Dry quenching coke oven and method for preparing dry quenching coke using the same

Abstract

The present invention discloses a dry quenching coke oven and a method for preparing dry quenched coke using the same. The dry quenching coke oven comprises a dry quenching coke oven body and a charging device installed at the furnace mouth of the dry quenching coke oven body. The upper end of the side wall of the dry quenching coke oven body is provided with a blowing inlet, and the blowing inlet is provided with a first valve. The blowing inlet is used to blow coke powder into the dry quenching coke oven body. In this way, coke powder can be blown into the dry quenching coke oven body immediately before or after the furnace mouth of the dry quenching coke oven body is opened, so that the coke powder can contact with the oxygen entering the dry quenching coke oven body and quickly undergo an oxidation reaction, thereby reducing the reaction of red coke falling into the dry quenching coke oven body with the oxygen entering the dry quenching coke oven body, thereby reducing the loss of red coke during the quenching process in the dry quenching coke oven body.

Description

Technical Field

[0001] The invention belongs to the field of coke preparation, and in particular relates to a dry quenching coke oven and a method for preparing dry quenched coke using the same. Background Art

[0002] During the dry quenching process, the coke will be burned to varying degrees. The lower the burn rate, the higher the coke output and the better the quality. Therefore, it is particularly necessary to reduce the burn rate of coke.

[0003] Several main factors affecting the CDQ coke loss rate:

[0004] 1. Air leaks into the negative pressure section of the coke quenching oven;

[0005] 2. Open the furnace cover to inhale air;

[0006] 3. Introduce air into the annular flue;

[0007] 4. Introduce oxygen into nitrogen;

[0008] 5. Influence of air-to-material ratio.

[0009] Current solutions and measures to reduce coke burning loss:

[0010] Improve the air tightness of the circulating gas system: mainly check the points in the system where air is easily leaked, and strengthen inspection efforts;

[0011] Appropriately reduce the amount of air introduced: the amount of air introduced is regulated according to the combustible components CO and H2 in the circulating gas, and the maturity of the red coke is the key to determining the content of CO and H2;

[0012] Control the pressure of the pre-storage section (the upper section of the CDQ coke oven body): the pressure of the pre-storage section is controlled at about -50Pa to ensure that the amount of air inhaled is not too much;

[0013] Reasonable control of the air-to-material ratio (the amount of circulating inert gas required for the CDQ furnace to completely dry-quench 1 t of red coke): if the air-to-material ratio is too low, the coke discharge temperature will be too high, and the coke burning rate will increase;

[0014] The above are the methods for controlling the coke burning rate in the current production process. Although the coke burning rate can be reduced to a certain extent, they are all controlling the conditions of the dry coke quenching process system itself, and the ability to reduce the coke burning rate is limited. According to the existing methods for controlling the coke burning rate, even if the combustible gas content of the coke quenching system meets the standard and the air-to-material ratio is reasonably controlled, there will still be coke burning, because problems such as the opening of the furnace cover causing air to flow in, the fluctuation of the pre-storage section pressure, and the system sealing are objectively existing. Among them, opening the furnace cover is an indispensable process step, and the air inflow is inevitable. Summary of the invention

[0015] In order to solve the above technical problems, one of the objectives of the present invention is to provide a dry quenching coke oven which can blow coke powder into the dry quenching coke oven body to react with air when the oven cover is opened.

[0016] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a dry quenching coke oven, comprising a dry quenching coke oven body and a charging device installed at the oven mouth of the dry quenching coke oven body, a blowing inlet is provided at the upper end of the side wall of the dry quenching coke oven body, a first valve is provided at the blowing inlet, and the blowing inlet is used to blow coke powder into the dry quenching coke oven body.

[0017] The beneficial effect of the above technical solution is that coke powder can be blown into the dry quenching coke oven body before or after the charging device opens the oven mouth of the dry quenching coke oven body, so that the coke powder can react with the oxygen entering the dry quenching coke oven body, thereby reducing the reaction of red coke falling into the dry quenching coke oven body with the oxygen entering the dry quenching coke oven body, thereby reducing the loss of red coke during the quenching process in the dry quenching coke oven body.

[0018] The above technical solution also includes a coke powder storage tank and a blowing device. The coke powder storage tank has a discharge port at the lower end, and its discharge port is connected to the feed port of the blowing device, and the discharge port of the blowing device is connected to the blowing port.

[0019] The beneficial effect of the above technical solution is that it makes the entire dry quenching coke oven more integrated and more flexible in operation.

[0020] The blowing device in the above technical solution is a powder injector.

[0021] The beneficial effects of the above technical solution are: its structure is simple and the cost is low.

[0022] The blowing inlet in the above technical solution extends to a pre-storage chamber close to the upper inner part of the dry quenching coke oven body.

[0023] The beneficial effect of the above technical solution is that the coke powder sprayed into the dry quenching coke oven body is fully dispersed in the dry quenching coke oven body pre-storage chamber to fully contact with the oxygen entering the dry quenching coke oven body and undergo oxidation reaction.

