Circulating alkali liquor absorption device for VOCs waste gas

Abstract

The utility model provides a circulating alkali liquor absorption device for VOCs waste gas, which comprises an absorption tower assembly, a sealing cover, an activated carbon adsorption plate and a demisting plate, the absorption tower assembly is internally provided with an absorption tower I for primarily treating the VOCs waste gas, and the right side of the absorption tower I is provided with an absorption tower II. Compared with the prior art, the VOCs waste gas treatment device has the following beneficial effects that the absorption tower assembly, the sealing cover, the activated carbon adsorption plate and the demisting plate are additionally arranged, the activated carbon adsorption plate and the demisting plate are of independent structures, are mounted in the adsorption seat and are hermetically connected and fixed by using the sealing cover, and VOCs waste gas is guided into the annular pipe through the gas inlet pipe; a VOCs waste gas walking path is improved, alkali liquor is sprayed out through a plurality of groups of atomizing nozzles, the waste gas subjected to primary treatment is guided into an absorption tower I, is guided out through a guide pipe, passes through an activated carbon adsorption plate and a demisting plate to improve the treatment effect, and is finally guided into an absorption tower II to be treated again, so that the VOCs waste gas treatment effect can be improved; and the annular pipe can be conveniently cleaned.

Description

TECHNICAL FIELD

[0001] The utility model belongs to VOCs waste gas treatment technical field, especially related to a kind of cyclic lye absorption device of VOCs waste gas. BACKGROUND

[0002] VOCs is a kind of waste gas from petroleum chemical industry, spraying industry, printing industry, pharmaceutical industry, automobile exhaust, building decoration materials and various industrial and daily life activities, VOCs waste gas direct emission can exist many problems, such as air quality deterioration, greenhouse effect and potential harm to human body, therefore, in production and life, VOCs waste gas needs corresponding absorption treatment, absorption method is to use liquid absorbent (such as water, lye, organic solvent) VOCs is separated from gas phase to liquid phase.In the lye absorption treatment device of VOCs waste gas, single processing structure can not be completely absorbed and processed, and the common VOCs waste gas lye absorption device has the problem that VOCs waste gas and lye contact time is limited, leading to insufficient VOCs waste gas processing time, and further causing VOCs waste gas processing incomplete problem, so that VOCs waste gas is not completely treated and discharged, cannot reach corresponding processing and emission standard.

[0003] As described above, VOCs waste gas lye absorption device that is not completely processed has some problems in use, so a new structure is needed to solve the above technical problems. INVENTION CONTENTS

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a kind of cyclic lye absorption device of VOCs waste gas, to solve the problems raised in the above background art.

[0005] The utility model discloses the following technical scheme realizes: a kind of cyclic lye absorption device of VOCs waste gas, comprising: absorption tower subassembly, seal cover, activated carbon adsorption plate and demisting plate, the absorption tower subassembly is equipped with the absorption tower one for first processing VOCs waste gas, the absorption tower one right side is equipped with absorption tower two, the absorption tower one is fixedly connected with the guide pipe for guiding VOCs waste gas between absorption tower two, the guide pipe middle position is fixedly connected with adsorption seat, the activated carbon adsorption plate is installed in the adsorption seat inboard left end, the demisting plate is installed in the adsorption seat inboard right end, the seal cover is installed above the adsorption seat.

[0006] As a preferred embodiment, the absorption tower one inboard top is fixedly connected with annular pipe for improving VOCs waste gas processing time, the annular pipe is annular structure and height decreases from start end to end, the annular pipe top is fixedly connected with the spray pipe for circulating guide.

[0007] As a preferred implementation, a plurality of groups of atomizing nozzles for spraying alkali liquor are fixedly connected below the spray pipe, the plurality of groups of atomizing nozzles are located on the upper end of the inner side of the annular pipe, the left upper end of the absorption tower is fixedly connected with an alkali liquor circulating pipe, the VOCs exhaust gas can be introduced into the annular pipe through the air inlet pipe to increase the walking path, and the alkali liquor is sprayed out through the plurality of groups of atomizing nozzles to improve the treatment effect.

[0008] As a preferred implementation, the lower end of the alkali liquor circulating pipe is in communication with the inner side of the lower end of the absorption tower, a circulating pump is installed below the alkali liquor circulating pipe, and the left side of the absorption tower is also fixedly connected with an air inlet pipe.

