A lime kiln thermal efficiency monitoring system and method

Abstract

The present application relates to a kind of lime kiln thermal efficiency monitoring system and method, the system includes: lime production acquisition module, the lime production of certain time period is counted, and the lime production data of this time period is obtained;Gas consumption total acquisition module, the total amount of gas consumption in certain time period is counted, and the total amount of gas consumption data of this time period is obtained;Insulation gas quantity acquisition module, the amount of gas consumption for the insulation of lime kiln in certain time period is counted, and the insulation gas quantity data of this time period is obtained;Coal powder consumption quantity acquisition module, the amount of coal powder consumption in certain time period is counted, and the coal powder consumption quantity data of this time period is obtained;Lime kiln thermal efficiency acquisition module, according to the lime production data, the total amount of gas consumption data, insulation gas quantity data, coal powder consumption quantity data of control module in certain time period are calculated to the thermal efficiency of lime kiln.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metallurgical automation, and relates to a monitoring system for metallurgy, in particular to a lime kiln thermal efficiency monitoring system and method; real-time monitoring of lime kiln thermal efficiency is realized, abnormal conditions are found and handled in time, and energy waste and environmental pollution are avoided. BACKGROUND

[0002] Lime is used in large quantities in the steel industry, the calcium carbide industry, the alumina industry, the refractory material industry and the like, and equipment for producing limestone mainly includes lime kilns. The process of the lime kiln is as follows: limestone and fuel are loaded into the lime kiln (if gaseous fuel is sent into the kiln through a pipeline and a burner), preheated, and then decomposed at 850 DEG C, calcined at 1200 DEG C, and then unloaded out of the kiln after cooling, thereby completing the production of the lime product. The heat required for preheating and calcining is mainly provided by the combustion of coal gas and coal powder, and therefore the height of the thermal efficiency of the lime kiln is extremely important to the cost. How to quickly and accurately calculate and monitor the thermal efficiency is very important in the lime production process.

[0003] In the prior art, the utility model patent with the publication number CN205692022U discloses a lime kiln remote monitoring control system, and specifically provides the following technical scheme:

[0004] The system comprises an industrial computer arranged on site and a remote computer arranged remotely, the industrial computer is connected with a data acquisition processor through a communication card, the data acquisition processor is connected with an online data acquisition device, the data acquisition device comprises a temperature acquisition device, a pressure acquisition device, a fan flow detection device, a weighing device, a material level detection device and a gas concentration detection device, further, the temperature acquisition device comprises a furnace body temperature detection device, a kiln top temperature detection device, a flue gas temperature detection device, an ash discharge temperature detection device and a combustion air temperature detection device, the furnace body temperature detection device is distributed with four layers at the height of the lime kiln, each layer is composed of four K-type thermocouples at the same height and uniformly distributed in the circumference of the lime kiln, one layer of the four layers of thermocouples is arranged in the preheating zone, two layers are arranged in the calcining zone, and one layer is arranged in the cooling zone, the kiln top temperature detection device adopts two K-type thermocouples to acquire the kiln top temperature, the flue gas temperature detection device adopts two K-type thermocouples to acquire the flue gas temperature, the ash discharge temperature detection device adopts two PT100-type thermocouples to acquire the ash discharge temperature, and the combustion air temperature detection device adopts one PT100-type thermocouple to acquire the combustion air temperature, further, the pressure acquisition device comprises a kiln top pressure transmitter and a fan pressure transmitter, the kiln top pressure transmitter and the fan pressure transmitter are both composed of a capacitive pressure transmitter, further, the fan flow detection device comprises a fan flow transmitter and an orifice flowmeter, the fan is connected with a frequency converter, the frequency converter is used for accurately controlling the air volume of the combustion air entering the furnace, further, the weighing device comprises a weighing module, a weighing sensor is directly connected to the weighing module, and the weighing module is connected to a PLC, further, the gas concentration detection device is a flue gas analyzer arranged on the furnace top, further, the material level detection device is an intelligent material level detector, and a high-temperature-resistant imaging equipment is further arranged on the furnace top, and the high-temperature-resistant imaging equipment is directly connected to the industrial computer.

[0005] Although the prior art gives remote monitoring and control of the lime kiln, it does not solve the problem of monitoring the thermal efficiency of the lime kiln, and the prior art has the technical problems of energy waste and environmental pollution caused by the inability to monitor the thermal efficiency of the lime kiln.