[0024] The above technical solution also includes a control system. The upper part of the loading device is provided with a seating sensing device, and the seating sensing device is used to sense whether the coke can is seated in place on the upper part of the loading device. The first valve is a control valve, and the seating sensing device, the first valve and the blowing device are all electrically connected to the control system.

[0025] The beneficial effect of the above technical solution is that it makes the whole dry quenching coke oven more automated, saves labor costs, and makes its operation safer.

[0026] A second object of the present invention is to provide a method for preparing dry quenched coke using the dry quenching coke oven as described above, comprising the following steps:

[0027] Step 1: The mature hot red coke pushed out of the coke oven is transferred to the top of the dry quenching coke oven body through the coke tank;

[0028] Step 2, the charging device starts to operate, opens the furnace port of the dry quenching coke oven body, then opens the first valve and opens the blowing device to start blowing coke powder into the dry quenching coke oven body, after the furnace port of the dry quenching coke oven body is fully opened, the coke tank is seated downward onto the charging device, after the coke tank is seated in place, the bottom door of the coke tank is automatically opened, and the red coke in the coke tank is dropped from the furnace port of the dry quenching coke oven body into the dry quenching coke oven body through the charging device;

[0029] Step 3, after the red coke in the coke drum is completely dropped, the coke drum is lifted to a standby position, and the charging device starts to close the furnace port of the dry quenching coke oven body. After the furnace port of the dry quenching coke oven body is completely closed, the blowing device is closed and the first valve is closed to stop blowing coke powder into the dry quenching coke oven body;

[0030] Step 4, after the next batch of red coke in the coke oven is mature, repeat the operations of steps 1, 2 and 3 in sequence.

[0031] The beneficial effect of the above technical solution is that each time red coke is loaded into the dry quenching coke oven body (before the oven mouth is opened), coke powder is blown into the dry quenching coke oven body to protect the red coke loaded therein, that is, the temperature of the coke powder rises under the action of the red coke and undergoes an oxidation reaction with the oxygen entering the dry quenching coke oven body, thereby reducing the probability of the oxygen entering the dry quenching coke oven body reacting with the red coke, thereby reducing the loss of red coke. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The figure is a simplified structural diagram of the dry quenching coke oven according to an embodiment of the present invention.

[0033] In the figure: 1 dry quenching coke oven body, 11 charging device, 12 blowing inlet, 121 first valve, 2 coke powder storage tank, 3 blowing device, 4 coke tank. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0035] Example 1

[0036] like Figure 1As shown, this embodiment provides a dry quenching coke oven, comprising a dry quenching coke oven body 1 and a charging device 11 installed at the furnace mouth of the dry quenching coke oven body 1, a blowing inlet 12 is provided at the upper end of the side wall of the dry quenching coke oven body 1, and a first valve 121 is provided at the blowing inlet 12, and the blowing inlet 12 is used to blow coke powder into the dry quenching coke oven body 1. In this way, coke powder can be blown into the dry quenching coke oven body before or after the furnace cover is opened, so that the coke powder can react with the oxygen entering the dry quenching coke oven body, thereby reducing the reaction of red coke (red hot coke, coke with a temperature of 1000±50℃) falling into the dry quenching coke oven body with the oxygen entering the dry quenching coke oven body, thereby reducing the loss of red coke during the quenching process in the dry quenching coke oven body.

[0037] The above technical solution also includes a coke powder storage tank 2 and a blowing device 3. The coke powder storage tank 2 has a discharge port at the lower end, and its discharge port is connected to the feed port of the blowing device 3. The discharge port of the blowing device 3 is connected to the blowing port 12, so that the entire dry quenching coke oven is more integrated and the operation is more sensitive.

[0038] The spraying device 3 in the above technical solution is a powder injector, which has a simple structure and low cost.

[0039] In the above technical solution, the blowing inlet 12 is extended to the pre-storage chamber near the upper part of the dry quenching coke oven body 1, so that the coke powder sprayed into the dry quenching coke oven body is fully dispersed in the pre-storage chamber of the dry quenching coke oven body to fully contact with the oxygen entering the dry quenching coke oven body and undergo oxidation reaction.

[0040] The above technical solution also includes a control system. The upper part of the charging device 11 is provided with a seating sensing device, and the seating sensing device is used to sense whether the coke tank 4 is seated in place on the upper part of the charging device 11. The first valve 121 is a control valve. The seating sensing device, the first valve (121) and the blowing device 3 are all electrically connected to the control system, so that the entire dry quenching coke oven has a higher degree of automation, saves labor costs, and makes its operation safer.

[0041] Among them, the improvement of the charging device 11 based on the existing technology is that it is also provided with a rotating distribution device for evenly distributing the material (so that the red coke falling into the dry quenching coke oven body can be more fully in contact with the coke powder sprayed by the spraying device), and it has an automatic furnace cover for opening or closing the furnace mouth, and the driving device of the automatic furnace cover is also electrically connected to the control system so that the control system controls the automatic furnace cover to open or close the furnace mouth.

