阅读说明：本技术 一种碱性粉磨料喷射系统及其工作方法 (Alkaline powder grinding material injection system and working method thereof ) 是由 薛方明 于 2019-08-28 设计创作，主要内容包括：本发明公开了一种碱性粉磨料喷射系统及其工作方法,包括烟道、破碎机、碱性料仓、给料装置、磨粉机、热风管、热风发生器和碱性料喷头,破碎机的出料口通过管道固定连接碱性料仓的进料口,碱性料仓的出料口固定连接给料装置的进料口,给料装置的出料口固定连接磨粉机的进料口,磨粉机的出料口通过管道固定连接热风管,热风管的一端固定连接热风发生器的出风口,在热风管上且位于热风发生器和管道之间固定连接有风机,热风管的另一端进入烟道内,并且固定连接碱性料喷头,在烟道上且位于碱性料喷头的上下两端分别固定连接有SCR脱销装置和空预器。本发明结构科学合理,对烟道内烟气中的酸性气体脱除效果好,操作方便,适合推广使用。(The invention discloses an alkaline grinding material injection system and a working method thereof, and the system comprises a flue, a crusher, an alkaline bin, a feeding device, a flour mill, a hot air pipe, a hot air generator and an alkaline material spray head, wherein a discharge port of the crusher is fixedly connected with a feed port of the alkaline bin through a pipeline, a discharge port of the alkaline bin is fixedly connected with a feed port of the feeding device, a discharge port of the feeding device is fixedly connected with a feed port of the flour mill, a discharge port of the flour mill is fixedly connected with the hot air pipe through a pipeline, one end of the hot air pipe is fixedly connected with an air outlet of the hot air generator, a fan is fixedly connected onto the hot air pipe and between the hot air generator and the pipeline, the other end of the hot air pipe enters the flue and is fixedly connected with the alkaline material spray head, and an SCR (selective catalytic reduction) pin removal device. The invention has scientific and reasonable structure, good effect of removing acid gas in flue gas in the flue, convenient operation and suitable popularization and use.)

1. The utility model provides an alkaline grinding material injection system, includes flue (10), its characterized in that: the alkaline material crushing device is characterized by further comprising a crusher (1), an alkaline material bin (3), a feeding device (4), a flour mill (5), a hot air pipe (6), a hot air generator (7) and an alkaline material spray head (9), wherein the discharge port of the crusher (1) is fixedly connected with the feed port of the alkaline material bin (3) through a pipeline (2), the discharge port of the alkaline material bin (3) is fixedly connected with the feed port of the feeding device (4), the discharge port of the feeding device (4) is fixedly connected with the feed port of the flour mill (5), the discharge port of the flour mill (5) is fixedly connected with the hot air pipe (6) through a pipeline (2), one end of the hot air pipe (6) is fixedly connected with the air outlet of the hot air generator (7), a fan (8) is fixedly connected between the hot air generator (7) and the pipeline (2) on the hot air pipe (6), and the other end of the hot air pipe (6) enters, and fixed connection alkaline material shower nozzle (9), on flue (10) and be located the upper and lower both ends of alkaline material shower nozzle (9) fixedly connected with SCR and take off round pin device (11) and air preheater (12) respectively, the flue gas exit fixedly connected with flue gas pressure test probe (14) of SCR taking off round pin device (11) bottom, on flue (10) and be located SCR and take off fixedly connected with flue gas pressure reduction means (13) between round pin device (11) and alkaline material shower nozzle (9), flue gas pressure test probe (14) electric connection flue gas pressure reduction means (13).

2. The alkaline powder abrasive blasting system of claim 1, wherein: the feeding device (4) is a screw feeder.

3. The alkaline powder abrasive blasting system of claim 1, wherein: the fan (8) is a high-temperature fan.

4. The alkaline powder abrasive blasting system of claim 1, wherein: the alkaline material spray head (9) is a grid type spray head.

