Chlorine-containing volatile organic waste gas treatment system

Abstract

The utility model relates to a chlorine-containing volatile organic waste gas treatment system. The chlorine-containing volatile organic waste gas treatment system comprises a zeolite rotating wheel, an exhaust funnel, a heat exchanger, a preheater, a TO furnace, a quench tower, a water washing tower and an alkali washing oxidation tower, the exhaust funnel, the heat exchanger and the preheater are respectively connected with the zeolite rotating wheel; the TO furnace is respectively connected with the preheater and the heat exchanger; the quench tower is respectively connected with the preheater and the heat exchanger; the water washing tower is connected with the quench tower; and the alkali washing oxidation tower is respectively connected with the water washing tower and the exhaust funnel. Compared with the prior art, the concentration of the unorganized chlorine-containing waste gas is increased through concentration of the zeolite rotating wheel, the unorganized chlorine-containing waste gas and organized chlorine-containing waste gas enter the TO furnace to be combusted at the same time, fuel consumption is reduced, hydrogen chloride and by-product hydrochloric acid generated by combustion are recycled through the water scrubber, resource recycling is achieved, high-temperature flue gas at an outlet of the TO furnace is divided into two strands, one strand is used for preheating the waste gas, and the other strand is used for preheating the waste gas. One branch is used for heating desorption waste gas, so that flue gas waste heat is fully utilized.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment technical field especially is involved in a kind of chlorine-containing volatile organic waste gas treatment system. BACKGROUND

[0002] For fine chemical and pharmaceutical industry, it often involves the use of chlorine-containing chemicals, chlorine-containing volatile organic waste gas (chlorine-containing VOCs) is generated in the production process, and the concentration of unorganized chlorine-containing volatile organic waste gas is low, and the concentration of organized volatile organic waste gas is high, which brings certain difficulty to the treatment of waste gas.

[0003] Common volatile organic waste gas treatment processes include adsorption, absorption, thermal combustion, catalytic oxidation and condensation. Adsorption is suitable for low-concentration waste gas treatment; catalytic oxidation is not suitable for chlorine-containing volatile organic waste gas treatment, which can easily cause catalyst poisoning; and condensation treatment is difficult to meet the standards. Usually, a single treatment process cannot meet the standards, and a combined treatment process is needed. Thermal combustion can decompose chlorine-containing volatile organic waste gas into water, carbon dioxide, hydrogen chloride and a small amount of chlorine, which needs to be treated by water washing tower and alkali washing tower. In the alkali washing process, chlorine gas is easy to react with sodium hydroxide to generate sodium hypochlorite, which is unstable in wastewater and needs further treatment.

[0004] CN212594845U discloses an organic waste gas treatment system based on zeolite runner, which includes a zeolite runner, a heater, a catalytic combustion device and a preheater. The zeolite runner is provided with a desorption zone and a cooling zone, and a desorption inlet and a desorption outlet are arranged opposite to the desorption zone. The desorption inlet is connected to the heater through a pipeline, and the desorption outlet is connected to the gas inlet of the catalytic combustion device through a pipeline. The exhaust port of the catalytic combustion device is connected to the preheater, and the preheater is connected to the cooling zone through a pipeline, so that the heated gas is cooled in the preheater and the cooled gas is introduced into the cooling zone. The preheater is connected to the heater through a pipeline to provide heat for the heater, thereby reducing the energy consumption in the desorption process. However, the organic waste gas treatment system in CN212594845U lacks a recycling device and does not consider resource recycling. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve the defects in the prior art and provides a chlorine-containing volatile organic waste gas treatment system. The concentration of unorganized chlorine-containing waste gas is low, the waste gas concentration is improved by zeolite runner concentration, the chlorine-containing waste gas is burned in the TO furnace at the same time, the fuel consumption is reduced, the hydrogen chloride generated by water washing tower is recycled, the byproduct hydrochloric acid is obtained, the resource recycling is realized, the high-temperature flue gas at the outlet of the TO furnace is divided into two streams, one stream is used for preheating waste gas, and the other stream is used for heating desorption waste gas, and the waste heat of flue gas is fully utilized.

