CN214551913U

CN214551913U - Flue gas tar trapping device

Info

Publication number: CN214551913U
Application number: CN202120342394.4U
Authority: CN
Inventors: 朱文杰; 睢辉; 王涛
Original assignee: Shandong Laigang Energy Conservation And Environmental Protection Engineering Co ltd
Current assignee: Shandong Laigang Energy Conservation And Environmental Protection Engineering Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-11-02
Anticipated expiration: 2031-02-05

Abstract

The utility model discloses mainly be applied to environmental protection technical field, in particular to flue gas tar entrapment device, including preceding collection tuber pipe, pulse bag collector and back collection tuber pipe, be equipped with the air-supply line between preceding collection tuber pipe and the pulse bag collector, set up cooling tube bank in the air-supply line, the air-supply line is all run through at the cooling tube bank both ends, the air-supply line lower part is equipped with cold air communicating pipe, cooling tube bank one end intercommunication cold air communicating pipe, the other end directly leads to the atmosphere, cold air communicating pipe intercommunication cooling blower, between preceding collection tuber pipe and the air-supply line, set up the valve respectively between the air outlet of pulse bag collector and the back collection tuber pipe, the ash bucket intercommunication of pulse bag collector spouts grey system. The utility model discloses flue gas cooling before realizing removing dust makes tar droplet condense, realizes the effective entrapment of tar through spouting grey system, bag collector, guarantees follow-up SOx/NOx control system safety and stability operation. The flue gas cooling before dust removal can simultaneously meet the process requirements of subsequent desulfurization.

Description

Flue gas tar trapping device

Technical Field

The utility model relates to a flue gas tar entrapment device mainly is applied to environmental protection technical field.

Background

According to the requirements of national environmental protection standards, the desulfurization and denitrification treatment of the coke oven flue gas is a necessary flue gas treatment measure for each coke oven. However, when the coke oven leaks, tar in the flue gas can be condensed in the subsequent desulfurization and denitrification processes to block equipment and a flue, so that the system resistance is increased, the normal operation of an environment-friendly facility is influenced, and the development of the coke oven flue gas tar trapping device has important significance for the continuous and stable operation of the subsequent desulfurization and denitrification system.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides a flue gas tar entrapment device, can effectively get rid of tar, guarantee SOx/NOx control system's steady operation.

Flue gas tar entrapment device, including preceding collection tuber pipe, pulse bag collector and back collection tuber pipe, be equipped with the air-supply line between preceding collection tuber pipe and the pulse bag collector, set up cooling tube bank in the air-supply line, the air-supply line is all run through at the cooling tube bank both ends, the air-supply line lower part is equipped with cold air communicating pipe, cooling tube bank one end intercommunication cold air communicating pipe, the other end direct-through atmosphere, cold air communicating pipe intercommunication cooling blower, between preceding collection tuber pipe and the air-supply line, set up the valve respectively between the air outlet of pulse bag collector and the back collection tuber pipe, the ash bucket intercommunication dust ejection system of pulse bag collector.

The pulse bag type dust collector is arranged in 3 sets in parallel, each set is in a modular design, an air inlet of each set is communicated with an air inlet pipe, and an air outlet of each set is communicated with a rear integrated air pipe.

The movable dust removing device is arranged in the air inlet pipe, adopts a compressed air blowing mode and is respectively arranged between two adjacent rows of pipe bundles. The movable ash removal device is arranged between the two rows of tube bundles, can simultaneously blow towards the front tube and the rear tube, and regularly cleans the accumulated ash on the outer wall of the tube bundles.

The cooling tube bundle is arranged in the vertical direction. The cooling tube bundle in the air inlet pipe is vertically arranged, the upper part of the cooling tube bundle is communicated with the atmosphere, and the lower part of the cooling tube bundle is connected with a cold air inlet. The cooling air flows inside the tube bundle and the flue gas flows outside the tube bundle. The cooling tube bundle has the effect equivalent to that of an air flow distribution plate, and is beneficial to the uniform distribution of the air flow at the inlet of the pulse bag type dust collector.

