CN209985203U - Calcium spraying control equipment for dry desulphurization - Google Patents
Calcium spraying control equipment for dry desulphurization Download PDFInfo
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- CN209985203U CN209985203U CN201920697011.8U CN201920697011U CN209985203U CN 209985203 U CN209985203 U CN 209985203U CN 201920697011 U CN201920697011 U CN 201920697011U CN 209985203 U CN209985203 U CN 209985203U
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Abstract
The utility model discloses a calcium spraying control equipment for dry desulphurization. The calcium spraying control device comprises: PLC controlling means, fire coal sulphur content detection device, coal-fired quantity monitoring device, calcium injection quantity controlling means, sulfur dioxide concentration detecting means, sulfur dioxide processing apparatus. The calcium spraying control equipment can automatically detect the sulfur content of the used coal and the coal amount thrown into the hearth of the circulating fluidized bed boiler, automatically adjust the calcium spraying amount according to the preset calcium/sulfur ratio, and is matched with a subsequent sulfur dioxide treatment device, so that the sulfur dioxide in the coal-fired flue gas is completely absorbed, and the desulfurization efficiency is greatly improved.
Description
Technical Field
The utility model belongs to the technical field of coal-fired desulfurization, concretely relates to calcium spraying control equipment suitable for dry desulfurization system.
Background
The dry desulfurizing technology by spraying calcium in furnace is an important desulfurizing technology in combustion. The dry desulfurization by spraying calcium in the furnace is to convey powdery calcium-based desulfurizer limestone into a hearth of a circulating fluidized bed boiler, the desulfurizer limestone is instantaneously calcined into active calcium oxide particles by heat in the hearth, the calcium oxide particles react with sulfur dioxide in waste gas generated by combustion to generate calcium sulfate and calcium sulfite, one part of the products is discharged from a boiler slag dropping pipe along with ash slag, and the other part of the products is captured by boiler dust removal equipment along with fly ash, so that the aim of removing the sulfur dioxide in the boiler flue gas is fulfilled. The dry desulphurization technology by spraying calcium in the furnace has the advantages of coal saving, electricity saving and high reliability.
There are many studies in the prior art for improving desulfurization efficiency, such as: from the type of desulfurizing agent, activity, particle size; initial sulfur dioxide concentration of boiler flue gas; calcium/sulfur ratio; the reaction temperature and the residence time were investigated. But at present, a control device which can adapt to different boiler loads and different coal types and can automatically adjust the calcium injection amount is lacked.
Disclosure of Invention
Problem to be solved by utility model
In order to solve the problem that exists among the above prior art, the utility model provides a calcium spraying control equipment for dry process desulfurization, calcium spraying control equipment can adapt to different boiler loads and different coal types, spouts the calcium volume according to the sulfur content automatically regulated for sulfur dioxide in the flue gas absorbs completely, effectively improves desulfurization efficiency.
Means for solving the problems
The utility model provides a be used for desulfurated calcium controlgear that spouts of dry process, include: the system comprises a PLC control device, a coal-fired sulfur content detection device, a coal-fired quantity monitoring device, a calcium injection quantity control device, a sulfur dioxide concentration detection device and a sulfur dioxide treatment device, wherein the coal-fired sulfur content detection device, the coal-fired quantity monitoring device, the calcium injection quantity control device, the sulfur dioxide concentration detection device and the sulfur dioxide treatment device are in signal connection with the PLC control device; the device for detecting the sulfur content of the fire coal is arranged at a fire coal feed inlet of the circulating fluidized bed boiler, detects the sulfur content of the fire coal at regular time and transmits the information of the sulfur content to the PLC control device; the coal-fired quantity monitoring device is arranged on a coal-fired conveying pipeline connected with the circulating fluidized bed boiler, automatically monitors the input coal-fired quantity and transmits the coal-fired quantity information to the PLC control device; the calcium spraying amount control device is arranged on a limestone conveying pipeline connected with the circulating fluidized bed boiler and is used for automatically regulating and controlling the calcium spraying amount; the sulfur dioxide concentration detection device is arranged at a smoke outlet of the circulating fluidized bed boiler, detects the concentration of residual sulfur dioxide in smoke and transmits information to the PLC control device.
