A coking method, system and coke

Abstract

The present application provides a coking method, wherein the method comprises: loading coking coal into a coking oven from a coal loading hole by a coal loading car, coking according to a set coking temperature and a first set time, wherein the set coking temperature is lower than the original coking temperature, or the first set time is lower than the original coking time; when the coking reaches the first set time, the coke semi-finished product obtained by coking is pushed out of the coking oven by a coke intercepting car, and loaded into a coke tank to achieve full mixing of the coke semi-finished product; packaging the fully mixed coke semi-finished product into a heat insulation device, and heat-insulating it according to a second set time; when the heat insulation of the coke semi-finished product reaches the second set time, discharging the coke semi-finished product from the heat insulation device, quenching the coke through a dry quenching coke oven, and obtaining a coke product. The present application can increase the coke yield, reduce energy consumption, and improve the production efficiency of coke.

Description

Technical Field

[0001] The present application relates to the field of coking coal technology, and in particular to a coking method, system and coke. Background Art

[0002] In traditional chamber coking, when the coke is fully mature, it is pushed and then quenched. According to the law of coke maturation, the coke close to the furnace wall of the carbonization chamber matures first, and then it is pushed toward the center from the furnace walls on both sides. Therefore, in the later stage of coking, only the central area is green coke, and the coke in other parts is already mature. The closer to the furnace wall, the longer the maturation time.

[0003] In the existing scheme, heating needs to be continued to ensure the maturity of the central coke. However, the earliest mature coke may be overburned, which will affect the quality of the earliest mature coke. Since most of the coke is already mature, continued heating will result in a waste of energy.

[0004] Based on this, how to increase coke output, reduce energy consumption and ensure the efficiency of coke production is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present application is to provide a coking method, system and coke. By adopting the technical solution of the present application, the energy consumption in the coking process is greatly reduced and the efficiency of coke production is improved.

[0006] Specifically, this application adopts the following technical solutions:

[0007] According to one aspect of an embodiment of the present application, a coking method is provided, the method comprising: loading coking coal into a coking oven from a coal loading hole by a coal loading car, and coking according to a set coking temperature and a first set time, wherein the set coking temperature is lower than the original coking temperature, or the first set time is lower than the original coking time; when the coking reaches the first set time, the semi-finished coke obtained by coking is pushed out of the coking oven by a coke intercepting car, and loaded into a coke tank to achieve sufficient mixing of the semi-finished coke; packaging the fully mixed semi-finished coke into a heat insulation device, and keeping it warm according to a second set time; when the insulation of the semi-finished coke reaches the second set time, discharging the semi-finished coke from the heat insulation device, quenching the coke through a dry quenching coke oven, and obtaining a finished coke.

[0008] In some embodiments of the present application, based on the aforementioned scheme, before the coking coal is loaded into the coking oven from the coal loading hole by a coal loading car and coking is performed according to the set coking temperature and the first set time, the method also includes: obtaining an original coking temperature and using the original coking temperature as the set coking temperature; obtaining an original coking time and shortening the original coking time to obtain a test coking time; coking according to the set coking temperature and the test coking time, and according to the second set time, fully mixing the coke semi-finished products obtained by coking and loading them into a heat insulation device for insulation; detecting the maturity of the coke semi-finished products after insulation; if the maturity is higher than a preset threshold, using the test coking time as a new original coking time, returning to the step of obtaining the original coking time, until the maturity is lower than the preset threshold, and the last obtained test coking time is determined as the first set time.

[0009] In some embodiments of the present application, based on the aforementioned scheme, before the coking coal is loaded into the coking oven from the coal loading hole by a coal loading car and coking is performed according to the set coking temperature and the first set time, the method also includes: obtaining an original coking time and using the original coking time as the first set time; obtaining the original coking temperature, lowering the original coking temperature, and obtaining a test coking temperature; coking according to the test coking temperature and the first set time, and according to the second set temperature, fully mixing the coke semi-finished products obtained by coking and loading them into a heat insulation device for insulation; detecting the maturity of the coke semi-finished products after insulation; if the maturity is higher than a preset threshold, using the test coking temperature as a new original coking temperature, returning to the step of obtaining the original coking temperature, until the maturity is lower than the preset threshold, and then determining the last obtained test coking temperature as the set coking temperature.

