CN218130587U

CN218130587U - Blast furnace gas cooling and heat exchange composite bag type dust removing device

Info

Publication number: CN218130587U
Application number: CN202222376914.0U
Authority: CN
Inventors: 彭子明; 关文强; 张占庄; 牛得果; 蔡成峰
Original assignee: Jiangsu Ruili Environmental Protection Engineering Co ltd
Current assignee: Jiangsu Ruili Environmental Protection Engineering Co ltd
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2022-12-27
Anticipated expiration: 2032-09-07

Abstract

The utility model discloses a compound bag-type dust collector of blast furnace gas cold-heat exchange relates to the environmental protection field, including oval shell and install the two-way pulse blowback device in the shell, the two-way pulse blowback device includes pulse valve, jetting gas package, trip valve, jetting pipe and nozzle, and the jetting gas package is all connected at jetting pipe both ends, sets up the trip valve between jetting gas package and the jetting pipe, sets up the pulse valve on the jetting gas package, and the nozzle is connected to jetting pipe bottom. The utility model discloses the device uses two-way pulse blowback device, and strong shock wave shakes the dust on filter bag surface, and dust removal effect is better, and the shell adopts the multilayer structure form, is the heat exchange medium between the inside and outside shell body, lets in cold water or steam in the dust remover between the shell body through cold/heat source medium pipeline, control valve, carries out the heat exchange with the inside coal gas of dust remover, and heat exchange efficiency is higher. The space between the side surface of the shell of the device and the blowing pipe is small, the space utilization rate in the dust remover is better than that of a cylindrical dust remover, and the blowing effect is better.

Description

Blast furnace gas cooling and heat exchange composite bag type dust removing device

Technical Field

The utility model relates to the field of environmental protection, in particular to a blast furnace gas heat and cold exchange composite bag type dust collector.

Background

The blast furnace gas is a blast furnace ironmaking byproduct, belongs to toxic, dust-containing, positive-pressure, high-temperature and combustible gas, and can be used after being filtered and purified by a plurality of parallel dry bag dust collectors. Because of the characteristics of blast furnace gas, the barrel of the bag-type dust collector needs to have the characteristics of sealing, pressure resistance, temperature resistance and the like. The existing dust remover adopts a cylindrical structure, the blast furnace gas dust remover mainly comprises a dust-containing gas port, a clean gas outlet, an elliptical seal head, a dust remover straight section, a dust remover support, a conical ash bucket and the like, and the structure has the advantages of high pressure resistance, high tightness and the like. However, this structure also presents some technical drawbacks: (1) The injection pipes are arranged at the edge of the circular dust collector box body, the number of filter bags injected by the injection pipes is small, and the space of the dust collector cannot be effectively utilized; (2) The normal use temperature of the bag type dust collector is between 90 ℃ and 260 ℃, but the temperature of blast furnace gas is suddenly high and suddenly low, and when the temperature exceeds 260 ℃, the filter bag in the dust collector can be burnt by high-temperature flue gas, so that the emission exceeds the standard; when the temperature is lower than 90 ℃, water vapor in the flue gas can condense out condensed water and is attached to the surface of the filter bag, and the condensed water and the dust removal ash on the surface of the filter bag are mixed to form slurry, so that the pulse back flushing ash removal is difficult, the air permeability of the filter bag is seriously reduced, and the failure of the bag type dust collector is caused.

The utility model discloses a patent application of publication number CN 208362274U discloses a flexible high-efficient pulse blowback ash removal device of blast furnace gas dust removal, including circular dust remover barrel, pulse blowback air pocket, underpants jetting pipe, differential pressure detection, pressure automatic regulating valve, circular dust remover barrel side sets up a plurality of pulse blowback air pockets, set up pressure automatic regulating valve on the pulse blowback air pocket intake pipeline, the inside top of circular dust remover barrel sets up the lattice board, the lattice board all is provided with differential pressure detection from top to bottom, a plurality of filter bags of putting under the lattice board, the lattice board top sets up the jetting pipe of many areas nozzle, the level is provided with underpants jetting pipe in the circular dust remover barrel, underpants jetting pipe one side communicates with jetting pipe tip, the other end passes through jetting pipe elbow connection pulse blowback air pocket, the utility model discloses guarantee that the filter area of electromagnetic pulse valve jetting is roughly equivalent, but real-time detection dust remover resistance, can be according to the resistance automatic regulation pulse jetting pressure of dust remover, can guarantee that whole dust remover long-term, high-efficient, low resistance, stable operation, pass through the area setting in the device, but jetting intensity reduces, and can not adopt the improvement pulse jetting pipe branching to obtain the improvement, and can not obtain the branching.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compound bag collector of blast furnace gas cold and heat exchange, jetting dust removal effect is better.

