CN114471137A - A medicament powder injection system for handling domestic waste burns flue gas - Google Patents
A medicament powder injection system for handling domestic waste burns flue gas Download PDFInfo
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- CN114471137A CN114471137A CN202210248000.8A CN202210248000A CN114471137A CN 114471137 A CN114471137 A CN 114471137A CN 202210248000 A CN202210248000 A CN 202210248000A CN 114471137 A CN114471137 A CN 114471137A
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- flue gas
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- sliding
- medicament powder
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- 239000000843 powder Substances 0.000 title claims abstract description 127
- 239000003814 drug Substances 0.000 title claims abstract description 85
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 239000003546 flue gas Substances 0.000 title claims abstract description 69
- 238000002347 injection Methods 0.000 title claims abstract description 50
- 239000007924 injection Substances 0.000 title claims abstract description 50
- 239000010791 domestic waste Substances 0.000 title claims description 5
- 239000000463 material Substances 0.000 claims abstract description 86
- 238000005507 spraying Methods 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 239000000779 smoke Substances 0.000 claims abstract description 11
- 230000008602 contraction Effects 0.000 claims description 35
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims description 3
- 238000004056 waste incineration Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000007664 blowing Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 11
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- 239000007789 gas Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
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- 239000000126 substance Substances 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
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- 230000002349 favourable effect Effects 0.000 description 2
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- 241001330002 Bambuseae Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
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- 229910001385 heavy metal Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
Abstract
The embodiment of the invention provides a medicament powder injection system for treating household garbage incineration smoke, which comprises: the spraying device comprises a support frame and a spraying unit arranged on the support frame; the injection unit includes: storage jar, aggregate barrel, get material pipe, get material spiral, actuating mechanism, blanking pipe, guide part, shrink part and flue gas pipe. The embodiment of the invention can accurately control the flow of the medicament powder by controlling the rotating speed of the material taking screw during operation, and form a stable dilute phase conveying system in a medicament powder injection system through the entrainment action of compressed air, so that the medicament powder is injected into a flue gas pipe to participate in flue gas purification reaction with incineration flue gas; the feeding amount of the medicament powder is accurate and controllable, the adjustable range is large, the automatic control of the medicament powder is realized, and the consumption of compressed air is reduced.
Description
Technical Field
The invention relates to the technical field of household garbage incineration treatment, in particular to a medicament powder injection system for treating household garbage incineration smoke.
Background
The incineration treatment of urban and rural domestic garbage is an inevitable trend in the development level of the prior art. Due to the composition of the garbage and the complexity of combustion reaction, various harmful pollutants, namely pollution factors, exist in the incineration flue gas, and before the incineration flue gas is discharged, various pollution factors must be strictly treated until the emission standard is reached.
The treatment process of pollution factors in the waste incineration flue gas generally removes harmful pollutants in the flue gas by using methods such as physics, chemistry and the like. For example, the strong adsorption capacity of the activated carbon powder can be used to adsorb and remove pollution factors such as heavy metal ions in the flue gas, and the slaked lime powder and the liquid water matched with the slaked lime powder can be used to chemically remove acid gases such as sulfur dioxide and hydrogen chloride in the flue gas, and the like. Therefore, during the flue gas treatment process, it is often necessary to spray powdered reagents, such as adsorbents, reagents, etc., into the flue gas and to sufficiently mix the reagents with the flue gas so that the reagents can contact with the harmful pollutants in the flue gas to remove the harmful pollutants.
The domestic garbage incinerator has unstable furnace raising and extinguishing process, stable operation process, fluctuation of fume temperature, composition and flow rate in certain range, and especially in small and medium size incinerating system with relatively small heat capacity, and great fluctuation range of fume physical parameters. In order to achieve the ideal effect of treating pollutants in incineration flue gas and save the medicament, the amount and components of the medicament supplied to the flue gas should be changed accordingly.
Disclosure of Invention
The invention provides a medicament powder injection system for treating household garbage incineration smoke. The device realizes accurate and controllable feeding amount of the medicament powder, has large adjustable range of the dosage of the medicament powder, saves the consumption of compressed air, is favorable for improving the incineration flue gas purification treatment effect, and simultaneously realizes automatic control of a medicament powder injection system.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
a medicament powder injection system for treating household garbage incineration flue gas comprises: the device comprises a support frame (1) and an injection unit arranged on the support frame;
the injection unit includes:
the storage tank is arranged on the support frame and is suitable for storing medicament powder;
the end part of the material collecting barrel is communicated with the storage tank;
the material taking pipe is communicated with the material collecting barrel;
the material taking screw is arranged inside the pipeline of the material taking pipe;
the driving mechanism is connected with the material taking spiral and is suitable for driving the material taking spiral to rotate;
the blanking pipe is communicated with the material taking pipe, and the center line of the blanking pipe is intersected with or out of plane with the center line of the material taking pipe;
the guide part is arranged on the blanking pipe, and the center line of the guide part is intersected with the center line of the blanking pipe; the guide part comprises a guide pipe, a sliding blowing nozzle and a telescopic mechanism; the guide pipe is communicated with the blanking pipe; the sliding blowing nozzle is arranged in the guide pipe and is in sealing fit with the guide pipe; the telescopic mechanism is arranged outside the guide pipe, is connected with the sliding blow nozzle and is suitable for adjusting the position of the sliding blow nozzle in the guide pipe;
the contraction part is arranged on the blanking pipe, and the central line of the contraction part is superposed with the central line of the guide part; the contraction part comprises a contraction pipe, a choke, an expansion pipe and a powder conveying pipe which are connected in sequence; the inner wall of the shrinkage pipe is suitable for forming a material guiding gap with the sliding blowing nozzle, so that the medicament powder in the blanking pipe is blown into the shrinkage pipe by the sliding blowing nozzle through the material guiding gap, and then enters the throat pipe, the expansion pipe and the powder conveying pipe;
and the flue gas pipe is communicated with the powder conveying pipe.
