CN212440787U - Cement kiln flue gas desulfurization system - Google Patents
Cement kiln flue gas desulfurization system Download PDFInfo
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- CN212440787U CN212440787U CN202020781384.6U CN202020781384U CN212440787U CN 212440787 U CN212440787 U CN 212440787U CN 202020781384 U CN202020781384 U CN 202020781384U CN 212440787 U CN212440787 U CN 212440787U
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Abstract
The utility model relates to a cement kiln flue gas desulfurization system. The system comprises a flue, a controller, a water storage tank, a catalyst storage tank and an ammonia storage tank, wherein the water storage tank is connected with the catalyst storage tank through a water inlet pipeline; a first liquid level sensor for detecting the liquid level of the catalyst is arranged in the catalyst storage tank; a first water pump is arranged on the water inlet pipeline, and a second water pump is arranged on the ammonia inlet pipeline; the controller receives a first liquid level signal output by the first liquid level sensor, compares the first liquid level signal with a set first low threshold and a set first high threshold respectively, controls the first water pump and the second water pump to be switched on when the first liquid level signal is lower than the first low threshold, and controls the first water pump and the second water pump to be switched off when the first liquid level signal is higher than the first high threshold. The utility model provides the high degree of automation of system has practiced thrift manpower resources, has reduced cement manufacturing cost.
Description
Technical Field
The utility model belongs to the technical field of cement kiln flue gas is handled, especially relate to a cement kiln flue gas desulfurization system.
Background
Energy and environment are two major problems in the current social development, the resource characteristics and the economic development level of China determine that the social coal-based energy structure exists for a long time, along with the high-speed development of economic construction, the demand of important building materials such as cement and the like is continuously increased, aiming at the current situation that the cement is fired by using the coal as a main fuel, a large amount of pollutants mainly comprising sulfur dioxide and nitrogen oxides are generated in the cement firing process, and the sulfur and nitrogen oxides are dispersed into the air in a gas form and are the main cause of acid rain formation, so that the emission reduction of the sulfur oxides generated in the cement firing process is realized, and the national requirement on environmental protection is met.
At present, a cement kiln flue gas desulfurization system in the market cannot detect the liquid level of a desulfurization storage tank, convey desulfurization catalysts as required and detect the qualification of the sulfur content in flue gas in real time, and cannot adjust the dosage of the catalysts in real time according to the sulfur content in the flue gas. The desulfurization system of the existing cement kiln flue gas desulfurization system can not monitor the liquid level of the catalyst storage tank on line, so that a worker can not directly know the liquid level of the catalyst storage tank. Therefore, a large amount of human resources are required to be allocated in the cement flue gas desulfurization process, and the cement production cost is increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a cement kiln flue gas desulfurization system to the cement kiln flue gas desulfurization system degree of automation who solves among the prior art is low, the serious technical problem of manpower resource consumption.
The technical scheme of the utility model is that a cement kiln flue gas desulfurization system:
a cement kiln flue gas desulfurization system comprises a flue, a controller, a water storage tank, a catalyst storage tank and an ammonia storage tank, wherein the water storage tank is connected with the catalyst storage tank through a water inlet pipeline;
a first liquid level sensor for detecting the liquid level of the catalyst is arranged in the catalyst storage tank;
a first water pump is arranged on the water inlet pipeline, and a second water pump is arranged on the ammonia inlet pipeline;
the controller receives a first liquid level signal output by the first liquid level sensor, compares the first liquid level signal with a set first low threshold and a set first high threshold respectively, controls the first water pump and the second water pump to be switched on when the first liquid level signal is lower than the first low threshold, and controls the first water pump and the second water pump to be switched off when the first liquid level signal is higher than the first high threshold.
As a further improvement of the technical scheme, a tail gas sensor for detecting the sulfur content in the flue gas is arranged in the flue, a flow controller is arranged on the injection pipeline, the controller receives a detection signal of the tail gas sensor and compares the detection signal with a set qualified threshold value, and when the detection signal is lower than the qualified threshold value, the flow controller is controlled to reduce the flow of the catalyst; and controlling the flow controller to increase the flow of the catalyst when the detection signal is higher than the qualified threshold value.