[0009] As a preferred implementation, the air inlet pipe is in communication with the annular pipe, a vertical pipe is fixedly connected to the inner side of the lower end of the second absorption tower, and a plurality of groups of branch pipes are fixedly connected to the outer side of the lower end of the vertical pipe.

[0010] A one-way valve for unidirectional discharge of VOCs exhaust gas is installed in the inner side of the branch pipe, an air outlet pipe is fixedly connected to the right upper side of the second absorption tower, the VOCs exhaust gas after the initial treatment is introduced into the second absorption tower through the guide pipe, and after being discharged through the branch pipe, the VOCs exhaust gas is subjected to re-treatment with the alkali liquor in the second absorption tower.

[0011] As a preferred implementation, two groups of installation grooves are formed in the upper surface of the adsorption seat, the activated carbon adsorption plate and the demisting plate are respectively installed in the inner side of the two groups of installation grooves, and the cover is fixedly connected with the adsorption seat by bolts.

[0012] As a preferred implementation, a cleaning pipe for introducing clean water is fixedly connected above the air inlet pipe, a control valve is installed in the inner side of the cleaning pipe, and a hidden box is fixedly connected to the lower end of the left rear side of the absorption tower.

[0013] As a preferred implementation, an electric telescopic rod is fixedly connected to the inner side of the hidden box, a sleeving ring is fixedly connected to the right side of the electric telescopic rod, a sewage guide pipe is fixedly connected to the inner side of the sleeving ring, and a receiving hopper for receiving sewage is fixedly connected above the sewage guide pipe, the cleaning pipe can introduce external clean water into the annular pipe, and the sewage is collected through the receiving hopper and then discharged through the sewage guide pipe.

[0014] The beneficial effects of the present application are as follows: through the increase of the absorption tower assembly, the cover, the activated carbon adsorption plate and the demisting plate, the activated carbon adsorption plate and the demisting plate are installed into the adsorption seat in an independent structure, and are fixed by the cover, the VOCs waste gas is introduced into the annular pipe through the air inlet pipe, the walking path of the VOCs waste gas is improved, and the alkali solution is sprayed out through the atomizing nozzles, the waste gas is introduced into the absorption tower one after the initial treatment, and the treatment effect is improved through the activated carbon adsorption plate and the demisting plate, and finally the waste gas is introduced into the absorption tower two for re-treatment, so that the VOCs waste gas treatment effect is improved, and the annular pipe can be conveniently cleaned through the increase of the absorption tower assembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Fig. 1 It is a whole structure schematic view of the present application of a VOCs waste gas circulating alkali solution absorption device.

[0017] Fig. 2 It is a structure schematic view of the present application of a VOCs waste gas circulating alkali solution absorption device removing the cover.

[0018] Fig. 3 It is a structure schematic view of the present application of an absorption tower assembly in a VOCs waste gas circulating alkali solution absorption device.

[0019] Fig. 4 It is a local sectional view schematic view of the present application of an absorption tower assembly in a VOCs waste gas circulating alkali solution absorption device.

[0020] In the figure, 100-absorption tower assembly, 101-absorption tower one, 102-air inlet pipe, 103-alkali solution circulating pipe, 104-circulating pump, 105-cleaning pipe, 106-annular pipe, 107-spraying pipe, 108-atomizing nozzle, 109-electric telescopic rod, 110-sleeved ring, 111-accepting hopper, 112-sewage guide pipe, 113-hidden box, 114-conveying pipe, 115-adsorption seat, 116-installation groove, 117-absorption tower two, 118-vertical pipe, 119-distributing pipe, 120-one-way valve, 121-air outlet pipe;

[0021] 200-cover;

[0022] 300-activated carbon adsorption plate;

[0023] 400 - demister plate. DETAILED DESCRIPTION

[0024] 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 scope of protection of the utility model.

[0025] Please refer to Figs. 1-4 The utility model provides a kind of technical solutions: a kind of VOCs exhaust gas's circulating lye absorption device, comprising: absorption tower subassembly 100, cover 200, activated carbon adsorption plate 300 and demister plate 400, absorption tower subassembly 100 is equipped with an absorption tower one 101 for VOCs exhaust gas is handled first, absorption tower one 101 right side is equipped with absorption tower two 117;

[0026] absorption tower one 101 and absorption tower two 117 are fixedly connected with the pipe 114 for guiding VOCs exhaust gas, the pipe 114 middle position is fixedly connected with adsorption seat 115, activated carbon adsorption plate 300 is installed in adsorption seat 115 inner side left end, adsorption seat 115 inner side right end is installed with demister plate 400, adsorption seat 115 top is installed with cover 200.

