CN2357812Y

CN2357812Y - High temp. dry method desulfurizing dust remover

Info

Publication number: CN2357812Y
Application number: CN 98200883
Authority: CN
Inventors: 黎英豪
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-02-12
Filing date: 1998-02-12
Publication date: 2000-01-12
Anticipated expiration: 2008-02-12

Abstract

The utility model relates to a dry method desulfurizing dust remover, which is especially suitable for kilns firing refractory bricks, ceramic, etc. and various industrial high temperature devices.; the suitable working temperature is from 20DEG. C to 1000DEG. C. The utility model is characterized in that dust removing efficiency can be improved through adopting a temperature difference vortex structure; the high efficiency inner cooling can be carried out in the dust remover, causing that the device can coolingly run; the continuous desulphurization and the secondary fine dust removal can be carried out for smoke through adopting fire-resisting solid desulphurizer. The dust removing efficiency of the utility model is from 96% to 98%; the desulfuring efficiency is from 40% to 80%; Ringelmann blackness is less than one stage; the suitable smoke temperature is from 20DEG. C to 1000DEG. C; the resistance is from 90 millimeter water column to 180 millimeter water column.

Description

High-temperature dry desulfurization dust remover

The dust removal and the desulfurization of industrial high-temperature equipment are always difficult problems and blanks, particularly for high-temperature furnaces firing large-brick-resistant and ceramic-resistant furnaces, the temperature of the waste gas of fire coal is as high as 800-1000 ℃, the existingvarious dust collectors and desulfurization devices (and fans) cannot adapt to the high-temperature furnaces, the smoke can only be directly discharged into the atmosphere, the dust concentration and the sulfur dioxide content of the smoke exceed the national environment-friendly allowable value by several times to more than ten times, and the ecological environment is seriously polluted.

The utility model aims at designing a high-temperature dry desulfurization dust remover which can resist high temperature, remove dust and has high desulfurization efficiency and small resistance. The principle is characterized in that: (1) a temperature difference rotational flow structure is adopted to improve the dust removal efficiency; (2) carrying out high-efficiency internal cooling in a dust remover to ensure that the equipment is cooled and operated; (3) the high-temperature resistant solid desulfurizer is used for continuous desulfurization and secondary fine dust removal of flue gas.

The utility model is particularly suitable for dry dedusting and desulfurization of furnaces and various industrial high-temperature devices for firing refractory bricks, ceramics and the like.

Fig. 1 is a sectional view of fig. 1 from a-a, fig. 3 from B-B, and fig. 4 shows a single cyclone. FIG. 5 is a cross-section taken along line C- -C of FIG. 4.

The utility model discloses a high temperature dry desulfurization dust remover, mainly include a plurality of little cyclones 8, cooling water tank 10, fill shape filter screen 5, arrange the material pipe 9, total unloading mouth 14, water inlet 11, delivery port 4, particle filter layer 16 and vibrating motor 18 etc. (figure 1)

The temperature difference rotational flow structure is that 8 (or more) small cyclones 8 are arranged in a rectangular shell, and the structure is shown in figures 1 and 3. 21 is a general inlet for flue gas, which is divided into several branch pipes connected to the inlets 7 of the small cyclones and entering tangentially (fig. 3), each small cyclone 8 having its own ash outlet and air flow rising pipe 6, which itself constitutes a cyclone. The efficiency of a plurality of small cyclones is much higher than that of a large cyclone. Because the shell of each small cyclone dust collector is cooled by flowing cooling water, the temperature of the inner wall of the shell is lower, and the temperature of flue gas flow in the shell is very high (800-1000 ℃), a temperature difference dust removal effect is formed: the high-temperature dust particles in the flue gas tend to gather on the inner wall of the low-temperature shell, so that the dust removal efficiency of each small cyclone is obviously improved.

The inner cooling function in the dust remover is that the gaps among the small cyclones 8 are filled with cooling water, the lower end of the cooling water tank 10 is provided with a water inlet 11, and the upper end is provided with a water outlet 4. (FIG. 1, FIG. 3). The cooling water is continuously fed in and out to ensure the cooling of the desulfurization dust remover. Because the cooling water only plays the effect of cooling, it does not participate in dust removal and desulfurization reaction, and the cooling water does not contact with the flue gas, so the utility model belongs to the dry-type structure. The cooling water can be recycled after heat dissipation.

