Full-automatic desulfurization and denitrification device

Abstract

The utility model discloses a full-automatic desulfurization and denitrification device, which relates to the technical field of tail gas treatment and particularly comprises a pretreatment structure, a desulfurization structure and a denitrification structure. The tail gas exhaust end of the desulfurization structure is connected with the tail gas inlet end of the denitration structure through a heat exchanger, an exhaust fan is arranged at the exhaust end of the denitration structure, and the air outlet end of the exhaust fan is connected with the hot fluid inlet end of the heat exchanger through a heater. According to the full-automatic desulfurization and denitrification device, carbon dioxide in tail gas is removed by utilizing the pretreatment structure, and a desulfurizing agent is prevented from reacting with the carbon dioxide, so that the loss of the desulfurizing agent is reduced; the cyclone separator is adopted to realize full mixing of pretreated tail gas and a desulfurizing agent, the tail gas desulfurization effect is improved, gas-liquid separation is realized under the action of centrifugal force, and denitration treatment of the tail gas is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas treatment technical field, concretely is a kind of full automatic desulfurization and denitrification device. BACKGROUND

[0002] Industrial tail gas or automobile exhaust usually contains harmful substances (such as SO2, HC, NOx) etc., direct emission will cause pollution to environment, need to be handled.

[0003] In prior art, the method for removing SO2 and NOx in tail gas is semi-dry desulfurization and denitrification method, which uses sodium carbonate or limestone as desulfurizer, reacts with SO to generate sodium sulfate and sodium sulfite, and combines with SCR technology to reduce NOx to nitrogen and water under the action of catalyst. However, in the use process, sodium sulfite and sodium sulfate generated during desulfurization are easy to crystallize and precipitate, adhere to the surface of equipment and pipeline, causing blockage and corrosion; and sodium carbonate and limestone will react with carbon dioxide in tail gas, increasing the consumption of desulfurizer. Based on this, the present application provides a kind of full automatic desulfurization and denitrification device. SUMMARY

[0004] The utility model provides a kind of full automatic desulfurization and denitrification device, solve the problem that sodium sulfate and sodium sulfite generated during desulfurization are easy to crystallize and precipitate, adhere to the surface of equipment and pipeline, causing blockage and corrosion when using sodium carbonate or limestone as desulfurizer in the above background art;Sodium carbonate and limestone will react with carbon dioxide in tail gas, increasing the consumption of desulfurizer.

[0005] The utility model provides the following technical scheme: a kind of full automatic desulfurization and denitrification device, including pretreatment structure, desulfurization structure and denitrification structure, the tail gas entry end of desulfurization structure is connected with the tail gas exhaust end of pretreatment structure, the tail gas exhaust end of desulfurization structure is connected with the tail gas entry end of denitrification structure by heat exchanger, the exhaust end of denitrification structure is provided with exhaust fan, the air outlet end of exhaust fan is connected with the hot fluid inlet end of heat exchanger by heater;

[0006] The pretreatment structure includes adsorption tower and condenser, the inner chamber of adsorption tower is provided with carbon dioxide adsorbent, the air inlet end of adsorption tower is connected with tail gas inlet pipe, the air outlet end of adsorption tower is connected with the hot fluid inlet end of condenser by connecting pipe one, the hot fluid exhaust end of condenser is connected with desulfurization structure by connecting pipe two;

[0007] The desulfurization and denitrification structure comprises a cyclone separator and a temporary storage box arranged below the cyclone separator, a fixed cylinder is connected outside a fluid inlet end of the cyclone separator, a desulfurizing agent conveying pipe is fixedly connected to a middle part of an inner cavity of the fixed cylinder, an atomizing nozzle is arranged on a side of the desulfurizing agent conveying pipe close to the fluid inlet end of the cyclone separator, a uniform air distribution net plate is arranged on a side of the inner cavity of the fixed cylinder close to the fluid inlet end of the cyclone separator, an air inlet hole is arranged on an end of the fixed cylinder away from the uniform air distribution net plate, and another end of the connecting pipe two extends to the inner cavity of the fixed cylinder through the air inlet hole.