5. An operating method of the alkaline powder mill injection system according to any one of claims 1-4, characterized in that: the method for manufacturing and spraying the alkaline powder abrasive comprises the following steps:

crushing: according to the feeding requirement of the flour mill (5), crushing the massive alkaline material to the required particle size by using a crusher (1);

storing materials: the crushed particles are conveyed into an alkaline storage bin (3) through a pipeline (2) to be stored;

feeding: conveying alkaline material particles stored in the alkaline material bin (3) into the pulverizer (5) through the feeding device (4);

grinding materials: grinding the alkaline material particles conveyed by the feeding device (4) into powder by a pulverizer (5);

feeding: the flour mill (5) conveys the ground powdery alkaline material into the hot air pipe (6) through the pipeline (2);

sixthly, flue pressure adjustment: a flue gas pressure reduction device (13) in the flue (10) reduces the pressure of the flue gas according to the flue gas pressure value at the flue gas outlet of the SCR denitration device (11) measured by a flue gas pressure detection probe (14), so that the pressure of the flue gas reaches the standard requirement;

seventh, spraying materials: opening a hot air generator (7) and a fan (8), blowing hot air in the hot air generator (7) into an alkaline material spray head (9) through a hot air pipe (6) by the fan (8) and into a flue (10), blowing alkaline material powder conveyed by a flour mill (5) into the alkaline material spray head (9) by the hot air and uniformly blowing the alkaline material powder into the flue (10) through the alkaline material spray head (9);

and eighthly, removing reaction: alkaline material powder blown into the flue (10) by the alkaline material spray head (9) reacts with the acid gas in the flue gas to remove the acid gas in the flue (10).

Technical Field

The invention relates to the technical field of alkaline material injection, in particular to an alkaline powder grinding material injection system and a working method thereof.

Background

In a flue of a power plant, SO can be contained in flue gas from an SCR denitration device₃Acid gases such as HCl and HF, which are easy to react to generate ammonium bisulfate and cause blockage of other equipment in a flue, thereby affecting the normal operation of the equipment, and once the equipment is blocked, the equipment is blockedThe invention provides an alkaline grinding material injection system and a working method thereof, which need to clean and waste a large amount of manpower and material resources.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides an alkaline powder abrasive material injection system and a working method thereof, and solves the problem that the flue gas discharged from an SCR denitration device of the flue of the existing power plant contains acidic gas, can react to generate ammonium bisulfate, and easily causes blockage of other equipment in the flue so as to prevent normal operation.

The technical scheme adopted by the invention for solving the problems is as follows: the alkaline powder grinding material injection system comprises a flue and is characterized in that: the device comprises a crusher, an alkaline bin, a feeding device, a flour mill, a hot air pipe, a hot air generator and an alkaline material spray head, wherein a discharge port of the crusher is fixedly connected with a feed port of the alkaline bin through a pipeline, a discharge port of the alkaline bin is fixedly connected with a feed port of the feeding device, a discharge port of the feeding device is fixedly connected with a feed port of the flour mill, a discharge port of the flour mill is fixedly connected with the hot air pipe through a pipeline, one end of the hot air pipe is fixedly connected with an air outlet of the hot air generator, a fan is fixedly connected on the hot air pipe and between the hot air generator and the pipeline, the other end of the hot air pipe enters a flue, the alkaline material spray head is fixedly connected with the SCR denitration device and the air preheater respectively at the upper end and the lower end of the alkaline material spray head on the flue, and a flue gas outlet at the bottom end of, and a flue gas pressure reduction device is fixedly connected on the flue and between the SCR denitration device and the alkaline material spray head, and the flue gas pressure detection probe is electrically connected with the flue gas pressure reduction device.

Further, the feeding device is a screw feeder.

Further, the fan is a high-temperature fan.

Further, the alkaline material spray head is a grid type spray head.