[0006] The utility model discloses a purpose can be realized through the following technical scheme:

[0007] The utility model discloses a purpose is to provide a kind of volatile organic waste gas containing chlorine treatment system, volatile organic waste gas containing chlorine treatment system includes zeolite runner, exhaust cylinder, heat exchanger, preheater, TO furnace, quench tower, water scrubbing tower, alkali washing oxidation tower;The zeolite runner is used to obtain the purified gas after adsorption and the flue gas after alkali washing oxidation tower treatment after being adsorbed to unorganized chlorine-containing waste gas;The exhaust cylinder is connected with zeolite runner, and the exhaust cylinder is used to discharge the purified gas after adsorption;The heat exchanger is connected with zeolite runner, and the heat exchanger is used to enter zeolite runner after being heated to unorganized chlorine-containing waste gas using the high-temperature flue gas of TO furnace outlet and obtains the desorption unorganized chlorine-containing waste gas of desorption;The preheater is connected with zeolite runner, and the preheater is used to preheat the mixed waste gas after mixing unorganized chlorine-containing waste gas and organized chlorine-containing waste gas;TO furnace is connected with preheater, heat exchanger respectively, and TO furnace is used to heat the mixed waste gas after preheating and obtains flue gas, one flue gas enters preheater and preheats the mixed waste gas of TO furnace inlet, and another flue gas enters heat exchanger and heats the desorption unorganized chlorine-containing waste gas;The quench tower is connected with preheater, heat exchanger respectively, and the quench tower is used to reduce the temperature of flue gas;The water scrubbing tower is connected with quench tower, and the water scrubbing tower is used to absorb hydrogen chloride in the flue gas after cooling;Alkali washing oxidation tower is connected with water scrubbing tower, exhaust cylinder respectively, and alkali washing oxidation tower is used to further process the flue gas after water scrubbing tower treatment, and the flue gas after processing enters exhaust cylinder.

[0008] Further, the TO furnace is a direct-fired waste gas combustion furnace.

[0009] Further, the volatile organic waste gas containing chlorine includes unorganized chlorine-containing waste gas, organized chlorine-containing waste gas.

[0010] Further, the volatile organic waste gas containing chlorine treatment system further includes hydrochloric acid storage tank;The hydrochloric acid storage tank is connected with water scrubbing tower, and the hydrochloric acid storage tank is used to store the hydrochloric acid discharged by water scrubbing tower.

[0011] Further, the volatile organic waste gas containing chlorine treatment system further includes wastewater storage tank;The wastewater storage tank is connected with alkali washing oxidation tower, and the wastewater storage tank is used to store the wastewater discharged by alkali washing oxidation tower.

[0012] Further, the volatile organic waste gas containing chlorine treatment system further includes water scrubbing tower circulating pump;The water scrubbing tower circulating pump is connected with water scrubbing tower;The water scrubbing tower circulating pump is connected with hydrochloric acid storage tank.

[0013] Further, the chlorine-containing volatile organic waste gas treatment system further comprises an alkali washing oxidation tower circulating pump; the alkali washing oxidation tower circulating pump is connected with the alkali washing oxidation tower; and the alkali washing oxidation tower circulating pump is connected with the waste water storage tank.

[0014] Further, the chlorine-containing volatile organic waste gas treatment system further comprises a quenching tower circulating pump; the quenching tower circulating pump is connected with the quenching tower.

[0015] Further, a system fan is arranged between the alkali washing oxidation tower and the exhaust cylinder, and the system fan is used for conveying the treated flue gas.

