CN213050089U

CN213050089U - Single-tower double-circulation AFT tower system

Info

Publication number: CN213050089U
Application number: CN202021405818.9U
Authority: CN
Inventors: 李春阳; 刘彦昭; 苏梅丽; 李德超; 袁海龙; 董振宇; 张超; 刘莹
Original assignee: Beijing Guodian Longyuan Environmental Engineering Co Ltd
Current assignee: Guoneng Longyuan Environmental Protection Co Ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2021-04-27
Anticipated expiration: 2030-07-16

Abstract

The utility model discloses a single-tower double-circulation AFT tower system, including the AFT tower, set up factory building, vortex pump, three-way valve, absorption tower and the defroster under the AFT tower, the first valve port of three-way valve is through first pipeline and AFT tower outside liquid outlet of side lower part intercommunication, the second valve port of three-way valve is through second pipeline and vortex pump entry intercommunication, the third valve port of three-way valve is through third pipeline and absorption tower's thick liquid entry intercommunication; the demister is arranged at the upper part of the inner side surface of the absorption tower; and the upper part of the outer side surface of the AFT tower is provided with a water replenishing port. The system can save energy and reduce consumption, each set of system can also save about 3 ten thousand yuan of maintenance cost every year, and the electric quantity is saved by 26640 KW/h. The corrosion of equipment and structures is well solved, and the maintenance workload is reduced. Under the condition of not carrying out large adjustment, the pipeline flow direction has been changed, has saved the swirler, has reduced the risk that the operation personnel climbed and patrol and examine the operation, has improved efficiency, has reduced the cost of reforming transform. And the workload of overhauling and maintaining is reduced.

Description

Single-tower double-circulation AFT tower system

Technical Field

The utility model relates to a desulfurization technical field, especially single-tower dual cycle desulfurization system.

Background

I department AFT tower stands in the AFT oxidation fan room building top of elevation 10 meters, and former AFT tower thick liquid is carried to AFT tower top elevation about 35 meters department swirler through the whirl pump, reduces AFT tower density through the swirler whirl.

The problems existing at the present stage are as follows: firstly, flue gas and steam overflowing from an AFT tower cyclone cause corrosion of steel structures of internal equipment and structures in a small room, and defects of the cyclone equipment are accelerated; secondly, the equipment is difficult to clean hygienically; thirdly, the cyclone small chamber emits 'white smoke' due to the indoor and outdoor temperature difference in winter, and the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a single tower dual cycle AFT tower system will solve the excessive flue gas and the steam that scatters of AFT tower swirler at present stage, causes booth internal plant and structures steel construction to corrode, and the booth emits "white cigarette" phenomenon and the clean difficulty of AFT tower health, the inconvenient technical problem of operation maintenance of operation personnel winter.

In order to realize the aim, the utility model adopts the following technical scheme that the single-tower double-circulation AFT tower system comprises an AFT tower, a factory building, a cyclone pump, a three-way valve, an absorption tower and a demister, wherein the factory building, the cyclone pump, the three-way valve, the absorption tower and the demister are arranged under the AFT tower;

the demister is arranged at the upper part of the inner side surface of the absorption tower;

and the upper part of the outer side surface of the AFT tower is provided with a water replenishing port.

Further, the slurry level in the AFT tower is higher than the slurry level in the absorber tower. That is, there is a liquid level drop between the slurry in the AFT tower and the slurry in the absorber.

Furthermore, the first pipeline, the second pipeline and the third pipeline are respectively provided with a partition valve.

Further, the slurry inlet is disposed above the level of the slurry in the absorption tower.

Further, the demister water outlet and the water replenishing port are communicated through a pipeline (demister flushing water enters the AFT tower through a communicating pipe to replenish water).

Further, the difference between the height of the slurry in the AFT tower and the height of the slurry in the absorption tower is at least 1 m.

Further, the height of the plant is at least 10 meters.

The beneficial effects of the utility model are embodied in:

1, the utility model provides a pair of single tower dual cycle AFT tower system can energy saving and consumption reduction, and every set of system still can save about 3 ten thousand yuan of maintenance cost annually, saves the electric quantity 26640 KW/h. The corrosion of equipment and structures is well solved, and the maintenance workload is reduced.

2, the utility model provides a pair of single-tower dual cycle AFT tower system under the condition that does not carry out big adjustment, has changed the pipeline flow direction, has saved the swirler, has reduced the risk that the operation personnel climbed and patrol and examine the operation, has improved efficiency, has reduced the cost of reforming transform. And the workload of overhauling and maintaining is reduced.

And 3, the overall structure is ingenious in design, the AFT tower slurry automatically flows back to the absorption tower by utilizing the existing equipment and the liquid level difference between the AFT tower and the absorption tower, and the density of the AFT tower is reduced by controlling a demister to wash and dilute the slurry to replace a cyclone. And controlling the flushing and discharging of the newly-added pipeline by using the original cyclone pump inlet pipeline.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The primary objects and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description.

Drawings

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

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of the piping at the three-way valve.

Reference numerals: 1-AFT tower, 2-plant, 3-cyclone pump, 4-three-way valve, 41-first pipeline, 42-second pipeline, 43-third pipeline,

5-absorption tower, 6-demister, 7-water replenishing port and 8-check valve.

Detailed Description

The technical solutions of the present invention are described in detail below by way of examples, which are only exemplary and can be used only for explaining and explaining the technical solutions of the present invention, but not for explaining the limitations of the technical solutions of the present invention.

