CN205042133U - Energy -saving spray drier - Google Patents

Abstract

The utility model discloses an energy -saving spray drier, including feeding system, air inlet system, drying tower, a cyclone, the 2nd cyclone, membrane separator and draught fan, the air inlet system includes air cleaner, air -blower and the heating device who connects gradually through the pipeline, heating device links to each other with the air -supply line of drying tower, the blast pipe of membrane separator is connected to on the pipeline between air -blower and the heater through the draught fan. The utility model discloses in, air that the drying tower exhaust mixes fine grain material is through twice whirlwind after -separating, and the rethread membrane separator obtains thorough separation, and materiel recovered is efficient, and membrane separator combustion gas cleanliness factor is high, and the circulation is participated in on getting back to the pipeline between air -blower and the heater to the cleanliness factor that is close to fresh air basically, and contain more heat, can make the heat obtain make full use of, reduces energy consumption, energy saving.

Description

Energy-saving spray dryer

technical field

The utility model relates to an energy-saving spray dryer, which belongs to the technical field of drying equipment.

Background technique

The spray dryer is a kind of continuous atmospheric pressure dryer. The atomizer is used to disperse the material liquid into mist droplets, and the hot gas is used to dry the mist droplets to obtain the product. The main working process is: fresh air from the outside passes through the air filter, blower , into the air heater to increase the air temperature to about 160 ° C, and then sent to the drying tower. Before entering the drying tower, the hot air passes through the air uniform plate to distribute the hot air evenly, prevent the vortex, avoid the occurrence of coke powder, and ensure the drying effect. The material liquid to be dried is pumped to the atomizer by the pressure pump, the material liquid is sprayed out in the form of mist and mixed with hot air, the material particles absorb heat, the water evaporates instantly, and the powder is formed and falls downward. After a period of constant speed drying, The moisture is further evaporated, and the coarse particles fall into the conical bottom of the drying tower and are discharged. The mixture of dried material fine powder and low-temperature humid air is separated by a cyclone separator, the waste air is discharged by an exhaust fan, and the dry fine powder product falls and is continuously discharged by an unloader.

For materials whose dryness is required to be 1-3, the temperature of the waste air after separation of the spray dryer is about 50°C, and the heat contained is not high, but some materials require a dryness of less than 0.5. At this time, the spray dryer is separated The final waste air temperature can reach about 70°C, which contains a lot of heat, and direct discharge will cause a great increase in energy consumption. Therefore, it is necessary to recover the heat energy in the waste air.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide an energy-saving spray dryer that reduces energy consumption and saves energy.

The technical solution adopted by the utility model is: an energy-saving spray dryer, including a feeding system, an air inlet system, a drying tower, a first cyclone separator, a second cyclone separator, a membrane separator and an induced draft fan;

The feeding system includes a feed tank, a feeding pump and an atomizer connected in sequence through pipelines, and the atomizer is arranged in a drying tower;

The air inlet system includes an air filter, a blower and a heating device connected in sequence through pipelines, and the heating device is connected with the air inlet pipe of the drying tower;

The drying tower also includes a discharge port arranged at the bottom and an air outlet pipe arranged on the side, and the air outlet pipe is sequentially connected to the first cyclone separator, the second cyclone separator and the membrane separator through pipelines. The first cyclone separator, the second cyclone separator and the bottom of the membrane separator are all equipped with outlets;

The exhaust pipe of the membrane separator is connected to the pipeline between the blower and the heater through an induced draft fan.

Preferably, a wind pressure measuring device is installed on the pipeline between the second cyclone separator and the membrane separator.

Preferably, a wind pressure measuring device is installed on the exhaust pipe of the membrane separator.

In the utility model, the air of the mixed fine-grained material discharged from the drying tower is separated by two cyclones, and then completely separated by the membrane separator. The cleanliness of the fresh air contains more heat, and it returns to the pipeline between the blower and the heater to participate in the circulation, so that the heat can be fully utilized, reducing energy consumption and saving energy. The setting of the two cyclone separators can reduce the pressure of the membrane separator, and the air pressure measuring device is installed on the air inlet pipe and the exhaust pipe of the membrane separator to control the air flow into the membrane separator and prevent damage to the membrane separator. damage.

Description of drawings

Fig. 1 is a structural schematic diagram of an energy-saving spray dryer of the present invention.

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

detailed description

Example 1

As shown in Figure 1, the energy-saving spray dryer includes a feeding system, an air inlet system, a drying tower 1, a first cyclone separator 2, a second cyclone separator 3, a membrane separator 4 and an induced draft fan 5;

The feed system includes a feed tank 6, a feed pump 7 and an atomizer 8 connected in sequence through pipelines, and the atomizer 8 is arranged in the drying tower 1;

The air inlet system includes an air filter 9, a blower 10 and a heating device 11 connected in sequence through pipelines, and the heating device 11 is connected to the air inlet pipe of the drying tower 1;

The drying tower 1 also includes a discharge port arranged at the bottom and an air outlet pipe arranged on the side, and the air outlet pipe is sequentially connected to the first cyclone separator 2, the second cyclone separator 3 and the membrane separator 4 through pipelines , the bottom of the first cyclone separator 2, the second cyclone separator 3 and the bottom of the membrane separator 4 are all provided with a discharge port;

The exhaust pipe of the membrane separator 4 is connected to the pipeline between the blower 10 and the heater 11 through the induced draft fan 5, wherein the pipeline between the second cyclone separator 3 and the membrane separator 4 and the membrane The exhaust pipe of separator 4 is equipped with wind pressure measuring device.

When working, the feeding pump sends the liquefied material from the trough into the atomizer and sprays it out. The heated air enters the drying tower and mixes with the mist material. The small particles are mixed with air and discharged from the outlet pipe, and then enter the first cyclone separator and the second cyclone separator for material separation. Most of the materials are discharged from the outlet, and the air still containing a small amount of material particles enters the membrane separation In the membrane separator, the material and air are completely separated, the material is discharged from the outlet, and the air enters the pipeline between the blower and the heater under the action of the induced draft fan, and participates in the cycle again. This energy-saving spray dryer saves energy, has a high degree of material recovery, and is suitable for valuable materials with high dryness requirements.

Claims (3)

1. An energy-saving spray dryer, comprising a feeding system, an air inlet system, a drying tower, a first cyclone separator, a second cyclone separator, a membrane separator and an induced draft fan; The feeding system includes a feed tank, a feeding pump and an atomizer connected in sequence through pipelines, and the atomizer is arranged in a drying tower; The air inlet system includes an air filter, a blower and a heating device connected in sequence through pipelines, and the heating device is connected with the air inlet pipe of the drying tower; The drying tower also includes a discharge port arranged at the bottom and an air outlet pipe arranged on the side, and the air outlet pipe is sequentially connected to the first cyclone separator, the second cyclone separator and the membrane separator through pipelines. The first cyclone separator, the second cyclone separator and the bottom of the membrane separator are all equipped with outlets; It is characterized in that: the exhaust pipe of the membrane separator is connected to the pipeline between the blower fan and the heater through the induced draft fan. 2. The energy-saving spray dryer according to claim 1, characterized in that: a wind pressure measuring device is installed on the pipeline between the second cyclone separator and the membrane separator. 3. The energy-saving spray dryer according to claim 1, characterized in that: a wind pressure measuring device is installed on the exhaust pipe of the membrane separator.