[0016] Further, the zeolite runner comprises a zeolite runner adsorption zone, a zeolite runner cooling zone and a zeolite runner desorption zone; the zeolite runner adsorption zone is connected with the exhaust cylinder, and the zeolite runner adsorption zone is used for adsorbing the unorganized chlorine-containing waste gas to obtain the purified gas after adsorption; the zeolite runner cooling zone is connected with the inlet of the heat exchanger, and the zeolite runner cooling zone is used for conveying the unorganized chlorine-containing waste gas into the heat exchanger for heating; and the zeolite runner desorption zone is connected with the outlet of the heat exchanger and the preheater respectively, and the zeolite runner desorption zone is used for desorbing the heated unorganized chlorine-containing waste gas.

[0017] Further, a desorption fan is arranged between the zeolite runner and the preheater, and the desorption fan is used for conveying the desorbed unorganized chlorine-containing waste gas.

[0018] Further, an adsorption fan is arranged between the zeolite runner and the exhaust cylinder, and the adsorption fan is used for conveying the purified gas after adsorption.

[0019] Further, one side of the zeolite runner adsorption zone is connected with a pipeline for conveying the unorganized chlorine-containing waste gas, and the other side is connected with the inlet of the exhaust cylinder through a pipeline provided with the adsorption fan.

[0020] Further, one side of the zeolite runner cooling zone is connected with a pipeline for conveying the unorganized chlorine-containing waste gas, and the other side is connected with the inlet of the heat exchanger through a pipeline.

[0021] Further, one side of the zeolite runner desorption zone is connected with the outlet of the heat exchanger through a pipeline, and the other side is connected with the inlet of the preheater through a pipeline provided with the desorption fan.

[0022] Further, a pipeline for conveying the organized chlorine-containing waste gas is connected with the inlet of the preheater.

[0023] Further, the inlet of the water washing tower circulating pump is connected with the outlet of the lower part of the water washing tower through a pipeline, the outlet of the water washing tower circulating pump is connected with the inlet of the upper part of the water washing tower through a pipeline, so as to convey the circulating liquid for spraying; and the outlet of the water washing tower circulating pump is connected with the hydrochloric acid storage tank.

[0024] Further, the inlet of the caustic washing oxidation tower circulating pump is connected with the outlet of the lower part of the caustic washing oxidation tower through a pipeline, the outlet of the caustic washing oxidation tower circulating pump is connected with the inlet of the upper part of the caustic washing oxidation tower through a pipeline, and a pipeline for adding sodium hydroxide solution and a pipeline for adding sodium bisulfite solution are further connected on the pipeline between the outlet of the caustic washing oxidation tower circulating pump and the inlet of the upper part of the caustic washing oxidation tower; the outlet of the caustic washing oxidation tower circulating pump is connected with a wastewater storage tank.

[0025] Further, the inlet of the quenching tower circulating pump is connected with the outlet of the lower part of the quenching tower, the outlet of the quenching tower circulating pump is connected with the inlet of the upper part of the quenching tower through a pipeline, and a pipeline for adding emergency cooling water is further connected on the pipeline between the outlet of the quenching tower circulating pump and the inlet of the upper part of the quenching tower.

[0026] Further, the inlet of the TO furnace is connected with the outlet of the preheater, and the outlet of the TO furnace is connected with the inlet of the preheater and the inlet of the heat exchanger through pipelines respectively.

[0027] Further, the inlet of the quenching tower is connected with the outlet of the preheater and the outlet of the heat exchanger through pipelines respectively.

[0028] Compared with the prior art, the utility model has the advantages of:

[0029] (1) the volatile organic waste gas treatment system with chlorine provided by the utility model has low concentration of unorganized waste gas with chlorine, improves the concentration of waste gas through zeolite runner concentration, and enters the TO furnace for combustion at the same time with organized waste gas with chlorine, so that fuel consumption is reduced.

[0030] (2) the volatile organic waste gas treatment system with chlorine provided by the utility model recovers hydrogen chloride generated in combustion through a water washing tower, produces by-product hydrochloric acid, and realizes resource recycling.

