CN209735240U

CN209735240U - Overflow weir system

Info

Publication number: CN209735240U
Application number: CN201920144126.4U
Authority: CN
Inventors: 汪满清; 胡生杰; 张劲松; 何梅松; 王翔; 刘尚义; 张健涛; 臧轲轲; 陈秋; 王贤
Original assignee: Jinguan Copper Industry Branch of Tongling Nonferrous Metals Group Holding Co Ltd
Current assignee: Jinguan Copper Industry Branch of Tongling Nonferrous Metals Group Holding Co Ltd
Priority date: 2019-01-28
Filing date: 2019-01-28
Publication date: 2019-12-06
Anticipated expiration: 2029-01-28

Abstract

The utility model aims at providing a can reduce overflow weir scale deposit, guarantee the stable overflow weir system of feed liquor volume, including the one-level dynamic wave washing unit that upper and lower reaches were arranged in proper order, gas cooling tower and second grade dynamic wave washing unit, the feed liquor pipe of the overflow weir that the washing liquid of one-level pump in with the one-level washing liquid storage tank of one-level dynamic wave washing unit set up on the one-level washing section of thick bamboo via first pipeline pump sending to one-level dynamic wave washing unit, the feed liquor pipe still links to each other with clean liquid medium pipeline. The dynamic wave washing principle determines that most of high-temperature dust-containing flue gas is cooled and dedusted in the primary dynamic wave washing process, so that the solid content of the primary dynamic wave washing liquid is highest, and therefore a cleaning liquid medium pipeline is additionally arranged on the basis of the original system to be connected with a liquid inlet pipe, and the cleaning liquid medium is used as a liquid inlet source of an overflow weir, so that the scaling speed is fundamentally reduced, and the problem of frequent cleaning is solved.

Description

Overflow weir system

Technical Field

The utility model relates to a dynamic wave scrubber field, in particular to overflow weir system.

Background

The dynamic wave scrubber is an industrial flue gas purifying and washing device, high-temperature flue gas and washing liquid reversely collide at high speed in a reverse spray pipe of the dynamic wave scrubber and fully contact, so that the processes of gas-liquid mass transfer and heat transfer are completed, and the purposes of cooling and dedusting the flue gas are achieved. In order to reduce the cost of equipment, most of domestic kinetic wave scrubber reverse spray pipes are made of non-metallic materials. However, in order to prevent the reverse spraying pipe from being burnt by high-temperature flue gas because the flue gas temperature in industrial production is about 350 ℃, an overflow weir is usually arranged at the top end of the reverse spraying pipe, liquid flows into the reverse spraying pipe through the inner wall of the overflow weir, and then a layer of uniform liquid film is formed on the inner wall of the reverse spraying pipe, so that the high-temperature flue gas is prevented from directly contacting the inner wall of the reverse spraying pipe to play a role in protection.

When the overflow weir is used, solid-phase substances in liquid are easy to precipitate and scale at a liquid inlet pipe, an inner wall and a drain pipe of the overflow weir, so that the drain pipe is blocked and an overflow port scales. Moreover, the scaling of the overflow port of the overflow weir can cause uneven liquid distribution on the inner wall of the overflow weir, which causes the flow cutoff of partial overflow surface, thereby causing the failure of overflow protection. In the actual production process, in order to avoid excessive sediment in the overflow weir from influencing the normal use of the overflow weir, the production is influenced by regularly stopping and cleaning. As shown in figure 1, overflow weir inner space is little, almost is totally closed structure, and the clearance gets up to take time, the degree of difficulty is big, even the shut down produces and clears up, the short time also can't thoroughly clean up at all, this is because feed liquor pipe and blow off pipe are the coil pipe formula overall arrangement, and the space is narrow, need to dismantle the pipeline section by section then manual cleaning again, and plus the deposit cohesiveness is strong, and the clearance effect is difficult to guarantee, uses the repeated scale deposit of a period again after the clearance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can reduce overflow weir scale deposit, guarantee the stable overflow weir system of feed liquor volume.

In order to realize the purpose, the utility model discloses a technical scheme be: the overflow weir system comprises a primary dynamic wave washing unit, a gas cooling tower and a secondary dynamic wave washing unit which are sequentially arranged at the upper and lower reaches, wherein a primary pump pumps washing liquid in a primary washing liquid storage tank of the primary dynamic wave washing unit to a liquid inlet pipe of an overflow weir arranged on a primary washing cylinder of the primary dynamic wave washing unit through a first pipeline, and the liquid inlet pipe is also connected with a clean liquid medium pipeline.