According to the utility model discloses a spout calcium controlgear for dry process desulfurization, it is the flowmeter to spout calcium quantity control device.
According to a calcium spraying control equipment for dry desulfurization, sulfur dioxide concentration detection device includes sulfur dioxide gas sensor.
According to the utility model discloses a spout calcium controlgear for dry process desulfurization, sulfur dioxide gas sensor is semiconductor gas sensor or electrochemical gas sensor.
Effect of the utility model
The utility model provides a calcium spraying control equipment for dry desulfurization, the coal-fired volume of containing sulphur of the coal-fired of ability automated inspection use and drop into circulating fluidized bed boiler furnace in, again according to preset's calcium/sulphur ratio, the calcium volume is spouted in the automatic adjustment, cooperates subsequent sulfur dioxide processing apparatus in addition for sulfur dioxide in the coal-fired flue gas is absorbed completely, has improved desulfurization efficiency greatly.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present invention and, together with the description, serve to explain the principles of the invention.
Fig. 1 shows a schematic diagram of a calcium injection control device for dry desulfurization according to an embodiment of the present invention.
Description of the reference numerals
The method comprises the following steps of 1-detecting the sulfur content of the fire coal, 2-monitoring the coal quantity, 3-spraying the calcium quantity, 4-detecting the sulfur dioxide concentration, 5-treating the sulfur dioxide, 6-circulating fluidized bed boiler, 61-feeding the fire coal, 62-conveying the fire coal, 63-discharging the flue gas, and 7-conveying the limestone.
Detailed Description
Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, methods, means, elements well known to those skilled in the art have not been described in detail so as not to obscure the present invention.
Example 1
Fig. 1 shows a schematic diagram of a calcium injection control device for dry desulfurization according to an embodiment of the present invention. As shown in fig. 1, the calcium blast controlling apparatus includes: the system comprises a PLC control device (not shown), a coal-fired sulfur content detection device 1, a coal-fired quantity monitoring device 2, a calcium injection quantity control device 3, a sulfur dioxide concentration detection device 4 and a sulfur dioxide treatment device 5, wherein the coal-fired sulfur content detection device 1, the coal-fired quantity monitoring device 2, the calcium injection quantity control device 3, the sulfur dioxide concentration detection device 4 and the sulfur dioxide treatment device 5 are in signal connection with the PLC control device; the device 1 for detecting the sulfur content of the fire coal is arranged at a fire coal feed inlet 61 of the circulating fluidized bed boiler 6, detects the sulfur content of the fire coal at regular time and transmits the information of the sulfur content to the PLC control device; the coal-fired quantity monitoring device 2 is arranged on a coal-fired conveying pipeline 62 connected with the circulating fluidized bed boiler 6, automatically monitors the input coal-fired quantity and transmits the coal-fired quantity information to the PLC control device; the calcium spraying amount control device 3 is arranged on a limestone conveying pipeline 7 connected with the circulating fluidized bed boiler 6 and is used for automatically regulating and controlling the calcium spraying amount; the sulfur dioxide concentration detection device 4 is arranged at a flue gas outlet 63 of the circulating fluidized bed boiler 6, detects the concentration of the residual sulfur dioxide in the flue gas and transmits the information to the PLC control device.
In this embodiment, the coal sulfur content detection device 1 may sample and examine the coal sample several times within a predetermined time, detect the coal sulfur content, and calculate the average value of the coal sulfur content, so as to obtain more accurate coal sulfur content information.
In this embodiment, the collected coal-fired quantity information and coal-fired sulfur content information are transmitted to the PLC control device, the PLC control device calculates the required calcium injection quantity according to the preset calcium/sulfur ratio, and sends an instruction to the calcium injection quantity control device 3, and the calcium injection quantity control device 3 automatically adjusts the calcium injection quantity and the calcium injection speed according to the received instruction, and delivers the dried desulfurizing agent limestone to the hearth of the circulating fluidized bed boiler 6. In one possible embodiment, the calcium injection amount control device 3 is a flow meter.