The utility model adopts the technical proposal that:

the utility model provides a compound bag-type dust collector of blast furnace gas heat and cold exchange, includes oval shell and installs the two-way pulse blowback device in the shell, two-way pulse blowback device includes pulse valve, jetting gas package, trip valve, jetting pipe and nozzle, the jetting pipe runs through the casing setting, and the jetting gas package is all connected at both ends, sets up the trip valve between jetting gas package and the jetting pipe, sets up the pulse valve on the jetting gas package, and the nozzle is connected to jetting pipe bottom, and the nozzle below corresponds and sets up the filter bag.

Further, the oval shell comprises an oval shell body, an oval inner shell body and an outer protection layer, a heat insulation layer is arranged between the outer protection layer and the oval shell body, and a heat exchange medium cavity is formed between the oval shell body and the oval inner shell body.

Furthermore, a temperature detector is installed at the top of the elliptical shell and connected with the PLC.

Further, the inlet tube is connected at oval shell top, and the outlet pipe is connected to the bottom, and inlet tube, outlet pipe all communicate with heat exchange medium chamber, cold water is connected respectively to the inlet tube and is advanced the pipe, hot water advances the pipe, and cold water advances to set up automatically controlled inlet valve an, automatically controlled inlet valve b on managing, hot water advances to advance to set up respectively, hot water exit tube, cold water exit tube are connected respectively to the outlet pipe, set up automatically controlled outlet valve an, automatically controlled outlet valve b on hot water exit tube, the cold water exit tube respectively.

Furthermore, the PLC is connected with the electric control water inlet valve a, the electric control water inlet valve b, the electric control water outlet valve a and the electric control water outlet valve b through electric wires.

Furthermore, the shells of the elliptic shell on the two sides of the injection pipe are arranged in parallel with the injection pipe, and the injection pipe is close to the inner side wall of the elliptic shell.

Furthermore, the bottom of the elliptical shell is provided with an ash discharge port, the side surface below the elliptical shell is provided with a clean gas inlet, and the top of the elliptical shell is provided with a clean gas outlet.

Compared with the prior art, the utility model, following beneficial effect has:

1. the utility model discloses the device uses two-way pulse blowback device, spouts the filter bag in the twinkling of an eye through the inside high-pressure nitrogen gas of both sides jetting gas bag inside, forms strong shock wave, shakes the dust on filter bag surface, and the dust is discharged through dust remover bottom ash discharge mouth regularly, effectively utilizes the dust remover space, and dust removal effect is better.

2. The utility model discloses device shell adopts multilayer structure form, divide into shell and oval type dust remover shell body in the oval type dust remover, is heat exchange medium between the inside and outside shell body, lets in cold water or steam in the dust remover through cold/heat source medium pipeline, control valve, carries out the heat exchange with the inside coal gas of dust remover in, between the shell body, and heat exchange efficiency is higher, avoids the device to damage.

3. The utility model discloses device casing side is little with the jetting pipe interval, and dust remover space utilization is better than the cylinder dust remover, and the jetting effect is better.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the connection of the present invention in use;

FIG. 3 is a control schematic diagram of the PLC controller and the electric control valve of the present invention;

fig. 4 is a structural diagram of the side wall of the casing of the present invention.

Wherein: 1. an elliptical outer housing; 2. an elliptical inner housing; 3. a heat exchange medium chamber; 4. a heat-insulating layer; 5. a filter bag; 6. a bidirectional pulse back-blowing device; 7. a clean gas outlet; 8. a clean gas inlet; 9. an ash discharge port; 10. a pulse valve; 11. blowing an air bag; 12. a shut-off valve; 13. a blowing pipe and a nozzle; 14. a temperature detector; 15. a PLC controller; 16. an electric control water inlet valve a; 17. an electric control water outlet valve a; 18. a nozzle; 19. an outer protective layer; 20. a water inlet pipe; 21. a water outlet pipe; 22. cold water inlet pipe; 23. a hot water inlet pipe; 24. an electric control water inlet valve b; 25. a hot water outlet pipe; 26. a cold water outlet pipe; 27. and (4) electrically controlling a water outlet valve b.