[0027] absorption tower one 101 inner side top is fixedly connected with the annular pipe 106 for improving VOCs exhaust gas processing time, annular pipe 106 is annular structure and height decreases from start end to end, annular pipe 106 top is fixedly connected with the spray pipe 107 for circulating guiding.

[0028] The spray pipe 107 below is fixedly connected with several groups of atomizing nozzles 108 for spraying lye, and several groups of atomizing nozzles 108 are all located in the inner side upper end of annular pipe 106, and the lye circulating pipe 103 is fixedly connected to the left upper end of absorption tower one 101, so that VOCs exhaust gas can be guided into annular pipe 106 to improve walking path through the gas inlet pipe 102, and lye can be sprayed to improve the treatment effect through several groups of atomizing nozzles 108.

[0029] The lower end of the lye circulating pipe 103 is in communication with the inner side of the lower end of the absorption tower one 101, and the circulating pump 104 is installed below the lye circulating pipe 103, and the gas inlet pipe 102 is also fixedly connected to the left side of the absorption tower one 101.

[0030] The gas inlet pipe 102 is in communication with the annular pipe 106, and the vertical pipe 118 is fixedly connected to the lower end of the inner side of the absorption tower two 117, and the outer side of the lower end of the vertical pipe 118 is fixedly connected with several groups of branch pipes 119.

[0031] A one-way valve 120 for unidirectional discharge of VOCs waste gas is installed inside the distribution pipe 119. An outlet pipe 121 is fixedly connected to the upper right side of the absorption tower 2 117. The VOCs waste gas after the initial treatment is introduced into the absorption tower 2 117 through the guide pipe 114, and then discharged through the distribution pipe 119 to complete the second treatment with the alkaline solution inside the absorption tower 2 117.

[0032] The upper surface of the adsorption seat 115 has two sets of mounting grooves 116. The activated carbon adsorption plate 300 and the demister plate 400 are respectively installed inside the two sets of mounting grooves 116. The cover 200 is connected and fixed to the adsorption seat 115 by bolts.

[0033] Please see Figs. 1-4 As the first embodiment of this utility model: First, the user introduces VOCs waste gas into the annular pipe 106 through the inlet pipe 102 to improve the travel path of the VOCs waste gas. The circulating pump 104 introduces the alkaline solution inside the first absorption tower 101 into the spray pipe 107 through the alkaline solution circulation pipe 103, and sprays the alkaline solution through several sets of atomizing nozzles 108. After the initial treatment, the waste gas is introduced into the first absorption tower 101 and then into the second absorption tower 117 through the guide pipe 114. Then, it is discharged from the alkaline solution inside the second absorption tower 117 through the distribution pipe 119 and the one-way valve 120 to complete the second treatment. Second, during the VOCs waste gas transmission through the guide pipe 114, the adsorption seat 115 is equipped with an activated carbon adsorption plate 300 and a demister plate 400. The activated carbon adsorption plate 300 further absorbs the waste gas, and the demister plate 400 can reduce the moisture content of the gas, thereby improving the VOCs waste gas treatment effect.

[0034] A cleaning pipe 105 for introducing cleaning water is fixedly connected above the air inlet pipe 102. A control valve is installed inside the cleaning pipe 105. A hidden box 113 is fixedly connected to the lower left rear side of the absorption tower 101.

[0035] An electric telescopic rod 109 is fixedly connected to the inside of the hidden box 113. A locking ring 110 is fixedly connected to the right side of the electric telescopic rod 109. A sewage conduit 112 is fixedly connected to the inside of the locking ring 110. A receiving hopper 111 for receiving sewage is fixedly connected above the sewage conduit 112. The cleaning pipe 105 can guide external cleaning water into the annular pipe 106, and after the sewage is collected by the receiving hopper 111, it is discharged out through the sewage conduit 112.