In the scheme, the dynamic wave washing principle determines that most of high-temperature dust-containing smoke is cooled and dedusted in the primary dynamic wave washing process, so that the solid content of primary dynamic wave washing liquid is the highest, a clean liquid medium pipeline is additionally arranged on the basis of an original system and is connected with a liquid inlet pipe, and a clean liquid medium is used as a liquid inlet source of an overflow weir, so that the scaling speed is fundamentally reduced, and the problem of frequent cleaning is solved.

Drawings

FIG. 1 is a cross-sectional view of a weir;

Fig. 2 is the liquid inlet schematic diagram of the present invention.

Detailed Description

As shown in fig. 1 and 2, the overflow weir system comprises a primary dynamic wave washing unit, a gas cooling tower 30 and a secondary dynamic wave washing unit which are sequentially arranged at the upper and lower reaches, wherein a primary pump 22 pumps washing liquid in a primary washing liquid storage tank 21 of the primary dynamic wave washing unit to a liquid inlet pipe 11 of an overflow weir 10 arranged on a primary washing cylinder 23 of the primary dynamic wave washing unit through a first pipeline 60, and the liquid inlet pipe 11 is further connected with a clean liquid medium pipeline. The dynamic wave washing principle determines that most of high-temperature dust-containing smoke is cooled and dedusted in the primary dynamic wave washing process, so that the solid content of primary dynamic wave washing liquid is highest, a cleaning liquid medium pipeline is additionally arranged on the basis of an original system and is connected with a liquid inlet pipe, when the whole system is just started, the primary dynamic wave washing liquid is still relatively clean, the primary dynamic wave washing liquid can be pumped into the overflow weir 10 by using an original first pipeline 60, after a period of time, the solid content of the primary dynamic wave washing liquid is increased, and at the moment, the cleaning liquid medium is reused as a liquid inlet source of the overflow weir. The term "cleaning fluid" is used herein to refer to a fluid that is relatively cleaner than the cleaning fluid of the first-stage dynamic wave washing unit.

as the preferred scheme of the utility model, the feed liquor pipe 11 of gas cooling tower 30 and overflow weir 10 is by the second pipeline 50 intercommunication, sets up second grade pump 51 on the second pipeline 50, and the liquid medium in the gas cooling tower 30 is just clean liquid medium. The solid content of the washing liquid of the gas cooling tower is greatly reduced compared with that of a first-level dynamic wave, and compared with a second-level dynamic wave washing unit, the distance from the gas cooling tower to the overflow weir 10 is quite short, so that the cooling liquid in the gas cooling tower is preferably used as clean liquid, the cleanliness of the liquid inlet of the overflow weir 10 is improved, and the scaling speed is reduced.

Further, a pneumatic valve 12 is disposed on the liquid inlet pipe 11, and the pneumatic valve 12 controls the first and second pipelines 60, 50 to alternately or simultaneously communicate with the liquid inlet pipe 11. The pneumatic valve 12 can control the on-line switching of the new liquid inlet mode and the old liquid inlet mode, the on-line switching of the liquid inlet mode of the primary dynamic wave washing liquid and the liquid inlet mode of the gas cooling tower washing liquid simultaneously fed to the overflow weir 10 and the independent liquid inlet mode of the two modes is realized, and the risk resistance of the equipment is enhanced.

In order to facilitate the monitoring of the flow rate of each pipeline, the first flow meter 52 is disposed on the second pipeline 50, and the remote pressure gauge 13 and the second flow meter 14 are disposed on the liquid inlet pipe 11.

The first-stage washing cylinder 23 is internally provided with a first nozzle 15 communicated with the liquid inlet pipe 11, and the liquid spraying direction of the first nozzle 15 is upward. The high-temperature flue gas and the washing liquid are collided at a high speed in a reverse direction and are fully contacted in the primary washing cylinder 23, so that the processes of gas-liquid mass transfer and heat transfer are completed, and the purposes of cooling and dedusting the flue gas are achieved.

Further, the tower body of the secondary dynamic wave washing unit is connected with an electric demister 70, and the purified smelting flue gas is demisted by the electric demister 70 and then discharged.

The acid mixing mode of the cleaning solution is just opposite to the flowing direction of the flue gas, the secondary dynamic wave washing unit is communicated with the process water replenishing through the first valve 41, the cleaning solution of the secondary dynamic wave washing unit is mixed with the acid to the gas cooling tower 30 through the second valve 42, the gas cooling tower 30 is mixed with the acid to the primary dynamic wave washing unit through the third valve 31, and the primary dynamic wave washing unit is mixed with the acid to the precipitation tank through the fourth valve 23, so that the cleaning solution of the whole flue gas purification system is kept relatively clean.