The air inlet pipe is respectively provided with a temperature sensor at the front and the back, the temperature sensors are respectively connected with a temperature controller, the temperature controller is interlocked with a frequency converter, and the frequency converter is connected with a cooling fan. The axial flow fan can be selected as the fan, and the frequency conversion control of the axial flow fan can be realized, and the air quantity can be adjusted through a frequency converter or an air door. If meeting special weather such as sleet, can close the push-pull valve, avoid ponding or debris to get into the fan.

The ash spraying system comprises a gate valve, an electric feeder, a centrifugal fan and an ash conveying pipeline, wherein the ash conveying pipeline is positioned at the positive pressure section of the centrifugal fan and conveys the dust removed in the pipeline from the electric feeder to the upstream flue of the front collecting air pipe. The adsorption and adhesion of tar on the fly ash lay a foundation for realizing tar capture. The pneumatic conveying belongs to dilute phase positive pressure conveying.

The valve is an electric butterfly valve.

The lower part of the cold air communicating pipe is provided with a water outlet. The lower part of the cold air inlet is provided with a water outlet, so that accumulated water can be drained in special weather such as rain, snow and the like.

When the device works, the inlet of the front integrated air pipe is connected with the upstream flue, the outlet of the front integrated air pipe is respectively connected with the 3 sleeve air inlet pipes, the air inlet pipe is directly connected with the pulse bag type dust collector, the outlet of the pulse bag type dust collector is respectively connected with the inlet of the rear integrated air pipe, and the outlet of the rear integrated air pipe is connected with the downstream flue. And 6 sets of valves are respectively arranged on the front pipeline of the air inlet pipe and the outlet pipeline of the pulse bag type dust collector and are used for switching the operation of the pulse bag type dust collector to realize off-line maintenance. A cooling tube bundle and a movable ash removal device are arranged in the air inlet pipe, the lower portion of the air inlet pipe is connected with a cold air communicating pipe, and the cold air communicating pipe is connected with a cooling system. The ash spraying system conveys the fly ash to an upstream flue, realizes the adsorption and bonding of tar on the fly ash, lays a foundation for tar trapping, further liquefies the gas tar through forced or natural convection heat transfer cooling through an air inlet pipe, realizes the high-efficient trapping of tar, and avoids the influence of tar on subsequent desulfurization equipment.

The temperature monitoring system comprises temperature sensors, temperature controllers and the like which are arranged in front of and behind the air inlets. The temperature controller is interlocked with the fan frequency converter, the temperature sensor triggers the set condition after transmitting a signal to the temperature controller, and the frequency converter controls the air quantity of the fan by changing the rotating speed of the fan to reduce the temperature of the flue gas to the set condition. The pulse bag type dust collector is arranged on an ash conveying platform, the ash conveying platform is of a concrete structure, the ash buckets (2) at the inlet are connected with a blowing system, other ash bins are conveyed to a dedusting ash storage bin in a pneumatic ash conveying mode, and the dedusting ash is recycled and periodically discharged.

The blowing system conveys the fly ash to the upstream flue of the front air collecting pipe, the fly ash is adsorbed and bonded with tar droplets in the flue gas in the mixing process of the fly ash and the flue gas, the temperature of the flue gas is further reduced through the air inlet, the tar is ensured to be efficiently collected in the pulse bag type dust removal, and the bag pasting phenomenon does not occur. The pulse bag type dust collector is designed according to standard modularization and can be assembled randomly according to working condition requirements, 3 sets of pulse bag type dust collectors are the same with each other and can be used for each other, 2 sets of pulse bag type dust collectors can normally run to meet the design requirements, and 1 set of pulse bag type dust collectors can be overhauled off line in addition, thereby thoroughly removing dust deposits outside the air inlet pipe bundle or replacing a filter bag.

