flue gas filter screen is arranged, so that the ventilation resistance of the main flue gas exhaust pipe is increased due to the filter screen, and at the moment, the arrangement of the gap bridge bypass flue not only plays a role in overcoming the defect of the resistance of the main flue gas exhaust pipe, but also is responsible for finely filtering the discharged flue gas. Due to the arrangement of double stations, the filter screens can be replaced in turn without stopping the machine.

Furthermore, the filter screen in the device is made into a breathable screen structure by adopting common low-cost silk fabric, is convenient to replace, can be repeatedly used after being cleaned, and can finally filter various dusts such as sulfur dioxide, dioxin, peroxide and the like except carbon monoxide.

This scheme can also set up the valve at bridge bypass flue advances, goes out the mouth position, and under the condition that the main blower dust remover accords with the emission requirement completely, close bridge bypass flue, or maintain bridge bypass flue.

Still further, for satisfying the on-the-spot operational environment of most thermal power plant's dust removal equipment, set up hoisting accessory above the main exhaust fume pipe, if arrange small-size driving etc. to avoid pure manual work, the extraction mouth of this kind of extraction formula flue gas filter screen is arranged at main exhaust fume pipe top, when not using the filter screen, uses movable closing cap to seal the extraction mouth. The filter screen extraction port of the gap bridge bypass flue is arranged on the bottom surface of the flue and can be directly taken out from the lower part, the operation is convenient, and the extraction port is matched with a movable sealing cover with the same configuration. The upper and lower extraction modes basically do not affect the space of various facilities on site.

In particular, the scheme optimizes the measurement unit of the silk fabric, adopts the air-permeable material with the thickness of more than or equal to 6 mm and finally filters the discharged smoke. And moreover, the structure of the breathable net plate is also provided with isolation inserting plate grooves which are closed when not used, the isolation inserting plates on two sides are inserted into the inserting grooves when the net plate is disassembled and replaced, and then the whole filter screen is taken out, so that the substances adsorbed on the net are prevented from being scattered in a flue in the operation process.

Compared with the prior art, the beneficial effects of utility model are that: when the filter screen is loaded on the main exhaust pipe, the design of the gap bridge bypass flue ensures or slightly increases the original exhaust air volume, effectively intercepts harmful substances such as residual trace sulfur dioxide and the like after the main dust remover is equipped, can realize the purpose of replacing the filter screen without stopping the machine, and has the cost greatly lower than the cost caused by stopping overhauling the main dust removing equipment or adopting other loading fine filtering devices.

Drawings

Fig. 1 is a schematic diagram of an application layout structure of the utility model.

FIG. 2 is a top view of the main exhaust pipe and the bridge bypass flue of FIG. 1.

Fig. 3 is a schematic view of a flue gas filter screen dismounting and mounting manner of the utility model.

Fig. 4 and 5 are schematic structural views of a smoke filter screen of the present invention.

In the figure: 1. the device comprises a dust remover, 2, a main smoke exhaust pipe, 21, a first main flue smoke filter screen, 211, an isolation inserting plate, 212, a grid, 213, an anti-scattering groove, 22, a second main flue smoke filter screen, 3, a bridge bypass flue, 31, a first bridge bypass flue, 32, a second bridge bypass flue, 4, a chimney, 5, a sampling point and 6, a hoisting device.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Referring to fig. 1 to 3, the boiler flue gas passing bridge type bypass fine filtering device of the present embodiment is technically improved on the premise of the original main flue gas exhaust pipe 2 connected between the dust remover 1 and the chimney 4.

Firstly, two extraction type main flue gas filter screens with independent stations, namely a first main flue gas filter screen 21 and a second main flue gas filter screen 22, are arranged in a main smoke exhaust pipe 2, then a gap bridge bypass flue 3 is connected in parallel beside the main smoke exhaust pipe 2, the smoke inlet of the gap bridge bypass flue 3 is positioned in front of the second main flue gas filter screen 22, and the smoke outlet is positioned behind the first main flue gas filter screen 21 and in front of a halogen sampling point 5.

An independent auxiliary fan 31 is arranged in the gap bridge bypass flue 3, the auxiliary fan 31 can be selected as a reference machine, a full-pressure range is selected according to an actual machine type, and a double-independent-station extraction type bypass filter screen, namely a first gap bridge bypass flue 31 and a second gap bridge bypass flue 32 is arranged in front of the auxiliary fan 31.

The specific structure of the filter screen is described below by taking a main flue gas filter screen as an example, and the structure of the bypass filter screen is the same as that of the bypass filter screen. The flue gas filtering net of the main road is a breathable net plate structure made of silk fabric, namely, silk fabric with a measuring unit of 7 mm is laid in a rectangular frame to be used as a net grid 212, as shown in fig. 4 and 5, two sides of the rectangular frame in the thickness direction are respectively provided with an isolation plugboard groove, wherein an upward flanging is arranged at the bottom of the rectangular frame to be used as a scattering prevention groove 213, and the isolation plugboard groove is matched with the isolation plugboard groove to prepare an isolation plugboard 211. Note: the insertion opening part of the isolation inserting plate 211 adopts soft sealing strips which are tightly attached to each other so as to ensure that the insertion opening part is automatically closed when the isolation inserting plate 211 is not inserted.