Optionally, a mixing chamber is further provided on the blanking pipe: one end of the mixing cavity is provided with the shrinkage pipe, and the other end of the mixing cavity is provided with the guide pipe; a slag removal port is arranged below the mixing cavity;
the mixing chamber is provided with a threaded rod, the threaded rod is positioned outside the guide pipe, and the threaded rod is provided with a positioning nut and a locking nut.
Optionally, the sliding mouthpiece includes:
a sliding tube adapted to slide within the guide tube;
a nozzle disposed at an outlet end of the sliding tube;
one end of the compressed air pipe is communicated with the inlet end of the sliding pipe, and the other end of the compressed air pipe is suitable for inputting compressed air;
and the positioning rod is arranged on the outer side of the pipe wall of the sliding pipe and is connected with the telescopic mechanism.
Optionally, the outer side of the sliding tube is further provided with a positioning disc, and the sliding tube and the threaded rod both penetrate through the positioning disc.
Optionally, the nozzle has an outer conical surface, and an outer wall of an end of the outer conical surface is closely attached to an inner wall surface of the shrinkage pipe;
the inner wall of the outer conical surface forms a cavity which is divided into an accelerating section and a nozzle section; the accelerating section is positioned between the nozzle section and the contraction pipe, and the inner diameter of the accelerating section is uniformly reduced from the contraction pipe to the extension direction of the nozzle section;
the central lines of the outer conical surface, the accelerating section, the nozzle section and the shrinkage pipe are overlapped.
Optionally, the medicament powder injection system for treating the household garbage incineration flue gas further comprises a high-pressure air pipe; high-pressure air pipe one end with the storage jar links to each other, and the other end links to each other with high-pressure air source.
Optionally, the high-pressure air pipe is provided with an electromagnetic valve; and/or a pressure relief valve is arranged on the pressure balance pipe;
the solenoid valve is suitable for controlling a high-pressure air source to convey high-pressure air to the storage tank through the high-pressure air pipe.
Optionally, the medicament powder injection system for handling domestic waste burns flue gas still includes the pressure balance pipe, pressure balance pipe one end with the lateral wall of storage jar is established and is communicated with each other, the other end with the flue gas pipe communicate with each other.
Optionally, the medicament powder injection system for treating the household garbage incineration flue gas further comprises an observation port, and the observation port is arranged on the material taking pipe.
Optionally, the number of the injection units is multiple, the compressed air pipe of the first injection unit is suitable for inputting compressed air, the powder conveying pipe of the first injection unit is communicated with the compressed air pipe of the second injection unit, and so on, and the powder conveying pipe of the last injection unit is communicated with the flue gas pipe; alternatively, the first and second electrodes may be,
the spraying units are multiple, the guide pipe of each spraying unit is communicated with the compressed air pipe, and the powder conveying pipe of each spraying unit is communicated with the flue gas pipe.
The scheme of the invention at least comprises the following beneficial effects:
according to the scheme, the spraying device comprises a support frame and a spraying unit arranged on the support frame; the injection unit includes: storage jar, aggregate barrel, get material pipe, get material spiral, actuating mechanism, blanking pipe, guide part, shrink part and flue gas pipe. The scheme of the invention can realize strict control of the supply flow of various medicament powders by adjusting the rotating speed of the material taking screw, the supply flow of the medicament powders is accurate and controllable, the flow adjusting range is large, and the automatic control is easy to realize; meanwhile, the requirement that a plurality of medicament powders are sprayed into the incineration flue gas to participate in the purification reaction is met, the consumption of compressed air can be saved, and the total energy consumption is reduced; in addition, the size of the material guiding gap is controllable and adjustable, so that the material guiding gap has a wide application range to the change of the granularity and the density of the medicament powder, and particularly has good inclusion to impurities in the medicament powder; the system in the scheme of the invention has the advantages of high response speed, and good operation reliability, stability and maintainability.
Drawings
FIG. 1 shows a schematic structural diagram of a medicament powder injection system for treating household garbage incineration smoke according to an embodiment of the invention;
FIG. 2 shows a cross-sectional view from A-A in FIG. 1;
FIG. 3 shows a partial enlarged view of section I of the injection unit of FIG. 1 in an operating state;
FIG. 4 shows a partial enlarged view of section I of the spray unit of FIG. 1 in a non-operating state;
FIG. 5 shows a partial enlarged view of section II of FIG. 2;
FIG. 6 shows a schematic view of the construction of a sliding mouthpiece;
FIG. 7 shows a cross-sectional view from perspective B-B of FIG. 1;
FIG. 8 shows a partial enlarged view of section I in the operating state in which the mixing chamber is provided in FIG. 1;
FIG. 9 shows a schematic view of a sliding mouthpiece when a mixing chamber is provided;
FIG. 10 shows a cross-sectional view from the perspective C-C of FIG. 8;
fig. 11 is a schematic view showing a structure in the case where a plurality of ejection units are provided in the embodiment of the present invention.