[0010] In some embodiments of the present application, based on the aforementioned solution, the coke oven includes a 6m coke oven.

[0011] In some embodiments of the present application, based on the above scheme, the second set time is set to 2h, and the volume of the thermal insulation device is set to 510m 3 .

[0012] In some embodiments of the present application, based on the aforementioned scheme, the original coking time is 19 hours, and the original coking temperature is 1320°C.

[0013] In some embodiments of the present application, based on the above scheme, the heat insulation device is arranged above the dry quenching coke oven to achieve continuous operation between heat preservation and quenching of the semi-finished coke.

[0014] In some embodiments of the present application, based on the aforementioned solution, the heat insulation device is arranged in the pre-storage section of the dry quenching coke oven to save the operating space occupied by the heat insulation device.

[0015] According to one aspect of an embodiment of the present application, a coking system is provided, the system comprising at least: a coking oven, a coke intercepting car, a coke tank, and a heat insulation device.

[0016] According to one aspect of an embodiment of the present application, there is provided coke, which is produced by the coking method described in the above embodiment.

[0017] It can be seen from the above technical solution that the present application has at least the following advantages and positive effects:

[0018] On the one hand, the solution proposed in this application can increase coke production, reduce energy consumption, and improve the efficiency of coke production.

[0019] On the other hand, the solution proposed in this application can save the working space of the coking site and save the resources of the coking facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 A flow chart of a coking method in one embodiment of the present application is shown. DETAILED DESCRIPTION

[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0023] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0024] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the objects used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those shown or described.

[0026] The implementation details of the technical solution of the embodiment of the present application are described in detail below:

[0027] According to the present application, a coking method is provided, referring to Figure 1 , is a flow chart of a coking method of the present application, the method comprising:

[0028] S1, loading coking coal into the coking oven from the coal loading hole by a coal loading car, and coking is performed according to a set coking temperature and a first set time, wherein the set coking temperature is lower than the original coking temperature, or the first set time is lower than the original coking time.

[0029] S2, when the coking reaches the first set time, the semi-finished coke obtained by coking is pushed out from the coking oven through the coke intercepting car, and loaded into the coke tank to achieve sufficient mixing of the semi-finished coke.

[0030] S3, packaging the fully mixed coke semi-finished product into a heat insulation device, and keeping it warm according to a second set time.

[0031] S4, when the semi-finished coke product is kept warm for a second set time, the semi-finished coke product is discharged from the heat insulation device and quenched in a coke dry quenching oven to obtain a finished coke product.

[0032] In the present application, when coking is carried out in a coke oven, the coke close to the furnace wall is often the first to mature, and then pushed toward the center by the furnace walls on both sides. Therefore, in the later stage of coking, only the central area is green coke, and the coke in other parts is mature. Therefore, we need to push the semi-finished coke obtained by coking out of the coke oven through a coke interceptor, and load it into a coke tank to achieve sufficient mixing of the semi-finished coke, and then load the fully mixed coke into the thermal insulation device. During this period, the mature high-temperature coke will transfer heat to the low-temperature coke that has not yet fully matured, so that all the coke can reach maturity, and then the coke is quenched to obtain a finished coke. This method can greatly improve the quality of the coke.

[0033] In one embodiment of the present application, before the coking coal is loaded into the coking oven from the coal loading hole by the coal loading car and coking is performed according to the set coking temperature and the first set time, the method may further include the following operations of step 21 to step 25:

[0034] Step 21, obtaining an original coking temperature, and using the original coking temperature as the set coking temperature.

[0035] Step 22, obtaining the original coking time, and shortening the original coking time to obtain the test coking time.

[0036] Step 23, coking is performed according to the set coking temperature and the test coking time, and the semi-finished coke obtained by coking is fully mixed and loaded into a heat insulation device for heat preservation according to the second set time.