[0031] (3) the volatile organic waste gas treatment system with chlorine provided by the utility model divides high-temperature flue gas at the outlet of the TO furnace into two streams, one of which is connected with a preheater and is used for preheating waste gas, and the other of which is connected with a heat exchanger and is used for heating desorption waste gas, so that waste heat of flue gas is fully utilized.

[0032] (4) the volatile organic waste gas treatment system with chlorine provided by the utility model further connects the quenching tower with the water washing tower through a pipeline, the quenching tower needs to supplement emergency cooling water, and the water washing tower needs to discharge water containing hydrochloric acid, so that the solution of the quenching tower flows to the water washing tower by gravity, and then is transported to a hydrochloric acid storage tank by a water washing tower circulating pump.

[0033] (5) The chlorine-containing volatile organic waste gas treatment system provided by the utility model further has a pipeline for adding sodium hydroxide solution and a pipeline for adding sodium bisulfite solution connected on the pipeline between the outlet of the caustic washing oxidation tower circulating pump and the inlet of the upper part of the caustic washing oxidation tower, sodium bisulfite solution is added in the caustic washing oxidation tower to decompose sodium hypochlorite, and the safety problem of sodium hypochlorite in waste water is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a structural schematic view of the chlorine-containing volatile organic waste gas treatment system of the utility model.

[0035] Indicated by the reference numerals in the drawing:

[0036] 1-zeolite runner; 2-adsorption fan; 3-exhaust cylinder; 4-heat exchanger; 5-desorption fan; 6-preheater; 7-TO furnace; 8-quench tower; 9-quench tower circulating pump; 10-water washing tower; 11-water washing tower circulating pump; 12-hydrochloric acid storage tank; 13-caustic washing oxidation tower; 14-caustic washing oxidation tower circulating pump; 15-waste water storage tank; 16-system fan;

[0037] 1-1, zeolite runner adsorption area; 1-2, zeolite runner cooling area; 1-3, zeolite runner desorption area;

[0038] a-unorganized chlorine-containing waste gas; b-organized chlorine-containing waste gas; c-emergency cooling water; d-sodium bisulfite solution; e-sodium hydroxide solution, f-industrial water. DETAILED DESCRIPTION

[0039] The utility model will be described in detail below in combination with the drawings and specific embodiments. In the technical scheme, the components, material names, connection structures, control methods and other features not explicitly described are regarded as common technical features disclosed in the prior art.

[0040] It should be noted that the "front", "back", "left", "right", "up", "down", "in", "out" and other directions or position relationships described in the present application are based on the directions or position relationships indicated by the drawings, and are used to make the description of the present application more concise and clear, and do not mean that the connecting parts or components must have a certain orientation restriction, therefore, it cannot be used as a limitation on the present application. In addition, the embodiments described in the present application are only a part of the embodiments of the utility model, and cannot represent all embodiments, and other embodiments obtained by those skilled in the art without making creative efforts on the present application should belong to the protection scope of the utility model.

[0041] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0042] It should be noted that, in the utility model, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations.And, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent in such process, method, article or equipment.Under no more limitation, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article or equipment including the element.

[0043] In the following examples, unorganized chlorine-containing waste gas refers to organic waste gas collected by gas hood and the like, and organized chlorine-containing waste gas refers to waste gas collected and discharged by directly connecting the waste gas pipeline with the equipment interface.The concentration of unorganized chlorine-containing waste gas is relatively low compared with that of organized chlorine-containing waste gas.

[0044] In the following examples, the zeolite wheel 1 uses an existing zeolite wheel, such as the zeolite wheel disclosed in CN212594845U, wherein the zeolite wheel adsorption zone 1-1 is the purification zone in CN212594845U.

[0045] Embodiment

[0046] As Figure 1 shown, the embodiment provides a chlorine-containing volatile organic waste gas treatment system, which comprises a zeolite wheel 1, an exhaust cylinder 3, a heat exchanger 4, a preheater 6, a TO furnace 7, a quenching tower 8, a water washing tower 10, an alkali washing oxidation tower 13, further comprising a hydrochloric acid storage tank 12, a wastewater storage tank 15, a water washing tower circulating pump 11, an alkali washing oxidation tower circulating pump 14, a quenching tower circulating pump 9, further comprising a system fan 16, a desorption fan 5 and an adsorption fan 2.