Description of reference numerals:
1-a support frame; 2-a storage tank; 3-a material collecting barrel; 4-material taking pipe; 5-taking the material spirally; 6-a drive mechanism; 7-a blanking pipe; 71-a mixing chamber; 711-slag removal port; 712-a threaded rod; 713-a positioning nut; 714-locking nut; 8-a guide tube; 9-sliding blowing nozzle; 91-a sliding tube; 911-positioning plate; 92-a nozzle; 921-outer conical surface; 922-an acceleration section; 923-a nozzle section; 93-compressed air pipe; 94-positioning rod; 10-a telescoping mechanism; 11-a shrink tube; 12-a throat; 13-expanding the tube; 14-powder conveying pipe; 15-a flue gas pipe; 16-high pressure air pipe; 161-electromagnetic valve; 17-a pressure equalization tube; 18-a viewing port; a-medicament powder; b-high pressure air; c-compressed air; d-burning the flue gas; e-a material guiding gap; f-gas particle two-phase flow; g-chute.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1 to 7, the present invention provides a chemical powder injection system for treating smoke generated by burning household garbage, comprising: the device comprises a support frame 1 and an injection unit arranged on the support frame 1;
the injection unit includes:
a storage tank 2, wherein the storage tank 2 is arranged on the support frame 1 and is suitable for storing medicament powder a;
a material collecting barrel 3, wherein the end part of the material collecting barrel 3 is communicated with the storage tank 2;
the material taking pipe 4 is communicated with the material collecting barrel 3;
the material taking screw 5 is arranged inside the pipeline of the material taking pipe 4;
the driving mechanism 6 is connected with the material taking screw 5 and is suitable for driving the material taking screw 5 to rotate;
the blanking pipe 7 is communicated with the material taking pipe 4, and the center line of the blanking pipe 7 is intersected with or out of plane with the center line of the material taking pipe 4;
the guide part is arranged on the blanking pipe 7, and the center line of the guide part is intersected with the center line of the blanking pipe 7; the guide part comprises a guide pipe 8, a sliding blow nozzle 9 and a telescopic mechanism 10; the guide pipe 8 is communicated with the blanking pipe 7; the sliding blowing nozzle 9 is arranged in the guide pipe 8 and is in sealing fit with the guide pipe 8; the telescopic mechanism 10 is arranged outside the guide pipe 8, is connected with the sliding blow nozzle 9 and is suitable for adjusting the position of the sliding blow nozzle 9 in the guide pipe 8;
the contraction part is arranged on the blanking pipe 7, and the central line of the contraction part is superposed with the central line of the guide part; the contraction part comprises a contraction pipe 11, a throat pipe 12, an expansion pipe 13 and a powder conveying pipe 14 which are connected in sequence; the inner wall of the shrinkage pipe 11 is suitable for forming a material guiding gap e with the sliding blow nozzle 9, so that the medicament powder a in the blanking pipe 7 is blown into the shrinkage pipe 11 by the sliding blow nozzle 9 through the material guiding gap e, and then enters the throat pipe 12, the expansion pipe 13 and the powder conveying pipe 14;
and the flue gas pipe 15 is communicated with the powder conveying pipe 14.
In the embodiment, the support frame 1 is provided with the injection unit, the support frame 1 is used for fixedly connecting the injection unit to ensure the stability of the injection unit in the operation process, and the injection unit comprises a storage tank 2, a material collecting barrel 3, a material taking pipe 4, a material taking screw 5, a driving mechanism 6, a blanking pipe 7, a guide part, a contraction part and a flue gas pipe 15; wherein, the storage tank 2 is arranged on the support frame 1 and is used for storing the medicament powder a to be sprayed; the collecting barrel 3 is of a hollow structure, the end part of the collecting barrel is communicated with the storage tank 2, the collecting barrel 3 is also communicated with the material taking pipe 4, the material taking screw 5 is arranged inside the material taking pipe 4, the end part of the material taking screw 5 is connected with the driving mechanism 6, the driving mechanism 6 is used for driving the material taking screw 5 to rotate, and the material taking pipe 4 is also communicated with the blanking pipe 7; when the medicament powder a sequentially passes through the storage tank 2 and the material collecting barrel 3 to reach the interior of the material taking pipe 4, the medicament powder a falls into the blanking pipe 7 under the action of the driving mechanism 6 driving the material taking screw 5 to rotate;
when the structure size of a spiral conveyer consisting of the driving mechanism 6 and the material taking spiral 5 and the physical parameters of the medicament powder a are fixed, the conveying amount is a function of the rotating speed; further, when the amount of the medicine powder a to be delivered needs to be adjusted, the effect of adjusting the amount of the medicine powder a to be delivered can be achieved by adjusting the rotational speed of the drive mechanism 6;
the two sides of the blanking pipe 7 are respectively provided with a guide part and a contraction part, the center lines of the guide part and the contraction part are reunited, and the center lines of the guide part and the contraction part are intersected with the center line of the blanking pipe 7;