[0006] Therefore, it is necessary to provide a lime kiln thermal efficiency monitoring system and method to solve the above-mentioned defects in the prior art. SUMMARY

[0007] The purpose of the present application is to solve the above-mentioned technical problems by providing a lime kiln thermal efficiency monitoring system and method.

[0008] In order to achieve the above object, the present application provides the following technical scheme:

[0009] A lime kiln thermal efficiency monitoring system comprises:

[0010] A lime production acquisition module, which is used for counting lime production in a certain time period and obtaining lime production data in the time period, denoted as W 石灰产量 ;

[0011] A total coal gas consumption acquisition module, which is used for counting total coal gas consumption in a certain time period and obtaining total coal gas consumption data in the time period, denoted as Q 总煤气 ;

[0012] A heat preservation coal gas amount acquisition module, which is used for counting heat preservation coal gas consumption in a certain time period for lime kiln and obtaining heat preservation coal gas amount data in the time period, denoted as Q 保温煤气 ;

[0013] A pulverized coal consumption amount acquisition module, which is used for counting pulverized coal consumption amount in a certain time period and obtaining pulverized coal consumption amount data in the time period, denoted as M 煤 ;

[0014] A control module, which is connected with the lime production acquisition module, the total coal gas consumption acquisition module, the heat preservation coal gas amount acquisition module and the pulverized coal consumption amount acquisition module, and obtains corresponding data collected by the lime production acquisition module, the total coal gas consumption acquisition module, the heat preservation coal gas amount acquisition module and the pulverized coal consumption amount acquisition module;

[0015] A lime kiln thermal efficiency acquisition module, which is connected with the control module and calculates thermal efficiency of the lime kiln according to lime production data, total coal gas consumption data, heat preservation coal gas amount data and pulverized coal consumption amount data in a certain time period obtained by the control module, and the calculation formula is as follows:

[0016]

[0017] In the formula, η is the thermal efficiency of the lime kiln;

[0018] is the decomposition heat of CaCO3;

[0019] is the decomposition heat of MgCO3;

[0020] q 煤气 is the average heat value of coal gas;

[0021] q 煤 is the average heat value of pulverized coal;

[0022] A data display module is connected with the control module and displays the lime kiln thermal efficiency value calculated by the lime kiln thermal efficiency acquisition module.

[0023] As preferred, the control module is further connected with a pre-warning module, which judges the lime kiln thermal efficiency value obtained by the lime kiln thermal efficiency acquisition module, and sends an alarm information when the lime kiln thermal efficiency value is not within the preset range, so that the lime kiln thermal efficiency is monitored and the abnormal situation is processed in time.

[0024] As preferred, the control module is further connected with a storage module, which stores the lime kiln thermal efficiency value, so as to facilitate subsequent inquiry.

[0025] As preferred, the CaCO3 decomposition heat is 426.3 Kcal / Kg, the MgCO3 decomposition heat is 286.4 Kcal / Kg, the average heat value of coal gas is 850 Kcal / Nm 3 , and the average heat value of coal powder is 7278 Kcal / Nm 3 .

[0026] The application further provides a lime kiln thermal efficiency monitoring method, which comprises the following steps:

[0027] Step S1: a lime production collection step, which collects the lime production in a certain time period, and obtains the lime production data in the time period, denoted as W 石灰产量 ;

[0028] Step S2: a total coal gas consumption collection step, which collects the total coal gas consumption in a certain time period, and obtains the total coal gas consumption data in the time period, denoted as Q 总煤气 ;

[0029] Step S3: a heat preservation coal gas amount collection step, which collects the heat preservation coal gas consumption for lime kiln heat preservation in a certain time period, and obtains the heat preservation coal gas amount data in the time period, denoted as Q 保温煤气 ;

[0030] Step S4: a coal powder consumption collection step, which collects the coal powder consumption in a certain time period, and obtains the coal powder consumption data in the time period, denoted as M 煤 ;

[0031] Step S5: a lime kiln thermal efficiency acquisition step, which calculates the thermal efficiency of the lime kiln according to the lime production data, the total coal gas consumption data, the heat preservation coal gas amount data and the coal powder consumption data in a certain time period, and the calculation formula is as follows:

[0032]

[0033] η is the thermal efficiency of lime kiln;

[0034] is the decomposition heat of CaCO3;

[0035] is the decomposition heat of MgCO3;

[0036] q 煤气 is the average heat value of coal gas;

[0037] q 煤 is the average heat value of coal powder;

[0038] Step S6: a data display step, which displays the lime kiln thermal efficiency value calculated in the lime kiln thermal efficiency acquisition step.