[0008] Preferably, the air inlet end of the air extractor is connected with the tail gas discharge end of the desulfurization and denitrification structure through an air extraction pipe, the air outlet end of the air extractor is connected with the air inlet end of the heater through a connecting pipe four, and the air outlet end of the heater is connected with the hot fluid inlet end of the heat exchanger through a connecting pipe five.

[0009] Preferably, a through hole is arranged in a middle part of the top of the temporary storage box, the discharge end of the cyclone separator is in an overlapping state with the through hole, the inner cavity of the temporary storage box is provided with a driving structure, the flushing rod is driven through the driving structure, and one side of the bottom end of the temporary storage box is provided with an electric ball valve.

[0010] Preferably, high-pressure nozzles are uniformly arranged on the outer surfaces of the flushing rods, a liquid inlet pipe is movably connected to the bottom of the flushing rod, the other end of the liquid inlet pipe extends to the outside of the temporary storage box, and the liquid inlet pipe is fixedly connected with the temporary storage box.

[0011] Preferably, an air exhaust hole is arranged in a middle part of the top of the cyclone separator, a connecting pipe three is arranged in the inner cavity of the air exhaust hole, the other end of the connecting pipe three is connected with the cold fluid inlet end of the heat exchanger, and the cold fluid discharge end of the heat exchanger is connected with the tail gas inlet end of the desulfurization and denitrification structure.

[0012] Preferably, a temperature sensor one is arranged on one end of the connecting pipe one, and a temperature sensor two is arranged on one end of the connecting pipe four.

[0013] Compared with the prior art, the desulfurization and denitrification device has the following beneficial effects:

[0014] 1. The full-automatic desulfurization and denitrification device removes carbon dioxide in tail gas by using the pretreatment structure, avoids the reaction of the desulfurizing agent and carbon dioxide, and reduces the loss of the desulfurizing agent; the cyclone separator is adopted to realize the full mixing of the pretreated tail gas and the desulfurizing agent, improve the tail gas desulfurization effect, and realize gas-liquid separation under the action of centrifugal force, thereby facilitating the denitrification treatment of the tail gas.

[0015] 2、The full-automatic desulfurization and denitrification device utilizes the air exhauster to pump the gas product of tail gas desulfurization and denitrification into the heater, utilizes the heater to heat the gas, and the heated gas enters the heat exchanger to exchange heat with the desulfurization tail gas, realizes the recovery of heat in the gas, and reduces the energy consumption of the device. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view of the structure of the utility model;

[0017] Figure 2 It is a back view of the structure of the utility model;

[0018] Figure 3 It is a schematic view of the inside of the adsorption tower of the structure of the utility model;

[0019] Figure 4 It is a schematic view of the inside of the desulfurization structure of the structure of the utility model;

[0020] Figure 5 It is a schematic view of the inside of the fixed cylinder of the structure of the utility model.