as shown in fig. 3 and 4, the guide part comprises a guide pipe 8, a sliding blowing nozzle 9 and a telescopic mechanism 10, wherein the guide pipe 8 is communicated with the blanking pipe 7, a chute g is arranged on the inner side wall of the guide pipe 8, the sliding blowing nozzle 9 is arranged in the guide pipe 8, and the sliding blowing nozzle 9 is in sealing fit with the guide pipe 8; a telescopic mechanism 10 is fixedly connected to the outer part of the guide pipe 8, and the telescopic mechanism 10 is used for adjusting the position of the sliding blow nozzle 9 in the guide pipe 8;
the contraction part comprises a contraction pipe 11, a throat pipe 12, an expansion pipe 13 and a powder conveying pipe 14 which are connected in sequence, a material guiding gap e is formed between the inner wall of the contraction pipe 11 and the sliding blow nozzle 9, so that the medicament powder a in the blanking pipe 7 is blown into the contraction pipe 11 through the material guiding gap e by the sliding blow nozzle 9, then enters the throat pipe 12, the expansion pipe 13 and the powder conveying pipe 14, and finally enters a flue gas pipe 15 communicated with the powder conveying pipe 14;
the material guiding gap e between the contraction part and the guide part has important influence on the mixing performance and smooth rolling performance of the medicament powder a and the compressed air c, and the medicament powder a has different and optimal material guiding gaps e when physical parameters such as particle size, density and the like of the medicament powder a are changed; therefore, the medicament powder a can be sprayed better by adaptively adjusting the size of the material guiding gap e;
specifically, the adjustment mode of the material guiding gap e is as follows: the telescopic mechanism 10 pushes the sliding blowing nozzle 9 to move in the guide pipe 8 through the positioning rod 94, so that the size of the material guiding gap e can be changed correspondingly; or, the position of the positioning nut 713 on the threaded rod 712 is adjusted, and then the positioning disc 911 of the sliding blow nozzle 9 is fixed through the locking nut 714, so that the size of the material guiding gap e is adjusted;
in addition, the above-mentioned shrink tube 11 is an airflow channel with gradually reduced cross-sectional area, and the end with larger cross-sectional area of the airflow channel is an inlet end, and the inlet end is communicated with the blanking pipe 7; the end with smaller cross section area is an outlet end which is communicated with the throat pipe 12;
the throat pipe 12 is an airflow channel with uniform cross-sectional area, the inlet end of the airflow channel of the throat pipe 12 is communicated with the contraction pipe 11, and the outlet end of the airflow channel is communicated with the expansion pipe 13;
the expanding pipe 13 is an airflow channel with gradually increased cross-sectional area, and one end with smaller cross-sectional area of the airflow channel is an inlet end which is communicated with the outlet end of the throat pipe 12; the end with larger cross section area is an outlet end which is communicated with the powder conveying pipe 14;
the center lines of the guide tube 8, the contracted tube 11, the sliding blow nozzle 9, the throat tube 12 and the expansion tube 13 are overlapped, and the center line of the blanking tube 7 is intersected with the center lines of the guide tube 8, the contracted tube 11, the sliding blow nozzle 9, the throat tube 12 and the expansion tube 13; the central line of the blanking pipe 7 is intersected or out-of-plane with the central line of the material taking pipe 4.
In an alternative embodiment of the invention, as shown in fig. 6, the sliding mouthpiece 9 comprises:
a sliding tube 91 adapted to slide inside said guide tube 8;
a nozzle 92, the nozzle 92 being provided at an outlet end of the sliding tube 91;
a compressed air pipe 93, one end of the compressed air pipe 93 is communicated with the inlet end of the sliding pipe 91, and the other end is suitable for inputting compressed air;
and a positioning rod 94, wherein the positioning rod 94 is arranged outside the tube wall of the sliding tube 91 and is connected with the telescopic mechanism 10.
In this embodiment, the sliding mouthpiece 9 includes a sliding tube 91, a nozzle 92, a compressed air tube 93 and a positioning rod 94, the outlet end of the sliding tube 91 is provided with the nozzle 92, the inlet end of the sliding tube 91 is communicated with one end of the compressed air tube 93, the other end of the compressed air tube 93 is used for inputting compressed air c, and the relative pressure of the compressed air c is preferably 30-100 kPa; when compressed air c is input into the sliding blow nozzle 9 through the compressed air pipe 93, the medicament powder a in the blanking pipe 7 is input into the flue gas pipe 15 through the blanking pipe 7, the contraction pipe 11, the throat pipe 12, the expansion pipe 13 and the powder conveying pipe 14 in sequence;
because the inner side wall of the guide tube 8 is provided with a sliding groove g, the positioning rod 94 passes through the sliding groove g and is arranged on the outer side of the tube wall of the sliding tube 91 and is connected with the telescopic mechanism 10.
In an alternative embodiment of the present invention, as shown in fig. 3, 8 and 6, the nozzle 92 has an outer conical surface 921, and an outer wall of an end portion of the outer conical surface 921 is closely attached to an inner wall surface of the shrink tube 11;
the inner wall of the outer conical surface 921 forms a cavity, and the cavity is divided into an acceleration section 922 and a spout section 923; the accelerating section 922 is located between the nozzle section 923 and the shrinkage pipe 11, and the inner diameter of the accelerating section 922 is uniformly reduced in the extending direction from the shrinkage pipe 11 to the nozzle section 923;
the central lines of the outer conical surface 921, the accelerating section 922, the nozzle section 923 and the shrink tube 11 are coincident.
