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Method for prolonging service life of spray tower

A spray tower, life-span technology, applied in separation methods, chemical instruments and methods, use of liquid separation agents, etc., can solve the problem of inability to change the ratio of water pressure to air pressure, corrosion at the bottom of the spray tower, and inability to achieve optimal atomization Effect and other issues, to achieve the best atomization effect and avoid long-term electrification

Active Publication Date: 2013-07-31
SNTO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing control technology has the following disadvantages: 1. The roasting temperature is generally 140 to 160 degrees. The first group of valves takes the most time to open, while the other two groups of valves basically do not open. The spraying is disabled for a long time, and it is easy to block after corrosion. Nozzle; 2. The roasting flue gas contains sulfur. After atomization, it will form a weak acid with the flue gas, and the pH value is less than 4. This kind of acid mist is easy to cause corrosion of the spray tower wall, and the first group of valves has the longest opening time. , the acid mist generated on this side is the most, and the tower wall near the first group of spray solenoid valves is extremely corroded. The actual situation is that after the first group of solenoid valves has been perforated, the opposite tower wall is still 10mm thick, basically uncorroded; 3. The ratio of water pressure and air pressure cannot be changed in the existing control instructions, and the best effect of atomization cannot be achieved. After excessive water spraying, acidic liquid will be formed at the bottom of the spray tower, which will cause great corrosion to the bottom of the spray tower. If it is not enough, it will not be able to cool the flue gas; 4. Based on the emergency consideration of power failure, the original design of the solenoid valve is a normally open valve.

Method used

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  • Method for prolonging service life of spray tower
  • Method for prolonging service life of spray tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, the spray tower includes three sets of solenoid valves 11, 12, 13 controlled by the PLC controller, and the three sets of solenoid valves 11, 12, 13 control the opening and closing of the water spray valve and the air spray valve, and are designed in the PLC controller The one-cycle control module realizes the sequential control of three sets of solenoid valves 11, 12, and 13: when the spray tower starts to work, the solenoid valve 11 is the first set of solenoid valves, the solenoid valve 12 is the second set of solenoid valves, and the solenoid valve 13 is the second set of solenoid valves. Three groups of solenoid valves; after four hours, the PLC controller sends an adjustment command, the solenoid valve 12 is the first group of solenoid valves, the solenoid valve 13 is the second group of solenoid valves, and the solenoid valve 11 is the third group of solenoid valves; after eight hours Afterwards, the PLC controller issues an adjustment ...

Embodiment 2

[0039] Such as figure 1As shown, the spray tower includes three sets of solenoid valves 11, 12, 13 controlled by the PLC controller, and the three sets of solenoid valves 11, 12, 13 control the opening and closing of the water spray valve and the air spray valve, and are designed in the PLC controller The one-cycle control module realizes three sets of solenoid valves 11, 12, 13 to be controlled in order to enter the working state: when the spray tower starts to work, the solenoid valve 11 is the first set of solenoid valves, the solenoid valve 12 is the second set of solenoid valves, and the solenoid valves 13 is the third group of solenoid valves; after four hours, the PLC controller sends an adjustment command, the solenoid valve 12 is the first group of solenoid valves, the solenoid valve 13 is the second group of solenoid valves, and the solenoid valve 11 is the third group of solenoid valves; After eight hours, the PLC controller sends an adjustment instruction again, th...

Embodiment 3

[0043] Such as figure 1 As shown, the spray tower includes three sets of solenoid valves 11, 12, 13 controlled by the PLC controller, and the three sets of solenoid valves 11, 12, 13 control the opening and closing of the water spray valve and the air spray valve, and are designed in the PLC controller The first cycle control module realizes three sets of solenoid valves 11, 12, and 13 to be the first set of solenoid valves in turn: when the spray tower starts to work, the solenoid valve 11 is the first set of solenoid valves, and the solenoid valve 12 is the second set of solenoid valves. Solenoid valve 13 is the third group of solenoid valves; after four hours, the PLC controller sends an adjustment command, solenoid valve 12 is the first group of solenoid valves, solenoid valve 13 is the second group of solenoid valves, and solenoid valve 11 is the third group of solenoid valves. valve; after eight hours, the PLC controller sends out an adjustment instruction again, the sol...

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Abstract

The invention relates to a method for prolonging the service life of a spray tower. The spray tower comprises three groups of electromagnetic valves (11, 12 and 13) controlled by a programmable logic controller (PLC), wherein the three groups of electromagnetic valves (11, 12 and 13) control the opening and closing of a water spray wave and a gas spray valve; and a circulating control module is designed in the PLC controller to realize the control of the three groups of electromagnetic valves (11, 12 and 13) over the spray valves as the first group of electromagnetic valve in turn. In the method, a command can be given automatically according to a preset time value, and the groups of electromagnetic valves are used in turn to avoid excessive corrosion of the spray valves and spray tower wall on a certain side; and on the other hand, the PLC can change the ratio of a water pressure to a gas pressure automatically to realize a better atomizing effect.

Description

1. Technical field [0001] The invention belongs to the field of automatic control desulfurization and dust-proof equipment, and in particular relates to a method for prolonging the service life of a spray tower. 2. Background technology [0002] The existing spray and atomization device includes water spray solenoid valve, air spray solenoid valve, booster pump, pressure gauge, flow meter, and automatic regulating valve. When the temperature of the flue gas exceeds the set value, the PLC controller will issue an opening after receiving the instruction. The information of the first group of water spray valves and air spray valves, the solenoid valves are turned on to start spraying, to achieve cooling effect, the six solenoid valves are divided into three groups, distributed in an equilateral triangle, when the flue gas temperature reaches 130 degrees, open One group of solenoid valves, when the temperature reaches 150 degrees, open the second group of solenoid valves, and wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/18B01D47/06
Inventor 张友权
Owner SNTO TECH GRP