CN204923788U - A device for carbon element raw materials is dried - Google Patents

Abstract

The utility model discloses a device for carbon element raw materials is dried, including limekiln, gas collection cabinet, heat exchanger, steam pipe, drying kiln, dust remover, fan and the chimney of discharging fume, the limekiln gas outlet links to each other with gas collection cabinet air inlet, gas collection cabinet gas outlet links to each other with the heat exchanger air inlet, be provided with the steam pipe on the heat exchanger, the steam pipe is fixed on the inner wall of heat exchanger, the heat exchanger gas outlet links to each other with the drying kiln air inlet, the drying kiln gas outlet links to each other with the dust remover air inlet, the dust remover gas outlet links to each other with fan air inlet, fan air outlet links to each other with the chimney air inlet of discharging fume. The utility model discloses an use vapor heat exchanger originally dumped limekiln tail gas get up with the steam utilization, utilize waste heat between them as the stoving heat source, abandon the mode that in the past adopted coal -fired conduct heat source in the trade to reach and reduce energy consumption, the emission of pollution abatement thing, reduce carbide manufacturing cost's purpose.

Description

A device for drying carbon raw materials

technical field

The utility model relates to the technical field of calcium carbide processing, in particular to a device for drying carbon raw materials.

Background technique

With the development of calcium carbide production technology, the production scale of calcium carbide equipment has gradually expanded, and the key equipment calcium carbide furnace has become larger and larger, and the carbon raw materials required for the production of calcium carbide have increased. At present, the production of calcium carbide is carried out with closed calcium carbide furnace equipment. To meet the requirements of calcium carbide production process, the carbon raw material used in the calcium carbide industry needs to control its moisture content below 1%, so the drying amount of carbon raw material increases and the energy consumption Increase, the production cost of calcium carbide increases. In the prior art, gas and coal are mainly used to dry carbon raw materials. After fuel is added to the hot stove and fully burned, the hot air is sent into the drying device by the fan for drying. The large amount of fuel required will increase the cost of calcium carbide production and operation. At the same time, the tail gas of the fuel contains a large amount of dust and sulfur dioxide, which will cause serious pollution to the environment. Therefore, it is necessary to design a low-energy consumption and no pollutant emission. dry device.

Contents of the invention

In view of the above problems, the utility model provides a device for drying carbon raw materials.

The utility model is realized through the following technical solutions:

A device for drying carbon raw materials, comprising a lime kiln, a gas collection cabinet, a heat exchanger, a steam pipe, a drying kiln, a dust collector, a fan and a chimney, the gas outlet of the lime kiln is connected to the gas collection cabinet The gas outlet is connected, the gas outlet of the gas collection cabinet is connected with the inlet of the heat exchanger, the heat exchanger is provided with a steam pipe, the steam pipe is fixed on the inner wall of the heat exchanger, and the outlet of the heat exchanger The air port is connected to the air inlet of the drying kiln, the air outlet of the drying kiln is connected to the air inlet of the dust collector, the air outlet of the dust collector is connected to the air inlet of the fan, and the air outlet of the fan is connected to the air inlet of the chimney .

The drying kiln is provided with a humidity sensor.

A pressure sensor is arranged on the inner wall of the lime kiln.

A check valve is arranged at the air inlet of the gas collecting cabinet.

The beneficial effects of the utility model are:

The utility model utilizes the waste lime kiln tail gas and steam by using a steam heat exchanger, uses the waste heat of the two as a drying heat source, and abandons the previous method of using coal as a heat source in the industry, thereby reducing energy consumption and The purpose of pollutant discharge and reducing the production cost of calcium carbide.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1-pressure sensor, 2-lime kiln, 3-gas collector, 4-heat exchanger, 5-humidity sensor, 6-dust collector, 7-exhaust chimney, 8-fan, 9-drying kiln, 10-steam pipe, 11-check valve.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings, but the scope of protection is not limited to the description.

As shown in Figure 1, a device for drying carbon raw materials includes a lime kiln 2, a gas collecting cabinet 3, a heat exchanger 4, a steam pipe 10, a drying kiln 9, a dust collector 6, a fan 8 and an exhaust Chimney 7, the gas outlet of the lime kiln 2 is connected to the air inlet of the gas collecting cabinet 3, the gas outlet of the gas collecting cabinet 3 is connected to the air inlet of the heat exchanger 4, and the heat exchanger 4 is provided with a steam pipe 10 , the steam pipe 10 is fixed on the inner wall of the heat exchanger 4, the steam pipe 10 is fixed on the inner wall of the heat exchanger 4, the gas outlet of the heat exchanger 4 is connected with the air inlet of the drying kiln 9, and the The air outlet of the drying kiln 9 is connected with the air inlet of the dust collector 6 , the air outlet of the dust collector 6 is connected with the air inlet of the fan 8 , and the air outlet of the fan 8 is connected with the air inlet of the chimney 7 .