[0039] As preferred, the monitoring method further comprises:

[0040] Step S7: a pre-warning step, which judges the lime kiln thermal efficiency value obtained in the lime kiln thermal efficiency step, and sends an alarm information when the lime kiln thermal efficiency value is not within the preset range. The lime kiln thermal efficiency is monitored, and the abnormal situation can be handled in time.

[0041] As preferred, the monitoring method further comprises:

[0042] Step S8: a storage step, which stores the lime kiln thermal efficiency value. The lime kiln thermal efficiency value can be queried subsequently.

[0043] As preferred, the decomposition heat of CaCO3 is 426.3 Kcal / Kg, the decomposition heat of MgCO3 is 286.4 Kcal / Kg, the average heat value of coal gas is 850 Kcal / Nm 3 , and the average heat value of coal powder is 7278 Kcal / Nm 3 .

[0044] The application has the beneficial effects that the lime kiln thermal efficiency can be monitored in real time, the abnormal situation of the lime kiln thermal efficiency value can be found and handled in time, the energy waste and environmental pollution can be effectively avoided, and the technical defects in the prior art are completely solved.

[0045] In addition, the application has reliable design principle, simple structure, and very wide application prospect.

[0046] Therefore, compared with the prior art, the application has outstanding substantial characteristics and significant progress, and the beneficial effects of the implementation are also obvious. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the provided drawings.

[0048] Figure 1 It is a principle block diagram of a lime kiln thermal efficiency monitoring system provided by the present application.

[0049] Figure 2 It is a flow chart of a lime kiln thermal efficiency monitoring method provided by the present application.

[0050] Among them, 1-lime production acquisition module, 2-coal gas consumption total acquisition module, 3-insulation gas quantity acquisition module, 4-pulverized coal consumption quantity acquisition module, 5-control module, 6-lime kiln thermal efficiency acquisition module, 7-data display module, 8-early warning module, 9-storage module. DETAILED DESCRIPTION

[0051] The present application will be described in detail below with reference to the drawings and through specific embodiments. The following embodiments are an explanation of the present application, and the present application is not limited to the following embodiments.

[0052] Embodiment 1:

[0053] As Figure 1 described, the lime kiln thermal efficiency monitoring system provided by the present embodiment comprises:

[0054] The lime production acquisition module 1, which statistically processes the lime production in a certain time period and obtains the lime production data in the time period, is denoted as W 石灰产量 .

[0055] The coal gas consumption total acquisition module 2, which statistically processes the total coal gas consumption in a certain time period and obtains the total coal gas consumption data in the time period, is denoted as Q 总煤气 .

[0056] The insulation gas quantity acquisition module 3, which statistically processes the coal gas consumption for insulating the lime kiln in a certain time period and obtains the insulation gas quantity data in the time period, is denoted as Q 保温煤气 .

[0057] The pulverized coal consumption quantity acquisition module 4, which statistically processes the pulverized coal consumption in a certain time period and obtains the pulverized coal consumption quantity data in the time period, is denoted as M 煤 .

[0058] A control module 5 is connected with the lime output acquisition module 1, the total coal gas consumption acquisition module 2, the heat preservation coal gas acquisition module 3 and the pulverized coal consumption acquisition module 4, and obtains the corresponding data collected by the lime output acquisition module, the total coal gas consumption acquisition module, the heat preservation coal gas acquisition module and the pulverized coal consumption acquisition module.

[0059] A lime kiln thermal efficiency acquisition module 6 is connected with the control module 5, and calculates the thermal efficiency of the lime kiln according to the lime output data, the total coal gas consumption data, the heat preservation coal gas data and the pulverized coal consumption data obtained by the control module in a certain period of time, and the calculation formula is as follows:

[0060]

[0061] In the formula, η is the thermal efficiency of the lime kiln;

[0062] CaCO3 is the decomposition heat of CaCO3;

[0063] MgCO3 is the decomposition heat of MgCO3;

[0064] q 煤气 The average heat value of coal gas is q

[0065] q 煤 The average heat value of pulverized coal is q

[0066] A data display module 7 is connected with the control module 5, and displays the thermal efficiency value of the lime kiln calculated by the lime kiln thermal efficiency acquisition module.