As a further improvement to the above technical solution, be equipped with into liquid pipeline on the water storage tank and be used for detecting water storage tank water level second level sensor, be equipped with the solenoid valve on the feed liquor pipeline, the controller receives the second level signal of second level sensor output compares it with second low level threshold value and the second high level threshold value of settlement respectively, and control when the second level signal is less than second low level threshold value the solenoid valve is opened, and control when the second level signal is higher than the second high level threshold value the solenoid valve is closed.
As a further improvement to the technical scheme, a first ball valve, a check valve, a second ball valve and a first flowmeter are sequentially connected in series along the water inlet direction on the water inlet pipeline, and the first water pump is connected between the first ball valve and the check valve.
As a further improvement to the technical scheme, the ammonia inlet pipeline comprises a main pipeline and two branch pipelines which are arranged in parallel, the branch pipelines are sequentially connected with a third ball valve, a one-way valve, a filter and a fourth ball valve in series along the ammonia inlet direction, and the second water pump is connected between the one-way valve and the filter.
As a further improvement to the above technical solution, a second flowmeter is connected to the main line upstream of the branch line.
As a further improvement to the technical scheme, a drainage pipeline is further arranged on the trunk pipeline, and a fifth ball valve is arranged on the drainage pipeline.
The utility model provides a cement kiln flue gas desulfurization system compares in prior art, and its beneficial effect lies in:
the utility model discloses a cement kiln flue gas desulfurization system is through setting up first water pump on the water inlet pipeline, set up the second water pump on advancing the ammonia pipeline and set up first level sensor in the catalyst storage tank, send a signal to the controller when first level sensor detects the liquid level in the catalyst storage tank and is less than the setting value, the first water pump of controller control and second water pump are opened, to intaking and ammonia in the catalyst storage tank, automatic feed liquor has been realized, need not staff manual operation, the degree of automation of system has been improved, human resources have been practiced thrift, the cement manufacture cost is reduced.
This implement neotype cement kiln flue gas desulfurization system through set up the tail gas sensor in the flue and set up flow controller on the injection line, and tail gas real-time supervision flue gas contains sulphur content, and the flow of catalyst that the controller contains sulphur volume control injection line to spraying in the flue according to the flue for spout the catalyst in the flue and can give and maintain reasonable flow, when keeping better desulfurization effect, reduced the waste of catalyst.
The utility model discloses a cement kiln flue gas desulfurization system can realize online maintenance when one of them branch road pipeline breaks down through set up two parallelly connected branch road pipelines on advancing the ammonia pipeline, has strengthened the utility model discloses a reliability.
Drawings
FIG. 1 is a schematic diagram of a cement kiln flue gas desulfurization system of the present invention;
FIG. 2 is a schematic view of a water inlet pipeline, a liquid inlet pipeline and an ammonia inlet pipeline in the flue gas desulfurization system of the cement kiln of the present invention;
in the figure: 1. a flue; 2. a catalyst storage tank; 3. a water storage tank; 4. a water inlet pipeline; 5. an ammonia inlet pipeline; 6. an injection line; 7. a liquid inlet pipeline; 8. a PLC control cabinet; 9. a computer; 10. an exhaust gas sensor; 11. a first liquid level sensor; 12. a first ball valve; 13. a first water pump; 14. a check valve; 15. a second ball valve; 16. a first flow meter; 17. a second liquid level sensor; 18. a seventh ball valve; 19. an electromagnetic valve; 20. a third ball valve; 21. a one-way valve; 22. a second water pump; 23. a filter; 24. a fourth ball valve; 25. a second flow meter; 26. a mechanical pressure gauge; 27. an electric pressure gauge; 28. a fifth ball valve; 29. a flow controller; 30. and a sixth ball valve.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
The utility model discloses a concrete embodiment of cement kiln flue gas desulfurization system, as shown in figure 1, figure 2, including controller, flue 1, water storage tank 3, ammonia storage tank and catalyst storage tank 2, wherein, water storage tank 3 passes through water intake pipe 4 with catalyst storage tank 2 and is connected, and ammonia storage tank and catalyst storage tank 2 are connected through advancing ammonia pipe 5, are connected with the injection pipeline 6 that is used for spraying the catalyst in to flue 1 on the catalyst storage tank 2.