[0047] The zeolite wheel 1 is used for adsorbing the unorganized chlorine-containing waste gas to obtain the adsorbed purified gas and the flue gas treated by the alkali washing oxidation tower 13; the exhaust cylinder 3 is connected with the zeolite wheel 1, the exhaust cylinder 3 is used for discharging the adsorbed purified gas; the heat exchanger 4 is connected with the zeolite wheel 1, the heat exchanger 4 is used for heating the unorganized chlorine-containing waste gas by using the high-temperature flue gas at the outlet of the TO furnace 7 to enter the zeolite wheel 1 to obtain the desorbed unorganized chlorine-containing waste gas; the preheater 6 is connected with the zeolite wheel 1, the preheater 6 is used for preheating the mixed waste gas obtained by mixing the desorbed unorganized chlorine-containing waste gas and the organized chlorine-containing waste gas; the TO furnace 7 is connected with the preheater 6 and the heat exchanger 4 respectively, the TO furnace 7 is used for thermally combusting and decomposing the preheated mixed waste gas to obtain flue gas, one of the flue gas enters the preheater 6 to preheat the mixed waste gas at the inlet of the TO furnace 7, and the other of the flue gas enters the heat exchanger 4 to heat the desorbed unorganized chlorine-containing waste gas; the quenching tower 8 is connected with the preheater 6 and the heat exchanger 4 respectively, the quenching tower 8 is used for reducing the temperature of the flue gas; the water washing tower 10 is connected with the quenching tower 8, the water washing tower 10 is used for absorbing hydrogen chloride in the flue gas after being cooled; the alkali washing oxidation tower 13 is connected with the water washing tower 10 and the exhaust cylinder 3 respectively, the alkali washing oxidation tower 13 is used for further treating the flue gas treated by the water washing tower 10, and the treated flue gas enters the exhaust cylinder 3.

[0048] The hydrochloric acid storage tank 12 is connected with the water washing tower 10, and the hydrochloric acid storage tank 12 is used for storing the hydrochloric acid discharged from the water washing tower 10.

[0049] The waste water storage tank 15 is connected with the alkali washing oxidation tower 13, and the waste water storage tank 15 is used for storing the waste water discharged from the alkali washing oxidation tower 13.

[0050] The system fan 16 is arranged between the alkali washing oxidation tower 13 and the exhaust cylinder 3, and the system fan 16 is used for sending the flue gas treated by the alkali washing oxidation tower 13 into the exhaust cylinder 3.

[0051] The zeolite wheel 1 comprises a zeolite wheel adsorption area 1-1, a zeolite wheel cooling area 1-2 and a zeolite wheel desorption area 1-3; the zeolite wheel adsorption area 1-1 is connected with the exhaust cylinder 3, and the zeolite wheel adsorption area 1-1 is used for adsorbing the unorganized chlorine-containing waste gas to obtain the adsorbed purified gas; the zeolite wheel cooling area 1-2 is connected with the inlet of the heat exchanger 4, and the zeolite wheel cooling area 1-2 is used for passing the unorganized chlorine-containing waste gas into the heat exchanger 4 to heat; the zeolite wheel desorption area 1-3 is connected with the outlet of the heat exchanger 4 and the preheater 6 respectively, and the zeolite wheel desorption area 1-3 is used for desorbing the heated unorganized chlorine-containing waste gas.

[0052] The desorption fan 5 is arranged between the zeolite wheel 1 and the preheater 6, and the desorption fan 5 is used for conveying the desorbed unorganized chlorine-containing waste gas.

[0053] The adsorption fan 2 is arranged between the zeolite wheel 1 and the exhaust cylinder 3, and is used to transport the purified gas after adsorption.