The utility model has the advantages that:

1. the flue gas cooling before dust removal is realized, tar fog drops are condensed, effective trapping of tar is realized through the ash spraying system and the bag type dust collector, and safe and stable operation of a subsequent desulfurization and denitrification system is ensured.

2. The flue gas cooling before dust removal can simultaneously meet the process requirements of subsequent desulfurization.

3. The temperature control system is interlocked with the cooling system to control the forced cooling air quantity, so that the temperature of the desulfurized flue gas is controllable.

Drawings

Fig. 1 is a schematic top view of the present invention.

Fig. 2 is a schematic elevation structure of the present invention.

In the figure: 1. a front air collecting pipe; 2. a valve; 3. an air inlet pipe; 4. cooling the tube bundle; 5. moving the ash removal device; 6. a pulse bag type dust collector; 7. a rear integrated air pipe; 8. a dust spraying system; 9. a cold air communicating pipe; 10. a cooling fan; 11. a temperature controller; 12. an upstream flue; 13. a downstream flue.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

as shown in fig. 1-2, flue gas tar entrapment device, including preceding collection tuber pipe 1, pulse bag collector 6 and back collection tuber pipe 7, be equipped with air-supply line 3 between preceding collection tuber pipe 1 and the pulse bag collector 6, set up cooling tube bank 4 in the air-supply line 3, air-supply line 3 is all run through at cooling tube bank 4 both ends, air-supply line 3 lower part is equipped with cold air communicating pipe 9, cooling tube bank 4 one end intercommunication cold air communicating pipe 9, the direct atmosphere of the other end, cold air communicating pipe 9 intercommunication cooling blower 10, between preceding collection tuber pipe 1 and the air-supply line 3, set up valve 2 respectively between pulse bag collector 6's air outlet and the back collection tuber pipe 7, the ash bucket intercommunication dust spraying system 8 of pulse bag collector 6. The pulse bag type dust collector 6 is provided with 3 sets in parallel, each set is in modular design, the air inlet of each set is communicated with the air inlet pipe 3, and the air outlet is communicated with the rear integrated air pipe 7. A movable ash removal device 5 is arranged in the air inlet pipe 3, and the movable ash removal device 5 is arranged between two adjacent rows of pipe bundles in a compressed air blowing mode. The cooling tube bundle 4 is arranged in a vertical direction. The cooling tube bundle 4 in the air inlet pipe 3 is vertically arranged, the upper part is communicated with the atmosphere, and the lower part is connected with a cold air inlet. The front and the back of the air inlet pipe 3 are respectively provided with a temperature sensor, the temperature sensors are respectively connected with a temperature controller 11, the temperature controller 11 is interlocked with a frequency converter, and the frequency converter is connected with a cooling fan 10. The ash spraying system 8 comprises a gate valve, an electric feeder, a centrifugal fan and an ash conveying pipeline, wherein the ash conveying pipeline is positioned at the positive pressure section of the centrifugal fan and conveys the dust removed in the pipeline by the electric feeder to the upstream flue 12 of the front air collecting pipe 1. The valve 2 is an electric butterfly valve. The lower part of the cold air communicating pipe 9 is provided with a water outlet.

