A smoke exhaust device for emulsion explosive production

Abstract

The utility model discloses a smoke exhaust device for emulsion explosive production, including a PLC controller and a melting chamber. The gas outlet of the melting chamber is connected to the first absorption tower and the second absorption tower in sequence through a condenser. The gas outlets of the first absorption tower and the second absorption tower are connected to the exhaust fan and the exhaust pipe in sequence through pipelines. The second absorption tower is connected to the air inlet of the first absorption tower through a circulating gas pipeline. Spraying mechanisms are arranged in the first absorption tower and the second absorption tower. A gas sensor is arranged in the melting chamber, and a first nitrogen oxide detector and a second nitrogen oxide detector are arranged at the gas outlets of the first absorption tower and the second absorption tower, respectively. The device can monitor the smoke concentration in the oil phase melting chamber of the emulsion explosive in real time, and according to the concentration, the smoke is discharged in time for treatment, which not only improves the safety of emulsion explosive production, but also avoids environmental pollution caused by toxic gases.

Description

Technical Field

[0001] The utility model relates to the technical field of emulsion explosive production, in particular to a smoke exhaust device for emulsion explosive production. Background Art

[0002] Emulsion explosives are composed of water phase and oil phase. When preparing, a latex matrix and a sensitizer aqueous solution are mixed to obtain a mixture. The sensitizer reacts to produce gas, which is evenly dispersed in the latex matrix to sensitize the latex matrix, thereby forming an emulsion explosive. The latex matrix is ​​prepared by emulsifying the oil phase, the water phase and the emulsifier. In the current production line, in the oil phase melting process, certain toxic and harmful gases are generated when the oil phase is melted. If not handled in time, it will not only pollute the atmosphere, but also threaten the safe production of emulsion explosives. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a smoke exhaust device for emulsion explosive production is provided, which can monitor the smoke concentration in the oil phase melting chamber of the emulsion explosive in real time and exhaust the smoke in time for treatment according to the concentration, thereby not only improving the safety of emulsion explosive production, but also avoiding environmental pollution by toxic gases.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A smoke exhaust device for emulsion explosive production, comprising a PLC controller and a melting chamber, wherein the gas outlet of the melting chamber is connected to a first absorption tower and a second absorption tower in sequence through a condenser, and the gas outlets of the first absorption tower and the second absorption tower are connected to an exhaust fan and an exhaust pipe in sequence through pipelines; the second absorption tower is connected to the gas inlet of the first absorption tower through a circulating gas pipeline; and a spray mechanism is arranged in the first absorption tower and the second absorption tower;

[0006] A gas sensor is provided in the melting chamber, a first nitrogen oxide detector is provided at the gas outlet of the first absorption tower, a second nitrogen oxide detector is provided at the gas outlet of the second absorption tower, and signal output ends of the gas sensor, the first nitrogen oxide detector and the second nitrogen oxide detector are connected to a PLC controller;

[0007] A first electric valve and a first exhaust fan are provided on the exhaust duct of the melting chamber; a second electric valve and a second exhaust fan are provided on the connecting pipe between the first absorption tower and the second absorption tower; a third electric valve is provided on the pipe connecting the first absorption tower and the exhaust duct, and a fourth electric valve is provided on the pipe connecting the second absorption tower and the exhaust duct; a circulating fan and a fifth electric valve are provided on the circulating gas pipeline; the control ends of the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, the fifth electric valve, the first exhaust fan, the second exhaust fan, the circulating fan and the exhaust fan are connected to the PLC controller.

[0008] As an improvement of the above technical solution, a plurality of large protrusions and small protrusions are provided on the side wall of the condenser, and the large protrusions and the small protrusions are arranged alternately.

[0009] As an improvement of the above technical solution, a porous filler layer is provided inside the first absorption tower and the second absorption tower.

[0010] As an improvement of the above technical solution, a first porous air distribution plate is provided inside the first absorption tower and the second absorption tower.

[0011] As an improvement of the above technical solution, a second porous air distribution plate is provided above the first porous air distribution plate inside the first absorption tower and the second absorption tower, and the holes on the second porous air distribution plate are staggered with the holes on the first porous air distribution plate.

