CN213708228U

CN213708228U - Dry quenching furnace

Info

Publication number: CN213708228U
Application number: CN202022687145.7U
Authority: CN
Inventors: 田文楠
Original assignee: Sinosteel Engineering Design & Research Institute Co ltd
Current assignee: Sinosteel Engineering Design & Research Institute Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-07-16
Anticipated expiration: 2030-11-19

Abstract

The utility model discloses a dry quenching furnace, dry quenching furnace includes dry quenching furnace body and installs the charging devices of dry quenching furnace body furnace mouth department, the upper end of dry quenching furnace body lateral wall is equipped with blows the entry, it is equipped with first valve to blow in mouth department, blow in the entry be used for to blow in the dry quenching furnace this internal burnt powder. Therefore, coke powder can be blown into the coke dry quenching furnace body immediately before or after the mouth of the coke dry quenching furnace body is opened, the coke powder can be contacted with oxygen entering the coke dry quenching furnace body and can rapidly generate oxidation reaction, the reaction of red coke falling into the coke dry quenching furnace body and the oxygen entering the coke dry quenching furnace body is reduced, and the loss of the red coke in the coke quenching process in the coke dry quenching furnace body is reduced.

Description

Dry quenching furnace

Technical Field

The utility model belongs to coke preparation field especially relates to a dry quenching stove.

Background

In the dry quenching process, coke is burnt to different degrees, and the lower burning rate means that the yield of the coke is higher and the quality is better, so that the reduction of the burning rate of the coke is particularly necessary.

The dry quenching coke burning loss rate is influenced by the following main factors:

1. air leaks into the negative pressure section of the coke quenching furnace;

2. blowing the furnace cover to suck air;

3. introducing air into the annular flue;

4. introducing nitrogen into the reactor;

5. the influence of the air-to-fuel ratio.

The current scheme measures for reducing coke burning loss are as follows:

increasing the gas tightness of the circulating gas system: the method mainly aims at points which are easy to leak air in the system to carry out inspection, and enhances the inspection strength;

the air introduction amount is appropriately reduced: the air introduction amount is determined according to combustible components CO and H in the circulating gas₂Regulated, and the degree of maturity of red coke is determinative of CO and H₂The key of the content;

controlling the pressure of a prestoring section (the upper section of the coke dry quenching furnace body): the pre-storage section pressure is controlled to be about-50 Pa, so that the suction air quantity is not excessive;

reasonably controlling the air-material ratio (the circulating inert gas air quantity required by the complete dry quenching of 1t of red coke in the dry quenching furnace): the air-material ratio is too low, the coke discharging temperature is too high, and the coke burning loss rate is increased;

although the method for controlling the coke burning loss rate in the current production process can reduce the coke burning loss to a certain extent, the method is limited in the capacity of controlling the coke burning loss rate under the condition of a dry quenching process system. According to the existing method for controlling the coke burning loss rate, even if the content of combustible gas of a coke quenching system reaches the standard and the air-fuel ratio is reasonably controlled, coke burning loss still exists because problems such as inflow of air caused by opening a furnace cover, fluctuation of pre-storage section pressure, system tightness and the like all exist objectively, wherein the opening of the furnace cover is an indispensable process step which causes air inflow to be more inevitable.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims to provide a dry quenching furnace which can blow coke powder into a dry quenching furnace body to react with air when a furnace cover is opened.

In order to achieve the above purpose, the technical solution of the present invention is as follows: the dry quenching furnace comprises a dry quenching furnace body and a charging device arranged at a furnace mouth of the dry quenching furnace body, wherein a blowing inlet is formed in the upper end of the side wall of the dry quenching furnace body, a first valve is arranged at the blowing inlet, and the blowing inlet is used for blowing coke powder into the dry quenching furnace body.