When the device works, the inlet of the front integrated air pipe 1 is connected with the upstream flue 12, the outlet of the front integrated air pipe is respectively connected with the 3 sleeve air inlet pipes 3, the air inlet pipe 3 is directly connected with the pulse bag type dust collector 6, the outlet of the pulse bag type dust collector 6 is respectively connected with the inlet of the rear integrated air pipe 7, and the outlet of the rear integrated air pipe 7 is connected with the downstream flue 13. After the device is installed, an appropriate amount of dust is stored in an air inlet ash bucket of each set of pulse bag type dust collector 6 in advance, and each set of pulse bag type dust collector 6 is sprayed in advance. Before the tar trapping device system operates, the valves 2 on the front and rear pipelines of 2 sets of pulse bag type dust collectors 6 are opened, the other set of pulse bag type dust collectors 6 are standby for standby, and after the system operates, the ash spraying system 8 and the cooling fan 10 are started. The ash spraying system 8 needs to ensure that the ash spraying amount is proper, a part of tar is not adsorbed and bonded with the dedusting ash due to too little ash spraying, the filtering load of a subsequent pulse bag type dust collector is increased due to too much ash spraying, and the spraying amount can be adjusted according to the tar content adsorbed by the circulating dedusting ash. The cooling fan 10 is controlled in a linkage mode through the temperature controller 11 according to actual operation conditions, the temperature of the flue gas is reduced to a proper temperature, and the gas tar is fully liquefied. During the operation of the tar trapping device, the pulse bag type dust collector and the cooling tube bundle 4 are subjected to ash removal treatment regularly according to system setting. After the tar trapping device operates for a period of time, the front valve and the rear valve of the standby pulse bag type dust collector are opened for use, the front valve and the rear valve of 1 set of pulse bag type dust collector in operation are closed for off-line maintenance, and 3 sets of pulse bag type dust collectors are recycled.

Claims

1. A flue gas tar trapping device is characterized in that: the dust collecting device comprises a front collecting air pipe (1), a pulse bag type dust collector (6) and a rear collecting air pipe (7), wherein an air inlet pipe (3) is arranged between the front collecting air pipe (1) and the pulse bag type dust collector (6), a cooling pipe bundle (4) is arranged in the air inlet pipe (3), the two ends of the cooling pipe bundle (4) are all penetrated through the air inlet pipe (3), the lower part of the air inlet pipe (3) is provided with a cold air communicating pipe (9), one end of the cooling pipe bundle (4) is communicated with the cold air communicating pipe (9), the other end of the cooling pipe bundle is directly communicated with the atmosphere, the cold air communicating pipe (9) is communicated with a cooling fan (10), the front collecting air pipe (1) and the air inlet pipe (3), valves (2) are respectively arranged between an air outlet of the pulse bag type dust collector (6) and the rear collecting air pipe (7), and an ash hopper of the pulse bag type dust collector (6) is communicated with an ash spraying system (8).

2. The flue gas tar trap according to claim 1, characterized in that: the pulse bag type dust collector (6) is arranged in 3 sets in parallel, each set is in modular design, the air inlet of each set is communicated with the corresponding air inlet pipe, and the air outlet is communicated with the rear integrated air pipe (7).

3. The flue gas tar trap according to claim 1, characterized in that: a movable ash removal device (5) is arranged in the air inlet pipe (3), and the movable ash removal device (5) adopts a compressed air blowing mode and is respectively arranged between two adjacent rows of pipe bundles.

4. The flue gas tar trap according to claim 1, characterized in that: the cooling tube bundle (4) is arranged in the vertical direction.

5. The flue gas tar trap according to claim 1, characterized in that: the front and the back of the air inlet pipe (3) are respectively provided with a temperature sensor, the temperature sensors are respectively connected with a temperature controller (11), the temperature controller (11) is interlocked with a frequency converter, and the frequency converter is connected with a cooling fan (10).

6. The flue gas tar trap according to claim 1, characterized in that: the ash spraying system (8) comprises a gate valve, an electric feeder, a centrifugal fan and an ash conveying pipeline, wherein the ash conveying pipeline is positioned at the positive pressure section of the centrifugal fan and conveys the fly ash conveyed to the pipeline by the electric feeder into an upstream flue (12) of the front collecting air pipe (1).

7. The flue gas tar trap according to claim 1, characterized in that: the valve (2) is an electric butterfly valve.

8. The flue gas tar trap according to claim 1, characterized in that: the lower part of the cold air communicating pipe (9) is provided with a water outlet.