[0036] Please see Figs. 1-4As the second embodiment of the utility model: based on the above first embodiment, in the cleaning and overhauling, the user can start the electric telescopic rod 109 through the sleeve ring 110 to drive the sewage guide pipe 112 to move below the lower end of the annular pipe 106, and make the external clean water guide into the annular pipe 106 through the cleaning pipe 105, and the sewage after cleaning is collected through the receiving hopper 111, and then is guided out through the sewage guide pipe 112, so that the annular pipe 106 can be cleaned conveniently.

[0037] The above only is the preferred embodiment of the utility model, and does not use to limit the utility model, and any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be contained in the protection scope of the utility model.

Claims

1. A circulating caustic scrubbing apparatus for VOCs exhaust gas, comprising: The application discloses an absorption tower assembly (100), a cover (200), an activated carbon adsorption plate (300) and a demisting plate (400), characterized in that: the absorption tower assembly (100) is provided with an absorption tower I (101) for primary treatment of VOCs waste gas; the right side of the absorption tower I (101) is provided with an absorption tower II (117); The absorption tower I (101) and the absorption tower II (117) are fixedly connected with a guide pipe (114) for guiding VOCs waste gas, the middle position of the guide pipe (114) is fixedly connected with an adsorption seat (115), the left end of the inner side of the adsorption seat (115) is provided with the activated carbon adsorption plate (300), the right end of the inner side of the adsorption seat (115) is provided with the demisting plate (400), and the upper side of the adsorption seat (115) is provided with the cover (200).

2. The circulating caustic scrubber for VOCs exhaust gas according to claim 1, wherein: The upper side of the inner side of the absorption tower I (101) is fixedly connected with a ring-shaped pipe (106) for prolonging the treatment time of VOCs waste gas, the ring-shaped pipe (106) is in a ring-shaped structure and gradually decreases in height from the starting end to the terminal end, and the upper side of the ring-shaped pipe (106) is fixedly connected with a spraying pipe (107) for circulating guidance.

3. The circulating caustic scrubber for VOCs off-gas according to claim 2, wherein: The lower side of the spraying pipe (107) is fixedly connected with a plurality of groups of atomizing nozzles (108) for spraying alkali liquor, the plurality of groups of atomizing nozzles (108) are all located at the upper end of the inner side of the ring-shaped pipe (106), and the left upper end of the absorption tower I (101) is fixedly connected with an alkali liquor circulating pipe (103).

4. The circulating caustic solution absorber of VOCs off-gas as claimed in claim 3, wherein: The lower end of the alkali liquor circulating pipe (103) is in communication with the inner side of the lower end of the absorption tower I (101), a circulating pump (104) is arranged below the alkali liquor circulating pipe (103), and the left side of the absorption tower I (101) is further fixedly connected with an air inlet pipe (102).

5. The circulating caustic scrubber for VOCs exhaust gas according to claim 4, wherein: The air inlet pipe (102) is in communication with the ring-shaped pipe (106), the inner side of the lower end of the guide pipe (114) is fixedly connected with a vertical pipe (118) located in the inner side of the absorption tower II (117), and the outer side of the lower end of the vertical pipe (118) is fixedly connected with a plurality of groups of branch pipes (119). The inner side of the branch pipe (119) is provided with a one-way valve (120) for one-way guidance of VOCs waste gas, and the right upper side of the absorption tower II (117) is fixedly connected with an air outlet pipe (121).

6. The circulating caustic solution absorber of VOCs off-gas as claimed in claim 1, wherein: Two groups of mounting grooves (116) are formed in the upper surface of the adsorption seat (115), the activated carbon adsorption plate (300) and the demisting plate (400) are respectively arranged in the inner sides of the two groups of mounting grooves (116), and the cover (200) is fixedly connected with the adsorption seat (115) through bolts.

7. The circulating caustic solution absorber of VOCs off-gas as claimed in claim 4 wherein: The upper side of the air inlet pipe (102) is fixedly connected with a cleaning pipe (105) for guiding clean water, the inner side of the cleaning pipe (105) is provided with a control valve, and the left rear lower end of the absorption tower I (101) is fixedly connected with a hidden box (113).

8. The circulating caustic solution absorber of VOCs off-gas as claimed in claim 7, wherein: The inside of the hidden box (113) is fixedly connected with an electric telescopic rod (109), the right side of the electric telescopic rod (109) is fixedly connected with a sleeve ring (110), the inside of the sleeve ring (110) is fixedly connected with a sewage guide pipe (112), and the sewage guide pipe (112) is fixedly connected with a receiving hopper (111) above for receiving sewage.

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