Detailed Description

As shown in fig. 1-4, a blast furnace gas heat and cold exchange composite bag type dust collector comprises an oval shell and a bidirectional pulse back-blowing device 6 installed in the shell, wherein the bidirectional pulse back-blowing device 6 comprises a pulse valve 10, a blowing air bag 11, a cut-off valve 12, a blowing pipe 13 and a nozzle 18, the blowing pipe 13 penetrates through the shell, the two ends of the blowing air bag 11 are connected with the blowing air bag 11, the cut-off valve 12 is arranged between the blowing air bag 11 and the blowing pipe 13, the pulse valve 10 is arranged on the blowing air bag 11, the bottom of the blowing pipe 13 is connected with the nozzle 18, and a filter bag 5 is correspondingly arranged below the nozzle 18. The casing of oval shell in injection pipe 13 both sides sets up with injection pipe 13 parallel arrangement, and injection pipe 13 is close to with oval shell inside wall, and the casing cross section is close the ellipse, and device casing side is little with injection pipe 13 interval, and space utilization is better than the cylinder dust remover in the dust remover, and the jetting effect is better. The utility model discloses the device uses two-way pulse blowback device 6, spouts filter bag 5 inside through 11 inside high-pressure nitrogen gas of both sides jetting gas bags in the twinkling of an eye, forms strong shock wave, shakes the dust on filter bag surface, and the dust is discharged through dust remover bottom ash discharge mouth regularly, effectively utilizes the dust remover space, and dust removal effect is better.

The elliptical shell comprises an elliptical shell body 1, an elliptical inner shell body 2 and an outer protection layer 19, a heat insulation layer 4 is arranged between the outer protection layer 19 and the elliptical shell body 1, and a heat exchange medium cavity 3 is arranged between the elliptical shell body 1 and the elliptical inner shell body 2. The bottom of the elliptical shell is provided with an ash discharge port 9, the side surface below the elliptical shell is provided with a clean gas inlet 8, and the top of the elliptical shell is provided with a clean gas outlet 7. The shell adopts the multilayer structure form, divide into oval type dust remover inner casing and oval type dust remover shell body, is the heat exchange medium between the inside and outside shell body, lets in cold water or steam through cold/heat source medium pipeline, control valve in the dust remover between the shell body, carries out the heat exchange with the inside coal gas of dust remover, and heat exchange efficiency is higher, avoids the device to damage.

A temperature detector 14 is arranged at the top of the elliptical shell, and the temperature detector 14 is connected with a PLC (programmable logic controller) 15. The PLC 15 is connected with an electric control water inlet valve a16, an electric control water inlet valve b24, an electric control water outlet valve a17 and an electric control water outlet valve b27 through electric wires.

The top of the elliptical shell is connected with a water inlet pipe 20, the bottom of the elliptical shell is connected with a water outlet pipe 21, the water inlet pipe 20 and the water outlet pipe 21 are communicated with a heat exchange medium cavity 3, the water inlet pipe 20 is respectively connected with a cold water inlet pipe 22 and a hot water inlet pipe 23, the cold water inlet pipe 22 and the hot water inlet pipe 23 are respectively provided with an electric control water inlet valve a16 and an electric control water inlet valve b24, the water outlet pipe 21 is respectively connected with a hot water outlet pipe 25 and a cold water outlet pipe 26, and the hot water outlet pipe 25 and the cold water outlet pipe 26 are respectively provided with an electric control water outlet valve a17 and an electric control water outlet valve b27.

