Gas backflow device of ammonia desulfurization circulating tank

Abstract

The utility model relates to the technical field of ammonia-process flue gas desulfurization, and discloses an ammonia-process desulfurization circulating tank gas backflow device which comprises a desulfurization tower, and a backflow detection assembly is arranged on one side of the desulfurization tower. The detection backflow assembly comprises an air outlet pipe, a detection box, a concentration detection sensor, a flow guide box, an electric impeller, an exhaust pipe, an electromagnetic valve I, a backflow pipe and an electromagnetic valve II, and the air outlet pipe is arranged at the top end of the desulfurization tower. According to the gas backflow device of the ammonia desulfurization circulating tank, the detection backflow assembly is arranged, so that the sulfur concentration of purified flue gas can be detected, the flue gas which does not meet the emission standard flows back into the desulfurization tower again for secondary purification, and the desulfurized flue gas flows out of the top of the desulfurization tower and enters the detection box through the gas outlet pipe; the sulfur concentration in the flue gas is detected through the concentration detection sensor, and the flue gas which does not meet the emission standard is re-discharged into the desulfurization tower for secondary desulfurization.

Description

TECHNICAL FIELD

[0001] The utility model relates to ammonia method flue gas desulfurization technical field, concretely is a kind of ammonia method desulfurization circulating tank gas backflow device. BACKGROUND

[0002] Ammonia method flue gas desulfurization refers to the wet flue gas desulfurization process that amino substance is used as absorbent to remove sulfur dioxide in flue gas and recycle by-product, the process can not only desulfurize efficiently, but also can partially remove nitrogen oxides in flue gas, and by-product is ammonium sulfate, so that resource recycling can be realized, it is the most effective and environmental protection method to control acid rain and sulfur dioxide pollution.

[0003] According to the application number for 202022901491.0, a kind of ammonia method flue gas desulfurization device system, the device system of ammonia method flue gas desulfurization includes desulfurization tower, flue gas supply device, oxidizing gas supply device, spray liquid storage tank, scrubbing liquid storage tank and absorption slurry post-processing device;Desulfurization tower is from below to above along the axial direction, including slurry zone, first circulation zone, second circulation zone, third circulation zone and demisting zone arranged in sequence;Gas-liquid separation tray arranged between first circulation zone and second circulation zone is connected with spray liquid storage tank by spray slurry backflow pipeline;Gas-liquid separation tray arranged between second circulation zone and third circulation zone is connected with scrubbing liquid storage tank by scrubbing liquid backflow pipeline.The device system disclosed in the utility model can reduce the dosage of slurry by the mode of one tower and three circulations, effectively reduce the formation of aerogel by the mode of cascade circulation, and can realize the continuous output of ammonium sulfate.

[0004] There are still the following problems in actual use process:

[0005] Desulfurization tower is the most critical device in ammonia method flue gas desulfurization, and relies on desulfurization tower to effectively absorb sulfur dioxide in flue gas to purify flue gas, but the sulfur concentration of purified flue gas cannot be detected, whether it meets the emission standard cannot be determined, and flue gas that does not meet the emission standard cannot be re-purified. INVENTION CONTENTS

[0006] In view of the deficiencies of the prior art, the utility model provides an ammonia method desulfurization circulating tank gas backflow device, which has the advantages of being able to detect the sulfur concentration of purified flue gas and re-flowing flue gas that does not meet the emission standard into the desulfurization tower for secondary purification, solving the problems raised in the background art.

[0007] The utility model provides the following technical scheme: an ammonia method desulfurization circulating tank gas backflow device, comprising a desulfurization tower, a detection backflow assembly is arranged on one side of the desulfurization tower;

[0008] The detection backflow assembly comprises an air outlet pipe, a detection box, a concentration detection sensor, a flow guide box, an electric impeller, an exhaust pipe, an electromagnetic valve one, a backflow pipe, and an electromagnetic valve two.

[0009] Preferably, the surface of the desulfurization tower is fixedly connected with a mounting block, the inner walls of the two sides of the mounting block are both provided with a fixing assembly, and the inside of the mounting block is fixedly installed with a filter plate through the fixing assembly.

[0010] Preferably, the top of the desulfurization tower is fixedly connected with the air outlet pipe, the surface of the air outlet pipe is fixedly connected with the detection box, the inner wall of the detection box is fixedly connected with the concentration detection sensor, the bottom end of the air outlet pipe is fixedly connected with the flow guide box, the inner wall of the flow guide box is fixedly connected with the electric impeller, one side of the flow guide box is fixedly connected with the exhaust pipe, the surface of the exhaust pipe is fixedly connected with the electromagnetic valve one, the other side of the flow guide box is fixedly connected with the backflow pipe, and the surface of the backflow pipe is fixedly connected with the electromagnetic valve two.