The beneficial effects of the above technical scheme are that: therefore, coke powder can be blown into the coke dry quenching furnace body before or after the charging device opens the mouth of the coke dry quenching furnace body, and the coke powder can react with oxygen entering the coke dry quenching furnace body, so that the reaction of red coke falling into the coke dry quenching furnace body and oxygen entering the coke dry quenching furnace body is reduced, and the loss of the red coke in the coke quenching process in the coke dry quenching furnace body is reduced.

Still include the fine coke hold up tank and jetting device among the above-mentioned technical scheme, the fine coke hold up tank lower extreme has the discharge gate, and its discharge gate with the feed inlet intercommunication of jetting device, the discharge gate of jetting device with the blowing opening intercommunication.

The beneficial effects of the above technical scheme are that: therefore, the whole dry quenching furnace is higher in integration and more sensitive in operation.

In the technical scheme, the blowing device is a powder ejector.

The beneficial effects of the above technical scheme are that: the structure is simple and the cost is low.

In the technical scheme, the blowing inlet extends to a pre-storage chamber close to the upper part in the body of the dry quenching furnace.

The beneficial effects of the above technical scheme are that: therefore, the coke powder sprayed into the coke dry quenching furnace body is fully dispersed in the pre-storage chamber of the coke dry quenching furnace body so as to be fully contacted with the oxygen entering the coke dry quenching furnace body and generate oxidation reaction.

The coke tank charging device comprises a charging device, a first valve and a blowing device, wherein the charging device is used for charging coke tanks, the charging device is used for.

The beneficial effects of the above technical scheme are that: therefore, the automation degree of the whole dry quenching furnace is higher, the labor cost is saved, and the operation is safer.

Drawings

FIG. 1 is a schematic view of a dry quenching furnace according to an embodiment of the present invention.

In the figure: 1 dry quenching furnace body, 11 charging devices, 12 blowing inlets, 121 first valves, 2 coke powder storage tanks, 3 blowing devices and 4 coke tanks.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example 1

As shown in fig. 1, the embodiment provides a dry quenching furnace, which includes a dry quenching furnace body 1 and a charging device 11 installed at a mouth of the dry quenching furnace body 1, wherein a blowing inlet 12 is provided at an upper end of a side wall of the dry quenching furnace body 1, a first valve 121 is provided at the blowing inlet 12, and the blowing inlet 12 is used for blowing coke powder into the dry quenching furnace body 1. Therefore, coke powder can be blown into the dry quenching furnace body before or after the furnace cover is opened, and the coke powder can react with oxygen entering the dry quenching furnace body, so that red coke (red hot coke, coke with the temperature of 1000 +/-50 ℃) falling into the dry quenching furnace body is reduced to react with the oxygen entering the dry quenching furnace body, and the loss of the red coke in the coke quenching process in the dry quenching furnace body is reduced.

Still include among the above-mentioned technical scheme fine coke hold up tank 2 and jetting device 3, fine coke hold up tank 2 lower extreme has the discharge gate, and its discharge gate with the feed inlet intercommunication of jetting device 3, the discharge gate of jetting device 3 with blow into mouth 12 intercommunication, so make whole dry coke quenching stove integrate higher, the operation is more sensitive simultaneously.

In the technical scheme, the injection device 3 is a powder injector, and has simple structure and low cost.

In the technical scheme, the blowing inlet 12 extends to a pre-storage chamber close to the upper part in the dry quenching furnace body 1, so that the coke powder sprayed into the dry quenching furnace body is fully dispersed in the pre-storage chamber of the dry quenching furnace body to fully contact with oxygen entering the dry quenching furnace body and carry out oxidation reaction.

The technical scheme includes that the coke dry quenching furnace further comprises a control system, a sitting induction device is arranged on the upper portion of the charging device 11 and used for inducing whether the coke tank 4 is in a sitting position on the upper portion of the charging device 11 or not, the first valve 121 is a control valve, and the sitting induction device, the first valve (121) and the blowing device 3 are all electrically connected with the control system, so that the automation degree of the whole coke dry quenching furnace is higher, the labor cost is saved, and the coke dry quenching furnace is safer to operate.