In order to monitor the liquid levels of the primary dynamic wave washing unit, the gas cooling tower 30 and the secondary dynamic wave washing unit, liquid level detection units 80 are arranged in the tower bodies of the primary dynamic wave washing unit, the gas cooling tower 30 and the secondary dynamic wave washing unit, and the liquid level detection units 80 detect the liquid level conditions in the towers and control the opening and closing of the first valves 41, the second valves 42, the third valves 31 and the fourth valves 23.

Similarly, the rear end of the secondary pump 51 of the gas cooling tower 30 is further connected with a pipeline to the top of the gas cooling tower 30 to form self-circulation to cool itself, the tower body of the secondary dynamic wave washing unit is connected with a secondary washing barrel 43, the rear end of the third circulating pump 44 is further connected with a pipeline to the interior of the secondary washing barrel 43 and communicated with the second nozzle 45, and the liquid spraying direction of the second nozzle 45 is upward. The flue gas and the washing liquid collide with each other in the second-stage washing barrel 43 in a reverse direction at a high speed and are fully contacted, so that the processes of gas-liquid mass transfer and heat transfer are completed, and the purposes of cooling and dedusting the flue gas are further achieved.

Further, a fifth valve 32 is arranged between the primary dynamic wave washing unit and the gas cooling tower 30.

Claims

1. The utility model provides an overflow weir system, includes that the upper and lower reaches arrange in proper order one-level dynamic wave washing unit, gas cooling tower (30) and second grade dynamic wave washing unit, its characterized in that: the primary pump (22) pumps the washing liquid in the primary washing liquid storage tank (21) of the primary dynamic wave washing unit to a liquid inlet pipe (11) of an overflow weir (10) arranged on a primary washing cylinder (23) of the primary dynamic wave washing unit through a first pipeline (60), and the liquid inlet pipe (11) is also connected with a clean liquid medium pipeline.

2. The weir system of claim 1, wherein: the gas cooling tower (30) is communicated with a liquid inlet pipe (11) of the overflow weir (10) through a second pipeline (50), a secondary pump (51) is arranged on the second pipeline (50), and the liquid medium in the gas cooling tower (30) is the clean liquid medium.

3. The weir system according to claim 1 or 2, wherein: the liquid inlet pipe (11) is provided with a pneumatic valve (12), and the pneumatic valve (12) controls the first pipeline (60) and the second pipeline (50) to be communicated with the liquid inlet pipe (11) alternatively or simultaneously.

4. The weir system of claim 2, wherein: the second pipeline (50) is provided with a first flowmeter (52), and the liquid inlet pipe (11) is also provided with a remote pressure gauge (13) and a second flowmeter (14).

5. The weir system of claim 1, wherein: a first nozzle (15) communicated with the liquid inlet pipe (11) is arranged in the first-stage washing cylinder (23), and the liquid spraying direction of the first nozzle (15) is upward.

6. The weir system of claim 1, wherein: the tower body of the secondary dynamic wave washing unit is connected with an electric demister, and the purified smelting flue gas is demisted by the electric demister and then discharged.

7. The weir system of claim 1, wherein: the secondary dynamic wave washing unit is communicated with the process water replenishing through a first valve (41), the washing liquid of the secondary dynamic wave washing unit is connected with the gas cooling tower (30) in series through a second valve (42), the gas cooling tower (30) is connected with the primary dynamic wave washing unit in series through a third valve (31), and the primary dynamic wave washing unit is connected with the precipitation tank in series through a fourth valve (24).

8. The weir system of claim 7, wherein: liquid level detection units (70) are arranged in the tower bodies of the primary dynamic wave washing unit, the gas cooling tower (30) and the secondary dynamic wave washing unit, and the liquid level detection units (70) detect liquid level conditions in the towers and control the opening and closing of the first valve, the second valve, the third valve and the fourth valve (41, 42, 31 and 24).

9. The weir system of claim 7, wherein: the rear end of a secondary pump (51) of the gas cooling tower (30) is also connected with a pipeline to the top of the gas cooling tower (30) to form self circulation, the tower body of a secondary dynamic wave cleaning solution storage tank (46) is connected with a secondary washing cylinder (43), the rear end of a third circulating pump (44) is also connected with a pipeline to the interior of the secondary washing cylinder (43) and communicated with a second nozzle (45), and the liquid spraying direction of the second nozzle (45) is upward.

10. The weir system of claim 7, wherein: a fifth valve (32) is also arranged between the primary dynamic wave washing unit and the gas cooling tower (30).