[0011] Preferably, the fixing assembly comprises a groove, a connecting rod, a clamping block, a connecting plate, a spring, and a sliding block, the inner walls of the two sides of the mounting block are both provided with the groove, the inside of the groove is slidably connected with the connecting rod, one end of the connecting rod is fixedly connected with the clamping block, the other end of the connecting rod is fixedly connected with the connecting plate, the clamping block and the inner wall of the groove are fixedly connected with the spring, the upper and lower sides of the clamping block are both fixedly connected with the sliding block, and the clamping block is slidably connected with the groove through the sliding block.

[0012] Preferably, the surfaces of the two sides of the filter plate are both provided with a clamping groove.

[0013] Preferably, one side of the desulfurization tower is fixedly installed with a circulating pump, the input end of the circulating pump is located at the inner bottom of the desulfurization tower, the output end of the circulating pump is fixedly connected with a flow guide pipe, one end of the flow guide pipe is fixedly connected with a spraying pipe, and the bottom of the spraying pipe is installed with a plurality of spray heads.

[0014] Preferably, one side of the desulfurization tower is fixedly connected with an air inlet pipe, and one side of the desulfurization tower is fixedly connected with a feeding pipe.

[0015] Compared with the prior art, the desulfurization tower has the following beneficial effects:

[0016] 1. The ammonia desulfurization circulating tank gas backflow device, by setting the detection backflow assembly, the sulfur concentration of the purified flue gas can be detected, the flue gas that does not meet the emission standard is reflowed to the desulfurization tower for secondary purification, the desulfurized flue gas flows out from the top of the desulfurization tower and enters the detection box from the gas outlet pipe, the sulfur concentration in the flue gas is detected by the concentration detection sensor, and the flue gas that does not meet the emission standard is reflowed into the desulfurization tower for secondary desulfurization.

[0017] 2. The ammonia desulfurization circulating tank gas backflow device, by setting the fixing assembly, the filter plate can be installed and disassembled by clamping, and the installation and disassembly operation can be completed without using professional tools, so that personnel can conveniently clean the particles on the surface of the filter plate regularly. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The device overall structure diagram of the ammonia desulfurization circulating tank gas backflow device provided by the utility model is shown.

[0019] Figure 2 The detection backflow assembly structure diagram of the ammonia desulfurization circulating tank gas backflow device provided by the utility model is shown.

[0020] Figure 3 The desulfurization tower structure diagram of the ammonia desulfurization circulating tank gas backflow device provided by the utility model is shown.

[0021] Figure 4 The installation block internal structure diagram of the ammonia desulfurization circulating tank gas backflow device provided by the utility model is shown.

[0022] In the drawing: 1, desulfurization tower; 2, circulating pump; 3, flow guide pipe; 4, spray pipe; 5, spray head; 6, detection backflow assembly; 601, gas outlet pipe; 602, detection box; 603, concentration detection sensor; 604, flow guide box; 605, electric impeller; 606, exhaust pipe; 607, electromagnetic valve one; 608, backflow pipe; 609, electromagnetic valve two; 7, installation block; 8, fixing assembly; 801, groove; 802, connecting rod; 803, clamping block; 804, connecting plate; 805, spring; 806, sliding block; 9, filter plate; 10, clamping groove; 11, handle; 12, air inlet pipe; 13, feeding pipe. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to 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.

[0024] Please refer to Figures 1 to 2 The application discloses a kind of ammonia desulfurization circulating tank gas backflow devices, including desulfurization tower 1, one side of desulfurization tower 1 is provided with detection backflow component 6, detection backflow component 6 includes gas pipe 601, detection box 602, concentration detection sensor 603, guide box 604, electric impeller 605, exhaust pipe 606, electromagnetic valve one 607, backflow pipe 608, electromagnetic valve two 609, gas pipe 601 is arranged at the top of desulfurization tower 1, one end of gas pipe 601 is provided with detection box 602, the surface of detection box 602 is provided with concentration detection sensor 603, the bottom end of gas pipe 601 is provided with guide box 604, electric impeller 605 is arranged in guide box 604, one side of guide box 604 is provided with exhaust pipe 606, the surface of exhaust pipe 606 is provided with electromagnetic valve one 607, the other side of guide box 604 is provided with backflow pipe 608, and one end of backflow pipe 608 is located in the inside of desulfurization tower 1, and the surface of backflow pipe 608 is provided with electromagnetic valve two 609;

[0025] By being provided with detection backflow component 6, the sulfur concentration of flue gas after purification can be detected, and flue gas not meeting emission standards is reflowed into desulfurization tower 1 for secondary purification.