[0067] The control module 5 is further connected with a warning module 8, which judges the thermal efficiency value of the lime kiln obtained by the lime kiln thermal efficiency acquisition module, and sends an alarm information when the thermal efficiency value of the lime kiln is not within the preset range. The control module 5 is further connected with a storage module 9, which stores the thermal efficiency value of the lime kiln. In order to facilitate subsequent inquiry. The decomposition heat of CaCO3 is 426.3 Kcal / Kg, the decomposition heat of MgCO3 is 286.4 Kcal / Kg, the average heat value of coal gas is 850 Kcal / Nm 3 , and the average heat value of pulverized coal is 7278 Kcal / Nm 3 .

[0068] In this embodiment, the period of time can be determined according to specific conditions, which can be one hour, 10 hours or even 24 hours.

[0069] Embodiment 2:

[0070] As Figure 2 shown, the lime kiln thermal efficiency monitoring method provided by the embodiment comprises the following steps:

[0071] Step S1: lime production collection, which collects lime production in a certain period of time, and obtains lime production data in the period, denoted as W 石灰产量 ;

[0072] Step S2: total coal gas consumption collection, which collects total coal gas consumption in a certain period of time, and obtains total coal gas consumption data in the period, denoted as Q 总煤气 ;

[0073] Step S3: heat preservation coal gas quantity collection, which collects heat preservation coal gas consumption for lime kiln in a certain period of time, and obtains heat preservation coal gas quantity data in the period, denoted as Q 保温煤气 ;

[0074] Step S4: pulverized coal consumption collection, which collects pulverized coal consumption in a certain period of time, and obtains pulverized coal consumption data in the period, denoted as M 煤 ;

[0075] Step S5: lime kiln thermal efficiency acquisition, which calculates the thermal efficiency of the lime kiln according to the lime production data, total coal gas consumption data, heat preservation coal gas quantity data, and pulverized coal consumption data in a certain period of time, and the calculation formula is as follows:

[0076]

[0077] In the formula, η is the thermal efficiency of the lime kiln;

[0078] is the heat of decomposition of CaCO3;

[0079] is the heat of decomposition of MgCO3;

[0080] q 煤气 is the average heat value of coal gas;

[0081] q 煤 is the average heat value of pulverized coal;

[0082] Step S6: data display, which displays the thermal efficiency value of the lime kiln calculated in the lime kiln thermal efficiency acquisition step.

[0083] Step S7: a step of early warning, which judges the lime kiln thermal efficiency value obtained in the step of lime kiln thermal efficiency, and sends an alarm information when the lime kiln thermal efficiency value is not within the preset range. The lime kiln thermal efficiency is monitored, so that the abnormal situation can be handled in time.

[0084] Step S8: a step of storage, which stores the lime kiln thermal efficiency value. So as to facilitate subsequent query.

[0085] The decomposition heat of CaCO3 is 426.3 Kcal / Kg, the decomposition heat of MgCO3 is 286.4 Kcal / Kg, the average calorific value of coal gas is 850 Kcal / Nm 3 , and the average calorific value of coal powder is 7278 Kcal / Nm 3 .

[0086] The period of time in the embodiment can be determined according to specific conditions, and can be one hour, 10 hours or even 24 hours.

[0087] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other. For the method disclosed in the embodiment, since it corresponds to the system disclosed in the embodiment, the description is relatively simple, and the related part can be referred to the method part.

[0088] The skilled person can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in the present text can be realized in electronic hardware, computer software or combination of both. In order to clearly show the interchangeability of hardware and software, the composition and steps of each example have been described in the above description. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0089] In several embodiments provided in the present application, it should be understood that the disclosed system, system and method can be realized in other ways. For example, the system embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, system or unit, and can be electrical, mechanical or other forms.

[0090] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0091] In addition, the functional modules in the various embodiments of the present invention can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one unit.

[0092] Similarly, in the various embodiments of the present invention, each processing unit can be integrated into a functional module, or each processing unit can exist physically, or two or more processing units can be integrated into a functional module.

[0093] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0094] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0095] The above-disclosed embodiments are merely preferred embodiments of the present invention, but the present invention is not limited thereto. Any non-creative variations that can be conceived by those skilled in the art, as well as any improvements and modifications made without departing from the principles of the present invention, should fall within the protection scope of the present invention.

