CN207850007U - A kind of dry kiln heating system of dry laterite - Google Patents

Abstract

The utility model is related to a kind of dry kiln heating systems of dry laterite, it includes rotary kiln exhaust gas output channel, hot-blast stove, dry kiln, coal dust transfer passage and air-supply passage, the rotary kiln exhaust gas output channel is connected by flow control valve I with hot-blast stove, rotary kiln exhaust gas output channel is equipped with on-line checking channel I, on-line checking channel I is equipped with detection valve I, on-line checking channel I and is equipped with detection thermometric instrument I；The coal dust transfer passage and air-supply passage are communicated with the combustion chamber of hot-blast stove respectively, air-introduced machine I is set on coal dust transfer passage, air-supply passage is equipped with air-introduced machine II, hot-blast stove is communicated by hot blast pipe with dry kiln, the wind pipe of dry kiln is equipped with electrostatic precipitator, and the humidity instrument of detection laterite is equipped in dry kiln；The system saves heat source, reduces cost, fully utilizes thermal energy, reaches energy-saving and environment-friendly purpose.

Description

A heating system for drying kiln for drying laterite ore

technical field

The utility model belongs to the technical field of waste heat utilization, in particular to a heat supply system for a drying kiln for drying laterite ore.

Background technique

In metallurgy, cement and other industries, rotary kiln is widely used as a drying equipment. In the high-temperature section, the surface temperature of the rotary kiln body is above 1000°C. At present, air cooling or water cooling is used to cool down, and a large amount of heat energy is directly emitted into the atmosphere, which not only wastes a lot of heat energy, but also causes high-temperature pollution around the kiln body. .

In the process of industrial production, some raw materials can only be used in the process line after being dried. At present, the following two methods are generally used for drying raw materials: The first method is to expose the raw materials that need to be dried to the sun and use solar energy to dry them. The water in the raw material evaporates to achieve the purpose of drying. However, when the material is dried in this way, it is greatly affected by the weather, the production efficiency is very low, and the production quality cannot be guaranteed; the second method The method is to use a drying kiln to dry the raw materials. The existing drying kiln includes a drying cylinder, a driving device, and a bracket. The drying cylinder is arranged on the bracket, and the driving device is arranged under the drying cylinder. There is a dust collector on the exhaust pipe, and an induced draft fan is installed between the dust collector and the drying cylinder. The other end of the drying cylinder is provided with a feeding port and an air inlet pipe. There is a control valve, a combustion chamber at the end of the intake pipe, and a blower on the combustion chamber. This type of drying kiln generally uses coal, fuel oil or natural gas as the only heat source. Although this type of drying kiln has a high production efficiency, it is , due to the high price of coal, fuel oil or natural gas, the production cost is greatly increased.

In view of the above problems, it is urgent to find a solution.

Utility model content

In order to solve the problems raised by the technical background, the utility model provides a drying kiln heating system for drying laterite ore. The system saves heat sources, reduces costs, fully utilizes heat energy, and achieves the purpose of energy saving and environmental protection.

In order to achieve the above object, the utility model adopts the following technical solutions:

The utility model provides a heating system for a drying kiln for drying laterite ore, which includes a rotary kiln tail gas output channel, a hot blast stove, a drying kiln, a pulverized coal delivery channel and an air supply channel. The rotary kiln tail gas output channel passes through a flow rate of The control valve I is connected with the hot blast stove, the rotary kiln tail gas output channel is provided with an online detection channel I, the online detection channel I is provided with a detection valve I, and the online detection channel I is provided with a detection temperature instrument I; the pulverized coal conveying channel The air supply channel is connected with the combustion chamber of the hot blast stove respectively. The induced draft fan I is arranged on the pulverized coal conveying channel, and the induced draft fan II is arranged on the air supply channel. The hot blast stove communicates with the drying kiln through the hot air pipe, and the air outlet duct of the drying kiln There is an electrostatic precipitator on the top, and a humidity instrument for detecting laterite ore is installed in the drying kiln.

According to the above-mentioned heating system for drying kilns for drying laterite ore, it also includes an electric furnace tail gas channel, which is connected to the hot blast stove through a flow control valve II. There is a detection valve II, and a temperature detection instrument II is installed on the online detection channel II.

According to the above heating system for drying kiln for drying laterite ore, a flue gas cooling device is provided between the air outlet duct of the drying kiln and the electrostatic precipitator.

According to the above heating system for drying kiln for drying laterite ore, the outer wall of the drying kiln is covered with polyurethane insulation layer.

According to the above heating system for drying kiln for drying laterite ore, the drying kiln is provided with an air duct partition, the air duct partition is an arc structure, and the air duct partition is evenly arranged along the inner side wall of the drying kiln.

Compared with the prior art, the utility model has the beneficial effects:

1. The structure of the utility model includes a rotary kiln tail gas output channel, a hot blast stove, a drying kiln, a pulverized coal delivery channel and an air supply channel. The rotary kiln tail gas output channel is connected to the hot blast stove through a flow control valve I, and the rotary kiln tail gas output channel On-line detection channel I is provided with on-line detection channel I, and on-line detection channel I is provided with detection valve I, and on-line detection channel I is provided with detection temperature instrument I; Described pulverized coal delivery channel and air supply channel communicate with the combustion chamber of hot-blast stove respectively, An induced draft fan I is installed on the pulverized coal conveying channel, and an induced draft fan II is installed on the air supply channel. The hot blast stove communicates with the drying kiln through the hot air pipe. Humidity instrument for laterite ore; the rotary kiln exhaust gas output channel in this structure is used to input the exhaust gas in the rotary kiln as a heat source into the hot blast stove, and after being heated, it is further used for drying kiln, line detection channel I and temperature detection instrument I. It is used to detect the exhaust gas temperature in the rotary kiln; the induced draft fan I is used to transport coal powder, and the induced draft fan II is used to input air; the flue gas from the air outlet pipe of the drying kiln is dusted by the electrostatic precipitator; this structure makes full use of the exhaust gas of the rotary kiln Heat energy to achieve the purpose of drying laterite ore.