[0021] In the drawing: 1, adsorption tower; 2, condenser; 3, tail gas inlet pipe; 4, connecting pipe one; 5, cyclone separator; 6, denitration structure; 7, heat exchanger; 8, connecting pipe three; 9, temperature sensor one; 10, fixed cylinder; 11, connecting pipe two; 12, desulfurizer conveying pipe; 13, temporary storage box; 14, liquid inlet pipe; 15, electric ball valve; 16, heater; 17, air exhauster; 18, temperature sensor two; 19, connecting pipe five; 20, through hole; 21, carbon dioxide adsorbent; 22, atomizing nozzle; 23, exhaust hole; 24, flushing rod; 25, servo motor; 26, air distribution net plate; 27, air inlet hole; 28, connecting pipe four. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] The utility model provides an embodiment: please refer to Figures 1-5The utility model provides an automatic desulfurization and denitrification device, which comprises a pretreatment structure, a desulfurization structure and a denitrification structure 6, the pretreatment structure comprises an adsorption tower 1 and a condenser 2, the inner cavity of the adsorption tower 1 is provided with a carbon dioxide adsorbent 21, the air inlet end of the adsorption tower 1 is connected with a tail gas inlet pipe 3, the air outlet end of the adsorption tower 1 is connected with the hot fluid inlet end of the condenser 2 through a connecting pipe one 4, the hot fluid discharge end of the condenser 2 is connected with the desulfurization structure through a connecting pipe two 11, through the arrangement of the pretreatment structure, the tail gas to be treated can enter the inner cavity of the adsorption tower 1 through the tail gas inlet pipe 3, in the moving process of the adsorption tower 1, the carbon dioxide adsorbent 21 can adsorb carbon dioxide in the tail gas, so as to reduce the content of carbon dioxide in the tail gas, after the carbon in the tail gas is removed, the tail gas enters the condenser 2 through the connecting pipe one 4, the condenser cools the tail gas, so that the temperature of the tail gas is between the use temperature range of the desulfurizing agent, and the temperature of the tail gas is higher than the temperature at which the desulfurizing agent appears crystallization.

[0024] One end of the connecting pipe one 4 is provided with a temperature sensor one 9, through the arrangement of the temperature sensor one 9, the temperature of the pretreated tail gas can be detected in real time, the controller in the device can adjust the working frequency of the condenser 2 according to the detected tail gas temperature, so as to reduce the energy consumption of the condenser 2, the hot fluid discharge end of the condenser 2 is connected with the desulfurization structure through the connecting pipe two 11, and the tail gas cooled can enter the desulfurization structure through the connecting pipe two 11.

[0025] The denitrification structure 6 comprises a cyclone separator 5 and a temporary storage box 13 arranged below the cyclone separator 5, a through hole 20 is arranged at the middle of the top of the temporary storage box 13, the discharge end of the cyclone separator 5 and the through hole 20 are in an overlapping state, through the arrangement of the through hole 20, the inner cavity of the cyclone separator 5 and the inner cavity of the temporary storage box 13 are in a communication state, one side of the bottom end of the temporary storage box 13 is provided with an electric ball valve 15, when the electric ball valve 15 is in an open state, the liquid in the temporary storage box 13 can be discharged.

[0026] The fluid inlet side of the cyclone separator 5 is connected with a fixed cylinder 10, the middle part of the inner cavity of the fixed cylinder 10 is fixedly connected with a desulfurizing agent conveying pipe 12, the side close to the fluid inlet side of the cyclone separator 5 of the desulfurizing agent conveying pipe 12 is provided with an atomizing nozzle 22, the side close to the fluid inlet side of the cyclone separator 5 of the inner cavity of the fixed cylinder 10 is provided with an air uniformizing net plate 26, the end of the fixed cylinder 10 away from the air uniformizing net plate 26 is provided with an air inlet hole 27, the other end of the connecting pipe two 11 extends to the inner cavity of the fixed cylinder 10 through the air inlet hole 27, and the connecting pipe two 11 is located at the side of the air uniformizing net plate 26 away from the fluid inlet side of the cyclone separator 5. In use, the desulfurizing agent conveyed in the desulfurizing agent conveying pipe 12 can be sprayed to the cyclone separator 5 in a tangent direction through the atomizing nozzle 22, and the pretreated tail gas also enters the cyclone separator in a tangent direction, so that the tail gas and the atomized desulfurizing agent can fully contact in the rotating motion process in the cyclone separator, the tail gas desulfurization effect is improved, and the liquid generated after the reaction enters the temporary storage box 13 through the penetrating hole 20. The middle part of the top of the cyclone separator 5 is provided with an exhaust hole 23, the exhaust hole 23 is conical, the inner diameter of the bottom of the exhaust hole 23 is larger than the inner diameter of the top of the exhaust hole 23, the top end of the inner cavity of the exhaust hole 23 is provided with a connecting pipe three 8, the other end of the connecting pipe three 8 is connected with the cold fluid inlet end of the heat exchanger 7, the cold fluid outlet end of the heat exchanger 7 is connected with the tail gas inlet end of the denitration structure 6, the desulfurized tail gas enters the denitration structure 6 through the exhaust hole 23 and the connecting pipe three 8, and the denitration structure 6 adopts the SCR denitration technology to realize denitration of the tail gas. The working principle is the prior art, and details are not repeated here.