Flue gas and steam overflowing from a swirler of the AFT tower 1 cause corrosion of steel structures of internal equipment and structures in a booth, and the booth emits 'white smoke' in winter. The equipment of the vortex pump 3 and the cyclone of the dehydration system of the AFT tower 1 is corroded and worn, the sanitation cleaning is difficult, the equipment position is higher, and the operation of operators is inconvenient. In order to energy-conserving transformation, on current mechanical equipment basis, do not increase new main equipment, improve production efficiency through small-scale technical improvement, the utility model provides a single tower dual cycle AFT tower system.

As shown in fig. 1 and 2, specifically, the system comprises an AFT tower 1, a factory building 2 arranged right below the AFT tower 1, a cyclone pump 3, a three-way valve 4, an absorption tower 5 and a demister 6, wherein a first valve port of the three-way valve 4 is communicated with a liquid outlet at the lower part of the outer side surface of the AFT tower 1 through a first pipeline 41, a second valve port of the three-way valve 4 is communicated with an inlet of the cyclone pump 3 through a second pipeline 42, and a third valve port of the three-way valve 4 is communicated with a slurry inlet of the absorption tower 5 through a third pipeline 43; the demister 6 is arranged at the upper part of the inner side surface of the absorption tower 5; and a water replenishing port 7 is formed in the upper part of the outer side surface of the AFT tower 1. The first, second and

third pipes

41, 42 and 43 are provided with shut-off valves 8, respectively. The height of the plant 2 is at least 10 meters.

The water outlet of the demister 6 is communicated with the water replenishing port 7 through a pipeline, namely, demister flushing water enters the AFT tower through a communicating pipe to replenish water.

The slurry level in the AFT tower 1 is higher than the slurry level in the absorber tower 5. That is, the slurry in the AFT tower 1 and the slurry in the absorption tower 5 have a liquid level difference in height. The slurry inlet is disposed above the level of the slurry in the absorption tower 5.

The pipeline is reformed, the liquid level difference between the AFT tower 1 and the absorption tower 5 is utilized, the slurry in the AFT tower 1 automatically flows back to the absorption tower 5, and the demister 6 is controlled to wash and dilute the slurry in the later period so as to reduce the density of the AFT tower 1.

The system modification method comprises the following steps:

step one, adding a three-way pipe in a pipeline behind an inlet valve of a vortex pump 3 of an AFT tower 1, and adding valves on two sides of the three-way pipe.

And step two, opening a hole on the tower wall of the absorption tower 5, opening the hole above the liquid level of the absorption tower 5, welding a reserved short section, and communicating the reserved hole with a back tee joint of the inlet door of the vortex pump 3 by using a pipeline.

And step three, the slurry in the AFT tower 1 automatically flows back to the absorption tower 5 by utilizing the liquid level drop between the AFT tower 1 and the absorption tower 5, and the slurry is washed and diluted by controlling a demister 6 in the later period to replace the cyclone of a cyclone so as to reduce the density of the AFT tower 1.

And step four, the inlet pipeline of the original cyclone pump 3 can be used for controlling the flushing and the discharging of the newly added pipeline.

The pipeline position is selected the utilization of point and 6 sparge waters of defroster, selects the point and places in 3 entrances of AFT tower 1 vortex pump, utilizes original pipeline and valve just, controls opening of pouring tube, washes and discharges. Utilize defroster 6 to wash the moisturizing, avoid additionally increasing the increase that the moisturizing device brought the expense cost.

The utility model provides a solution limestone wet flue gas desulfurization single tower bicirculating AFT tower 1 swirler that transformation scheme is fine overflows scattered flue gas and steam, causes booth internal plant and structures steel construction to corrode, the emergence of whirl equipment defect with higher speed, the difficult problem of equipment health clearance. The transformation scheme solves the problems of equipment corrosion, white smoke emission and the like caused by the overflow and dispersion of the flue gas of the cyclone, ensures the long-term stable operation of the desulfurization AFT dehydration system, saves the equipment maintenance cost and reduces the station service power.

The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be considered by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention.

Claims

1. A single-tower double-cycle AFT tower system is characterized in that: the device comprises an AFT tower (1), a workshop (2) arranged right below the AFT tower (1), a vortex pump (3), a three-way valve (4), an absorption tower (5) and a demister (6), wherein a first valve port of the three-way valve (4) is communicated with a liquid outlet at the lower part of the outer side surface of the AFT tower (1) through a first pipeline (41), a second valve port of the three-way valve (4) is communicated with an inlet of the vortex pump (3) through a second pipeline (42), and a third valve port of the three-way valve (4) is communicated with a slurry inlet of the absorption tower (5) through a third pipeline (43);

the demister (6) is arranged at the upper part of the inner side surface of the absorption tower (5); the upper part of the outer side surface of the AFT tower (1) is provided with a water replenishing port (7).

2. The single column dual cycle AFT column system of claim 1, wherein the slurry level in the AFT column (1) is higher than the slurry level in the absorber column (5).

3. The single-tower double-cycle AFT tower system according to claim 1, wherein the first, second and third pipes (41, 42, 43) are provided with respective shut-off valves (8).

4. The single tower, dual cycle AFT tower system of claim 1, wherein the slurry inlet is disposed above a level of the slurry in the absorber tower (5).

5. The single-tower double-circulation AFT tower system as claimed in claim 1, wherein the water outlet of the demister (6) is communicated with the water replenishing port (7) through a pipeline.

6. The single tower dual cycle AFT tower system of claim 1, wherein the difference in slurry height in the AFT tower (1) and the absorption tower (5) is at least 1 meter.

7. The single tower dual cycle AFT tower system of claim 1, wherein the plant (2) is at least 10 meters in height.