[0012] As an improvement of the above technical solution, the spray mechanism includes a liquid inlet pipe and a plurality of spray heads connected to the liquid inlet pipe.

[0013] As an improvement of the above technical solution, the liquid storage tanks at the bottom of the first absorption tower and the second absorption tower are connected to the spray mechanism through a circulation pipeline and a circulation pump.

[0014] As an improvement on the above technical solution, a first pH sensor and a second pH sensor are respectively provided in the liquid storage tanks at the bottom of the first absorption tower and the second absorption tower, the discharge outlets of the first absorption tower and the second absorption tower are connected to the buffer tank through a discharge pipe, and a sixth electric valve and a seventh electric valve are respectively provided on the discharge pipes of the first absorption tower and the second absorption tower; the signal output ends of the first pH sensor and the second pH sensor and the control ends of the sixth electric valve and the seventh electric valve are all connected to the PLC controller.

[0015] As an improvement of the above technical solution, a first liquid level sensor and a second liquid level sensor are respectively provided in the liquid storage tanks at the bottom of the first absorption tower and the second absorption tower, and the signal output ends of the first liquid level sensor and the second liquid level sensor are connected to the PLC controller.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0017] The device monitors the concentration of nitrogen oxides in the gas at the top of the first absorption tower in real time through the first nitrogen oxide detector, and promptly feeds back the information to the PLC controller. The PLC controller analyzes the received information data. If the concentration of nitrogen oxides in the gas is low and meets the emission requirements, the exhaust fan and the third electric valve are opened, and the gas is discharged into the atmosphere through the exhaust pipe under the action of the exhaust fan; if the concentration of nitrogen oxides in the gas is too high, the second electric valve and the second exhaust fan are opened, and the gas is drawn into the second absorption tower for continued spraying treatment, thereby improving the treatment efficiency of toxic gases and being more environmentally friendly.

[0018] The device monitors the concentration of nitrogen oxides in the gas at the top of the second absorption tower in real time through the second nitrogen oxide detector, and feeds back the information to the PLC controller in time. The PLC controller analyzes the received information data. If the concentration of nitrogen oxides in the gas is low and meets the emission requirements, the exhaust fan and the fourth electric valve are opened, and the gas is discharged into the atmosphere through the exhaust pipe under the action of the exhaust fan; if the concentration of nitrogen oxides in the gas is too high, the fifth electric valve and the circulating fan are opened, and the gas re-enters the first absorption tower to continue to be sprayed and treated, which further improves the treatment efficiency of toxic gases and is more environmentally friendly.

[0019] The device also condenses the smoke discharged from the melting chamber through the condenser, so as to facilitate the subsequent spraying and absorption treatment thereof; the present invention also alternately arranges large protrusions and small protrusions on the inner wall of the condenser, and the smoke collides with the large protrusions and the small protrusions, thereby increasing the running length of the smoke in the condenser and improving the heat exchange efficiency in the condenser.

[0020] In this device, the holes on the second porous air distribution plate are arranged alternately with the holes on the first porous air distribution plate, so that the gas and the spray liquid are fully contacted and absorbed, thereby improving the gas absorption efficiency.

[0021] The liquid storage tanks at the bottom of the first absorption tower and the second absorption tower of the device are connected to the spray mechanism through a circulation pipeline and a circulation pump; the pH value of the liquid in the liquid storage tanks at the bottom of the first absorption tower and the second absorption tower is monitored in real time by the first pH sensor and the second pH sensor. If the pH value drops to a certain value, the sixth electric valve or the seventh electric valve can be automatically opened to discharge the absorption liquid in time for subsequent treatment.