In this embodiment, the water inlet pipeline 4 is sequentially connected in series with a first ball valve 12, a first water pump 13, a check valve 14, a second ball valve 15 and a first flow meter 16 along the water inlet direction. Wherein, the first ball valve 12 and the second ball valve 15 control the on-off of the water inlet pipeline 4; the check valve 14 prevents the water in the water inlet line 4 from flowing backwards; the flow meter is preferably an electromagnetic flow meter and is used for detecting the flow of water in the water inlet pipeline 4; the first water pump 13 is in signal connection with the controller and is used for pumping water in the water outlet pipe into the catalyst storage tank 2. The lower extreme at water storage tank 3 is connected to the one end of inlet channel 4, and the upper end at catalyst storage tank 2 is connected to the other end, and the purpose of design like this is: water falls from the upper end of the catalyst storage tank 2, and water is more fully mixed with ammonia in the catalyst storage tank 2 in the falling process, so that the mixing effect of water and ammonia in the catalyst storage tank 2 is enhanced.
In this embodiment, the ammonia inlet pipeline 5 includes a trunk pipeline and two branch pipelines arranged in parallel, one end of the trunk pipeline is connected with the ammonia storage tank, and the other end of the trunk pipeline is connected with the lower end of the catalyst storage tank 2. Each branch pipeline is sequentially connected with a third ball valve 20, a one-way valve 21, a second water pump 22, a filter 23 and a fourth ball valve 24 along the ammonia inlet direction, the third ball valve 20 and the fourth ball valve 24 are used for controlling the on-off of the branch pipelines, the one-way valve 21 prevents the backflow of ammonia in the ammonia inlet pipeline 5, and the filter 23 is used for filtering ammonia. When in use, only one ammonia inlet pipeline 5 is needed to work under the general condition, and the other ammonia inlet pipeline is used as a standby pipeline. When the second water pump 22, the filter 23 or the check valve 21 on the common line are out of order, the common line may be closed by closing the third ball valve 20 and the fourth ball valve 24 on the common line. At the same time, the third ball valve 20 and the fourth ball valve 24 on the standby line are opened to activate the standby line. The damaged components on the common pipeline may then be serviced. The design makes and does not stop production can realize going into ammonia pipe 5 and overhauls, greatly increased the utility model discloses a reliability. Because the aqueous ammonia has certain corrosivity, so the utility model discloses set up the stand-by pipeline on advancing ammonia pipe 5, and the less inlet channel 4 of corrosivity does not set up the stand-by pipeline. The main pipeline is also sequentially connected with a second flowmeter 25, a mechanical pressure gauge 26 and an electric pressure gauge 27 at the upstream of the branch pipeline, and the second flowmeter 25 is an electromagnetic flowmeter for detecting the flow of the ammonia inlet pipeline 5. A sixth ball valve 30 is connected in series on the ammonia inlet pipe 5 at the downstream of the branch pipe, a leakage pipe is also connected on the main pipe between the branch pipe and the second flowmeter 25, and a fifth ball valve 28 for controlling the on-off of the leakage pipe is connected in series on the leakage pipe.
In this embodiment, a first liquid level sensor 11 is installed in the catalyst storage tank 2, preferably, the first liquid level sensor 11 is a radar liquid level meter, and the controller is in signal connection with the first liquid level sensor 11. The controller receives a first liquid level signal output by the first liquid level sensor 11, compares the first liquid level signal with a set first low threshold and a set first high threshold respectively, controls the first water pump 13 and the second water pump 22 to be switched on when the first liquid level signal is lower than the first low threshold, and controls the first water pump 13 and the second water pump 22 to be switched off when the first liquid level signal is higher than the first high threshold.
