CN210332184U - Solid adsorbent injection system - Google Patents
Solid adsorbent injection system Download PDFInfo
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- CN210332184U CN210332184U CN201921066813.5U CN201921066813U CN210332184U CN 210332184 U CN210332184 U CN 210332184U CN 201921066813 U CN201921066813 U CN 201921066813U CN 210332184 U CN210332184 U CN 210332184U
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Abstract
The utility model provides a solid adsorbent injection system, it can be according to cement kiln tail flue gas mercury discharge concentration automatic control solid adsorbent injection process, but the mercury in the solid adsorbent entrapment absorption flue gas of injection for mercury shifts to the solid phase from the gaseous phase in. The system can avoid excessive addition or insufficient addition of the solid adsorbent, and improve the injection demercuration effect and the use efficiency of the solid adsorbent.
Description
Technical Field
The utility model relates to a flue gas demercuration technical field, concretely relates to solid sorbent injection system.
Background
The mercury emission of China is the most important part of the world, and accounts for 1/3 of the total mercury emission in the world. And the mercury emission in the cement industry is the third major source after coal burning and non-ferrous metal smelting, so that the realization of flue gas mercury emission reduction in the cement industry is an industry development trend. At present, the main technical means for controlling mercury pollution in the cement industry is to control the mercury adding amount in a kiln at the source.
However, the raw combustion materials used in cement production are various and have huge total amount, and the mercury content in different types and batches of incoming materials is not uniformly distributed, so that the total amount of mercury is difficult to estimate. And most cement kilns undertake urban solid waste absorption tasks to different degrees, mercury brought by solid waste of different types and batches also increases the difficulty of controlling mercury emission sources of the cement kilns, and the phenomenon that the content of mercury entering the kilns exceeds the control range in a short period is easy to occur. Mercury is enriched at the tail of the kiln along with the circulation of kiln dust after entering the kiln, short-term release can be generated, instantaneous standard exceeding emission enters the atmosphere, and the short-term standard exceeding emission of the mercury at the tail of the kiln is one of the technical difficulties needing to be broken through in the emission control of the mercury in cement production. At present, mercury removal is achieved by spraying activated carbon sorbent into the flue. However, the existing powder adsorbent injection demercuration technology has the problem that the adding proportion of the adsorbent cannot be automatically and rapidly adjusted, so that the adsorbent is seriously wasted, and the demercuration cost is high. In addition, the adsorbent is easy to accumulate in the flue, and certain potential safety hazard exists. There is therefore a need to develop efficient, automated sorbent injection demercuration techniques.
In view of this, the utility model is especially provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a solid sorbent injection system.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model relates to a solid adsorbent injection system, which comprises an active carbon blanking bin, a discharge pipe, an injection pipeline and an injector, wherein,
the active carbon blanking bin is funnel-shaped, the bottom of the active carbon blanking bin is provided with a funnel hole,
one end of the discharge pipe penetrates into the funnel hole, the other end of the discharge pipe is connected with the injection pipeline,
the ejector is arranged on the ejection pipeline and used for generating high-pressure airflow to output the activated carbon into the ejection pipeline.
Preferably, the tail end of the injection pipeline is positioned in an air inlet flue at the tail of the cement kiln.
Preferably, the system also comprises a flow controller and an online mercury discharge monitoring system, wherein the online mercury discharge monitoring system is positioned in an exhaust funnel at the tail of the cement kiln and is used for detecting the mercury content in the discharged flue gas in real time,
the flow controller is arranged on the injection pipeline and is used for measuring the flow data of the activated carbon in the injection pipeline,
the flow controller is respectively electrically connected with the ejector and the mercury discharge online monitoring system, when the mercury content in the flue gas is higher than a set value, the flow controller is opened to eject the activated carbon into the ejection pipeline and the flue, and when the mercury content in the flue gas is lower than the set value, the flow controller is closed, and the ejector stops ejecting the activated carbon.
Preferably, the activated carbon discharging device further comprises a discharging pipe, wherein the discharging pipe is arranged on the discharging pipe and used for outputting the activated carbon from the activated carbon discharging bin and sequentially conveying the activated carbon into the discharging pipe and the injection pipeline.
