CN204543980U - A kind of desulfurizing tower system - Google Patents

Abstract

The utility model discloses a desulfurization tower system, which is characterized in that the desulfurization tower system comprises two sets of desulfurization towers, that is, desulfurization tower A (1) and desulfurization tower B (2); the two sets of desulfurization towers share a circulation tank (3), two sets of desulfurization towers are symmetrically arranged on both sides of the circulation tank (3), and the circulation tank (3) is located on the central axis of the south side of the chimney. The utility model is designed with three spraying layers, which can reduce the spraying load and the amount of spraying on the premise of ensuring the desulfurization efficiency, thereby reducing the power of the circulating pump and achieving the effect of saving energy. At the same time, the utility model can start only one circulation pump, which reduces energy consumption during operation, and the desulfurization system has a high degree of automation and high system operation stability.

Description

A desulfurization tower system

technical field

The utility model relates to sulfur dioxide, in particular to a desulfurization tower.

Background technique

The existing desulfurization technology has problems such as large investment, high operating cost, easy corrosion of pipelines, complicated process flow, complicated operation, and if the conditions are not well controlled, another kind of emissions will also be produced. The inventor designed the tower through on-site experiments and combined with production to better absorb the content of low-concentration sulfur dioxide in the production of sulfuric acid enterprises, so that it can meet the requirements of the new national standard ≤ 400 mg/ NM ³ from October 1, 2013 .

Contents of the invention

The purpose of the utility model is to provide a desulfurization tower system with good desulfurization effect.

The technical solution of the utility model: the desulfurization tower system includes two sets of desulfurization towers, namely, desulfurization tower A and desulfurization tower B; the two sets of desulfurization towers share a circulation tank, and the two sets of desulfurization towers are symmetrically arranged on both sides of the circulation tank. The circulation tank is located on the central axis on the south side of the chimney.

The flue gas system of the desulfurization tower system enters the desulfurization tower A and the desulfurization tower B respectively from the flue gas inlet A and the flue gas inlet B, and the sulfuric acid tail gas flue gas of A and B is relatively independent. The flue gas from desulfurization tower B comes out of outlet B and flows into the original flue.

The flue gas inlets of the two sets of desulfurization towers are equipped with a pretreatment spray layer, and the pretreatment spray layer is supplied by a pipeline washing pump; the two sets of desulfurization towers are equipped with three-stage annular spray layers. There are multiple nozzles on the spray layer pipeline, and each layer of nozzles and the lower layer of nozzles are staggered at a certain angle to ensure that the spray slurry covers the entire tower body, so as to achieve efficient absorption of _SO2 in the flue gas and clean the flue gas. The fine particles and mist are removed by the demister and discharged into the chimney; the rich liquid that has absorbed SO ₂ enters the circulation tank through the chute at the bottom of the desulfurization tower, and the slurry is sent from the circulation tank to the desulfurization tower through the circulation pump and pipeline washing pump to participate in desulfurization reaction.

The upper part of the desulfurization tower body is equipped with an agitator motor to drive one or more layers of agitator blades through the shaft, and the agitator blades are arranged at the bottom of the tower body to ensure that the concentrate slurry is evenly mixed without blocking pipes and pumps; The spray layer nozzle in the desulfurization tower adopts an atomized spray nozzle, and the material of the nozzle adopts silicon carbide mixed with emery;

The desulfurization tower A and the desulfurization tower B respectively correspond to one or more circulating pumps A and circulating pumps B and one or more pipeline washing pumps A and pipeline washing pumps B, and the type selection of the circulating pumps and pipeline washing pumps The flow rate is 1.1 times of the design flow rate.

The desulfurization tower system adopts an anti-corrosion layer, which are: the inner spray pipe of the desulfurization tower adopts a steel-lined ceramic pipe, and the outer wall of the pipe is lined with pre-vulcanized butyl rubber; the inner wall of the desulfurization tower is lined with bricks for corrosion protection , The spray layer is lined with glass flakes for anti-corrosion. The outlet flue gas pipe of the desulfurization tower is made of steel-lined glass scales; the phosphate concentrate slurry pipe is made of 16Mn material pipe, and the return slurry pipe is made of steel skeleton composite pipe; .