[0027] The desulfurization structure also comprises a flushing structure, the flushing structure comprises a flushing rod 24, the top end of the inner cavity of the temporary storage box 13 is movably connected with the flushing rod 24, the other end of the flushing rod 24 extends to the top end of the inner cavity of the cyclone separator 5, the outer surface of the flushing rod 24 is uniformly provided with a high-pressure nozzle, the bottom of the flushing rod 24 is movably connected with a liquid inlet pipe 14, the other end of the liquid inlet pipe 14 extends to the outside of the temporary storage box 13, and the liquid inlet pipe 14 is fixedly connected with the temporary storage box 13. The liquid for flushing the cyclone separator 5 can enter the inner cavity of the flushing rod 24 through the liquid inlet pipe 14, and the flushing liquid in the inner cavity of the flushing rod 24 is sprayed to the inner wall of the cyclone separator 5 through the high-pressure nozzle, so that the cyclone separator 5 is flushed.

[0028] The inner cavity of the temporary storage box 13 is provided with a driving structure, the flushing rod 24 is driven through the driving structure, for example Figure 4As shown, the driving structure includes a shell, the flushing rod 24 is in active connection with the shell, the inner cavity of the shell is provided with a servo motor 25, the output shaft of the servo motor 25 is connected with a gear one through a speed reducer, the outer ring of the flushing rod 24 is fixedly connected with a gear two, the gear one and the gear two are in meshing state, the servo motor 25 can drive the gear one connected therewith to rotate, the gear one can drive the flushing rod 24 to rotate through the gear two meshed therewith, and the flushing effect of the cyclone separator 5 is improved.

[0029] As known from the above description, in use, the pre-treatment structure is used to remove carbon dioxide in the tail gas, so as to avoid the reaction of the desulfurizing agent with the carbon dioxide, thereby reducing the loss of the desulfurizing agent; the cyclone separator is used to realize the full mixing of the pre-treated tail gas and the desulfurizing agent, thereby improving the tail gas desulfurization effect, and under the action of centrifugal force, the gas-liquid separation is realized, thereby facilitating the denitration treatment of the tail gas. The condenser 2 is used to adjust the temperature of the desulfurized tail gas, thereby avoiding the crystallization of the desulfurizing agent due to excessively high or low temperature during the mixing of the tail gas and the desulfurizing agent.

[0030] The inner wall of the cyclone separator 5 is provided with a corrosion-resistant coating, and the material of the corrosion-resistant coating can be selected according to requirements, which is not limited herein.

[0031] The exhaust end of the denitration structure 6 is provided with an air extractor 17, the air outlet end of the air extractor 17 is connected with the hot fluid inlet end of the heat exchanger 7 through a heater 16, the air inlet end of the air extractor 17 is connected with the tail gas exhaust end of the denitration structure 6 through an air extraction pipe, the air outlet end of the air extractor 17 is connected with the air inlet end of the heater 16 through a connecting pipe four 28, and the air outlet end of the heater 16 is connected with the hot fluid inlet end of the heat exchanger 7 through a connecting pipe five 19. Through the arrangement of the air extractor 17 and the heater 16, the air extractor 17 can blow the gas generated after the desulfurization and denitration of the tail gas into the heater 16. When the heater 16 is powered on, the gas entering the heater 16 is heated. The heated gas enters the heat exchanger 7 to exchange heat with the desulfurized tail gas, thereby improving the temperature of the desulfurized tail gas and facilitating the denitration treatment of the tail gas. One end of the connecting pipe four 28 is provided with a temperature sensor two 18. Through the arrangement of the temperature sensor two 18, the temperature sensor two 18 can detect the temperature of the treated gas. The controller in the device can control the working frequency of the heater 16 according to the detection result, so that the temperature of the gas heated by the heater 16 is the same as the temperature of the denitration tail gas.