In the present embodiment, the sulfur dioxide concentration detection device 4 is not particularly limited, and may be various real-time detection devices conventional in the art, which have a sulfur dioxide sensitive probe or sensor. Without limitation, these inductive probes or sensors need only be capable of converting a gas signal into an electrical signal. In this embodiment, the sulfur dioxide concentration detection device 4 is composed of a gas sensor array, a gas sensor array driving circuit, and a collection device. The type of gas sensor that can be used in the present invention is not particularly limited, and may be, for example: a semiconductor gas sensor, a solid electrolyte gas sensor, an electrochemical gas sensor, an optical gas sensor, or the like, and preferably, a semiconductor gas sensor or an electrochemical gas sensor.
In this embodiment, a PLC control device having a central processing unit may be used to perform data analysis on the sulfur dioxide concentration data collected by the sulfur dioxide concentration detection device 4. For example, the utility model discloses in, the signal that sulfur dioxide concentration detection device 4 that contains gas sensor produced produces data signal through devices such as modulate circuit and analog-to-digital conversion module, and these data signal get into PLC controlling means's central processing unit and carry out real-time, online data analysis. Specifically, the PLC control device can set a series of standard sulfur dioxide concentration values with different gradients according to the concentration to be controlled by sulfur dioxide. The PLC control device judges according to the concentration data of the residual sulfur dioxide gas detected by the sulfur dioxide concentration detection device 4: when the sulfur dioxide concentration data is higher than the standard sulfur dioxide concentration value set by the PLC control device, outputting a signal to a sulfur dioxide treatment device 5 to start to treat the residual sulfur dioxide; if the sulfur dioxide concentration data is lower than the standard sulfur dioxide concentration value set by the PLC control device, no signal is output.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A calcium injection control apparatus for dry desulfurization comprising: the system comprises a PLC control device, a coal-fired sulfur content detection device, a coal-fired quantity monitoring device, a calcium injection quantity control device, a sulfur dioxide concentration detection device and a sulfur dioxide treatment device, wherein the coal-fired sulfur content detection device, the coal-fired quantity monitoring device, the calcium injection quantity control device, the sulfur dioxide concentration detection device and the sulfur dioxide treatment device are in signal connection with the PLC control device; the device for detecting the sulfur content of the fire coal is arranged at a fire coal feed inlet of the circulating fluidized bed boiler, detects the sulfur content of the fire coal at regular time and transmits the information of the sulfur content to the PLC control device; the coal-fired quantity monitoring device is arranged on a coal-fired conveying pipeline connected with the circulating fluidized bed boiler, automatically monitors the input coal-fired quantity and transmits the coal-fired quantity information to the PLC control device; the calcium spraying amount control device is arranged on a limestone conveying pipeline connected with the circulating fluidized bed boiler and is used for automatically regulating and controlling the calcium spraying amount; the sulfur dioxide concentration detection device is arranged at a smoke outlet of the circulating fluidized bed boiler, detects the concentration of residual sulfur dioxide in smoke and transmits information to the PLC control device.
2. The calcium injection control apparatus for dry desulfurization according to claim 1, characterized in that the calcium injection amount control device is a flow meter.
3. The calcium injection control apparatus for dry desulfurization according to claim 1, characterized in that the sulfur dioxide concentration detection means includes a sulfur dioxide gas sensor.
4. The calcium injection control apparatus for dry desulfurization according to claim 3, characterized in that the sulfur dioxide gas sensor is a semiconductor gas sensor or an electrochemical gas sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920697011.8U CN209985203U (en) | 2019-05-16 | 2019-05-16 | Calcium spraying control equipment for dry desulphurization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920697011.8U CN209985203U (en) | 2019-05-16 | 2019-05-16 | Calcium spraying control equipment for dry desulphurization |
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| Publication Number | Publication Date |
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| CN209985203U true CN209985203U (en) | 2020-01-24 |
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| CN201920697011.8U Active CN209985203U (en) | 2019-05-16 | 2019-05-16 | Calcium spraying control equipment for dry desulphurization |
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| CN (1) | CN209985203U (en) |
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- 2019-05-16 CN CN201920697011.8U patent/CN209985203U/en active Active
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