CN201024138Y - Built-in flue type energy-saving and environment-friendly metallurgical lime calcining kiln - Google Patents

Abstract

The utility model is an energy-saving and environment-friendly metallurgical lime calcining kiln with a built-in flue. A built-in chimney (15) is arranged in the inner cavity of the kiln body (2); (8) The annular flue (10) of the flue gas recovery port that communicates; the built-in chimney (15) is a hollow structure, and the upper part is provided with a circulating flue (4), and the lower end passes through the flue gas pipe (12) and the lower induced draft fan (11) is connected with annular flue (10). The flue gas that is not fully burned in the combustion chamber is sent to the lower part of the combustion chamber through the smoke exhaust channel and two flue gas pipes under the action of the induced draft fan to continue burning, and is recycled repeatedly, which not only improves the utilization rate of fuel, but also effectively reduces the environment. degree of pollution.

Description

Built-in flue type energy-saving and environment-friendly metallurgical lime calcining kiln

technical field

The utility model relates to a calcining kiln, in particular to a built-in flue-type energy-saving and environment-friendly metallurgical lime calcining kiln.

Background technique

Most of the existing metallurgical lime calcination kilns or roasting kilns use coal as fuel. Because it is difficult to burn fully, not only will a large amount of black smoke pollute the atmospheric environment, but also the separation of coal slag and ash will reduce the survival efficiency.

Chinese utility model patent CN200520024865.8 discloses a "new environmental protection and energy-saving calcined lime kiln", which uses coal gas as fuel, and preferably solves the above-mentioned problems. But this structure still has incomplete gas combustion, low thermal energy utilization rate, high energy consumption and other deficiencies.

Utility model content

The technical problem to be solved by the utility model is: to provide a built-in flue-type energy-saving and environment-friendly metallurgical lime calcining kiln, which can realize the recovery and recycling of gas through the built-in flue, improve thermal efficiency, reduce fuel cost, reduce air pollution, and improve calcining quality , to overcome the above-mentioned defective of existing products.

The technical solution adopted by the utility model to solve its technical problems is as follows:

An energy-saving and environment-friendly metallurgical lime calcining kiln with a built-in flue, including a kiln body with a hopper at the upper end and a discharge port at the lower end, and a fire inlet opening on the side of the kiln body connected to the gas furnace through a gas pipe and an upper induced draft fan , which is characterized in that: a built-in chimney is arranged in the kiln cavity; an annular flue with several flue gas recovery ports communicating with the combustion chamber is arranged below the fire inlet; the built-in chimney is a hollow structure, and the upper part is provided with Circulating flue, the lower end is connected with the annular flue through the flue gas pipe and the lower induced draft fan.

The built-in chimney is connected with the inner wall of the kiln body through pillars.

There are three layers of fire inlet holes, each layer has several holes.

The upper end of the kiln cavity is hemispherical

There are two sets of flue gas pipes and lower induced draft fans, which are symmetrically arranged on both sides of the kiln body.

The positive effect of the utility model is: (1), in combustion chamber combustion is not enough flue gas, under the effect of induced draft fan, send into the lower part of combustion chamber to continue burning through smoke exhaust channel and two-way flue gas pipe, repeatedly recycles, not only The utilization rate of fuel is improved, and the degree of environmental pollution is effectively reduced. (2) Three layers of fire holes ensure more uniform calcination, better calcination effect and higher quality of finished products. (3) The upper end of the kiln body cavity is hemispherical, and its design effect is unexpectedly good. On the one hand, the material enters more smoothly; on the other hand, the overall pressure capacity of the kiln body is greatly improved; The amount of smoke is very appropriate.

Description of drawings

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

Detailed ways

The utility model is further described below in conjunction with the accompanying drawings and embodiments, but the protection content of the utility model is not limited to the present embodiment.

As shown in Figure 1, this embodiment includes a kiln body 2 with a hopper 1 at the upper end and a discharge port 14 at the lower end. The discharge ports 14 are four evenly distributed front, rear, left and right. The upper end of the inner cavity of the kiln body 2 is hemispherical.

Offer three layers of fire inlets 6 on the side of the kiln body 2, each layer of twelve. The fire inlet hole 6 is respectively connected with two gas furnaces 13 through the gas pipe 9, and two upper induced draft fans 7 are respectively installed on the side of the kiln body 2 through brackets, and the upper induced draft fan 7 provides a mechanism for blowing gas into the inner cavity of the kiln body 2. power.

A built-in chimney 15 is arranged in the inner cavity of the kiln body 2, and its upper end is connected with the inner wall of the kiln body 2 through eight pillars 3 to fix the built-in chimney 15. The cavity between the kiln body 2 and the built-in chimney 15 is a combustion chamber 8 , and calcined raw materials are added from the hopper 1 and fall into the combustion chamber 8 from the gap between the hoppers 1 .

An annular flue 10 is arranged below the fire inlet 6 , and the annular flue 10 has eight flue gas recovery ports communicating with the combustion chamber 8 . The built-in chimney 15 is a hollow structure with a smoke exhaust channel 5 in the middle, four circulating flues 4 are opened on the upper part, and the lower end is connected with the annular flue 10 through two flue gas pipes 12 and two lower induced draft fans 11. The lower induced draft fan 11 provides the power to draw in the flue gas from the upper part of the combustion chamber 8 from the circulating flue 4 and send it to the lower part of the combustion chamber 8 through the smoke exhaust channel 5 and the two-way flue gas pipe 12 .

Claims (5)

1. An energy-saving and environment-friendly metallurgical lime calcining kiln with a built-in flue, comprising a kiln body (2) with a hopper (1) at the upper end and a discharge port (14) at the lower end, and a kiln body (2) on the side of the kiln body (2) The fire inlet hole (6) is connected with the gas stove (13) through the gas pipe (9) and the upper induced draft fan (7), and it is characterized in that: a built-in chimney (15) is arranged in the inner chamber of the kiln body (2); An annular flue (10) with several flue gas recovery ports communicating with the combustion chamber (8) is arranged below the hole (6); the built-in chimney (15) is a hollow structure, and a circulating flue (4 ), the lower end is connected with the annular flue (10) by the flue gas pipe (12) and the lower induced draft fan (11). 2. The built-in flue type energy-saving and environment-friendly metallurgical lime calcining kiln according to claim 1, characterized in that: the built-in chimney (15) is connected to the inner wall of the kiln body (2) through a pillar (3). 3. The built-in flue-type energy-saving and environment-friendly metallurgical lime calcining kiln according to claim 1, characterized in that: the fire inlet (6) has three layers, and each layer has several. 4. The built-in flue type energy-saving and environment-friendly metallurgical lime calcining kiln according to claim 1, 2 or 3, characterized in that: the flue gas pipe (12) and the lower induced draft fan (11) are two sets, arranged symmetrically in the kiln Body (2) both sides. 5. The built-in flue-type energy-saving and environment-friendly metallurgical lime calcining kiln according to claim 1, 2 or 3, characterized in that: the upper end of the inner chamber of the kiln body (2) is hemispherical.

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