CN218358429U

CN218358429U - Novel flue gas desulfurization system with reaction vertical pipe

Info

Publication number: CN218358429U
Application number: CN202222101801.XU
Authority: CN
Inventors: 刘昱; 刘爱强; 周鑫龙
Original assignee: Hunan Metallurgical Planning And Design Institute Co ltd
Current assignee: Hunan Metallurgical Planning And Design Institute Co ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2023-01-24
Anticipated expiration: 2032-08-10

Abstract

The utility model relates to the field of flue gas treatment, in particular to a novel flue gas desulfurization system with a reaction vertical pipe, which comprises the reaction vertical pipe connected with a flue, and a dust remover, an induced draft fan and a chimney which are sequentially connected with the reaction vertical pipe; a desulfurizer nozzle is arranged at the flue gas inlet close to the reaction vertical pipe, and the desulfurizer nozzle is connected with a desulfurizer preparation system through a pipeline; the bottom of the reaction vertical pipe is provided with an inverted conical ash bucket, the side wall of the ash bucket is provided with a plurality of blowing pipes along the tangential direction, and the blowing pipes are connected with a nitrogen gas source device; and the ash hopper and the discharger at the bottom of the dust remover are connected with the ash bin through pneumatic conveying devices. The utility model ensures the desulfurization effect by additionally arranging the reaction vertical pipe on the flue, and also reduces the problem that the horizontal flue dust deposition of the traditional structure seriously causes potential safety hazard; meanwhile, the arrangement of the reaction vertical pipe can shorten the traditional longer flue into a small section, so that the occupied area of the pipeline is greatly reduced.

Description

Novel flue gas desulfurization system with reaction vertical pipe

Technical Field

The utility model relates to a flue gas treatment field especially relates to a novel flue gas desulfurization system of area reaction riser.

Background

The coke oven is heated by coal gas, and the flue gas generated by the original combustion is directly discharged through a chimney. Under the condition of meeting the requirements of modern enterprises on production environment and meeting the requirements of the standard of emission Standard of pollutants for coking chemical industry (GB 16171-2012), the flue gas can be subjected to desulfurization, denitrification and dust removal treatment by adopting an SDS dry desulfurization and medium-low temperature SCR denitrification process. In the dry desulfurization, a horizontal pipeline is generally adopted as a pipeline from a desulfurizing agent injection point to an inlet of a dust remover, and in order to reduce dust deposition, the flow rate of flue gas in the horizontal pipeline is higher and ensure the desulfurizing agent and SO in the flue gas ₂ The reaction time is generally longer than the setting length of the horizontal pipeline. Under the condition that the temperature of the flue gas generated by the operation of the coke oven is unstable, the amount of the flue gas is reduced, and the desulfurizing agent and SO in the flue gas ₂ The desulfurized ash produced after the reaction is easy to deposit to the bottom of the horizontal pipeline in a large amount, so that the ash deposition load is increased seriously, the support load is increased, the cleaning and maintenance difficulty is increased, and certain potential safety hazard is caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving among the current desulfurization system the easy deposition of horizontal pipeline and the big problem of area. Therefore, the utility model provides a novel flue gas desulfurization system with a reaction vertical pipe.

The utility model provides a technical scheme that its technical problem adopted is:

the novel flue gas desulfurization system with the reaction vertical pipe comprises the reaction vertical pipe connected with a flue, and a dust remover, an induced draft fan and a chimney which are sequentially connected with the reaction vertical pipe; a desulfurizer nozzle is arranged at the flue gas inlet close to the reaction vertical pipe, and the desulfurizer nozzle is connected with a desulfurizer preparation system through a pipeline; the bottom of the reaction vertical pipe is provided with an inverted conical ash bucket, the side wall of the ash bucket is provided with a plurality of blowing pipes along the tangential direction, and the blowing pipes are connected with a nitrogen gas source device; the ash hopper and the discharger at the bottom of the dust remover are connected with the ash bin through a pneumatic conveying device.

In a preferred embodiment of the novel flue gas desulfurization system with the reaction vertical pipe provided by the present invention, the reaction vertical pipe is internally provided with a guide plate for guiding the flue gas to enter.

In a preferred embodiment of the novel flue gas desulfurization system with the reaction vertical pipe, the guide plate is arc-shaped, and the slope is located in the reaction vertical pipe, and the arc-shaped surface faces the flue gas inlet.

The utility model provides a take novel flue gas desulfurization system of reaction riser in a preferred embodiment, the pipe diameter of reaction riser satisfies the velocity of flow of flue gas in it and is greater than 2 times the suspension velocity of main particulate matter in the flue gas.

