CN103397179B - A high temperature mineral powder cooling device - Google Patents

Abstract

A high-temperature mineral powder cooling device belongs to the technical field of iron and steel metallurgy. The invention comprises a volute case and a cooling center cylinder, the volute case is arranged on the upper end of the cooling center cylinder; the volute case comprises a volute and a center case, the center case of the volute case is a cylindrical structure with an opening at the lower end, and A feed pipe is installed at the center of the top of the volute; the volute of the volute is the air outlet; the cooling center cylinder is a cylindrical structure with a through hole in the center, and a cooling spiral is arranged in the center through hole of the cooling center cylinder. Water pipe, the discharge end of the feed pipe is located above the cooling spiral water pipe; the upper end of the cooling spiral water pipe communicates with the cooling water outlet through the wall of the cooling center cylinder, and the lower end of the cooling spiral water pipe passes through the wall of the cooling center cylinder and the cooling The water inlet is connected; the air inlet is arranged on the wall of the lower end of the cooling central cylinder; the opening of the lower end of the cooling central cylinder is connected with the large mouth of the conical cylinder arranged below it, and the small mouth of the conical cylinder is the discharge port.

Description

A high temperature mineral powder cooling device

technical field

The invention belongs to the technical field of iron and steel metallurgy, in particular to a high-temperature ore powder cooling device.

Background technique

At present, for the refractory iron ore in my country, the high-temperature calcined sand formed after the magnetization reduction roasting is directly discharged into the circulating cooling water for cooling. This method causes part of the waste heat that cannot be recycled, and in the cooling process A part of circulating cooling water will be wasted in the process.

Under normal circumstances, for every ton of refractory iron ore processed, there will be heat equivalent to 15-25 kg of standard coal that cannot be recycled, and about 30-70 kg of circulating cooling will be lost during the process. water.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a high-temperature mineral powder cooling device which can recycle waste heat and save cooling water.

In order to achieve the above object, the present invention adopts the following technical solutions: a high-temperature mineral powder cooling device, including a volute case and a cooling center cylinder, the volute case is arranged on the upper end of the cooling center cylinder, and the two are sealed and fixed; the volute The casing includes a volute and a central casing. The central casing of the volute is a cylindrical structure with an opening at the lower end, and a feed pipe is installed at the center of the top of the volute; the volute of the volute is air outlet;

The cooling central cylinder is a cylindrical structure with a through hole in the center, and a cooling spiral water pipe is arranged in the central through hole of the cooling central cylinder, and the discharge end of the feeding pipe is located above the cooling spiral water pipe; The upper end of the cooling spiral water pipe communicates with the cooling water outlet through the cylinder wall of the cooling central cylinder, and the lower end of the cooling spiral water pipe communicates with the cooling water inlet through the cylinder wall of the cooling central cylinder; the cylinder wall at the lower end of the cooling central cylinder There is an air inlet on the top;

The opening at the lower end of the central cooling cylinder communicates with the large opening of the conical cylinder below it, and the small opening of the conical cylinder is set downward; the small opening of the conical cylinder is the discharge port.

The taper of the conical barrel is 60°-70°.

The volute case, the cooling center cylinder and the conical cylinder are all provided with linings, and the linings are made of high-temperature-resistant fireproof materials.

The volute case is sealed and fixed to the cooling center cylinder through a flange plate, and the flange plate is made of steel.

A temperature detector is arranged on the wall of the upper end of the cooling center cylinder close to the volute, and the temperature detector adopts a thermal resistance or a thermocouple.

A material distributing port is provided at the discharge end of the feed pipe, and the material distributing port is configured as an inverted tapered structure.

Beneficial effects of the present invention:

When the present invention cools the high-temperature mineral powder, the high-temperature mineral powder does not directly contact with the cooling water, which avoids a large amount of evaporation loss of the cooling water. Compared with the traditional cooling method, the cooling water can be saved by about 10% to 30%; The medium-temperature gas discharged from the air outlet of the present invention can be used in the roasting furnace to play a combustion-supporting role, and the waste heat can be recovered by 20% to 55%; The cooling water is in contact with each other, so that the high-temperature mineral powder will not be mixed with other impurities after cooling, and the optional types of high-temperature mineral powder are wider.

Description of drawings

Fig. 1 is a kind of high temperature slag powder cooling device structural representation of the present invention;

Fig. 2 is A-A sectional view among Fig. 1;

In the figure, 1—volute case, 2—cooling center cylinder, 3—conical cylinder, 4—inner lining, 5—feeding pipe, 6—distributing port, 7—cooling spiral water pipe, 8—cooling water inlet, 9—cooling water outlet, 10—snail mouth, 11—flange plate, 12—temperature detector, 13—air inlet, 14—material outlet, 15—air outlet.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 and 2, a high-temperature mineral powder cooling device includes a volute case 1 and a cooling center cylinder 2, the volute case 1 is arranged on the upper end of the cooling center cylinder 2, and the two are sealed and fixed; the volute Housing 1 comprises volute 10 and central housing, and the central housing of volute housing 1 is the cylindrical cylindrical structure that lower end has opening, and feed pipe 5 is installed at the top center of volute housing 1; Said volute housing The volute 10 of the body 1 is the air outlet 15;

The cooling central cylinder 2 is a cylindrical structure with a through hole in the center, and a cooling spiral water pipe 7 is arranged in the central through hole of the cooling central cylinder 2, and the discharge end of the feeding pipe 5 is located at the cooling spiral water pipe 7 above; the upper end of the cooling spiral water pipe 7 communicates with the cooling water outlet 9 through the wall of the cooling center cylinder 2, and the lower end of the cooling spiral water pipe 7 communicates with the cooling water inlet 8 through the cylinder wall of the cooling center cylinder 2 ; An air inlet 13 is provided on the cylinder wall at the lower end of the cooling center cylinder 2;

The opening at the lower end of the cooling central cylinder 2 communicates with the large opening of the conical cylinder 3 arranged below it, and the small opening of the conical cylinder 3 is set downward; the small opening of the conical cylinder 3 is the discharge port 14 .