Preferably, the activated carbon injector further comprises a roots blower arranged on the injection pipeline and used for inputting the activated carbon into the injection pipeline through wind energy.
Preferably, the spraying gun is arranged at the tail end of the spraying pipeline and used for inputting the activated carbon into an air inlet flue at the tail of the cement kiln.
Preferably, the injection pipeline is provided with a gas phase inlet, a solid phase inlet and a solid phase outlet, the gas phase inlet is provided with the roots blower, the solid phase inlet is connected with the discharge pipe, the solid phase inlet is provided with the injector, and the solid phase outlet is connected with the spray gun.
Preferably, the spray guns are arranged in a single row or multiple rows along the radial direction of the flue.
Preferably, the activated carbon blanking bin adopts vacuum feeding.
Preferably, the injection pipeline is a rubber pipe or a stainless steel pipe.
The utility model has the advantages that:
the utility model provides a solid adsorbent injection system, it can be according to cement kiln tail flue gas mercury discharge concentration automatic control solid adsorbent injection process, but the mercury in the solid adsorbent entrapment absorption flue gas of injection for mercury shifts to the solid phase from the gaseous phase in. The system can avoid excessive addition or insufficient addition of the solid adsorbent, and improve the injection demercuration effect and the use efficiency of the solid adsorbent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic configuration diagram of a solid adsorbent injection system.
FIG. 2 is a diagram showing the connection between the solid adsorbent injection system and the cement kiln.
In the figure: 11-solid sorbent injection system;
111-an active carbon discharging bin;
112-a discharge pipe; 113-a blanking device; 114-roots blower; 115-an injection pipe;
116-a spray gun; 117-an ejector;
12-kiln tail cloth bag dust collector; 15-mercury emission on-line monitoring system;
2-a cement kiln;
21-flue; 22-exhaust funnel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment of the utility model provides a solid sorbent injection system 11 is related to, as shown in FIG. 1, this injection system 11 includes activated carbon blanking bin 111, discharging pipe 112, injection pipeline 115 and sprayer 117.
Wherein, the activated carbon blanking bin 111 is funnel-shaped, and the bottom thereof is provided with a funnel hole. The top of the activated carbon blanking bin 111 is provided with a motor, and vacuum feeding is adopted. In actual use, the powdered activated carbon is packaged and transported to the site by ton bags, the ton bags are opened and sealed, then the gun head of the vacuum feeding machine is inserted into the activated carbon, and the activated carbon is sucked into the activated carbon blanking bin 111 through the vacuum system.
One end of the discharge pipe 112 penetrates into the funnel hole, and the other end is connected with the injection pipeline 115, so that the activated carbon blanking bin 111 is connected and communicated with the injection pipeline 115.
An ejector 117 is provided on the injection duct 115 for generating a high-pressure gas flow to output the activated carbon into the injection duct 115. The utility model discloses an air ejector utilizes compressed air or ordinary pressure air as working medium. The activated carbon powder is inputted into the injection duct 115 by sucking air by generating a low pressure at the nozzle outlet by the air flow and then compressing the air to be discharged. The tail end of the injection pipeline 115 is positioned in an air inlet flue 21 at the tail of the cement kiln 2, so that the activated carbon powder is acted with the flue gas in the flue 21 to generate mercury adsorption.
In one embodiment of the present invention, the injection system 11 further comprises a flow controller (not shown) and an online mercury emission monitoring system 15. The mercury discharge online monitoring system 15 is positioned in an exhaust funnel 22 at the tail of the cement kiln 2 and is used for detecting the mercury content in the discharged flue gas in real time.
It should be noted that a kiln tail cloth bag dust collector 12 is arranged at the kiln tail of the cement kiln 2, before the exhaust flue gas at the kiln tail of the cement kiln 2 enters the kiln tail cloth bag dust collector 12, activated carbon powder is sprayed into an air inlet flue 21 at the kiln tail of the cement kiln 2 to remove mercury in the flue gas, then the demercuration flue gas enters the kiln tail cloth bag dust collector 12, dust in the flue gas enters the kiln tail cloth bag dust collector 12, and the demercuration flue gas is discharged from a kiln tail exhaust funnel 22 of the cement kiln 2.