[0026] Please refer to Figures 1 to 2 Gas pipe 601 is fixedly connected with the top of desulfurization tower 1, detection box 602 is fixedly connected with the surface of gas pipe 601, concentration detection sensor 603 is fixedly connected with the inner wall of detection box 602, guide box 604 is fixedly connected with the bottom end of gas pipe 601, electric impeller 605 is fixedly connected with the inner wall of guide box 604, exhaust pipe 606 is fixedly connected with one side of guide box 604, electromagnetic valve one 607 is fixedly connected with the surface of exhaust pipe 606, backflow pipe 608 is fixedly connected with the other side of guide box 604, and electromagnetic valve two 609 is fixedly connected with the surface of backflow pipe 608.

[0027] Flue gas after desulfurization flows out from the top of desulfurization tower 1, and enters detection box 602 from gas pipe 601, and the sulfur concentration in flue gas is detected by concentration detection sensor 603, when the sulfur concentration detected does not meet the emission standard, detection box 602 sends a signal, closes electromagnetic valve one 607 and opens electromagnetic valve two 609, at this time, gas pipe 601, guide box 604 and backflow pipe 608 form a backflow route, and flue gas not meeting the emission standard is re-discharged into desulfurization tower 1 for secondary desulfurization.

[0028] Please refer to Figures 3 to 4The surface of the desulfurization tower 1 is fixedly connected with a mounting block 7, both side inner walls of the mounting block 7 are provided with fixing assemblies 8, the inside of the mounting block 7 is fixedly installed with filter plates 9 through the fixing assemblies 8, the fixing assembly 8 comprises a groove 801, a connecting rod 802, a clamping block 803, a connecting plate 804, a spring 805 and a sliding block 806, both side inner walls of the mounting block 7 are provided with the grooves 801, the connecting rods 802 are slidably connected into the grooves 801, one end of the connecting rod 802 is fixedly connected with the clamping block 803, the other end of the connecting rod 802 is fixedly connected with the connecting plate 804, the spring 805 is fixedly connected between the clamping block 803 and the inner wall of the groove 801, both sides of the clamping block 803 are fixedly connected with the sliding blocks 806, the clamping block 803 is slidably connected with the groove 801 through the sliding blocks 806, both sides surfaces of the filter plate 9 are provided with clamping grooves 10, and the filter plate 9 is fixedly connected with handles 11 outside the filter plate 9.

[0029] The fixing assembly 8 is arranged, the filter plate 9 can be installed and dismounted in the clamping mode, the installation and dismounting operation can be completed without using professional tools, and personnel can conveniently clean the particles on the surface of the filter plate 9 regularly.

[0030] Please refer to Figure 1 and Figure 3 One side of the desulfurization tower 1 is fixedly installed with a circulating pump 2, the input end of the circulating pump 2 is located at the inner bottom of the desulfurization tower 1, the output end of the circulating pump 2 is fixedly connected with a flow guide pipe 3, one end of the flow guide pipe 3 is fixedly connected with a spraying pipe 4, a plurality of spray heads 5 are installed at the bottom of the spraying pipe 4, one side of the desulfurization tower 1 is fixedly connected with an air inlet pipe 12, and one side of the desulfurization tower 1 is fixedly connected with a feeding pipe 13.

[0031] In the utility model, the working principle of the device is as follows:

[0032] In use, flue gas is introduced into the desulfurization tower 1 from the inlet pipe 12, and the flue gas is preliminarily filtered through the filter plate 9, and the desulfurizer is added from the feeding pipe 13, the desulfurizer is dissolved in water after being added, and then is pumped into the flow guide pipe 3 and the spray pipe 4 by the circulating pump 2, and finally is sprayed out through the spray head 5, and fully contacts with the flue gas to fully react and desulfurize the sulfur dioxide in the flue gas, and the desulfurized flue gas flows out from the top of the desulfurization tower 1 and is introduced into the outlet pipe 601, and then enters the detection box 602, and the sulfur concentration in the flue gas is detected by the concentration detection sensor 603, when the detected sulfur concentration does not meet the emission standard, the detection box 602 sends a signal, which is received by the external controller to close the electromagnetic valve one 607 and open the electromagnetic valve two 609 at the same time, at this time, the outlet pipe 601, the flow guide box 604 and the backflow pipe 608 form a backflow route, and the flue gas not meeting the emission standard is re-discharged into the desulfurization tower 1 for secondary desulfurization, and the flow speed of the flue gas in the pipeline can be accelerated by the electric impeller 605, when the emission standard is met, the electromagnetic valve one 607 is opened and the electromagnetic valve two 609 is closed at the same time, so that the flue gas is discharged from the exhaust pipe 606;

[0033] When the filter plate 9 needs to be disassembled and cleaned, the connecting plates 804 at both ends are pulled at the same time, the connecting rods 802 are horizontally moved, the clamping blocks 803 are horizontally moved, the springs 805 are compressed under stress, the clamping blocks 803 are retracted into the grooves 801, and the clamping blocks 803 are separated from the inside of the clamping grooves 10, the restriction on the filter plate 9 is released, and then the filter plate 9 can be pulled out by pulling the handle 11, so that the filter plate 9 can be cleaned and maintained, which is convenient for personnel operation and understanding.