The extraction type filter screen mode is adopted, generally speaking, the caliber of the main smoke exhaust pipe 2 is larger, the caliber of the bridge bypass flue 3 is smaller, and the weight of the main smoke filter screen is relatively heavier, so that in practical application, a hoisting device 6 such as a small crane is arranged above the main smoke exhaust pipe 2, and therefore, a main smoke filter screen extraction opening is formed in the top surface of the main smoke exhaust pipe 2, and a movable sealing cover matched with the main smoke filter screen extraction opening is prepared. When the lighter bypass filter screen is used, a bypass filter screen extraction opening can be arranged on the bottom surface of the bridge bypass flue 3, and a movable sealing cover is also arranged in cooperation with the extraction opening.

When the sampling device is used, if the indexes of the sampling point 5 meet the emission standard, the first main flue gas filter screen 21 and the second main flue gas filter screen 22 are taken out, the gap bridge bypass flue 3 is closed, and the operation is carried out according to the conventional working flow.

If the sampling point 5 indicates that the micro-ultra emission standard exists, for example, according to the requirement of the highest allowable smoke emission concentration of the thermal power plant boiler built in the third time period, the smoke emission concentration of the thermal power plant boiler in the planned district of the county and the towns above the county is more than or equal to 200mg/m³When in use, the first main flue gas filter screen 21 or the second main flue gas filter screen 22 is installed, the gap bridge bypass flue 3 is opened, one of the first gap bridge bypass flue 31 or the second gap bridge bypass flue 32 is also inserted into the gap bridge bypass flue 3 for fine filtration, and an unused filter screen extraction port is sealed by a movable sealing cover. After a period of use, the filter screen is determined to be replaced according to the discharge value of the sampling point 5, when the filter screen is replaced, the two sub-block isolation inserting plates 211 are inserted into the isolation inserting plate grooves of the filter screen plate, the mesh grid 212 (silk fabric) is clamped in the two sub-block isolation inserting plate grooves, then the whole filter plate is pulled out, and the movable sealing cover is buckled.

Further, in practical application, enterprises can fully utilize two independent stations in the main smoke exhaust pipe 2 and the gap bridge bypass flue, and means such as frequency conversion control of the auxiliary fan 31 and air valve adjustment to obtain one-stage or multi-stage fine filtration according to specific conditions of the enterprises.

The above-mentioned embodiment is to utility model's explanation, not to utility model's injecing, if the gap bridge bypass flue advances, the outlet flue position is equipped with the valve, adopts horizontal extraction formula filter screen mounting means under the on-the-spot space permission condition to and filter screen silk surface fabric measurement unit is less than 6 thumb meters's multilayer use, etc. and any structure etc. to after simply changing utility model all belong to utility model's protection scope.

Claims

1. The utility model provides a boiler smoke exhaust crosses bridge formula bypass fine filtration device, is including connecting main exhaust fume pipe (2) between dust remover (1) and chimney (4), characterized by is in main exhaust fume pipe (2) in set up extraction formula main road flue gas filter screen, and by a bridge bypass flue (3) of connecting in parallel of main exhaust fume pipe (2), be equipped with auxiliary fan (31) in the bridge bypass flue to and extraction formula bypass filter screen.

2. The boiler smoke exhaust bridge type bypass fine filtering device as claimed in claim 1, wherein the main flue gas filtering screen is provided with two independent stations in parallel in the main smoke exhaust pipe (2); the bypass filter screen is provided with two independent stations in parallel in the gap bridge bypass flue (3).

3. The boiler smoke exhaust bridge type bypass fine filtering device as claimed in claim 1, wherein the main flue gas filtering screen is a breathable mesh plate structure made of silk fabric.

4. The boiler smoke exhaust bridge type bypass fine filtering device as claimed in claim 1, wherein the bypass filtering screen is a breathable mesh plate structure made of silk fabric.

5. The boiler smoke-discharging bridge-type bypass fine-filtering device according to the claim 1 or 2 or 3 or 4, characterized in that the smoke inlet and outlet of the bridge-type bypass flue (3) are provided with valves, and the smoke outlet of the bridge-type bypass flue is positioned in front of the chimney sampling point (5).

6. The boiler exhaust smoke bridge type bypass fine filtering device according to claim 1, 2 or 3, wherein a lifting device is arranged above the main exhaust pipe (2), and a main smoke filter screen extraction port is arranged at the top of the main exhaust pipe.

7. The boiler smoke exhaust bridge type bypass fine filtering device as claimed in claim 6, wherein a movable sealing cover is arranged in cooperation with the extraction port of the flue gas filtering screen of the main channel.

8. The boiler smoke exhaust bridge type bypass fine filtering device according to claim 1, 2 or 4, wherein a bypass filter screen extraction opening is arranged on the bottom surface of the bridge bypass flue (3), and a movable sealing cover is arranged in cooperation with the extraction opening.

9. The boiler smoke exhaust bridge type bypass fine filtration device according to claim 3 or 4, wherein the measurement unit of the filter screen silk fabric is more than or equal to 6 mm.

10. The boiler smoke-discharging bridge-type bypass fine-filtering device according to claim 3 or 4, characterized in that two sides of said gas-permeable mesh plate structure are provided with isolating plugboard slots, and an isolating plugboard (211) is provided in cooperation with the isolating plugboard slots.