As shown in figure 2, the gas phase inlet of the kiln tail cloth bag dust collector 12 is connected with the smoke outlet of the kiln tail of the cement kiln 2 through a pipeline, and the gas phase inlet is an air inlet flue 21 of the kiln tail of the cement kiln. The gas-phase outlet of the kiln tail cloth bag dust collector 12, namely the exhaust funnel 22 at the kiln tail of the cement kiln 2 is internally provided with a mercury discharge online monitoring system 15, which can detect the mercury content in the discharged flue gas in real time, including the concentration of mercury simple substance and mercury ions in the flue gas. The mercury emission on-line monitoring system 15 can adopt advanced and stable on-line monitoring systems in the United states, Germany and the like. And updating one total mercury data every 2-5 min by setting the mercury discharge online monitoring system, and starting the solid adsorbent injection system 11 when two continuous total mercury data exceed a mercury content set value. The national standard of the emission limit value of the mercury content of the tail flue gas of the cement kiln is 50 mu g/m3The utility model sets the mercury content set value as 30-50 mug/m3。
A flow controller is provided on injection line 115 for measuring activated carbon flow data within injection line 115.
Further, the flow controllers are electrically connected to the injector 117 and the online mercury emission monitoring 15 system, respectively. I.e., the flow controller, is electrically connected to both the injector 117 and the on-line mercury emission monitoring system 15. When the mercury content in the flue gas is higher than a set value, the flow controller is opened, the activated carbon is sprayed into the spraying pipeline 115 and the flue 21 in sequence, and when the mercury content in the flue gas is lower than the set value, the flow controller is closed, and the sprayer 117 stops spraying the activated carbon. The emission of mercury in the flue gas can be effectively reduced through activated carbon adsorption. The collected solids can subsequently be reused for cement production.
In one embodiment of the present invention, the injection system 11 further comprises a feeder 113. The blanking device 113 is arranged on the discharging pipe 112 and is used for outputting the activated carbon from the activated carbon blanking bin 111 and sequentially conveying the activated carbon into the discharging pipe 112 and the injection pipeline 115. The blanking device 113 can discharge the solid matters in the active carbon blanking bin 111 in time and ensure the sealing of the whole system.
In one embodiment of the present invention, the injection system 11 further includes a roots blower 114. A roots blower 114 is provided on the injection duct 115 for feeding activated carbon into the injection duct 115 by wind power. The roots blower 114 is a positive displacement rotary blower that compresses and delivers gas by relative motion of two or three lobed rotors within a cylinder.
In an embodiment of the present invention, the solid adsorbent spraying system 11 further includes a spray gun 116, the spray gun 116 is disposed at the end of the spraying pipe 115, and is used for inputting the activated carbon into the air inlet flue 21 at the tail of the cement kiln 2, so as to realize the spraying process of the powdered activated carbon by the shortest path. The injection pipeline 115 can be provided with a flow control system to control the injection amount of the spray gun 116, so that excessive addition or deficiency of the activated carbon is avoided, and the utilization rate of the activated carbon and the demercuration effect are improved.
Depending on the size of flue 21, spray guns 116 may be arranged in a single row or multiple rows along the radial direction of flue 21, and preferably multiple rows of spray guns 116 are arranged in parallel in flue 21 to improve the adsorption efficiency.
In one embodiment of the present invention, the injection pipe 115 is provided with a gas phase inlet, a solid phase inlet and a solid phase outlet, the gas phase inlet is provided with a roots blower 114, the solid phase inlet is connected with the discharge pipe 112, the solid phase outlet is connected with the spray gun 116, and the solid phase inlet is provided with an injector 117. Therefore, the active carbon powder can be directly sent into the injection pipeline 115 by the wind energy provided by the Roots blower 114, and the equipment integration design is realized.
In one embodiment of the present invention, the injection pipe 115 may be a rubber pipe or a stainless steel pipe. The rubber tube can be laid under different conditions, and the form and the length are flexible and changeable. The stainless steel pipe is suitable for permanent construction on site.