 Because the glass flakes are used for anti-corrosion in the tower, in order to prevent the glass flakes from being damaged by excessive temperature, a temperature transmitter is installed at the flue gas inlet, and a temperature transmitter is also installed at the outlet of the spray layer of the desulfurization tower.

The beneficial effects of the utility model:

1. It is designed with three spray layers, which can reduce the spray load and spray volume under the premise of ensuring the desulfurization efficiency, thereby reducing the power of the circulating pump and achieving the effect of saving energy.

2. Make full use of the company's existing site and existing public facilities to save engineering investment.

3. Two-tower scheme When one set of flue gas is running and the other set of flue gas is out of service, only one circulation pump can be started, which reduces energy consumption during operation, and the desulfurization system has a high degree of automation and high system operation stability.

4. The desulfurization agent of the present invention adopts the existing sufficient supply of phosphorus concentrate slurry in the factory, and the SO ₂ concentration after desulfurization is ≤400 mg/Nm ³ .

Description of drawings

Figure 1 is a schematic structural view of the utility model;

Figure 2 is a schematic diagram of desulfurization tower A;

In the figure: 1-desulfurization tower A; 2-desulfurization tower B; 3-circulation tank; 4-circulation tank agitator; 5-flue gas inlet A, 6-flue gas inlet B; 7-flue gas outlet A; 8- Flue gas outlet B; 9-demister; 10-pretreatment spray layer; 11-three-stage annular spray layer, 12-nozzle; 13-slurry pump; 14-circulation pump A; 15-circulation pump B; 16-pipeline washing pump A; 17-pipeline washing pump B.

Detailed ways

A desulfurization tower system, the desulfurization tower system includes 2 sets of desulfurization towers, namely, desulfurization tower A1 and desulfurization tower B2; the two sets of desulfurization towers share a circulation tank 3, and the two sets of desulfurization towers are symmetrically arranged on both sides of the circulation tank 3 , the circulation groove 3 is located on the central axis on the south side of the chimney.

The flue gas system of the desulfurization tower system enters the desulfurization tower A1 and the desulfurization tower B2 respectively from the flue gas inlet A5 and the flue gas inlet B6. The flue gas outlet B8 of the desulfurization tower B2 comes out and merges into the original flue.

The desulfurization tower A1 and the desulfurization tower B2 respectively correspond to a circulating pump A14 and a circulating pump B15 and a pipeline washing pump A16 and a pipeline washing pump B17, and the selection flow rate of the circulating pump and the pipeline washing pump is 1.1% of the design flow times.

The flue gas inlets of the two sets of desulfurization towers are all provided with a pretreatment spray layer 10, and the pretreatment spray layer 10 is supplied by a pipeline washing pump; the two sets of desulfurization towers are all provided with a three-stage annular spray layer 11, each There are multiple nozzles 12 on the stage ring spray layer pipeline, and the nozzles 12 of each layer are staggered with the nozzles of the lower layer and the upper and lower layers of nozzles by 30 degrees to ensure that the spray slurry covers the entire tower body and achieve high efficiency for _SO2 in the flue gas. Absorption, the clean flue gas is discharged into the chimney through the demister to remove fine particles and droplets; the rich liquid that has absorbed SO ₂ enters the circulation tank 3 through the chute at the bottom of the desulfurization tower, and the slurry is recycled from the circulation tank through the circulation pump and the pipeline washing pump Sent to the desulfurization tower to participate in the desulfurization reaction.

The upper part of the desulfurization tower body is equipped with an agitator motor to drive one or more layers of agitator blades through the shaft, and the agitator blades are arranged at the bottom of the tower body to ensure that the concentrate slurry is evenly mixed without blocking pipes and pumps; The nozzles of the spray layer in the desulfurization tower are atomized spray nozzles, and the material of the nozzles is silicon carbide mixed with emery.