2. The structure of the utility model also includes an electric furnace tail gas channel, which is connected to the hot blast stove through the flow control valve II. The channel II is equipped with a temperature detection instrument II, and the centerline detection channel II and temperature detection instrument II of this structure are used for the temperature of the electric furnace exhaust gas; a flue gas cooling device is provided between the air outlet pipe of the drying kiln and the electrostatic precipitator, and the flue gas The setting of the cooling device is to avoid the damage of the electrostatic precipitator caused by the high tail gas temperature of the drying kiln and affect the service life of the electrostatic precipitator; the outer wall of the drying kiln is covered with a polyurethane insulation layer, and the design of the polyurethane insulation layer is convenient to reduce the temperature of the drying kiln. The heat in the drying kiln is dissipated; the drying kiln is equipped with an air duct partition, the air duct partition is an arc-shaped structure, and the air duct partition is evenly arranged along the inner side wall of the drying kiln. distribution, to achieve uniform drying of laterite ore.

3. The utility model is simple to operate, economical and practical, and has broad application prospects.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Referring to Fig. 1, the utility model provides a drying kiln heating system for drying laterite ore, which includes a rotary kiln exhaust gas output channel 1, an electric furnace exhaust gas channel 2, a hot blast stove 3, a drying kiln 4, and a pulverized coal delivery channel 5 and the air supply channel 6, the rotary kiln tail gas output channel 1 is connected to the hot blast stove 3 through the flow control valve I7, the rotary kiln tail gas output channel is provided with an online detection channel I8, and the online detection channel I8 is provided with a detection valve I9, The online detection channel I8 is provided with a detection temperature instrument I10; the electric furnace tail gas channel 2 is connected with the hot blast stove 3 through the flow control valve II11, the electric furnace tail gas channel 2 is provided with an online detection channel II12, and the online detection channel II12 is provided with a detection valve II13, the online detection channel II12 is provided with a detection temperature instrument II14; the pulverized coal delivery channel 5 and the air supply channel 6 communicate with the combustion chamber of the hot blast stove 3 respectively, and the induced draft fan I15 is set on the pulverized coal delivery channel 5, and the air supply channel 6 is provided with an induced draft fan II16, and the hot blast stove 3 communicates with the drying kiln 4 through a hot air pipe 17. The outer wall of the drying kiln 4 is covered with a polyurethane insulation layer 18, and the drying kiln is provided with an air duct partition 19, and the air duct partition It is an arc-shaped structure, and the air duct partition 19 is evenly arranged along the inner side wall of the drying kiln 4. The air outlet duct of the drying kiln 4 is provided with an electrostatic precipitator 20. There is a flue gas cooling device 21 in between, and a humidity meter 22 for detecting laterite ore is installed in the drying kiln.

The above is only the preferred embodiment of the utility model, it should be pointed out that for those skilled in the art, without departing from the overall concept of the utility model, some changes and improvements can also be made, and these should also be regarded as Protection scope of the present utility model.

Claims (5)

1. a kind of dry kiln heating system of dry laterite, it is characterised in that it includes rotary kiln exhaust gas output channel, heat Wind furnace, dry kiln, coal dust transfer passage and air-supply passage, the rotary kiln exhaust gas output channel pass through flow control valve I and heat Wind furnace is connected, and rotary kiln exhaust gas output channel is equipped with on-line checking channel I, and on-line checking channel I is equipped with detection valve I, Line sense channel I is equipped with detection thermometric instrument I；The coal dust transfer passage and air-supply passage respectively with the combustion chamber of hot-blast stove It communicates, air-introduced machine I is set on coal dust transfer passage, air-supply passage is equipped with air-introduced machine II, and hot-blast stove passes through hot blast pipe and dry kiln It communicates, the wind pipe of dry kiln is equipped with electrostatic precipitator, and the humidity instrument of detection laterite is equipped in dry kiln.

2. the dry kiln heating system of dry laterite according to claim 1, it is characterised in that：It further include electric furnace tail Gas channel, tail gas from electric furnace channel are connected by flow control valve II with hot-blast stove, and tail gas from electric furnace channel is logical equipped with on-line checking Road II, on-line checking channel II are equipped with detection valve II, on-line checking channel II and are equipped with detection thermometer Table II.

3. the dry kiln heating system of dry laterite according to claim 1, it is characterised in that：The dry kiln Smoke temperature reducer is equipped between wind pipe and electrostatic precipitator.

4. the dry kiln heating system of dry laterite according to claim 1, it is characterised in that：The dry kiln Outer wall is coated with polyurethane insulation coating.

5. the dry kiln heating system of dry laterite according to claim 1, it is characterised in that：In the dry kiln Equipped with air-duct clapboard, air-duct clapboard is arcuate structure, and air-duct clapboard is uniformly arranged along the madial wall of dry kiln.