When the device is used, the dust-containing gas enters the elliptical dust collector through the dust-containing gas inlet, the gas is blocked on the surface of the filter bag when passing through the filter bag 5 and the bag cage, the dust-containing gas is filtered and purified, the clean gas is discharged through the clean gas outlet, the two-way pulse back-blowing device 6 on the upper parts of the filter bag and the bag cage is started regularly as the dust on the surface of the filter bag is accumulated more, the high-pressure nitrogen in the blowing gas bag 11 is sprayed into the filter bag instantaneously to form shock waves, the dust on the surface of the filter bag is shaken off, and the dust is discharged regularly through the dust discharge port 9 at the bottom of the dust collector. The device automatically controls the switch of a control valve a/b through a temperature detector 14 and a PLC 15 on the upper part of the dust remover: (1) When the temperature detector 14 detects that the temperature of the gas in the dust remover is higher than 260 ℃ (the highest operation temperature which can be borne by the filter bag), the PLC 15 sends an opening instruction to the electric control water inlet valve a16 after receiving the instruction of the temperature detector, a cold water medium enters the space between the inner shell and the outer shell of the dust remover through a cold/heat source medium pipeline to absorb heat and cool the gas in the dust remover, the cold water becomes hot water after absorbing heat and is discharged through the electric control water outlet valve a17, and the operation temperature of the gas is reduced to below 260 ℃; (2) When the temperature detector 14 detects that the temperature of the gas in the dust remover is lower than 90 ℃ (the lowest operation temperature that the filter bag can bear), the PLC 15 sends an opening instruction to the electric control water inlet valve b24 after receiving the instruction of the temperature detector, the steam medium enters the space between the inner shell and the outer shell of the dust remover through the cold/heat source medium pipeline to heat and raise the temperature of the gas in the dust remover, the steam becomes condensed water after releasing heat and is discharged through the electric control water outlet valve b27, and the gas is heated to more than 80 ℃ to operate. An insulating layer 4 and an outer protective layer 19 are added on the outer shell of the dust remover, so that the heat loss of the cold/hot medium of the dust remover can be prevented.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to be included within the scope of the present invention as defined in the appended claims.

Claims

1. The utility model provides a compound bag collector of blast furnace gas cold and heat exchange, includes oval shell and installs the two-way pulse blowback device in the shell, its characterized in that: the bidirectional pulse back blowing device comprises a pulse valve, a blowing air bag, a stop valve, a blowing pipe and a nozzle, wherein the blowing pipe penetrates through the shell, the two ends of the blowing pipe are connected with the blowing air bag, the stop valve is arranged between the blowing air bag and the blowing pipe, the pulse valve is arranged on the blowing air bag, the nozzle is connected to the bottom of the blowing pipe, and a filter bag is correspondingly arranged below the nozzle.

2. The blast furnace gas cooling and heat exchange composite bag type dust collector of claim 1, which is characterized in that: the elliptical shell comprises an elliptical shell body, an elliptical inner shell body and an outer protection layer, a heat insulation layer is arranged between the outer protection layer and the elliptical shell body, and a heat exchange medium cavity is formed between the elliptical shell body and the elliptical inner shell body.

3. The blast furnace gas cooling and heat exchange composite bag type dust collector of claim 1, which is characterized in that: a temperature detector is mounted at the top of the elliptical shell and connected with a PLC.

4. The blast furnace gas cooling and heat exchange composite bag type dust collector of claim 2, which is characterized in that: the inlet tube is connected at oval shell top, and the outlet pipe is connected to the bottom, and inlet tube, outlet pipe all with heat exchange medium chamber UNICOM, cold water is connected respectively to the inlet tube and is advanced the pipe, the hot water advances the pipe, and cold water advances to set up automatically controlled inlet valve an, automatically controlled inlet valve b on managing, hot water advances to advance to set up automatically controlled inlet valve an, automatically controlled inlet valve b respectively, hot water exit tube, cold water exit tube are connected respectively to the outlet pipe, set up automatically controlled outlet valve an, automatically controlled outlet valve b on hot water exit tube, the cold water exit tube respectively.

5. The blast furnace gas cooling and heat exchange composite bag type dust collector of claim 3, which is characterized in that: and the PLC is connected with the electric control water inlet valve a, the electric control water inlet valve b, the electric control water outlet valve a and the electric control water outlet valve b through electric wires.

6. The blast furnace gas cooling and heat exchange composite bag type dust collector of claim 1, which is characterized in that: the casing of the elliptical shell on two sides of the blowing pipe is arranged in parallel with the blowing pipe, and the blowing pipe is close to the inner side wall of the elliptical shell.

7. The blast furnace gas cooling and heat exchange composite bag type dust collector of claim 1, which is characterized in that: the bottom of the oval shell is provided with an ash discharge port, the side surface of the lower part of the oval shell is provided with a clean gas inlet, and the top of the oval shell is provided with a clean gas outlet.