The taper of the conical barrel 3 is 60°.

Inside the volute case 1 , the cooling center cylinder 2 and the conical cylinder 3 are all provided with an inner lining 4 , and the inner lining 4 is made of high temperature resistant fireproof material.

The volute case 1 and the cooling center cylinder 2 are sealed and fixed through the flange plate 11, and the flange plate 11 is made of steel material.

A temperature detector 12 is arranged on the wall of the upper end of the cooling center cylinder 2 close to the volute case 1, and the temperature detector 12 adopts a thermal resistance.

A distributing port 6 is arranged at the discharge end of the feeding pipe 5, and the distributing port 6 is arranged in an inverted tapered structure.

Below in conjunction with accompanying drawing, the one-time use process of the present invention is illustrated:

In this embodiment, the high-temperature ore powder to be cooled is the iron ore powder just after magnetization reduction roasting.

Before cooling the high-temperature mineral powder, first open the cooling water inlet 8 and the cooling water outlet 9, so that the cooling water with a water temperature of about 30°C to 32°C enters the cooling spiral water pipe 7, and at the same time opens the air inlet 13 to make the cold air It is discharged into the cooling center cylinder 2, and the negative pressure is connected to the air outlet 15 of the volute case 1, so that the cold air can run upwards stably; It is evenly distributed into the cooling center tube 2 through the distribution port 6. Under the action of cold air, the high-temperature mineral powder will fall downward at a certain speed. During the falling process of the high-temperature mineral powder, it will continuously contact the cooling spiral water pipe 7 and The cold air performs heat exchange until the high-temperature mineral powder falls into the conical cylinder 3. After the heat exchange process is completed, the high-temperature mineral powder will be discharged from the discharge port 14, and the cooling of the high-temperature mineral powder is completed at this time.

In the process of cooling high-temperature slag powder, the temperature of the heat-exchanged gas that is about to be discharged in the cooling center tube 2 can be observed in real time through the temperature detector 12, and the air intake of the air inlet 13 and the cooling water intake can be adjusted in good time according to the temperature. The water intake of the water outlet 8 realizes the adjustment of the cooling temperature of the high-temperature mineral powder; in this embodiment, the water temperature of the cooling water outlet 9 can reach 48°C-50°C, and the gas temperature of the air outlet 15 can reach 200°C-240°C , and the gas discharged from the air outlet 15 can be used in the roasting furnace again, and plays a combustion-supporting role for the roasting of the roasting furnace, so that 20% to 55% of waste heat can be recovered.

The device of the present invention can not only efficiently cool the iron ore powder in this embodiment, but also can be used for cooling calcined cement, calcined high-temperature alumina powder, and the like.

Claims (5)

1. A high-temperature slag cooling device is characterized in that: it comprises a volute case and a cooling center cylinder, and the volute case is arranged on the upper end of the cooling center cylinder, and the two are sealed and solidly connected; the volute case comprises a volute and a The central casing, the central casing of the volute is a cylindrical structure with an opening at the lower end, and a feed pipe is installed at the center of the top of the volute; the volute of the volute is an air outlet; The cooling central cylinder is a cylindrical structure with a through hole in the center, and a cooling spiral water pipe is arranged in the central through hole of the cooling central cylinder, and the discharge end of the feeding pipe is located above the cooling spiral water pipe; The upper end of the cooling spiral water pipe communicates with the cooling water outlet through the cylinder wall of the cooling central cylinder, and the lower end of the cooling spiral water pipe communicates with the cooling water inlet through the cylinder wall of the cooling central cylinder; the cylinder wall at the lower end of the cooling central cylinder There is an air inlet on the top; The opening at the lower end of the cooling central cylinder communicates with the large mouth of the conical cylinder arranged below it, and the small opening of the conical cylinder is set downward; the small opening of the conical cylinder is the discharge port; The discharge end is provided with a distributing port, and the distributing port is set in an inverted tapered structure. 2. A high-temperature mineral powder cooling device according to claim 1, characterized in that: the taper of the conical cylinder is 60°-70°. 3. A high-temperature mineral powder cooling device according to claim 1, characterized in that: a lining is provided in the volute casing, the cooling center cylinder and the conical cylinder, and the lining is made of high-temperature resistant fireproof material . 4. A high-temperature mineral powder cooling device according to claim 1, characterized in that: the volute casing and the cooling center cylinder are sealed and fixed through flange plates, and the flange plates are made of steel. 5. A high-temperature mineral powder cooling device according to claim 1, characterized in that: a temperature detector is arranged on the wall of the upper end of the cooling center cylinder close to the volute, and the temperature detector adopts a thermal resistance or a thermoelectric I.