In this embodiment, the upper end of the water storage tank 3 is connected with a liquid inlet pipeline 7, an electromagnetic valve 19 and a seventh ball valve 18 are sequentially connected on the liquid inlet pipeline 7 in series, and the electromagnetic valve 19 is in signal connection with the controller. Install in the water storage tank 3 and be used for detecting 3 water level second level sensor 17 of water storage tank, second level sensor 17 and controller signal connection. The controller receives the second liquid level signal output by the second liquid level sensor 17, compares the second liquid level signal with a second low threshold and a second high threshold, and controls the electromagnetic valve 19 to be opened when the second liquid level signal is lower than the second low threshold and controls the electromagnetic valve 19 to be closed when the second liquid level signal is higher than the second high threshold.
In this embodiment, the injection pipeline 6 is connected with a flow controller 29, and the flue 1 is internally provided with a tail gas sensor 10 for detecting the sulfur content in the flue gas. The flow controller 29 and the tail gas sensor 10 are respectively in signal connection with a controller, the controller receives a detection signal of the tail gas sensor 10 and compares the detection signal with a set qualified threshold, when the detection signal is lower than the qualified threshold, the flow controller 29 is controlled to reduce the flow of the catalyst, and when the detection signal is higher than the qualified threshold, the flow controller 29 is controlled to increase the flow of the catalyst.
In this embodiment, cement kiln flue gas desulfurization system still includes PLC switch board 8, and the controller is installed in PLC switch board 8. The PLC control cabinet 8 is also provided with a DCS communication module which is communicated with an external computer 9.
The utility model discloses a cement kiln flue gas desulfurization system's theory of operation does: in the working process, the tail gas sensor 10 detects the sulfur content in the flue gas in the flue 1 in real time, the controller receives a detection signal of the tail gas sensor 10, compares the detection signal with a set qualified threshold value, and controls the flow controller 29 on the injection pipeline 6 to reduce the flow of the catalyst when the detection signal is lower than the qualified threshold value; when the detection signal is higher than the pass threshold, the flow controller 29 on the injection line 6 is controlled to increase the catalyst flow rate. A first liquid level sensor 11 on the catalyst storage tank 2 detects the liquid level of the catalyst in the catalyst storage tank 2 in real time, a controller receives a first liquid level signal output by the first liquid level sensor 11, compares the first liquid level signal with a set first low threshold and a set first high threshold respectively, and controls a first water pump 13 and a second water pump 22 to be turned on when the first liquid level signal is lower than the first low threshold, so that water and ammonia are fed into the catalyst storage tank 2; and when the first liquid level signal is higher than a first high threshold value, controlling the first water pump 13 and the second water pump 22 to be switched off, and stopping water and ammonia from entering the catalyst storage tank 2, so that the liquid level in the catalyst storage tank 2 is maintained within a certain height range. The second liquid level sensor 17 detects the water level in the water storage tank 3 in real time, the controller receives a second liquid level signal output by the second liquid level sensor 17, compares the second liquid level signal with a set second low-level threshold and a set second high-level threshold respectively, and controls the electromagnetic valve 19 to be opened when the second liquid level signal is lower than the second low-level threshold so as to feed water into the water storage tank 3; when the second level signal is higher than the second high level threshold, the electromagnetic valve 19 is controlled to close, and water stops entering the water storage tank 3, so that the water in the water storage tank 3 is stabilized within a certain height range.