The desulfurization tower system adopts an anti-corrosion layer, which are: the inner spray pipe of the desulfurization tower adopts a steel-lined ceramic pipe, and the outer wall of the pipe is lined with pre-vulcanized butyl rubber; the inner wall of the desulfurization tower is lined with bricks for corrosion protection , The spray layer is lined with glass flakes for anti-corrosion. The outlet flue gas pipe of the desulfurization tower is made of steel-lined glass scales; the phosphate concentrate slurry pipe is made of 16Mn material pipe, and the return slurry pipe is made of steel skeleton composite pipe; .

 Because the glass flakes are used for anti-corrosion in the tower, in order to prevent the glass flakes from being damaged by excessive temperature, a temperature transmitter is installed at the flue gas inlet, and a temperature transmitter is also installed at the outlet of the spray layer of the desulfurization tower.

Claims (7)

1. a desulfurizing tower system, is characterized in that described desulfurizing tower system comprises 2 cover desulfurizing towers, i.e. desulfurizing tower A(1), desulfurizing tower B(2); Described two cover desulfurizing towers share a circulating slot (3), and two cover desulfurizing towers are arranged symmetrically in circulating slot (3) both sides, and circulating slot (3) is positioned on axis, chimney southern side.

2. desulfurizing tower system according to claim 1, it is characterized in that described desulfurizing tower A(1), desulfurizing tower B(2) flue gas relatively independent, the flue gas of system is by gas approach A(5), gas approach B(6) enter desulfurizing tower A(1 respectively), desulfurizing tower B(2), desulfurizing tower A(1) exhanst gas outlet A(7), desulfurizing tower B(2) exhanst gas outlet B(8) out import former flue afterwards.

3. desulfurizing tower system according to claim 1, it is characterized in that described desulfurizing tower A(1), desulfurizing tower B(2) respective corresponding one or more circulating pump A(14) and circulating pump B(15) and one or more pipeline washing pump A(16) and pipeline washing pump B(17), the type selecting flow of described circulating pump, pipeline washing pump is 1.1 times of design discharge.

4. desulfurizing tower system according to claim 3, it is characterized in that the gas approach place of described two cover desulfurizing towers is equipped with pretreatment spraying layer (10), pretreatment spraying layer (10) is supplied by pipeline washing pump; Be equipped with tertiary circulation type spraying layer (11) in two cover desulfurizing towers, every grade of ring-like spraying layer pipeline is provided with branched shower nozzle (12), and every layer of shower nozzle and lower layer sprayer head and the mutual wrong 20-40 degree of levels shower nozzle, to ensure that sprayed slurry covers whole tower body.

5. desulfurizing tower system according to claim 1, it is characterized in that described two cover desulfurizing tower tower body tops arrange agitator motor and drive one or more layers propeller-blade by axle, described propeller-blade is arranged on the bottom of tower body, ensures that concentrate slurry mixes, unlikely blocking pipe and pump; Spraying layer nozzle in described desulfurizing tower tower adopts Atomizing Spray Nozzle.

6. desulfurizing tower system according to claim 1, is characterized in that described two cover desulfurizing towers all have employed anticorrosive coat, is respectively: the internal sparger pipe of described desulfurizing tower adopts steel lining earthenware, manages outer wall liner presulfurization butyl rubber; Adopt lining brick anticorrosion below described desulfurizing tower inwall spraying layer, more than spraying layer serve as a contrast glass flake anticorrosion; The exiting flue gas pipe of described desulfurizing tower adopts glass-lined steel scale; Described circulating slot (3) adopts line with rubber, and it is anticorrosion that below 1m adds lining brick.

7. desulfurizing tower system according to claim 6, it is characterized in that the gas approach of described two cover desulfurizing towers all configures temperature transmitter, the outlet of desulfurizing tower spraying layer also configures temperature transmitter.