Claims

1. A lime kiln thermal efficiency monitoring system, characterized by, Comprising: The lime production collection module collects lime production in a certain time period, and obtains lime production data in the time period, denoted as ; The coal gas consumption total amount collection module collects the total amount of coal gas consumption in a certain time period, and obtains the total amount of coal gas consumption data in the time period, denoted as ; The heat preservation gas quantity collection module collects the gas consumption quantity for heat preservation of the lime kiln in a certain time period, and obtains the heat preservation gas quantity data of the time period, denoted as ; The coal powder consumption collection module collects and counts the coal powder consumption in a certain time period, and obtains the coal powder consumption data of the time period, denoted as ; The control module is connected with the lime output acquisition module, the total coal gas consumption acquisition module, the heat preservation coal gas quantity acquisition module and the pulverized coal consumption acquisition module, and obtains the corresponding data collected by the lime output acquisition module, the total coal gas consumption acquisition module, the heat preservation coal gas quantity acquisition module and the pulverized coal consumption acquisition module; The lime kiln thermal efficiency acquisition module is connected with the control module, and calculates the thermal efficiency of the lime kiln according to the lime output data, the total coal gas consumption data, the heat preservation coal gas quantity data and the pulverized coal consumption data obtained by the control module in a certain time period, and the calculation formula is as follows: In the formula, η is the thermal efficiency of the lime kiln; for heat of decomposition; for heat of decomposition; q 煤气 For the average heating value of coal gas; q 煤 is the average calorific value of the coal dust; The data display module is connected with the control module, and displays the thermal efficiency value of the lime kiln calculated by the lime kiln thermal efficiency acquisition module; The control module is also connected with the early warning module, which judges the thermal efficiency value of the lime kiln obtained by the lime kiln thermal efficiency acquisition module, and sends an alarm information when the thermal efficiency value of the lime kiln is not within the preset range; The control module is also connected with the storage module, which stores the thermal efficiency value of the lime kiln.

2. A lime kiln heat efficiency monitoring system according to claim 1, characterised in that, The The decomposition heat is 426.3 Kcal / Kg, the average heat value of the coal gas is 850 Kcal / The decomposition heat is 286.4 Kcal / Kg, the average heat value of the coal gas is 850 Kcal / , the average heat value of the coal powder is 7278 Kcal / .

3. A method of monitoring the thermal efficiency of a lime kiln, characterized in that, The following steps are included: Step S1: a step of lime production collection, which collects lime production in a certain time period, and obtains lime production data in the time period, denoted as ; Step S2: a step of collecting total gas consumption, which is to count total gas consumption in a certain time period and obtain total gas consumption data of the time period, denoted as ; Step S3: the step of collecting the heat preservation gas quantity, which is used to count the gas consumption for heat preservation of the lime kiln in a certain time period, and obtain the heat preservation gas quantity data of the time period, denoted as ; Step S4: a step of collecting the consumption of coal powder, which counts the consumption of coal powder in a certain time period and obtains the consumption data of coal powder in the time period, denoted as ; Step S5: the step of acquiring the thermal efficiency of the lime kiln, which calculates the thermal efficiency of the lime kiln according to the lime output data, the total coal gas consumption data, the heat preservation coal gas quantity data and the pulverized coal consumption data in a certain time period, and the calculation formula is as follows: In the formula, η is the thermal efficiency of the lime kiln; for heat of decomposition; for heat of decomposition; q 煤气 for the average heating value of the coal gas; q 煤 is the average calorific value of the coal powder; Step S6: the step of data display, which displays the thermal efficiency value of the lime kiln calculated in the step of acquiring the thermal efficiency of the lime kiln; The monitoring method further comprises: Step S7: the step of early warning, which judges the thermal efficiency value of the lime kiln obtained in the step of lime kiln thermal efficiency, and sends an alarm information when the thermal efficiency value of the lime kiln is not within the preset range; The monitoring method further comprises: Step S8: the step of storage, which stores the thermal efficiency value of the lime kiln.

4. A method of monitoring the thermal efficiency of a lime kiln according to claim 3, characterised in that, The aforementioned The heat of decomposition is taken as 426.3 kcal / kg. The heat of decomposition is taken as 286.4 kcal / kg, and the average calorific value of the gas is taken as 850 kcal / kg. The average calorific value of the pulverized coal is 7278 kcal / kcal. .

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