[0032] In some embodiments of the present application, the carbon dioxide adsorbent is ZnH-MFU-4l, the temperature of the tail gas entering the adsorption tower 1 through the tail gas inlet pipe 3 is in the high temperature range of 200-400℃; the desulfurizing agent is sodium carbonate, and the temperature of the tail gas entering the cyclone separator 5 is 50-200℃; and the temperature of the desulfurized tail gas after heat exchange is 300-400℃.

[0033] The electric appliance elements involved in the present application are all prior art, and the person skilled in the art understands their connection mode, and through the person skilled in the art, all the electric appliance elements in the present application and their adapted power supply are connected through wires, and according to the actual situation, a suitable controller is selected to meet the control requirement, and the specific connection and control sequence are referred to the following description, the working sequence of the electric appliance elements is completed, and the detailed connection means is the prior art known in the art, and the working principle and process are mainly introduced below, and the electric appliance control is not described.

[0034] In summary: when the full-automatic desulfurization and denitrification device is used, the tail gas to be treated enters into the adsorption tower 1 through the tail gas inlet pipe 3, the carbon dioxide adsorbent 21 in the adsorption tower 1 adsorbs the carbon dioxide in the tail gas, the tail gas after carbon removal enters into the condenser 2 through the connecting pipe one 4, the condenser 2 cools the tail gas, the cooled tail gas enters into the cyclone separator 5 through the connecting pipe two 11, in the cyclone process, the tail gas and the desulfurizing agent can be fully mixed to improve the desulfurization effect of the tail gas, the desulfurized tail gas is separated from the liquid, and the dried tail gas is heated and then enters into the denitrification structure to be treated, the gas generated after the tail gas is denitrified enters into the heater 16 through the air blower 17, the heater 16 is powered to heat the gas, and the heated gas enters into the heat exchanger 7 to exchange heat with the desulfurized tail gas, so that the heat in the gas is recovered, and the energy consumption of the device is reduced.

[0035] In the use process of the present application, the temperature sensor one 9 is used to detect the temperature of the pretreated tail gas in real time, the temperature sensor two 18 is used to detect the denitrified gas in real time, the power of the condenser 2 and the heater 16 is dynamically adjusted, the energy consumption is reduced, and the automatic flushing of the cyclone separator 5 and the automatic liquid discharge of the temporary storage box 13 are realized, manual intervention is reduced, and automatic control is realized.