The charging device 11 is improved on the basis of the prior art in that a rotary material distribution device for distributing materials uniformly is arranged in the charging device (so that red coke falling into a coke dry quenching furnace body can be fully contacted with coke powder sprayed by a spraying device), an automatic furnace cover for opening or closing a furnace opening is arranged in the charging device, and a driving device of the automatic furnace cover is also electrically connected with the control system so as to control the automatic furnace cover to open or close the furnace opening by the control system.

The powder ejector is characterized in that nitrogen with certain pressure is introduced into an air inlet of the powder ejector during working, a feed inlet of the powder ejector is communicated with a discharge outlet of the coke powder storage tank, a second valve is arranged at the air inlet of the powder ejector and is a control valve, the powder ejector is electrically connected with the control system through the second valve on the powder ejector, and the control system controls the second valve to be opened under the premise that the first valve is opened, so that coke powder can be ejected through the powder ejector.

Example 2

This example provides a method of preparing a dry quenched coke using the dry quenched coke oven of example 1, comprising the steps of:

step 1: transporting the mature roasted red coke pushed out of the coke oven to the top of the dry quenching oven body 1 through a coke tank 4;

step 2, starting a charging device 11, opening a furnace mouth of a dry quenching furnace body 1, then opening the first valve 121 and opening a blowing device 3 to blow coke powder into the dry quenching furnace body 1, after the furnace mouth of the dry quenching furnace body 1 is completely opened, seating the coke tank 4 downwards on the charging device 11, after seating the coke tank 4 in place, automatically opening a bottom door of the coke tank, and dropping red coke in the coke tank 4 from the furnace mouth of the dry quenching furnace body 1 into the dry quenching furnace body 1 through the charging device 11;

step 3, after the red coke in the coke tank 4 is completely blanked, lifting the coke tank 4 to a standby position, starting to close the mouth of the dry quenching furnace body 1 by the charging device 11, and after the mouth of the dry quenching furnace body 1 is completely closed, closing the blowing device 3 and closing the first valve 121 to stop blowing the coke powder into the dry quenching furnace body 1;

and 4, repeating the operations of the step 1, the step 2 and the step 3 in sequence after the red coke of the next batch of the coke oven is mature. In this way, when red coke is loaded into the dry quenching furnace body (before the furnace mouth is opened) each time, coke powder is blown into the dry quenching furnace body to protect the red coke loaded into the dry quenching furnace body, namely, the coke powder rises in temperature under the action of the red coke and generates oxidation reaction with oxygen entering the dry quenching furnace body, thereby reducing the probability of the reaction between the oxygen entering the dry quenching furnace body and the red coke and reducing the loss of the red coke.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The dry quenching furnace is characterized by comprising a dry quenching furnace body (1) and a charging device (11) arranged at a furnace mouth of the dry quenching furnace body (1), wherein a blowing inlet (12) is formed in the upper end of the side wall of the dry quenching furnace body (1), a first valve (121) is arranged at the blowing inlet (12), and the blowing inlet (12) is used for blowing coke powder into the dry quenching furnace body (1).

2. The coke dry quenching furnace according to claim 1, further comprising a coke powder storage tank (2) and an injection device (3), wherein the lower end of the coke powder storage tank (2) is provided with a discharge port, the discharge port is communicated with the feed port of the injection device (3), and the discharge port of the injection device (3) is communicated with the injection port (12).

3. The coke dry quenching oven according to claim 2, characterized in that the injection device (3) is a powder injector.

4. The dry quenching oven according to any of the claims 1 to 3, characterized in that the blow-in opening (12) extends into a pre-storage chamber near the upper part in the dry quenching oven body (1).

5. The dry quenching oven according to claim 4, characterized in that it further comprises a control system, the upper part of the charging device (11) having a seating sensing device to sense whether the coke drum (4) is seated in place on the upper part of the charging device (11), the first valve (121) being a control valve, the seating sensing device, the first valve (121) and the blowing device (3) all being electrically connected to the control system.