In a preferred embodiment of the novel flue gas desulfurization system with the reaction vertical pipe, the ash bucket is further provided with a material level switch and an air cannon.

In a preferred embodiment of the novel flue gas desulfurization system with the reaction vertical pipe, a pneumatic gate valve is further arranged on the discharge pipe of the ash bucket.

The utility model provides a take a preferred embodiment of novel flue gas desulfurization system of reaction riser, still be equipped with the manual service valve of overhauing usefulness on the discharging pipe of ash bucket.

The utility model provides a take a preferred embodiment of novel flue gas desulfurization system of reaction riser, material level switch, air bubble, pneumatic push-pull valve, tripper and pneumatic conveyor equal signal connection PLC controller.

The utility model provides a take novel flue gas desulfurization system of reaction riser in a preferred embodiment, pneumatic conveyor includes roots's fan and the pipeline of connecting roots's fan, the tripper of ash bucket and dust remover bottom is all connected pipeline.

Compared with the prior art, the utility model provides a novel flue gas desulfurization system of area reaction riser's beneficial effect is: the utility model has the advantages that the reaction vertical pipe is arranged on the horizontal flue, the desulfurizing agent reacts on the upper part of the reaction vertical pipe under the lifting of the particle in the flue gas by controlling the flow velocity of the flue gas and the injection pipe, the desulfurizing reaction time is prolonged, the desulfurizing effect is ensured, and the problem that the potential safety hazard is easily caused by serious ash deposition of the horizontal flue in the traditional structure is also reduced; the setting of reaction riser can shorten the horizontal longer flue that sets up of traditional horizontally into a lesson, uses as connecting the reaction riser, the place area occupied of the pipeline that has significantly reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

FIG. 1 is a schematic structural diagram of a novel flue gas desulfurization system with a reaction vertical pipe provided by the present invention;

FIG. 2 is a schematic diagram of the reaction riser provided in FIG. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Example one

The embodiment provides a novel flue gas desulfurization system with a reaction vertical pipe, as shown in fig. 1 and fig. 2, comprising a reaction vertical pipe 2 connected with a flue 1, and a dust remover 3, an induced draft fan (not shown in the figure) and a chimney (not shown in the figure) which are sequentially connected with the reaction vertical pipe 2.

A desulfurizer nozzle 4 is arranged at the flue gas inlet of the flue 1 close to the reaction vertical pipe 2, the desulfurizer nozzle 4 is connected with a desulfurizer preparation system (not shown in the figure) through a pipeline, a desulfurizer is supplied into the flue by the desulfurizer preparation system, and the desulfurizer is sprayed into the flue by the desulfurizer nozzle and enters the reaction vertical pipe along with the flue gas. In this embodiment, a plurality of desulfurizer nozzles are provided in the flue.

The bottom of the reaction vertical pipe 2 is provided with an inverted cone-shaped ash bucket 201, large granular substances in the flue gas are reacted with a desulfurizer and then are deposited in the ash bucket by gravity, the flue gas containing dust is pretreated before entering a dust remover, the load of the dust remover is reduced, the side wall of the ash bucket 201 is provided with a plurality of injection pipes 5 along the tangential direction, and the injection pipes 5 are connected with a nitrogen gas source device (not shown in the figure). In the embodiment, spirally-rising nitrogen is sprayed upwards into the reaction vertical pipe through the spraying pipe, and the flow velocity of the nitrogen is controlled, so that the desulfurizing agent and the flue gas (main particles) react at the middle upper part of the reaction vertical pipe.

The ash hopper 201 and the discharger 6 at the bottom of the dust remover 3 are connected with the ash bin 8 through the pneumatic conveying device 7, and the desulfurized ash in the reaction vertical pipe and the dust remover is conveyed to the ash bin for storage.

Preferably, as shown in fig. 2, a baffle plate 9 is arranged in the reaction vertical pipe 2 facing the flue gas inlet; specifically, this embodiment the guide plate 9 is arc, and the slope is located in the reaction riser 2, and its arcwall face orientation the flue gas inlet. The guide plate guides flue gas in the horizontal flue to the vertical direction, so that the influence on the service life of the reaction vertical pipe caused by the scouring of particles in the flue gas on the reaction vertical pipe is prevented, and the flue gas flow can uniformly enter the reaction vertical pipe from the horizontal flue.