The utility model discloses a solid sorbent injection system 11's working process as follows:
at present, the mercury emission limit value of tail flue gas of a cement kiln is 50 mu g/m3And setting the mercury emission online monitoring system 15 to update one total mercury data every 4 min. When two consecutive mercury data exceed the set value of the control center (the set value is preferably 30 mug/m)3) At this time, the solid adsorbent injecting system 11 is started. The concrete is that the blanking device 113 is opened, the powdered activated carbon is discharged from the funnel opening at the bottom of the activated carbon blanking bin 111And the active carbon is discharged, sequentially passes through a discharge pipe 112 and an injection pipeline 115, enters the spray gun under the action of a Roots blower 114 and an injector 117, and the active carbon injection quantity is determined in an automatic or manual adjusting mode. When the continuous 10 total mercury data are lower than the set value of the control center (the set value is preferably 30 mug/m)3) And in the process, the solid adsorbent injection system 11 stops working, so that the real-time standard control of the mercury emission of the kiln tail flue gas is realized.
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 (10)
1. A solid adsorbent injection system is characterized by comprising an activated carbon blanking bin, a discharge pipe, an injection pipeline and an injector, wherein,
the active carbon blanking bin is funnel-shaped, the bottom of the active carbon blanking bin is provided with a funnel hole,
one end of the discharge pipe penetrates into the funnel hole, the other end of the discharge pipe is connected with the injection pipeline,
the ejector is arranged on the ejection pipeline and used for generating high-pressure airflow to output the activated carbon into the ejection pipeline.
2. The solid sorbent injection system of claim 1, wherein a terminal end of the injection conduit is located within an air intake flue at a kiln tail of the cement kiln.
3. The solid adsorbent injection system of claim 1, further comprising a flow controller and an on-line mercury emission monitoring system, wherein the on-line mercury emission monitoring system is located in an exhaust funnel at the tail of the cement kiln and is used for detecting the mercury content in the exhaust flue gas in real time,
the flow controller is arranged on the injection pipeline and is used for measuring the flow data of the activated carbon in the injection pipeline,
the flow controller is respectively electrically connected with the ejector and the mercury discharge online monitoring system, when the mercury content in the flue gas is higher than a set value, the flow controller is opened to eject the activated carbon into the ejection pipeline and the flue, and when the mercury content in the flue gas is lower than the set value, the flow controller is closed, and the ejector stops ejecting the activated carbon.
4. The solid sorbent injection system of claim 1, further comprising a downer disposed on the discharge tube for outputting activated carbon from the activated carbon hopper and sequentially delivering into the discharge tube and the injection conduit.
5. The solid sorbent injection system of claim 4, further comprising a roots blower disposed on the injection conduit for delivering activated carbon into the injection conduit via wind energy.
6. The solid sorbent injection system of claim 5, further comprising a lance disposed at a distal end of the injection conduit for delivering activated carbon into an air intake flue at a kiln tail of the cement kiln.
7. The solid sorbent injection system of claim 6, wherein the injection conduit is provided with a gas phase inlet provided with the roots blower, a solid phase inlet connected with the discharge tube and the injector provided at the solid phase inlet, and a solid phase outlet connected with the lance.
8. The solid sorbent injection system of claim 6 or 7, wherein the lances are arranged in one or more rows radially of the flue.
9. The solid sorbent injection system of claim 1, wherein the activated carbon sub-silo employs vacuum loading.
10. The solid sorbent injection system of claim 1, wherein the injection conduit is a rubber tube or a stainless steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921066813.5U CN210332184U (en) | 2019-07-09 | 2019-07-09 | Solid adsorbent injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921066813.5U CN210332184U (en) | 2019-07-09 | 2019-07-09 | Solid adsorbent injection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210332184U true CN210332184U (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921066813.5U Active CN210332184U (en) | 2019-07-09 | 2019-07-09 | Solid adsorbent injection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210332184U (en) |
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2019
- 2019-07-09 CN CN201921066813.5U patent/CN210332184U/en active Active
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