The invention also discloses a working method of the alkaline powder abrasive material spraying system, and the manufacturing and spraying method of the alkaline powder abrasive material comprises the following steps:

crushing: crushing the massive alkaline material to the required particle size by a crusher according to the feeding requirement of the pulverizer;

storing materials: conveying the crushed particles into an alkaline bin through a pipeline for storage;

feeding: conveying alkaline material particles stored in an alkaline material bin into a pulverizer through a feeding device;

grinding materials: grinding the alkaline material particles conveyed by the feeding device into powder by a pulverizer;

feeding: the flour mill conveys the ground powdery alkaline material into a hot air pipe through a pipeline;

sixthly, flue pressure adjustment: a smoke pressure reducing device in the flue reduces the pressure of smoke according to the smoke pressure value at the smoke outlet of the SCR pin removal device measured by the smoke pressure detection probe, so that the pressure of the smoke reaches the standard requirement;

seventh, spraying materials: opening a hot air generator and a fan, blowing hot air in the hot air generator into the alkaline material spray head through a hot air pipe by the fan, and feeding the hot air into the flue, and blowing alkaline material powder conveyed by the pulverizer into the alkaline material spray head by the hot air and uniformly blowing the alkaline material powder into the flue through the alkaline material spray head;

and eighthly, removing reaction: and reacting alkaline material powder blown into the flue by the alkaline material nozzle with the acid gas in the flue gas to remove the acid gas in the flue gas.

Compared with the prior art, the invention has the following advantages and effects: according to the invention, through the arrangement of the crusher, the alkaline bin, the feeding device, the flour mill, the hot air pipe, the hot air generator, the fan and the alkaline material spray head, massive alkaline materials can be processed and finally changed into powder, and then the powder is uniformly and accurately blown into the smoke outlet of the SCR denitration device, so that the alkaline material powder can remove acidic gas in smoke, the blockage of other equipment in a smoke channel due to the generation of a large amount of ammonium bisulfate is avoided, the blockage removing frequency of the equipment in the smoke channel is reduced, manpower and material resources are saved, and the service life of the equipment is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of an alkaline mill injection system in an embodiment of the present invention.

In the figure: 1-a crusher, 2-a pipeline, 3-an alkaline bin, 4-a feeding device, 5-a flour mill, 6-a hot air pipe, 7-a hot air generator, 8-a fan, 9-an alkaline material spray head, 10-a flue, 11-an SCR pin removal device, 12-an air preheater, 13-a flue gas pressure reduction device and 14-a flue gas pressure detection probe.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

Referring to fig. 1, it can be seen that: the alkaline grinding material injection system in the embodiment comprises a crusher 1, the crusher 1 can crush massive alkaline materials, a discharge port of the crusher 1 is fixedly connected with a feed port of an alkaline bin 3 through a pipeline 2, the alkaline bin 3 can store alkaline particles, the discharge port of the alkaline bin 3 is fixedly connected with a feed port of a feeding device 4, the feeding device 4 can convey the alkaline particles, the discharge port of the feeding device 4 is fixedly connected with a feed port of a pulverizer 5, the pulverizer 5 can grind the alkaline particles into powder, the discharge port of the pulverizer 5 is fixedly connected with a hot air pipe 6 through the pipeline 2, one end of the hot air pipe 6 is fixedly connected with an air outlet of a hot air generator 7, the hot air generator 7 can generate hot air, a fan 8 is fixedly connected between the hot air generator 7 and the pipeline 2 on the hot air pipe 6, and the fan 8 can transmit the hot air to a flue 10, the other end of hot-blast main 6 gets into in flue 10, and fixedly connected with alkaline material shower nozzle 9, alkaline material shower nozzle 9 can evenly spout the material, on flue 10 and the upper and lower both ends that are located alkaline material shower nozzle 9 are fixedly connected with SCR respectively and are taken off round pin device 11 and air preheater 12, the flue gas outlet fixedly connected with flue gas pressure test probe 14 of SCR takeoff round pin device 11 bottom, flue gas pressure test probe 14 can detect the pressure of flue gas in flue 10, on flue 10 and be located SCR and take off fixedly connected with flue gas pressure reduction means 13 between round pin device 11 and the alkaline material shower nozzle 9, flue gas pressure reduction means 13 can step down the flue gas.