The flue gas desulfurization effect is realized by drying the flue gas subjected to dust removal by using a high-temperature resistant solid desulfurizerAnd (4) desulfurizing by a method. The desulfurizer comprises the following components: (1) dolomite MgCo₃·CaCo₃Roasting and preparing powder, wherein the component is Mgo. Cao; (2) fly ash (or furnace ash crushed into powder): (3) and (3) bentonite. The three are mixed with proper amount of water according to a certain proportion and then mixed evenly. Pressing the mixture into a similar spherical object with the diameter of 20-25 mm by using a briquette machine, and then carrying out drying and curing process treatment (steam curing). The fly ash is used as the waste after dust removal, which can improve the air permeability of the desulfurizer ball material, and the bentonite is used as the binder, so as to increase the mechanical strength of the ball material. The dolomite is mainly Mgo and secondarily Cao, which are strong alkaline substances, and the Mgo and the Cao are subjected to desulfurization chemical reaction with sulfur dioxide in flue gas as follows:

the desulfurizer pellets 3 are fed from a star feeder 2 at the top of the equipment and are arranged in the space of a bucket-shaped filter screen 5 (figure 1 and figure 2). The secondary dust removal (fine dust removal) is that the airflow after the coarse dust removal and the desulfurization is flushed downwards at the top by the ascending elbow 15, the airflow is flushed towards the sand particle layer 16 (with a net and a frame), and the airflow is exhausted from the top 1 of the dust remover under the suction of the induced draft fan. The dust in the air flow is flushed (drilled) into the gaps of the sand particles, so that secondary dust removal (fine dust removal) is completed, and the air flow does not pass through the particle layers and only impacts the particle layers, so that the increased resistance is small.

After a period of time(4-8 hours), the filtering particle layer is cleaned, the dust is removed by the motor 18 with the vibration effect, the eccentric wheel 17 at the end of the motor shaft drives the particle net and the frame to vibrate up and down, and the fine dust which is vibrated down is discharged through the inclined plate 19 and the dust falling pipe 20. The vibration ash removal is carried out intermittently (once in 4-8 hours and once vibration for 10-15 minutes), when the vibration ash removal is carried out, the airflow dust removal operation is carried out continuously without mutual influence, the lower end of the discharging pipe 9 is provided with a gate valve 13 which blocks the desulfurization ball material from discharging (only dust discharged by dust removal) at ordinary times, and when the valve is pulled out and pulled open, the ball material and the dust are discharged from a main ash discharging port 14 (provided with a star-shaped discharger) together.

After secondary dust removal (fine dust removal), the clean air flow is discharged from the air flow outlet 1 at the top of the dust remover. Due to the high-efficiency internal cooling effect, the temperature of the discharged flue gas is lower than 350 ℃. The desulfurizer ball material area has a certain dust removal function, and further improves the dust removal efficiency. The hopper-shaped filter screen 5 is made of a wear-resistant steel wire mesh.

When the used desulfurizer pellets need to be replaced after a period of time, the desulfurizer pellets are discharged together with dust from the dust hopper 12 through the discharge pipe 9 and the total dust discharge port 14, as shown in fig. 1. Then new desulfurizer ball material is loaded from the top of the equipment. The desulfurizer pellets discharged after use are crushed and re-agglomerated to prepare the fly ash brick which is a building material product.

The utility model discloses main technical performance

1. Dust removal efficiency: 96 to 98 percent

2. Desulfurization efficiency: 40 to 80 percent

3. Lingemann blackness: grade no more than 1

4. The adaptive flue gas temperature is as follows: 20 to 1000 DEG C

5. The resistance of the device: 90-180 mm water column.

Claims

1. A high-temperature dry desulfurization dust remover mainly comprises a plurality of small cyclones, a cooling water tank body, a hopper-shaped filter screen, a desulfurizer ball material, a discharge pipe, a total ash discharge port, a water inlet, a water outlet, an ascending bent pipe, a filter material layer and a vibration mechanism. The utility model is characterized in that:

the temperature difference rotational flow structure is characterized in that a plurality of small cyclones 8 are arranged in a cooling water tank body 10, a flue gas main inlet 21 is connected with inlets 7 of the small cyclones, and a plurality of air flow ascending pipes 6 are arranged;

2. the high temperature dry desulfurization dust collector of claim 1, characterized in that:

the internal cooling mechanism is characterized in that cooling water is filled among the small cyclones 8, the lower end of the cooling water tank body 10 is provided with a water inlet 11, and the upper end of the cooling water tank body is provided with a water outlet 4.

3. The high temperature dry desulfurization dust collector of claim 1, characterized in that:

1) the high-temperature dry desulfurization isto use a high-temperature resistant solid desulfurizer ball material 3 to desulfurize flue gas in a time-lapse mode, wherein the desulfurizer consists of dolomite powder, fly ash and bentonite according to a certain proportion, and then pelletizing and curing treatment are carried out:

2) the desulfurizer ball material 3 is loaded into the hopper-shaped filter screen 5 from the top of the equipment, and when the desulfurizer ball material is replaced after being used, the desulfurizer ball material 3 is discharged together with dust in the dust collecting hopper 12 through the discharge pipe 9 and the total dust discharge port 14.

4. The high-temperature dry desulfurization dust collector as set forth in claims 1 and 2, wherein:

the secondary (fine) dust removal is completed by an ascending elbow 15, a filter material layer 16 and a vibration mechanism 17.