In this embodiment, the nozzle 92 has an outer conical surface 921, the outer wall of the end of the outer conical surface 921 is tightly attached to the inner wall surface of the shrink tube 11, the outer conical surface 921 is an internal cavity structure, the cavity is divided into an acceleration section 922 and a nozzle section 923, the cross-sectional area of the acceleration section 922 is gradually reduced, and the cross-sectional area of the nozzle section 923 is uniform; the end with the larger cross-sectional area of the accelerating section 922 is an inlet end which is communicated with the sliding pipe 91, and the end with the smaller cross-sectional area of the accelerating section 922 is an outlet end which is communicated with the nozzle section 923; one end of the nozzle section 923 is communicated with the outlet end of the acceleration section 922, and the other end is communicated with the blanking pipe 7; the center line of the outer conical surface 921 is coaxial with the center line of the shrink tube 11.
It should be noted that, when the mixing cavity 71 is disposed on the down pipe 7, one end of the nozzle section 923 is communicated with the outlet end of the accelerating section 922, and the other end is communicated with the mixing cavity 71 on the down pipe 7.
As shown in FIG. 1, in an alternative embodiment of the present invention, a high pressure air pipe 16 is further included; the high-pressure air pipe 16 has one end connected to the storage tank 2 and the other end connected to a high-pressure air source.
In this embodiment, the storage tank 2 is further provided with a high-pressure air pipe 16 communicated with the inside of the storage tank, one end of the high-pressure air pipe 16 is communicated with the storage tank 2, and the other end of the high-pressure air pipe is connected with a high-pressure air source, and the relative pressure of the high-pressure air source is preferably 0.3-1.9 MPa.
As shown in fig. 2, in an alternative embodiment of the present invention, a pressure balance pipe 17 is further included, and one end of the pressure balance pipe 17 is communicated with the sidewall of the storage tank 2, and the other end is communicated with the flue gas pipe 15.
In this embodiment, the storage tank 2 is further provided with a pressure balance pipe 17 communicated with the inside of the storage tank, one end of the pressure balance pipe 17 is communicated with the side wall of the storage tank 2, the other end is communicated with the flue gas pipe 15, and the pressure balance pipe 17 is used for keeping the pressure in the storage tank 2 in a micro negative pressure state when the spraying unit operates.
As shown in fig. 1 and 2, in an alternative embodiment of the present invention, the high pressure air pipe 16 is provided with an electromagnetic valve 161; and/or a pressure relief valve is arranged on the pressure balance pipe 17;
the solenoid valve 161 is adapted to control a source of high pressure air to deliver high pressure air b to the storage tank 2 through the high pressure air pipe 16.
In this embodiment, when the high-pressure air pipe 16 is provided with the electromagnetic valve 161, the electromagnetic valve 161 is in a normally closed state, and when the medicament powder a flows unsmoothly or arches in the storage tank 2, the electromagnetic valve 161 can be controlled by opening the control system, the high-pressure air b enters the storage tank 2 through the high-pressure air pipe 16 to form high-speed air flow pulses attached to the inner wall of the storage tank 2, and the arch breaking is performed on the medicament powder a in the storage tank 2, so that the medicament powder a smoothly slides into the collecting barrel 3;
a pressure relief valve can be arranged on the pressure balance pipe 17, and the pressure relief valve can effectively prevent the air pressure inside the storage tank 2 from being fluctuated due to overlarge air pressure caused by airflow pulse of high-pressure air b entering the storage tank 2;
because the interior negative pressure that generally is of flue gas pipe 15, pressure balance pipe 17 is with storage jar 2 and flue gas pipe 15 intercommunication back, the pressure in the storage jar 2 also can be maintained at little negative pressure state, so both can effectively prevent that highly-compressed air b from getting into the inside of storage jar 2 and leading to air pressure to take place too big and produce undulantly, make it more accurate to get the volume that material spiral 5 carried medicament powder a, also can prevent to add the dust escape of raising when medicament powder a in the storage jar 2, be favorable to improving the internal environment of burning station.
As shown in fig. 5, in an alternative embodiment of the present invention, the present invention further includes a viewing port 18, and the viewing port 18 is disposed on the material taking pipe 4.
In this embodiment, through set up viewing aperture 18 on extracting pipe 4, be more convenient for understand the motion condition of medicament powder a in extracting pipe 4, when taking the emergence jam of spiral 5, can be used to observe or maintain through viewing aperture 18.
As shown in fig. 1, fig. 2 and fig. 7 to 10, in an alternative embodiment of the present invention, a mixing chamber 71 is further disposed on the down pipe 7: one end of the mixing cavity 71 is provided with the shrinkage pipe 11, and the other end is provided with the guide pipe 8; a slag cleaning port 711 is arranged below the mixing cavity 71;
a threaded rod 712 is arranged on the mixing chamber 71, the threaded rod 712 is positioned outside the guide tube 8, and a positioning nut 713 and a locking nut 714 are arranged on the threaded rod 712.
In this embodiment, the blanking pipe 7 may further include a mixing chamber 71, the mixing chamber 71 is communicated with the blanking pipe 7, two ends of the mixing chamber 71 are respectively provided with a contraction pipe 11 and a guide pipe 8, the contraction pipe 11 and the guide pipe 8 are communicated with the blanking pipe 7 through the mixing chamber 71, the inside of the guide pipe 8 is provided with a sliding blowing nozzle 9 in a sealing and matching manner, the contraction pipe 11 is sequentially communicated with the throat pipe 12, the expansion pipe 13 and the powder conveying pipe 14, and the sliding blowing nozzle 9 of the guide pipe 8 and the contraction pipe 11 have a material guiding gap e in the mixing chamber 71.