Lime kiln 2 is used to produce lime. Lime is usually obtained by heating at high temperature. At the same time, lime is powdery and will be scattered around with the air flow. Therefore, the tail gas of lime kiln 2 has a great impact on the environment and is easy to cause dust pollution. The tail gas of lime kiln 2 has a high temperature and contains a lot of waste heat. In order to avoid discharging the tail gas of lime kiln 2 directly into the air, and at the same time use the waste heat in the tail gas of lime kiln 2 to introduce the tail gas of lime kiln 2 into the gas collector through the insulation pipe 3 in. In order to control the pressure in the lime kiln 2 conveniently, a pressure sensor 1 is arranged on the inner wall of the lime kiln 2 to feed back the pressure value in the lime kiln 2 to the control system.

The main function of the gas collecting cabinet 3 is to collect the tail gas produced in the lime kiln 2. In order to facilitate the removal of dust in the tail gas of the lime kiln 2, the air inlet of the gas collecting cabinet 3 is set at the top, and the corresponding gas outlet is set at the bottom. In order to prevent gas backflow, a check valve 11 is installed at the air inlet of the gas collecting cabinet 3. When the pressure in the gas collecting cabinet 3 decreases, the tail gas produced by the lime kiln 2 enters the gas collecting cabinet 3.

The air inlet of the heat exchanger 4 is connected with the gas outlet of the gas collecting cabinet 3, and the function of the heat exchanger 4 is to further heat the tail gas of the lime kiln 2. A steam pipe 10 is arranged on the inner wall of the heat exchanger 4, and the external steam enters the heat exchanger 4 through the steam pipe 10 to heat the heat exchanger 4, and the temperature of the heated steam decreases and gradually condenses to form water, which can be heated in a cycle , It can also be used as industrial water to enter other water links.

The air inlet of the drying kiln 9 is connected to the air outlet of the heat exchanger 4, and negative pressure is generated at the air outlet of the drying kiln 9 when the fan 8 is running, and the tail gas of the lime kiln 2 flows to the air outlet, and during the flow, the lime The tail gas of kiln 2 passes through the carbon raw material, and takes away the moisture in the carbon raw material, so as to achieve the purpose of drying. In order to further control the moisture content in the carbon raw material, a humidity sensor 5 is provided on the inner wall of the drying kiln 9 for feeding back the humidity value in the drying kiln 9 to the control system.

The air outlet of the drying kiln 9 is connected with the air inlet of the dust collector 6, the humidity of the tail gas of the lime kiln 2 after passing through the drying kiln 9 increases, the temperature decreases, and the dust substances contained in the tail gas of the lime kiln 2 begin to agglomerate, As the weight increases, the flying distance decreases under the influence of gravity. When passing through the dust collector 6, the dust collector 6 removes the dust in the tail gas of the lime kiln 2.

The air inlet of the fan 8 is connected to the air outlet of the dust collector 6, and the air outlet of the fan 8 is connected to the air inlet of the chimney 7, and the fan 8 generates negative pressure at the air inlet, thereby guiding the tail gas of the lime kiln 2 to the fan 8. The air port moves, and the heating, drying, and dedusting processes are completed during the movement. The fan 8 simultaneously pressurizes the tail gas of the lime kiln 2 after dedusting, and discharges it through the chimney 7.

Claims (4)

1. A device for drying carbon raw materials, comprising a lime kiln (2), a gas collector (3), a heat exchanger (4), a drying kiln (9), a dust collector (6), a fan ( 8) and a chimney (7), characterized in that: the gas outlet of the lime kiln (2) is connected to the air inlet of the gas collecting cabinet (3), and the gas outlet of the gas collecting cabinet (3) is connected to the heat exchanger (4) ) air inlet is connected, the heat exchanger (4) is provided with a steam pipe (10), and the steam pipe (10) is fixed on the inner wall of the heat exchanger (4), and the heat exchanger (4) The air outlet is connected to the air inlet of the drying kiln (9), the air outlet of the drying kiln (9) is connected to the air inlet of the dust collector (6), and the air outlet of the dust collector (6) is connected to the air inlet of the fan (8). The air port is connected, and the air outlet of the fan (8) is connected with the air inlet of the chimney (7). 2. A device for drying carbon raw materials according to claim 1, characterized in that: said drying kiln (9) is provided with a humidity sensor (5). 3. A device for drying carbon raw materials according to claim 1, characterized in that a pressure sensor (1) is arranged on the inner wall of the lime kiln (2). 4. A device for drying carbon raw materials according to claim 1, characterized in that: a check valve (11) is provided at the air inlet of the gas collecting cabinet (3).