The feeding device 4 is a screw feeder, so that feeding is convenient, stable and reliable; the fan 8 is a high-temperature fan, is suitable for conveying hot air and has long service life; the alkaline material spray head 9 is a grid type spray head, the discharge hole of the grid type spray head is of a grid type, the discharge range is large, and the discharge is uniform; flue gas pressure measurement probe 14 electric connection flue gas pressure reduction means 13, flue gas pressure measurement probe 14 survey the flue gas pressure size signal and can transmit for flue gas pressure reduction means 13.

The implementation process comprises the following steps:

the method for manufacturing and spraying the alkaline powder abrasive comprises the following steps:

crushing: according to the feeding requirement of the pulverizer 5, crushing massive alkaline materials to the required particle size by using a crusher 1, wherein the alkaline materials comprise hydroxides, carbonates and oxides of potassium, sodium and calcium, and crushing the alkaline materials to the particle size of 6-13 mm by using the crusher 1;

storing materials: the crushed particles are conveyed into an alkaline material bin 3 through a pipeline 2 to be stored, the size of the alkaline material bin 3 is 100 plus 200 cubic meters, and the alkaline material particles are stored according to the amount of about 7 days of use;

feeding: alkaline material particles stored in the alkaline bin 3 are conveyed into the pulverizer 5 through the feeding device 4, and the particles in the alkaline bin 3 are automatically conveyed into the pulverizer 5 through the screw feeder;

grinding materials: grinding the alkaline material particles conveyed by the feeding device 4 into powder by a grinding machine 5;

feeding: the flour mill 5 conveys the ground powdery alkaline material into a hot air pipe 6 through a pipeline 2;

sixthly, flue pressure adjustment: a flue gas pressure reduction device 13 in the flue 10 reduces the pressure of the flue gas according to the flue gas pressure value at the smoke outlet of the SCR denitration device 11 measured by a flue gas pressure detection probe 14, so that the pressure of the flue gas reaches the standard requirement, and the pressure difference between the flue gas pressure at the smoke outlet of the SCR denitration device 11 and the pressure of hot air blown out from the hot air pipe 6 is about 0.5 KPa;

seventh, spraying materials: the hot air generator 7 and the fan 8 are opened, the fan 8 blows hot air in the hot air generator 7 into the alkaline material spray head 9 through the hot air pipe 6 and enters the flue 10, meanwhile, the hot air blows alkaline material powder conveyed by the pulverizer 5 into the alkaline material spray head 9 and evenly blows the alkaline material powder into the flue 10 through the alkaline material spray head 9, the alkaline material spray head 9 is a grid type spray head and can evenly blow the alkaline material powder into flue gas, and sufficient reaction can be conveniently carried out on the alkaline material powder and acidic gas in the flue gas;

and eighthly, removing reaction: the alkaline material powder blown into the flue 10 by the alkaline material nozzle 9 reacts with the acid gas in the flue gas to remove the acid gas in the flue 10, and the acid gas in the flue gas mainly contains SO₃HCl and HF, alkaline material powder and acidic gas SO in flue gas₃HCl and HF react to remove SO in the flue gas₃And acidic gases such as HCl and HF avoid the generation of a large amount of ammonium bisulfate, and also avoid the blockage of other equipment in the flue 10 due to the ammonium bisulfate, and the gas in the flue 10 enters the air preheater 12 after being deprived of the acidic gases, and continues to run downwards after passing through the air preheater 12 and entering the flue 10.

According to the alkaline powder grinding material injection system and the manufacturing and injection method of the alkaline powder grinding material, massive alkaline materials can be processed and changed into powder finally through the arrangement of the crusher 1, the alkaline bin 3, the feeding device 4, the grinding machine 5, the hot air pipe 6, the hot air generator 7, the fan 8 and the alkaline material spray head 9, and then the powder is uniformly and accurately blown into the smoke outlet of the SCR denitration device 11, so that the alkaline material powder can remove acidic gas in smoke, the blockage of other equipment in the smoke channel 10 due to the generation of a large amount of ammonium bisulfate is avoided, the frequency of clearing the equipment in the smoke channel 10 is reduced, manpower and material resources are saved, and the service life of the equipment is prolonged.

Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.