[0037] Step 24, detecting the maturity of the semi-finished coke product after heat preservation.

[0038] Step 25, if the maturity is higher than the preset threshold, the test coking time is used as a new original coking time, and the step of obtaining the original coking time is returned to execute until the maturity is lower than the preset threshold, and the last obtained test coking time is determined as the first set time.

[0039] In the present application, the original coking time is shortened to obtain a test coking time, and the test coking time is used as the current coking time and the original coking temperature is used as the current coking temperature to carry out coking. The semi-finished products obtained by coking are loaded into the coke tank and fully mixed. Then, according to the second set time (i.e., the residence time in the thermal insulation device), the fully mixed coke semi-finished products are loaded into the thermal insulation device for insulation. During the insulation period, the mature high-temperature coke is in full contact with the not yet fully mature low-temperature coke, and the mature high-temperature coke transfers heat to the not yet fully mature low-temperature coke, thereby maturing the immature coke.

[0040] Furthermore, the maturity of the semi-finished coke product after insulation is tested.

[0041] Furthermore, if the measured maturity of the semi-finished coke product is higher than the preset threshold, the test coking time this time is used as a new original coking time, and then return to the above step 21 to obtain the original coking time, until the measured maturity of the semi-finished coke product is lower than the preset threshold, and the last obtained test coking time is used as the first set time.

[0042] In order to enable those skilled in the art to better understand the present application, a specific embodiment will be described below.

[0043] Taking a 6m coke oven as an example, the original coking time is 19h and the original coking temperature is 1320℃. The maximum time that coke can stay in the thermal insulation device is 2h.

[0044] It can be determined through the scheme in the above embodiment that the first set time is 17.5 hours, and the coke stays in the thermal insulation device for 2 hours.

[0045] The coking coal is loaded into the coke oven carbonization chamber from the coal loading hole by a coal loading car to start coking. When the coking time reaches 17.5 hours, it enters the final stage of coking. The coke is pushed out of the coke oven carbonization chamber, and the coke falls into the coke tank to achieve full mixing. The coke is loaded into a heat-insulating device and stays for 2 hours.

[0046] After the residence time reaches 2 hours, the coke is discharged from the thermal insulation device and quenched.

[0047] It can be seen that since the new coking time is 17.5 h, the coke production capacity is increased by (19-17.5) / 17.5=8.6%.

[0048] In the present application, under the premise of ensuring that the coke is fully mature, the set coking temperature can be maintained on the basis of the original coking temperature, shortening the original coking time, and also achieving the effect of reducing energy consumption and improving coke production efficiency.

[0049] In another embodiment of the present application, before the coking coal is loaded into the coke oven from the coal loading hole by the coal loading car and coking is performed according to the set coking temperature and the first set time, the method may further include the following operations of step 31 to step 35:

[0050] Step 31, obtaining an original coking time, and using the original coking time as the first set time.

[0051] Step 32, obtaining the original coking temperature, shortening the original coking temperature, and obtaining the test coking temperature.

[0052] Step 33, coking is performed according to the test coking temperature and the first set time, and the semi-finished coke obtained by coking is fully mixed and loaded into a heat insulation device for heat preservation according to the second set temperature.

[0053] Step 34, detecting the maturity of the semi-finished coke product after heat preservation.

[0054] Step 35, if the maturity is higher than the preset threshold, the test coking temperature is used as a new original coking temperature, and the step of obtaining the original coking temperature is returned to execute until the maturity is lower than the preset threshold, and the last obtained test coking temperature is determined as the set coking temperature.

[0055] In the present application, the original coking temperature is lowered to obtain a test coking temperature, and coking is carried out using the test coking temperature as the coking temperature and the original coking time as the coking time. The semi-finished products obtained by coking are loaded into a coke tank and mixed sufficiently. Then, according to a second set time (i.e., the residence time in the heat-insulating device), the fully mixed coke semi-finished products are loaded into the heat-insulating device for insulation. During the insulation period, the mature high-temperature coke is in full contact with the low-temperature coke that is not yet fully mature. The mature high-temperature coke transfers heat to the low-temperature coke that is not yet fully mature, thereby maturing the immature coke.