In an alternative embodiment of the present invention, a positioning disc 911 is further disposed on an outer side of the sliding tube 91, and both the sliding tube 91 and the threaded rod 712 pass through the positioning disc 911.
In this embodiment, a positioning plate 911 is disposed on an outer side of a tube wall of the sliding tube 91, as can be seen from fig. 9, the sliding tube 91 penetrates through the positioning plate 911 at a center of the positioning plate 911, at least one second through hole is uniformly distributed around the first through hole through which the sliding tube 91 penetrates, the second through hole is used for penetrating through the threaded rod 712, positioning nuts 713 and locking nuts 714 are disposed on two sides of the threaded rod 712, and the positioning nuts 713 and the locking nuts 714 are fastened to the threaded rod 712 through threads to respectively push and pull two sides of the positioning plate 911, so that the positioning plate 911 is clamped between the positioning nuts 713 and the locking nuts 714.
In an alternative embodiment of the present invention, as shown in fig. 11, there are a plurality of said spraying units, the compressed air pipe 93 of the first spraying unit is suitable for inputting compressed air c, the powder conveying pipe 14 of the first spraying unit is communicated with the compressed air pipe 93 of the second spraying unit, and so on, the powder conveying pipe 14 of the last spraying unit is communicated with the flue gas pipe 15; alternatively, the first and second electrodes may be,
the number of the injection units is multiple, the guide pipe 8 of each injection unit is respectively communicated with a compressed air pipe 93, and the powder conveying pipe 14 of each injection unit is respectively communicated with the flue gas pipe 15.
In this embodiment, the number of the spraying units can be multiple, when the spraying units are in a serial relationship, the compressed air pipe 93 of the first spraying unit is suitable for inputting the compressed air c, the powder conveying pipe 14 of the first spraying unit is communicated with the compressed air pipe 93 of the second spraying unit, and so on, the powder conveying pipe 14 of the last spraying unit is communicated with the flue gas pipe 15; when the spraying units are in parallel connection, the guide pipe 8 of each spraying unit is respectively communicated with the compressed air pipe 93, and the powder conveying pipe 14 of each spraying unit is respectively communicated with the flue gas pipe 15; by providing a plurality of injection units and controlling the operation of one or more injection units, the dose and composition of the powder a of the agent supplied into the flue pipe 15 can be adjusted.
As shown in fig. 1 to 6, the working principle of the operation of the agent powder injection system for treating the smoke generated by burning the household garbage is explained:
when the spraying unit arranged on the support frame 1 starts to work, the medicament powder a in the storage tank 2 slides into the material collecting barrel 3;
the driving mechanism 6 is started to drive the material taking screw 5 to rotate, and under the combined action of gravity and the material taking screw 5, the medicament powder a falls into the blanking pipe 7 in the vertical direction;
meanwhile, the compressed air c enters the sliding blowing nozzle 9 of the guiding part through the compressed air pipe 93 and is accelerated under the action of the accelerating section 922 and the nozzle section 923 of the sliding blowing nozzle 9, so that the static pressure of the medicament powder a is reduced, and a part of potential energy of the compressed air c is converted into kinetic energy;
when the compressed air c leaves the nozzle section 923, the compressed air c is injected into the shrinkage tube 11 at a high speed, and due to the injection effect, the medicament powder a entering the blanking tube 7 is carried into the shrinkage tube 11 by the compressed air c flowing at a high speed through the material guiding gap e to form a gas-particle two-phase flow f;
because the compressed air c is in the contact process of the medicament powder a, partial kinetic energy of the compressed air c is transferred to the medicament powder a, viscosity dissipation, throttling loss and the like, the flow rate of the compressed air c is reduced, and meanwhile, the conveying capacity of the medicament powder a is reduced;
in order to improve the conveying capacity of the compressed air c to the medicament powder a and enable the gas phase and the particle items in the gas particle two-phase flow f to be more uniformly mixed to form a relatively stable dilute phase conveying system, the flow rate of the gas particle two-phase flow f is increased again through the contraction pipe 11;
because the flow loss of the fluid in the pipeline is in direct proportion to the quadratic power of the flow velocity of the fluid, in order to reduce the flow loss, the gas-particle two-phase flow f forms a stable dilute-phase conveying system in the contraction pipe 11 and the throat pipe 12, then enters the expansion pipe 13 to properly reduce the flow velocity, then enters the powder conveying pipe 14, and enters the flue gas pipe 15 through the powder conveying pipe 14;
the air flow pressure in the flue gas pipe 15 is much lower than the pressure in the powder conveying pipe 14, and the gas particle two-phase flow f can expand after entering the flue gas pipe 15, so that the diffusion of the medicament powder a in the incineration flue gas d can be promoted, the medicament powder a and harmful pollutants in the incineration flue gas d can be fully contacted and removed, and the purpose of purification of the incineration flue gas d can be achieved.