[0022] The device also monitors the liquid level in the liquid storage tank at the bottom of the first absorption tower and the second absorption tower in real time through the first liquid level sensor and the second liquid level sensor. If the liquid level is too high, the sixth electric valve or the seventh electric valve is opened to discharge the absorption liquid in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0025] Figure 2 is a schematic diagram of the internal structure of the condenser of Example 1;

[0026] Figure 3 is a partial control schematic diagram of the device of Example 1;

[0027] In the figure, 1, PLC controller; 2, melting chamber; 3, first absorption tower; 4, second absorption tower; 5, exhaust fan; 6, exhaust pipe; 7, gas sensor; 8, first electric valve; 9, first exhaust fan; 10, first nitrogen oxide detector; 11, second electric valve; 12, second exhaust fan; 13, third electric valve; 14, condenser; 15, large protrusion; 16, small protrusion; 17, fourth electric valve; 18, circulation fan; 19, fifth electric valve; 20, second nitrogen oxide detector; 21, liquid inlet pipe; 22, spray head; 23, circulation pipeline; 24, circulation pump; 25, first pH sensor; 26, second pH sensor; 27, buffer tank; 28, sixth electric valve; 29, seventh electric valve; 30, porous filler layer; 31, first porous air distribution plate; 32, second porous air distribution plate; 33, first liquid level sensor; 34, second liquid level sensor. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0031] Example 1

[0032] like Figures 1 to 3 As shown, a smoke exhaust device for emulsion explosive production includes a PLC controller 1, a melting chamber 2, a first absorption tower 3, a second absorption tower 4, an exhaust fan 5 and an exhaust pipe 6;

[0033] like Figure 1 and Figure 3 As shown together, a gas sensor 7 is provided in the melting chamber 2, and a first electric valve 8 and a first exhaust fan 9 are provided on the connecting pipe between the melting chamber 2 and the first absorption tower 3; the signal output end of the gas sensor 7, the control end of the first electric valve 8 and the first exhaust fan 9 are connected to the PLC controller 1. When the gas sensor 7 detects that there is a certain concentration of smoke in the melting chamber 2, it will send a signal and transmit it to the PLC controller 1; the PLC controller 1 will then determine whether it is necessary to turn on the first exhaust fan 9 based on the received signal information. If the smoke concentration reaches a certain value, the first electric valve 8 and the first exhaust fan 9 will be opened to draw the smoke into the first absorption tower 3 for processing; until the gas sensor 7 detects that the smoke concentration in the melting chamber 2 drops to within the required range, the gas sensor 7 will transmit a signal to the PLC controller 1, and the PLC controller 1 controls the first exhaust fan 9 to be turned off.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown together, the outlet pipe of the first absorption tower 3 is connected to the exhaust pipe 6 and the second absorption tower 4 through two parallel pipes, a first nitrogen oxide detector 10 is provided at the outlet of the first absorption tower 3, a second electric valve 11 and a second exhaust fan 12 are provided on the connecting pipes of the first absorption tower 3 and the second absorption tower 4, and a third electric valve 13 is provided on the connecting pipe of the first absorption tower 3 and the exhaust pipe 6. The second electric valve 11, the third electric valve 13, the second exhaust fan 12, the control end of the exhaust fan 5 and the signal output end of the first nitrogen oxide detector 10 are all connected to the PLC controller 1.

[0035] Through the above-mentioned setting, the first nitrogen oxide detector 10 can monitor the nitrogen oxide concentration in the gas at the exhaust port of the first absorption tower 3 in real time, and transmit the signal to the PLC controller 1. If the nitrogen oxide concentration is lower than a certain value, the PLC controller 1 automatically controls the opening of the third electric valve 13 and the exhaust fan 5 according to the received signal, so that the gas is discharged into the atmosphere through the exhaust pipe 6; if the nitrogen oxide concentration in the gas at the exhaust port of the first absorption tower 3 is too high, the first nitrogen oxide detector 10 transmits a signal to the PLC controller 1, and the PLC control automatically controls the opening of the second electric valve 11 and the second exhaust fan 12 according to the received signal, so that the gas enters the second absorption tower 4 for absorption treatment.

[0036] In this embodiment, Figure 1 and Figure 2As shown, a condenser 14 is also provided on the connecting pipe between the melting chamber 2 and the first absorption tower 3, which can preliminarily cool the smoke discharged from the melting chamber 2 to facilitate subsequent absorption treatment. A plurality of large protrusions 15 and small protrusions 16 are provided on the inner wall of the condenser 14, and the large protrusions 15 and the small protrusions 16 are arranged alternately. The smoke entering the condenser 14 is dispersed in the collision with the large protrusions 15 and the small protrusions 16, which greatly improves the condensation efficiency.