[0056] Furthermore, the maturity of the semi-finished coke product after insulation is tested.

[0057] Furthermore, if the measured maturity of the semi-finished coke product is higher than the preset threshold, the test coking temperature of this time is used as a new original coking temperature, and then returns to the above step 31 to obtain the original coking temperature, until the measured maturity of the semi-finished coke product is lower than the preset threshold, and the finally obtained test coking temperature is used as the set coking temperature.

[0058] In order to enable those skilled in the art to better understand the present application, a specific embodiment will be described below.

[0059] Taking a 6m coke oven as an example, the original coking time is 19h and the coking temperature is 1320℃. The maximum time that coke can stay in the thermal insulation device is 2h.

[0060] It can be determined through the scheme in the above embodiment that the original coking time of 19 hours remains unchanged, the coke stays in the heat insulation device for 2 hours, and the experimental coking temperature is 1300°C.

[0061] The coking temperature is adjusted to 1300℃, and the coking coal is loaded into the coke oven carbonization chamber from the coal loading hole by a coal loading car to start coking. When the coking time reaches the designed coking time of 19h, that is, it enters the final stage of coking, the coke is pushed out of the coke oven carbonization chamber, and the coke is fully mixed in the coke tank when it falls into the coke tank. The coke is then loaded into the heat insulation device and kept for 2h.

[0062] When the residence time reaches 2 hours, the coke is discharged from the thermal insulation device and quenched.

[0063] It can be seen that since the coking temperature was reduced by 20°C, the use of heating gas was reduced and the heat consumption of coking was reduced.

[0064] In the present application, under the premise of ensuring that the coke is fully mature, the first set time is maintained on the basis of the original coking time, and lowering the original coking temperature can also achieve the effect of reducing energy consumption and improving coke production efficiency.

[0065] In the present application, the maturity of the semi-finished coke product after heat preservation is detected, and the maturity of the semi-finished coke product can be judged based on the volatile matter and strength of the semi-finished coke product.

[0066] In one embodiment of the present application, the coke oven may include a 6m coke oven.

[0067] In one embodiment of the present application, the second set time can be set to 2 hours, and the volume of the thermal insulation device can be set to 510m 3 .

[0068] In one embodiment of the present application, the original coking time may be 19 hours, and the original coking temperature may be 1320°C.

[0069] In the present application, as mentioned above, the coke oven can be a 6m or 7m top-loading coke oven, or a 5.5m ramming coke oven, the second setting time can be 2h or 1.6h, and the volume of the heat insulation device can be 510m 3 , can also be 520m 3 The original coking time can be 19 hours or 19.5 hours, and the original coking temperature can be 1320°C or 1315°C. The above-mentioned coking oven height, the second set time, the volume of the thermal insulation device, the original coking time and the original coking temperature can be set according to actual needs, and this application does not limit this.

[0070] In one embodiment of the present application, the heat insulation device may be arranged above the dry quenching coke oven to achieve continuous operation between heat insulation and quenching of the semi-finished coke product.

[0071] In the present application, the thermal insulation device can be arranged above the dry quenching coke oven. When all the coke is mature in the thermal insulation device, the coke can be directly dropped into the dry quenching coke oven without the need to transfer the coke again, thereby ensuring the continuity of the semi-finished coke between the insulation and quenching operations, and also greatly improving the efficiency of coke production.

[0072] In one embodiment of the present application, the heat insulation device may be arranged in a pre-storage section of the dry quenching coke oven to save the operating space occupied by the heat insulation device.

[0073] In the present application, the heat insulation device can also be set in the pre-storage section of the dry quenching coke oven. The pre-storage section of the dry quenching coke has a certain closed space and is resistant to high temperatures. A certain amount of semi-finished coke can be temporarily accumulated, so that the mature high-temperature coke can transfer heat to the low-temperature coke that is not yet fully mature, so that all the coke can reach maturity. At the same time, it also saves the working space of the site and there is no need to build an independent heat insulation device.