The utility model provides a cement kiln flue gas desulfurization system compares in prior art, and it has following advantage: the utility model discloses an automatic water inlet, advance ammonia need not staff manual operation, have improved the degree of automation of system, have practiced thrift manpower resources, have reduced cement manufacturing cost. This implementation is novel makes the catalyst that spouts into in the flue 1 can give and maintain at reasonable flow, when keeping better desulfurization effect, has reduced the waste of catalyst. The utility model discloses a cement kiln flue gas desulfurization system can realize online maintenance when one of them branch road pipeline breaks down through setting up two parallelly connected branch road pipelines on advancing ammonia pipe 5, has strengthened the utility model discloses a reliability.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a cement kiln flue gas desulfurization system which characterized in that: the device comprises a flue, a controller, a water storage tank, a catalyst storage tank and an ammonia storage tank, wherein the water storage tank is connected with the catalyst storage tank through a water inlet pipeline, the ammonia storage tank is connected with the catalyst storage tank through an ammonia inlet pipeline, and the catalyst storage tank is connected with an injection pipeline for injecting a catalyst into the flue;
a first liquid level sensor for detecting the liquid level of the catalyst is arranged in the catalyst storage tank;
a first water pump is arranged on the water inlet pipeline, and a second water pump is arranged on the ammonia inlet pipeline;
the controller receives a first liquid level signal output by the first liquid level sensor, compares the first liquid level signal with a set first low threshold and a set first high threshold respectively, controls the first water pump and the second water pump to be switched on when the first liquid level signal is lower than the first low threshold, and controls the first water pump and the second water pump to be switched off when the first liquid level signal is higher than the first high threshold.
2. The cement kiln flue gas desulfurization system according to claim 1, characterized in that: a tail gas sensor for detecting the sulfur content of the flue gas is arranged in the flue, a flow controller is arranged on the injection pipeline, the controller receives a detection signal of the tail gas sensor and compares the detection signal with a set qualified threshold value, and when the detection signal is lower than the qualified threshold value, the flow controller is controlled to reduce the flow of the catalyst; and controlling the flow controller to increase the flow of the catalyst when the detection signal is higher than the qualified threshold value.
3. The cement kiln flue gas desulfurization system according to claim 1, characterized in that: be equipped with into liquid pipeline on the water storage tank and be used for detecting water storage tank water level second level sensor, be equipped with the solenoid valve on the feed liquor pipeline, the controller is received the second liquid level signal of second level sensor output compares it with the second low level threshold value and the high level threshold value of second of setting for respectively, controls when second liquid level signal is less than second low level threshold value the solenoid valve is opened, controls when second liquid level signal is higher than the high level threshold value of second the solenoid valve is closed.
4. The cement kiln flue gas desulfurization system according to claim 1, characterized in that: the water inlet pipeline is connected with a first ball valve, a check valve, a second ball valve and a first flowmeter in series in sequence along the water inlet direction, and a first water pump is connected between the first ball valve and the check valve.
5. The cement kiln flue gas desulfurization system according to claim 4, characterized in that: the ammonia inlet pipeline comprises a main pipeline and two branch pipelines which are arranged in parallel, the branch pipelines are sequentially connected with a third ball valve, a one-way valve, a filter and a fourth ball valve in series along the ammonia inlet direction, and the second water pump is connected between the one-way valve and the filter.
6. The cement kiln flue gas desulfurization system according to claim 5, characterized in that: and a second flowmeter is connected to the main pipeline at the upstream of the branch pipeline.
7. The cement kiln flue gas desulfurization system according to claim 6, characterized in that: still be equipped with the earial drainage pipeline on the trunk line, earial drainage pipeline is equipped with the fifth ball valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020781384.6U CN212440787U (en) | 2020-05-13 | 2020-05-13 | Cement kiln flue gas desulfurization system |
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| CN202020781384.6U CN212440787U (en) | 2020-05-13 | 2020-05-13 | Cement kiln flue gas desulfurization system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115487599A (en) * | 2022-09-28 | 2022-12-20 | 广东韶钢松山股份有限公司 | Ammonia water tank circulating and filtering system |
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2020
- 2020-05-13 CN CN202020781384.6U patent/CN212440787U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115487599A (en) * | 2022-09-28 | 2022-12-20 | 广东韶钢松山股份有限公司 | Ammonia water tank circulating and filtering system |
| CN115487599B (en) * | 2022-09-28 | 2024-03-08 | 广东韶钢松山股份有限公司 | Ammonia water tank circulating filtration system |
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