As shown in fig. 1 to 6, the process of stopping the operation of the agent powder injection system for treating the incineration smoke of the household garbage is explained:
when the incineration flue gas d does not need to be sprayed into the medicament powder a in the storage tank 2 in a certain period of time or needs to be stopped, the medicament powder a is not sprayed by a spraying unit any more, the material taking screw 5 stops rotating, the telescopic mechanism 10 pushes the positioning rod 94, the sliding blow nozzle 9 slides in the guide pipe 8 until the outer conical surface 921 of the nozzle 92 is attached to the inner wall surface of the shrinkage pipe 11, the material guiding gap e disappears (namely the gap size of the material guiding gap e is 0), and the medicament powder a cannot enter the shrinkage pipe 11, so that the medicament powder a in the blanking pipe 7 can be effectively prevented from being mixed into the compressed air c, and the problems that the medicament powder a is humidified, hardened, arched, invalid and the like possibly caused by the external moisture entering the storage tank 2 through the medicament powder a can be effectively prevented.
The process of the medicament powder injection system for treating the household garbage incineration smoke when the system stops operating for a long time is explained:
when the injection unit needs to be stopped for a long time or the medicine powder a at the bottom of the blanking pipe 7 and/or in the mixing chamber 71 needs to be cleaned out due to accumulation of impurities and the like, the cleaning port 711 can be opened to clean the medicine powder a and the impurities accumulated at the bottom of the blanking pipe 7 and/or in the mixing chamber 71 out.
The operation process of the agent powder injection system for treating the household garbage incineration flue gas when injecting various different agent powders a is explained:
when a plurality of and/or multi-type medicament powders a need to be sprayed simultaneously in the purification treatment process of incineration flue gas d, a plurality of spraying units can be arranged, different medicament powders a are respectively arranged in different storage tanks 2, when the medicament powders a need to be sprayed into the incineration flue gas d, the corresponding telescopic mechanisms 10 of the medicament powders a can be started to pull the sliding blowing nozzle 9, so that the outer conical surface 921 of the nozzle 92 leaves the inner wall surface of the contraction pipe 11 to form a material guiding gap e, and the material taking screw 5 is driven by the driving mechanism 6, so that the medicament powders a can form new two-phase flow f of air particles under the action of compressed air c or two-phase flow f of air particles entering the sliding blowing nozzle 9, and finally enter the flue gas pipe 15 to participate in the purification reaction of the incineration flue gas d; since a plurality of spraying units are provided, the amount of supply and the composition of the chemical powder a participating in the purification reaction of the incineration flue gas d can be dynamically controlled by adjusting the amount of supply of the chemical powder a in each storage tank 2.
The embodiment of the invention comprises a support frame 1 and an injection unit arranged on the support frame 1; the injection unit includes: storage jar 2, aggregate section of thick bamboo 3, material taking pipe 4, material taking screw 5, actuating mechanism 6, blanking pipe 7, guide part, constriction part and flue gas pipe 15. The embodiment of the invention realizes the strict control of the feeding flow of various medicament powders a, the feeding flow of the medicament powders a is accurate and controllable, the flow regulation range is large, and the automatic control is easy to realize; meanwhile, the requirement that a plurality of medicament powders a are simultaneously sprayed into the incineration flue gas d to participate in the purification reaction is met, the consumption of the compressed air c can be saved, and the total energy consumption is reduced; in addition, the size of the material guiding gap is controllable and adjustable, so that the material guiding gap has a wide application range to the change of the granularity and the density of the medicament powder a, and particularly has good inclusion to impurities in the medicament powder a; the system in the scheme of the invention has the advantages of high response speed, and good operation reliability, stability and maintainability.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A medicament powder injection system for handling domestic waste burns flue gas which characterized in that includes: the device comprises a support frame (1) and an injection unit arranged on the support frame (1);
the injection unit includes:
a storage tank (2), said storage tank (2) being arranged on said support frame (1) and being adapted to store medicament powder;
the end part of the material collecting barrel (3) is communicated with the storage tank (2);
the material taking pipe (4), the material taking pipe (4) is communicated with the material collecting barrel (3);
the material taking screw (5), wherein the material taking screw (5) is arranged inside the pipeline of the material taking pipe (4);
the driving mechanism (6), the said driving mechanism (6) is connected with said reclaiming spiral (5), suitable for driving the said reclaiming spiral (5) to rotate;
the blanking pipe (7) is communicated with the material taking pipe (4), and the center line of the blanking pipe (7) is intersected with or out of plane with the center line of the material taking pipe (4);
the guide part is arranged on the blanking pipe (7), and the center line of the guide part is intersected with the center line of the blanking pipe (7); the guide part comprises a guide pipe (8), a sliding blow nozzle (9) and a telescopic mechanism (10); the guide pipe (8) is communicated with the blanking pipe (7); the sliding blow nozzle (9) is arranged in the guide pipe (8) and is in sealing fit with the guide pipe (8); the telescopic mechanism (10) is arranged outside the guide pipe (8), is connected with the sliding blow nozzle (9) and is suitable for adjusting the position of the sliding blow nozzle (9) in the guide pipe (8);
the contraction part is arranged on the blanking pipe (7), and the central line of the contraction part is superposed with the central line of the guide part; the contraction part comprises a contraction pipe (11), a throat pipe (12), an expansion pipe (13) and a powder conveying pipe (14) which are connected in sequence; the inner wall of the contraction pipe (11) is suitable for forming a material guiding gap with the sliding blow nozzle (9), so that the medicament powder in the blanking pipe (7) is blown into the contraction pipe (11) by the sliding blow nozzle (9) through the material guiding gap and further enters the throat pipe (12), the expansion pipe (13) and the powder conveying pipe (14);
the flue gas pipe (15), the flue gas pipe (15) with powder conveyer pipe (14) intercommunication.