[0074] In the present application, when the pre-storage section of the dry quenching coke oven is used as the heat insulation device, the calculation of the maximum residence time of the semi-finished coke in the heat insulation device is described in detail below using a specific embodiment:

[0075] The coke oven with a height of 6m corresponds to a CDQ oven with a processing capacity of 140t / h. The pre-storage volume of the 140t / h CDQ oven is about 350m 3 When the CDQ load is 60%, that is, the coke discharge volume is 140*60%=84t / h, the maximum residence time of the semi-finished coke in the CDQ pre-storage section is T=350*0.5 / 84=2.08h (T is the maximum residence time).

[0076] It should be noted here that when the CDQ load value is different, its maximum residence time will also change. For example, when the CDQ load is 70%, its maximum residence time is 1.79h, and when the CDQ load is 50%, its maximum residence time is 2.5h.

[0077] It should also be noted that, in order to ensure the stability of the CDQ operation, the actual residence time of the semi-finished coke in the CDQ pre-storage section should be less than the calculated maximum residence time during the actual coking operation.

[0078] As another aspect, the present application further provides a coking system, which may include at least: a coking oven, a coke intercepting car, a coke tank, and a heat insulation device, and the system performs coke making operations according to the coking method described in the above embodiments.

[0079] In the present application, the coke oven, coke intercepting car, coke drum, and thermal insulation device can constitute a coking system. The system can use the above-mentioned coking method to complete the coking operation. The coke oven is used to refine coke, and the coke intercepting car is used to push the coke out of the continuous coke oven and drop it into the coke drum. The coke drum then fully mixes the semi-finished coke so that the mature high-temperature coke is in full contact with the low-temperature coke that is not yet fully mature, and then stays in the thermal insulation device for insulation. During this period, the mature high-temperature coke will transfer heat to the low-temperature coke that is not yet fully mature, so that all the coke reaches maturity, and finally the coke is quenched in the dry quenching coke oven. The operation of the system greatly reduces energy consumption and improves the production efficiency of coke.

[0080] As another aspect, the present application also provides a coke, which is produced by the coking method described in the above embodiment.

[0081] It can be seen from the above technical solution that the present application has at least the following advantages and positive effects:

[0082] On the one hand, the solution proposed in this application can increase coke production, reduce energy consumption, and improve the efficiency of coke production.

[0083] On the other hand, the solution proposed in this application can save the working space of the coking site and save the resources of the coking facilities.

[0084] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application.

[0085] Although the present application has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present application can be implemented in a variety of forms without departing from the spirit or essence of the application, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A coking method, It is characterized in that The method comprises: The coking coal is loaded into the coking oven from the coal loading hole by a coal loading car, and coking is performed according to a set coking temperature and a first set time, wherein the set coking temperature is lower than the original coking temperature, and the first set time is lower than the original coking time; the original coking time is 19 hours, and the original coking temperature is 1320° C.; When the coking reaches a first set time, the semi-finished coke obtained by the coking is pushed out from the coking oven through a coke intercepting car and loaded into a coke tank to achieve full mixing of the semi-finished coke; The fully mixed coke semi-finished product is packaged into a heat insulation device and kept warm for a second set time; the second set time is set to 2 hours, and the volume of the heat insulation device is set to 510m 3 ; When the semi-finished coke product is kept warm for a second set time, the semi-finished coke product is discharged from the heat insulation device, and is quenched in a coke dry quenching oven to obtain a finished coke product.

2. The method according to claim 1, It is characterized in that The coke oven includes a 6m coke oven.

3. The method according to any one of claims 1 to 2, It is characterized in that The heat insulation device is arranged above the dry quenching coke oven to realize the continuous operation between heat insulation and quenching of the semi-finished coke.

4. The method according to any one of claims 1 to 2, It is characterized in that The heat insulation device is arranged in the pre-storage section of the dry quenching coke oven to save the operating space occupied by the heat insulation device.

5. A kind of coke, It is characterized in that The product is prepared by the coking method according to any one of claims 1 to 4.

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