[0054] One side of the zeolite wheel adsorption area 1-1 is connected with a pipeline for inputting the unorganized chlorine-containing waste gas, and the other side is connected with the inlet of the exhaust cylinder 3 through a pipeline provided with the adsorption fan 2.

[0055] One side of the zeolite wheel cooling area 1-2 is connected with a pipeline for inputting the unorganized chlorine-containing waste gas, and the other side is connected with the inlet of the heat exchanger 4 through a pipeline.

[0056] One side of the zeolite wheel desorption area 1-3 is connected with the outlet of the heat exchanger 4 through a pipeline, and the other side is connected with the inlet of the preheater 6 through a pipeline provided with the desorption fan 5.

[0057] The pipeline for inputting the organized chlorine-containing waste gas is connected with the inlet of the preheater 6.

[0058] The water washing tower circulating pump 11 is connected with the water washing tower 10, and is connected with the hydrochloric acid storage tank 12. The inlet of the water washing tower circulating pump 11 is connected with the outlet of the lower part of the water washing tower 10 through a pipeline, the outlet of the water washing tower circulating pump 11 is connected with the inlet of the upper part of the water washing tower 10 through a pipeline to transport the circulating liquid for spraying, and the outlet of the water washing tower circulating pump 11 is connected with the hydrochloric acid storage tank 12.

[0059] The alkali washing oxidation tower circulating pump 14 is connected with the alkali washing oxidation tower 13, and is connected with the wastewater storage tank 15. The inlet of the alkali washing oxidation tower circulating pump 14 is connected with the outlet of the lower part of the alkali washing oxidation tower 13 through a pipeline, the outlet of the alkali washing oxidation tower circulating pump 14 is connected with the inlet of the upper part of the alkali washing oxidation tower 13 through a pipeline, and a pipeline for adding sodium hydroxide solution and a pipeline for adding sodium bisulfite solution are further connected on the pipeline between the outlet of the alkali washing oxidation tower circulating pump 14 and the inlet of the upper part of the alkali washing oxidation tower 13, and the outlet of the alkali washing oxidation tower circulating pump 14 is connected with the wastewater storage tank 15.

[0060] The quenching tower circulating pump 9 is connected with the quenching tower 8. The inlet of the quenching tower circulating pump 9 is connected with the outlet of the lower part of the quenching tower 8 through a pipeline, the outlet of the quenching tower circulating pump 9 is connected with the inlet of the upper part of the quenching tower 8 through a pipeline, and a pipeline for adding emergency cooling water is further connected on the pipeline between the outlet of the quenching tower circulating pump 9 and the inlet of the upper part of the quenching tower 8.

[0061] The inlet of the TO furnace 7 is connected with the outlet of the preheater 6 through a pipeline, and the outlet of the TO furnace 7 is respectively connected with the inlet of the preheater 6 and the inlet of the heat exchanger 4 through pipelines.

[0062] The inlet of the quench tower 8 is connected by a pipeline with the outlet of the preheater 6 and the outlet of the heat exchanger 4 respectively.

[0063] The outlet of the lower part of the water washing tower 10 is connected by a pipeline with the inlet of the quench tower 8, and the quench tower 8 needs to supplement emergency cooling water, and the water washing tower 10 needs to discharge water containing hydrochloric acid, so that the solution of the quench tower 8 flows by gravity to the water washing tower 10, and then is transported to the hydrochloric acid storage tank 12 by the water washing tower circulating pump 11.

[0064] The embodiment provides a working method of a volatile organic waste gas treatment system containing chlorine, and comprises the following steps:

[0065] The unorganized chlorine-containing waste gas enters the zeolite wheel adsorption area 1-1 of the zeolite wheel 1 for adsorption, and the purified gas after adsorption is transported by the adsorption fan 2 and discharged into the exhaust cylinder 3.