Preferably, the pipe diameter of the reaction vertical pipe 2 in this embodiment satisfies that the flow velocity of the flue gas therein is greater than 2 times of the suspension velocity of the main particulate matters in the flue gas. The main particles are particles with other particle sizes except for larger particles; after desulfurization, large particulate matters are deposited in the ash hopper by gravity (the rotating and rising nitrogen can prolong the reaction time of the large particulate matters), and small particulate matters enter the dust remover after mainly reacting at the middle upper part of the reaction vertical pipe. The pipe diameter selection principle of the reaction vertical pipe in the implementation is as follows: the flow in the flue gas is certain, and the velocity of flow is controlled, and when the velocity of flow control is a definite value, the velocity of flow of flue gas in it is decided to the size of reaction riser pipe diameter (because the volume of nitrogen gas is less, neglects the velocity of flow influence of flue gas in the reaction tube).

Preferably, the ash bucket 201 of the present embodiment is further provided with a material level switch 10 and an air cannon 11; a pneumatic gate valve 12 is further arranged on a discharge pipe of the ash bucket 201; the material level switch 10, the air cannon 11, the pneumatic gate valve 12, the discharger 6 and the pneumatic conveying device 7 are all connected with a PLC (programmable logic controller) through electric signals (not shown in the figure). The material level switch is used for detecting the height of ash deposition in the ash hopper, when the ash discharge height is detected, the pneumatic gate valve is opened, the pneumatic and pneumatic conveying device of the discharger is started, and ash discharge is started; after ash is discharged, the material level switch still detects a signal to indicate that the ash bucket is blocked, and the air cannon is started to clear the blockage. The processes are automatically controlled by the PLC, and the automatic ash discharge of the reaction vertical pipe is realized.

Preferably, a manual service valve 13 for service is further disposed on the discharge pipe of the ash bucket 201 of the present embodiment.

Preferably, the pneumatic conveying device 7 of the embodiment comprises a roots blower 701 and a conveying pipeline 702 connected with the roots blower, and the ash hopper 201 and the discharger 6 at the bottom of the dust remover 3 are both connected with the conveying pipeline 702.

The above-mentioned only be the embodiment of the present invention, not consequently the restriction of the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transform made of the content of the specification of the present invention, or directly or indirectly use in other relevant technical fields, all including in the same way the patent protection scope of the present invention.

Claims

1. The utility model provides a novel flue gas desulfurization system of area reaction riser which characterized in that: the device comprises a reaction vertical pipe connected with a flue, and a dust remover, an induced draft fan and a chimney which are sequentially connected with the reaction vertical pipe;

a desulfurizer nozzle is arranged at the flue gas inlet close to the reaction vertical pipe, and the desulfurizer nozzle is connected with a desulfurizer preparation system through a pipeline;

the bottom of the reaction vertical pipe is provided with an inverted conical ash bucket, the side wall of the ash bucket is provided with a plurality of blowing pipes along the tangential direction, and the blowing pipes are connected with a nitrogen gas source device;

and the ash hopper and the discharger at the bottom of the dust remover are connected with the ash bin through pneumatic conveying devices.

2. The novel flue gas desulfurization system with a reaction riser according to claim 1, characterized in that: and a guide plate is arranged in the reaction vertical pipe and is opposite to the flue gas inlet.

3. The novel flue gas desulfurization system with a reaction riser according to claim 2, characterized in that: the guide plate is arc-shaped, is obliquely arranged in the reaction vertical pipe, and the arc-shaped surface of the guide plate faces the flue gas inlet.

4. The novel flue gas desulfurization system with a reaction riser according to claim 1, characterized in that: the pipe diameter of the reaction vertical pipe meets the condition that the flow velocity of flue gas in the reaction vertical pipe is more than 2 times of the suspension velocity of main particles in the flue gas.

5. The novel flue gas desulfurization system with a reaction riser according to claim 1, characterized in that: the ash bucket is also provided with a material level switch and an air cannon.

6. The novel flue gas desulfurization system with a reaction riser according to claim 5, characterized in that: and a pneumatic gate valve is also arranged on the discharge pipe of the ash bucket.

7. The novel flue gas desulfurization system with a reaction riser according to claim 6, characterized in that: and a manual maintenance valve for maintenance is also arranged on the discharge pipe of the ash bucket.

8. The novel flue gas desulfurization system with a reaction riser according to claim 7, characterized in that: the material level switch, the air cannon, the pneumatic gate valve, the unloader and the pneumatic conveying device are all in electric signal connection with the PLC.

9. The novel flue gas desulfurization system with a reaction riser according to claim 8, characterized in that: the pneumatic conveying device comprises a Roots blower and a conveying pipeline connected with the Roots blower, and the ash hopper and the discharger at the bottom of the dust remover are both connected with the conveying pipeline.