[0034] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0035] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A gas reflux device for an ammonia-based desulfurization circulating tank, comprising a desulfurization tower (1), characterized in that, A reflux detection assembly (6) is provided on one side of the desulfurization tower (1); The detection and reflux assembly (6) includes an outlet pipe (601), a detection box (602), a concentration detection sensor (603), a flow guide box (604), an electric impeller (605), an exhaust pipe (606), a first solenoid valve (607), a reflux pipe (608), and a second solenoid valve (609). The outlet pipe (601) is located at the top of the desulfurization tower (1), and a detection box (602) is installed at one end of the outlet pipe (601). A concentration detection sensor (603) is installed on the surface of the detection box (602). The bottom end of the outlet pipe (601) is provided with a flow guide box (604), the inside of the flow guide box (604) is provided with an electric impeller (605), one side of the flow guide box (604) is provided with an exhaust pipe (606), the surface of the exhaust pipe (606) is provided with a solenoid valve one (607), the other side of the flow guide box (604) is provided with a return pipe (608), and one end of the return pipe (608) is located inside the desulfurization tower (1), the surface of the return pipe (608) is provided with a solenoid valve two (609).

2. The gas reflux device for an ammonia desulfurization circulating tank according to claim 1, characterized in that: The surface of the desulfurization tower (1) is fixedly connected to an installation block (7), and the inner walls on both sides of the installation block (7) are provided with fixing components (8). The interior of the installation block (7) is fixedly installed with a filter plate (9) through the fixing components (8), and the outer side of the filter plate (9) is fixedly connected with a handle (11).

3. The gas reflux device for an ammonia desulfurization circulating tank according to claim 1, characterized in that: The outlet pipe (601) is fixedly connected to the top of the desulfurization tower (1), the detection box (602) is fixedly connected to the surface of the outlet pipe (601), the concentration detection sensor (603) is fixedly connected to the inner wall of the detection box (602), the flow guide box (604) is fixedly connected to the bottom of the outlet pipe (601), the electric impeller (605) is fixedly connected to the inner wall of the flow guide box (604), the exhaust pipe (606) is fixedly connected to one side of the flow guide box (604), the first solenoid valve (607) is fixedly connected to the surface of the exhaust pipe (606), the return pipe (608) is fixedly connected to the other side of the flow guide box (604), and the second solenoid valve (609) is fixedly connected to the surface of the return pipe (608).

4. The gas reflux device for an ammonia desulfurization circulating tank according to claim 2, characterized in that: The fixing component (8) includes a groove (801), a connecting rod (802), a snap-fit ​​block (803), a connecting plate (804), a spring (805), and a slider (806). The inner walls of both sides of the mounting block (7) are provided with grooves (801). The connecting rod (802) is slidably connected inside the groove (801). One end of the connecting rod (802) is fixedly connected to the snap-fit ​​block (803), and the other end of the connecting rod (802) is fixedly connected to the connecting plate (804). The spring (805) is fixedly connected between the snap-fit ​​block (803) and the inner wall of the groove (801). The upper and lower sides of the snap-fit ​​block (803) are fixedly connected to the slider (806). The snap-fit ​​block (803) is slidably connected to the groove (801) through the slider (806).

5. The gas reflux device for an ammonia desulfurization circulating tank according to claim 2, characterized in that: The filter plate (9) has snap-fit ​​grooves (10) on both sides.

6. The gas reflux device for an ammonia desulfurization circulating tank according to claim 1, characterized in that: A circulating pump (2) is fixedly installed on one side of the desulfurization tower (1). The input end of the circulating pump (2) is located at the bottom of the desulfurization tower (1). A guide pipe (3) is fixedly connected to the output end of the circulating pump (2). A spray pipe (4) is fixedly connected to one end of the guide pipe (3). Several nozzles (5) are installed at the bottom of the spray pipe (4).

7. The gas reflux device for an ammonia desulfurization circulating tank according to claim 1, characterized in that: An air inlet pipe (12) is fixedly connected to one side of the desulfurization tower (1), and a feeding pipe (13) is fixedly connected to one side of the desulfurization tower (1).

Images