[0042] Among them, when the powder injector is working, nitrogen with a certain pressure is introduced into its air inlet, and its feed port is connected with the discharge port of the coke powder storage tank. Among them, a second valve is provided at the air inlet of the powder injector, and the second valve is a control valve. The powder injector is electrically connected to the control system through the second valve thereon. Under the premise that the first valve is opened, the control system controls the second valve to open so that coke powder can be injected through the powder injector.

[0043] Example 2

[0044] This embodiment provides a method for preparing dry quenched coke using the dry quenching coke oven described in Example 1, comprising the following steps:

[0045] Step 1: The mature hot red coke pushed out of the coke oven is transferred to the top of the dry quenching coke oven body 1 through the coke tank 4;

[0046] Step 2, the charging device 11 starts to operate, opens the furnace mouth of the dry quenching coke oven body 1, then opens the first valve 121 and opens the blowing device 3 to start blowing coke powder into the dry quenching coke oven body 1, after the furnace mouth of the dry quenching coke oven body 1 is fully opened, the coke tank 4 is seated downward on the charging device 11, after the coke tank 4 is seated in place, the bottom door of the coke tank is automatically opened, and the red coke in the coke tank 4 is dropped from the furnace mouth of the dry quenching coke oven body 1 into the dry quenching coke oven body 1 through the charging device 11;

[0047] Step 3, after the red coke in the coke pot 4 is completely dropped, the coke pot 4 is lifted to the standby position, and the charging device 11 starts to close the furnace port of the dry quenching coke oven body 1. After the furnace port of the dry quenching coke oven body 1 is completely closed, the blowing device 3 is closed and the first valve 121 is closed to stop blowing coke powder into the dry quenching coke oven body 1;

[0048] Step 4, after the next batch of red coke in the coke oven matures, the operations of step 1, step 2 and step 3 are repeated in sequence. In this way, each time the red coke is loaded into the dry quenching coke oven body (before the oven mouth is opened), coke powder is blown into the dry quenching coke oven body to protect the red coke loaded therein, that is, the temperature of the coke powder rises under the action of the red coke and undergoes an oxidation reaction with the oxygen entering the dry quenching coke oven body, thereby reducing the probability of the oxygen entering the dry quenching coke oven body reacting with the red coke, thereby reducing the loss of red coke.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dry quenching coke oven, characterized in that: The invention comprises a dry quenching coke oven body (1) and a charging device (11) installed at the oven mouth of the dry quenching coke oven body (1), wherein a blowing inlet (12) is provided at the upper end of a side wall of the dry quenching coke oven body (1), wherein a first valve (121) is provided at the blowing inlet (12), and wherein the blowing inlet (12) is used to blow coke powder into the dry quenching coke oven body (1) using nitrogen as a carrier gas; and further comprises a coke powder storage tank (2) and a blowing device (3), wherein the coke powder storage tank (2) has a discharge port at the lower end thereof, and the discharge port is connected to a feed port of the blowing device (3), and the discharge port of the blowing device (3) is connected to the blowing inlet (1). 2) is connected; the blowing device (3) is a powder injector; the blowing inlet (12) extends to a pre-storage chamber near the upper inner portion of the dry quenching coke oven body (1); and also includes a control system, the upper portion of the charging device (11) is provided with a seating sensing device, the seating sensing device is used to sense whether the coke tank (4) is seated in place on the upper portion of the charging device (11), the first valve (121) is a control valve, the seating sensing device, the first valve (121) and the blowing device (3) are all electrically connected to the control system, and the charging device (11) is also provided with a rotary material distribution device for evenly distributing the material.

2. A method for preparing dry quenched coke using the dry quenching coke oven as claimed in claim 1, characterized in that: The steps include: Step 1, transferring the mature hot red coke pushed out of the coke oven to the top of the dry quenching coke oven body (1) through a coke tank (4); Step 2, the charging device (11) starts to operate, opens the furnace mouth of the dry quenching coke oven body (1), then opens the first valve (121) and opens the blowing device (3) to start blowing coke powder into the dry quenching coke oven body (1), after the furnace mouth of the dry quenching coke oven body (1) is completely opened, the coke tank (4) is seated downward onto the charging device (11), after the coke tank (4) is seated in place, the bottom door of the coke tank is automatically opened, and the red coke in the coke tank (4) is dropped from the furnace mouth of the dry quenching coke oven body (1) into the dry quenching coke oven body (1) through the charging device (11); Step 3, after the red coke in the coke tank (4) has been completely emptied, the coke tank (4) is lifted to a standby position, and the charging device (11) starts to close the furnace opening of the dry quenching coke oven body (1). After the furnace opening of the dry quenching coke oven body (1) is completely closed, the blowing device (3) is closed and the first valve (121) is closed to stop blowing coke powder into the dry quenching coke oven body (1); Step 4, after the next batch of red coke in the coke oven is mature, repeat the operations of steps 1, 2 and 3 in sequence.

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