[0036] The standard parts used in the present application can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts in the prior art, the machinery, parts and equipment adopt the conventional types in the prior art, which will not be described in detail here, the contents not described in detail in the specification belong to the prior art known to the person skilled in the art, although the embodiments of the present application have been shown and described, it can be understood by the person skilled in the art that the embodiments can be changed, modified, replaced and modified in various ways without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A fully automated desulfurization and denitrification device, comprising a pretreatment structure, a desulfurization structure and a denitrification structure (6), characterized in that: The tail gas inlet end of the desulfurization structure is connected with the tail gas outlet end of the pretreatment structure, the tail gas outlet end of the desulfurization structure is connected with the tail gas inlet end of the denitration structure (6) through a heat exchanger (7), and the exhaust end of the denitration structure (6) is provided with an exhaust fan (17), and the air outlet end of the exhaust fan (17) is connected with the hot fluid inlet end of the heat exchanger (7) through a heater (16). The pretreatment structure comprises an adsorption tower (1) and a condenser (2), the inner cavity of the adsorption tower (1) is provided with a carbon dioxide adsorbent (21), the air inlet end of the adsorption tower (1) is connected with a tail gas inlet pipe (3), the air outlet end of the adsorption tower (1) is connected with the hot fluid inlet end of the condenser (2) through a connecting pipe (4), and the hot fluid outlet end of the condenser (2) is connected with the desulfurization structure through a connecting pipe (11). The denitration structure (6) comprises a cyclone separator (5) and a temporary storage box (13) arranged below the cyclone separator (5), the outer side of the fluid inlet end of the cyclone separator (5) is connected with a fixed cylinder (10), the inner cavity of the fixed cylinder (10) is fixedly connected with a desulfurizing agent conveying pipe (12) at the middle part, the desulfurizing agent conveying pipe (12) is provided with an atomizing nozzle (22) on the side close to the fluid inlet end of the cyclone separator (5), the inner cavity of the fixed cylinder (10) is provided with an air uniformizing net plate (26) on the side close to the fluid inlet end of the cyclone separator (5), the fixed cylinder (10) is provided with an air inlet hole (27) at the end away from the air uniformizing net plate (26), and the other end of the connecting pipe (11) extends to the inner cavity of the fixed cylinder (10) through the air inlet hole (27); the inner cavity of the cyclone separator (5) is in communication with the inner cavity of the temporary storage box (13), and the inner cavity of the temporary storage box (13) is movably connected with a flushing rod (24) at the top end.

2. The fully automated desulfurization and denitrification device according to claim 1, characterized in that: The air inlet end of the exhaust fan (17) is connected with the tail gas outlet end of the denitration structure (6) through an exhaust pipe, the air outlet end of the exhaust fan (17) is connected with the air inlet end of the heater (16) through a connecting pipe (28), and the air outlet end of the heater (16) is connected with the hot fluid inlet end of the heat exchanger (7) through a connecting pipe (19).

3. The fully automated desulfurization and denitrification device according to claim 1, characterized in that: The middle part of the top of the temporary storage box (13) is provided with a through hole (20), and the discharge end of the cyclone separator (5) is in an overlapping state with the through hole (20); the inner cavity of the temporary storage box (13) is provided with a driving structure, the flushing rod (24) is driven through the driving structure, and one side of the bottom end of the temporary storage box (13) is provided with an electric ball valve (15).

4. The fully automated desulfurization and denitrification device according to claim 1, characterized in that: The outer surface of the flushing rod (24) is uniformly provided with high-pressure nozzles, the bottom of the flushing rod (24) is movably connected with a liquid inlet pipe (14), the other end of the liquid inlet pipe (14) extends to the outside of the temporary storage box (13), and the liquid inlet pipe (14) is fixedly connected with the temporary storage box (13). The outer surface of the flushing rod (24) is uniformly provided with high-pressure nozzles, the bottom of the flushing rod (24) is movably connected with a liquid inlet pipe (14), the other end of the liquid inlet pipe (14) extends to the outside of the temporary storage box (13), and the liquid inlet pipe (14) is fixedly connected with the temporary storage box (13).

5. The fully automated desulfurization and denitrification device according to claim 1, characterized in that: The middle part of the top of the cyclone separator (5) is provided with an exhaust hole (23), and the top end of the inner cavity of the exhaust hole (23) is provided with a connecting pipe three (8), the other end of the connecting pipe three (8) is connected with the cold fluid inlet end of the heat exchanger (7), and the cold fluid discharge end of the heat exchanger (7) is connected with the tail gas inlet end of the denitration structure (6).

6. The fully automated desulfurization and denitrification device according to claim 2, characterized in that: One end of the connecting pipe one (4) is provided with a temperature sensor one (9), and one end of the connecting pipe four (28) is provided with a temperature sensor two (18).

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