[0066] The unorganized chlorine-containing waste gas is divided into a waste gas, which enters the zeolite wheel cooling area 1-2 to cool the zeolite wheel 1, and then the waste gas enters the heat exchanger 4 for heating to about 200 DEG C, enters the zeolite wheel desorption area 1-3, and the desorbed waste gas (desorbed unorganized chlorine-containing waste gas) is transported by the desorption fan 5 and mixed with the organized chlorine-containing waste gas.

[0067] The mixed waste gas enters the preheater 6 for preheating, and then enters the TO furnace 7 for thermal combustion and decomposition, the combustion temperature of the TO furnace 7 is about 900 DEG C, water, carbon dioxide, hydrogen chloride and a small amount of chlorine gas and the like are generated, the high-temperature flue gas at the outlet of the TO furnace 7 is divided into two flue gases, one flue gas enters the preheater 6 to preheat the waste gas (mixed waste gas) at the inlet of the TO furnace 7, and the other flue gas enters the heat exchanger 4 to heat the desorption gas (desorbed unorganized chlorine-containing waste gas), then the two flue gases are mixed, the flue gas temperature needs to be controlled above 500 DEG C, and then enters the quench tower 8, and the flue gas temperature is rapidly reduced to below 90 DEG C by spraying through the quench tower circulating pump 9 and emergency cooling water, the hydrochloric acid solution at the bottom of the quench tower 8 flows by itself to the water washing tower 10 through the pipeline between the quench tower 8 and the water washing tower 10, and the flue gas after cooling enters the water washing tower 10, and the circulating liquid is transported by the water washing tower circulating pump 11 to spray, further absorbing hydrogen chloride in the flue gas, when the concentration of hydrochloric acid reaches a certain value, the hydrochloric acid solution is transported by the water washing tower circulating pump 11 to the hydrochloric acid storage tank 12.

[0068] The flue gas enters the alkali washing oxidation tower 13, industrial water is added into the alkali washing oxidation tower 13 through a pipeline for passing industrial water, sodium hydroxide solution and sodium bisulfite solution are added into the alkali washing oxidation tower 13 through spraying, sodium hydroxide reacts with hydrogen chloride to generate sodium chloride and water, chlorine reacts with sodium hydroxide to generate sodium hypochlorite, sodium chloride and water, sodium bisulfite reacts with sodium hypochlorite and sodium hydroxide to generate sodium chloride, sodium sulfate and water, and the sodium hypochlorite existing in the waste water can be reduced. The waste water is transported to the waste water storage tank 15 by the alkali washing oxidation tower circulating pump 14. The flue gas treated by the alkali washing oxidation tower 13 is transported into the exhaust cylinder 3 by the system fan 16 for emission.

[0069] Figure 1 In the figure, a is unorganized chlorine-containing waste gas, which is transported into the zeolite runner 1 through a pipeline; b is organized chlorine-containing waste gas, which is transported into the preheater 6 through a pipeline; c is emergency cooling water, which is sprayed into the quenching tower 8 through a pipeline; d is sodium bisulfite solution, e is sodium hydroxide solution, which are respectively sprayed into the alkali washing oxidation tower 13 through pipelines, and f is industrial water, which is transported into the alkali washing oxidation tower 13 through a pipeline.

[0070] The above description of the embodiments is for facilitating the ordinary skilled person in the art to understand and use the utility model. The person skilled in the art can obviously easily make various modifications to the embodiments, and apply the general principles described herein to other embodiments without having to go through creative labor. Therefore, the utility model is not limited to the above embodiments, and the improvements and modifications made by the person skilled in the art according to the disclosure of the utility model without departing from the scope of the utility model should be within the protection scope of the utility model.