2. The system for the treatment of household waste incineration fumes according to claim 1, characterized in that the sliding mouthpiece (9) comprises:
a sliding tube (91) adapted to slide within the guide tube (8);
a nozzle (92), the nozzle (92) being disposed at an outlet end of the sliding tube (91);
a compressed air pipe (93), one end of the compressed air pipe (93) is communicated with the inlet end of the sliding pipe (91), and the other end of the compressed air pipe is suitable for inputting compressed air;
and the positioning rod (94), the positioning rod (94) is arranged on the outer side of the tube wall of the sliding tube (91) and is connected with the telescopic mechanism (10).
3. The medicament powder injection system for treating the household garbage incineration smoke according to claim 2, wherein the nozzle (92) is provided with an outer conical surface (921), the outer wall of the end part of the outer conical surface (921) is tightly attached to the inner wall surface of the shrinkage pipe (11);
the inner wall of the outer conical surface (921) forms a cavity which is divided into an accelerating section (922) and a spout section (923); the accelerating section (922) is located between the nozzle section (923) and the shrinkage pipe (11), and the inner diameter of the accelerating section (922) is uniformly reduced in the extending direction from the shrinkage pipe (11) to the nozzle section (923);
the center lines of the outer conical surface (921), the accelerating section (922), the nozzle section (923) and the contraction pipe (11) are overlapped.
4. The system for spraying the agent powder used for treating the smoke generated by the incineration of the household garbage according to claim 1, further comprising a high-pressure air pipe (16); one end of the high-pressure air pipe (16) is connected with the storage tank (2), and the other end of the high-pressure air pipe is connected with a high-pressure air source.
5. The agent powder injection system for treating household garbage incineration flue gas as recited in claim 4, characterized in that the high pressure air pipe (16) is provided with an electromagnetic valve (161);
the solenoid valve (161) is adapted to control a source of high pressure air to deliver high pressure air to the storage tank (2) through the high pressure air pipe (16).
6. The medicament powder injection system for treating household garbage incineration flue gas as claimed in claim 1, further comprising a pressure balance pipe (17), wherein one end of the pressure balance pipe (17) is communicated with the side wall of the storage tank (2), and the other end of the pressure balance pipe is communicated with the flue gas pipe (15).
7. The medicament powder injection system for treating household garbage incineration flue gas as claimed in claim 1, further comprising an observation port (18), wherein the observation port (18) is arranged on the material taking pipe (4).
8. The medicament powder injection system for treating household garbage incineration flue gas as claimed in claim 2, wherein a mixing chamber (71) is further provided on the blanking pipe (7): one end of the mixing cavity (71) is provided with the shrinkage pipe (11), and the other end is provided with the guide pipe (8); a slag cleaning port (711) is arranged below the mixing cavity (71);
be equipped with threaded rod (712) on mixing chamber (71), threaded rod (712) are located the outside of stand pipe (8), just be equipped with set nut (713) and lock nut (714) on threaded rod (712).
9. The system for spraying the medicament powder for treating the smoke generated by the incineration of the household garbage as recited in claim 8, wherein a positioning disc (911) is further arranged on the outer side of the sliding tube (91), and the sliding tube (91) and the threaded rod (712) both penetrate through the positioning disc (911).
10. The system for spraying agent powder used for treating household garbage incineration flue gas as claimed in claim 2, wherein the spraying units are multiple, the compressed air pipe (93) of the first spraying unit is suitable for inputting compressed air, the powder conveying pipe (14) of the first spraying unit is communicated with the compressed air pipe (93) of the second spraying unit, and so on, and the powder conveying pipe (14) of the last spraying unit is communicated with the flue gas pipe (15); alternatively, the first and second electrodes may be,
the spraying units are multiple, a guide pipe (8) of each spraying unit is respectively communicated with a compressed air pipe (93), and the powder conveying pipe (14) of each spraying unit is respectively communicated with a flue gas pipe (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210248000.8A CN114471137A (en) | 2022-03-14 | 2022-03-14 | A medicament powder injection system for handling domestic waste burns flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210248000.8A CN114471137A (en) | 2022-03-14 | 2022-03-14 | A medicament powder injection system for handling domestic waste burns flue gas |
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| CN114471137A true CN114471137A (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210248000.8A Pending CN114471137A (en) | 2022-03-14 | 2022-03-14 | A medicament powder injection system for handling domestic waste burns flue gas |
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| CN213930938U (en) * | 2020-12-16 | 2021-08-10 | 北京中科润宇环保科技股份有限公司 | Baking soda dry powder pneumatic conveying and feeding device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202237788U (en) * | 2011-08-25 | 2012-05-30 | 福建省丰泉环保控股有限公司 | Double powder spraying device for refuse burning smoke purifying system |
| KR101404800B1 (en) * | 2013-12-19 | 2014-06-12 | 주식회사 에스엔 | Turbo reactor for acid gas removal |
| CN212236717U (en) * | 2020-03-27 | 2020-12-29 | 常州和艺翔环境工程有限公司 | Novel in-furnace deep denitration powder injection accelerator |
| CN212215118U (en) * | 2020-04-29 | 2020-12-25 | 江苏海澜正和环境科技有限公司 | Multi-working-condition powder injection device for waste incineration tail gas treatment |
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