[0037] like Figure 1 and Figure 3 As shown in common, the air outlet of the second absorption tower 4 is connected to the exhaust pipe 6 and the air inlet of the first absorption tower 3 respectively through two parallel pipes. A fourth electric valve 17 is also provided on the connecting pipe between the second absorption tower 4 and the exhaust pipe 6, and a circulating fan 18 and a fifth electric valve 19 are provided on the connecting pipe between the second absorption tower 4 and the air inlet of the first absorption tower 3; a second nitrogen oxide detector 20 is provided at the air outlet of the second absorption tower 4, and the signal output end of the second nitrogen oxide detector 20 and the control ends of the fourth electric valve 17, the fifth electric valve 19, the circulating fan 18, are all connected to the PLC controller 1.

[0038] Through the above-mentioned arrangement, the second nitrogen oxide detector 20 can monitor the concentration of nitrogen oxides at the air outlet of the second absorption tower 4 in real time. If the concentration of nitrogen oxides is low and meets the requirements, the PLC controller 1 will automatically control the opening of the exhaust fan 5 and the fourth electric valve 17 according to the received signal, and the gas discharged from the second absorption tower 4 is discharged into the atmosphere through the exhaust pipe 6 under the action of the exhaust fan 5; if the concentration of nitrogen oxides is high, the PLC control will automatically control the opening of the circulation fan 18 and the fifth electric valve 19 according to the received signal, and the gas discharged from the second absorption tower 4 will re-enter the first absorption tower 3 for spraying treatment again.

[0039] In this embodiment, Figure 1 and Figure 3 As shown in common, a spray mechanism is provided in the first absorption tower 3 and the second absorption tower 4; the spray mechanism includes a liquid inlet pipe 21 and a plurality of spray heads 22 connected to the liquid inlet pipe 21; the liquid storage tank at the bottom of the first absorption tower 3 and the second absorption tower 4 is connected to the spray mechanism through a circulation pipe 23 and a circulation pump 24. Further, a first pH sensor 25 and a second pH sensor 26 are provided in the liquid storage tank at the bottom of the first absorption tower 3 and the second absorption tower 4, respectively; the discharge ports of the first absorption tower 3 and the second absorption tower 4 are connected to a buffer tank 27 through a discharge pipe; the discharge pipes of the first absorption tower 3 and the second absorption tower 4 are provided with a sixth electric valve 28 and a seventh electric valve 29, respectively; the signal output ends of the first pH sensor 25 and the second pH sensor 26, and the control ends of the sixth electric valve 28 and the seventh electric valve 29 are all connected to the PLC controller 1.

[0040] Through the above arrangement, alkali solution is sprayed into the first absorption tower 3 and the second absorption tower 4 through the liquid inlet pipe 21 and the spray head 22 to absorb toxic gases such as nitrogen oxides in the smoke. The liquid storage tank collects the absorption liquid after spraying and absorption, and the first pH sensor 25 and the second pH sensor 26 respectively monitor the pH value of the absorption liquid in the liquid storage tank of the first absorption tower 3 and the liquid storage tank of the second absorption tower 4 in real time. If the pH reaches a certain value, the signal is transmitted to the PLC controller 1. The PLC controller 1 automatically controls the opening of the sixth electric valve 28 or the seventh electric valve 29 according to the received signal, and discharges the absorption liquid in the liquid storage tank into the buffer tank 27 for neutralization treatment.

[0041] In this embodiment, Figure 1 As shown, a porous filler layer 30 is disposed inside the first absorption tower 3 and the second absorption tower 4 .

[0042] In this embodiment, Figure 1 As shown, a first porous air distribution plate 31 is provided inside the first absorption tower 3 and the second absorption tower 4; further, a second porous air distribution plate 32 is provided above the first porous air distribution plate 31 inside the first absorption tower 3 and the second absorption tower 4, and the holes on the second porous air distribution plate 32 are alternately arranged with the holes on the first porous air distribution plate 31.