Claims

1. A volatile organic waste gas treatment system containing chlorine, characterized by, The volatile organic waste gas treatment system with chlorine comprises a zeolite wheel (1), an exhaust cylinder (3), a heat exchanger (4), a preheater (6), a TO furnace (7), a quenching tower (8), a water washing tower (10), and an alkali washing oxidation tower (13); The zeolite wheel (1) is used for adsorbing the unorganized volatile organic waste gas with chlorine to obtain the purified gas after adsorption and the flue gas after treatment by the alkali washing oxidation tower (13); The exhaust cylinder (3) is connected with the zeolite wheel (1); The heat exchanger (4) is connected with the zeolite wheel (1); The preheater (6) is connected with the zeolite wheel (1); The TO furnace (7) is connected with the preheater (6) and the heat exchanger (4) respectively; The quenching tower (8) is connected with the preheater (6) and the heat exchanger (4) respectively; The water washing tower (10) is connected with the quenching tower (8); The alkali washing oxidation tower (13) is connected with the water washing tower (10) and the exhaust cylinder (3) respectively.

2. The chlorine-containing volatile organic exhaust gas treatment system according to claim 1, characterized by, The volatile organic waste gas treatment system with chlorine further comprises a hydrochloric acid storage tank (12); The hydrochloric acid storage tank (12) is connected with the water washing tower (10), and is used for storing the hydrochloric acid discharged from the water washing tower (10).

3. The chlorine-containing volatile organic exhaust gas treatment system according to claim 2, characterized by, The volatile organic waste gas treatment system with chlorine further comprises a water washing tower circulating pump (11); The water washing tower circulating pump (11) is connected with the water washing tower (10); The water washing tower circulating pump (11) is connected with the hydrochloric acid storage tank (12).

4. The chlorine-containing volatile organic exhaust gas treatment system according to claim 1, characterized by The volatile organic waste gas treatment system with chlorine further comprises a wastewater storage tank (15); The wastewater storage tank (15) is connected with the alkali washing oxidation tower (13), and is used for storing the wastewater discharged from the alkali washing oxidation tower (13).

5. The chlorine-containing volatile organic exhaust gas treatment system according to claim 4, characterized by The volatile organic waste gas treatment system with chlorine further comprises an alkali washing oxidation tower circulating pump (14); The alkali washing oxidation tower circulating pump (14) is connected with the alkali washing oxidation tower (13); The alkali washing oxidation tower circulating pump (14) is connected with the wastewater storage tank (15).

6. The chlorine-containing volatile organic exhaust gas treatment system according to claim 1, characterized by The volatile organic waste gas treatment system with chlorine further comprises a quenching tower circulating pump (9); The quenching tower circulating pump (9) is connected with the quenching tower (8).

7. The chlorine-containing volatile organic exhaust gas treatment system according to claim 1, characterized by The zeolite wheel (1) comprises a zeolite wheel adsorption zone (1-1), a zeolite wheel cooling zone (1-2), and a zeolite wheel desorption zone (1-3); The zeolite wheel adsorption zone (1-1) is connected with the exhaust cylinder (3), and is used for adsorbing the unorganized volatile organic waste gas with chlorine to obtain the purified gas after adsorption; The zeolite wheel cooling zone (1-2) is connected with the inlet of the heat exchanger (4), and is used for passing the unorganized volatile organic waste gas with chlorine into the heat exchanger (4) to be heated; The zeolite wheel desorption zone (1-3) is connected with the outlet of the heat exchanger (4) and the preheater (6) respectively, and is used for desorbing the heated unorganized volatile organic waste gas with chlorine.

8. The chlorine-containing volatile organic exhaust gas treatment system according to claim 1, characterized by A desorption fan (5) is arranged between the zeolite wheel (1) and the preheater (6), and is used for conveying the desorbed unorganized volatile organic waste gas with chlorine.

9. The chlorine-containing volatile organic exhaust gas treatment system according to claim 1, characterized by The zeolite runner (1) and the exhaust cylinder (3) are provided with an adsorption fan (2), which is used for conveying the purified gas after adsorption.

10. The chlorine-containing volatile organic exhaust gas treatment system according to claim 1, characterized by, The alkali washing oxidation tower (13) and the exhaust cylinder (3) are provided with a system fan (16), which is used for conveying the flue gas after treatment.

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