[0043] In this embodiment, a first liquid level sensor 33 and a second liquid level sensor 34 are respectively provided in the liquid storage tanks at the bottom of the first absorption tower 3 and the second absorption tower 4 , and the signal output ends of the first liquid level sensor 33 and the second liquid level sensor 34 are both connected to the PLC controller 1 .

[0044] In addition, it should be understood that after reading the contents taught in the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A smoke exhaust device for emulsion explosive production, characterized in that: It includes a PLC controller and a melting chamber, wherein the gas outlet of the melting chamber is connected to the first absorption tower and the second absorption tower in sequence, and the gas outlets of the first absorption tower and the second absorption tower are connected to the exhaust fan and the exhaust pipe in sequence through pipelines; the second absorption tower is connected to the gas inlet of the first absorption tower through a circulating gas pipeline; the first absorption tower and the second absorption tower are both provided with a spray mechanism; A gas sensor is provided in the melting chamber, a first nitrogen oxide detector is provided at the gas outlet of the first absorption tower, a second nitrogen oxide detector is provided at the gas outlet of the second absorption tower, and signal output ends of the gas sensor, the first nitrogen oxide detector and the second nitrogen oxide detector are connected to a PLC controller; A first electric valve and a first exhaust fan are provided on the exhaust duct of the melting chamber; a second electric valve and a second exhaust fan are provided on the connecting pipe between the first absorption tower and the second absorption tower; a third electric valve is provided on the pipe connecting the first absorption tower and the exhaust duct, and a fourth electric valve is provided on the pipe connecting the second absorption tower and the exhaust duct; a circulating fan and a fifth electric valve are provided on the circulating gas pipeline; the control ends of the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, the fifth electric valve, the first exhaust fan, the second exhaust fan, the circulating fan and the exhaust fan are connected to the PLC controller.

2. A smoke exhaust device for emulsion explosive production according to claim 1, characterized in that: A condenser is provided on the connecting pipeline between the melting chamber and the first absorption tower.

3. A smoke exhaust device for emulsion explosive production according to claim 2, characterized in that: A plurality of large protrusions and small protrusions are arranged on the inner wall of the condenser, and the large protrusions and the small protrusions are arranged alternately.

4. A smoke exhaust device for emulsion explosive production according to claim 1, characterized in that: The first absorption tower and the second absorption tower are both provided with porous filler layers.

5. A smoke exhaust device for emulsion explosive production according to claim 1, characterized in that: A first porous air distribution plate is disposed inside the first absorption tower and the second absorption tower.

6. A smoke exhaust device for emulsion explosive production according to claim 5, characterized in that: A second porous air distribution plate is provided above the first porous air distribution plate inside the first absorption tower and the second absorption tower, and the holes on the second porous air distribution plate are arranged alternately with the holes on the first porous air distribution plate.

7. A smoke exhaust device for emulsion explosive production according to claim 1, characterized in that: The spray mechanism comprises a liquid inlet pipe and a plurality of spray heads connected with the liquid inlet pipe.

8. A smoke exhaust device for emulsion explosive production according to claim 1, characterized in that: The liquid storage tanks at the bottom of the first absorption tower and the second absorption tower are connected with the spray mechanism through a circulation pipeline and a circulation pump.

9. A smoke exhaust device for emulsion explosive production according to claim 8, characterized in that: A first pH sensor and a second pH sensor are respectively provided in the liquid storage tanks at the bottom of the first absorption tower and the second absorption tower. The discharge outlets of the first absorption tower and the second absorption tower are connected to the buffer tank through a discharge pipe. A sixth electric valve and a seventh electric valve are respectively provided on the discharge pipes of the first absorption tower and the second absorption tower. The signal output ends of the first pH sensor and the second pH sensor and the control ends of the sixth electric valve and the seventh electric valve are all connected to the PLC controller.

10. A smoke exhaust device for emulsion explosive production according to claim 9, characterized in that: A first liquid level sensor and a second liquid level sensor are respectively provided in the liquid storage tanks at the bottom of the first absorption tower and the second absorption tower, and the signal output ends of the first liquid level sensor and the second liquid level sensor are both connected to the PLC controller.

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