Industrial waste gas separation and treatment system and method for atmospheric environmental protection

Abstract

The invention relates to the technical field of industrial atmospheric waste separation, and discloses an industrial waste gas separation and treatment system and method for atmospheric environmental protection, comprising: raw gas is successively passed through two activated carbon filters to obtain clean gas, and the two activated carbon filters successively passed through by the raw gas are respectively recorded as a first-stage filter and a second-stage filter; a first purification strategy is executed to purify the raw gas; whether the activated carbon in the first filter reaches the replacement standard; if the replacement standard is reached, a second purification strategy is executed to purify the raw gas; whether the activated carbon in the second filter reaches the replacement standard; if the replacement standard is reached, a third purification strategy is executed to purify the raw gas; whether the activated carbon in the third filter reaches the replacement standard; if the replacement standard is reached, a fourth purification strategy is executed to purify the raw gas; wherein, an exhaust purification strategy is executed to use clean gas to discharge the residual raw gas, thereby improving the utilization rate of activated carbon.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial waste gas separation, and in particular to an industrial waste gas separation and treatment system and method for atmospheric environmental protection. Background Art

[0002] The application of activated carbon in industrial waste gas treatment has significant benefits, mainly reflected in its excellent adsorption performance, economy and environmental friendliness. First of all, activated carbon has extremely high specific surface area and porosity, and can effectively adsorb a variety of harmful gases and volatile organic compounds. Its porous structure enables it to capture pollutants in the gas in a short time and reduce the concentration of harmful components in the air, thereby meeting the requirements of environmental protection regulations. The economy of activated carbon also makes it the preferred method for enterprises to treat waste gas. Compared with other waste gas treatment technologies, the initial investment and operating costs of activated carbon equipment are relatively low, and its regeneration process is relatively simple and can be reused, thereby effectively reducing long-term operating costs. Activated carbon is an environmentally friendly material that can remove pollutants through a physical adsorption mechanism without generating secondary pollution. This characteristic gives it advantages in environmental protection and sustainable development, and meets the requirements of modern industry for green production. Therefore, as an efficient, economical and environmentally friendly waste gas treatment material, activated carbon is being favored by more and more industries.

[0003] In the prior art, during the adsorption process of activated carbon, the waste gas passes through the front layer and the rear layer of activated carbon in sequence. However, the front layer of activated carbon contacts the waste gas first, so its saturation rate is usually faster. After the activated carbon in the front layer reaches saturation, the waste gas will continue to flow to the rear layer, resulting in a decrease in the adsorption efficiency of the rear layer, and the rear layer fails to fully exert its adsorption capacity. At this time, if the front and rear layers are replaced at the same time, the utilization rate of the activated carbon will be low.

[0004] This scheme proposes to divide the activated carbon used to treat exhaust gas into two parts, which are respectively loaded into two activated carbon filters, serving as the first-stage filter and the second-stage filter respectively. When the activated carbon in the first-stage filter needs to be replaced, an activated carbon filter is added to continue to purify the exhaust gas. Summary of the invention

[0005] The present invention provides an industrial waste gas separation and treatment system and method for atmospheric environmental protection, which are used to promote the solution of the problems mentioned in the above background technology.

[0006] The present invention provides the following technical strategies: a method for separating and treating industrial waste gas for atmospheric environmental protection, comprising: recording the waste gas to be purified discharged from industrial production as raw gas;

[0007] The gas that reaches the emission standard after the raw gas is cleaned by activated carbon is recorded as clean gas;

[0008] The raw gas passes through two activated carbon filters successively to obtain clean gas, and the two activated carbon filters passed by the raw gas successively are respectively recorded as the first-stage filter and the second-stage filter;

[0009] Get a first filter and a second filter as a first-level filter and a second-level filter respectively;

[0010] Execute the first purification strategy to purify the raw gas;

[0011] Check whether the activated carbon in the first filter meets the replacement standard;

[0012] If the replacement criteria are met, obtain a third filter;

[0013] The second filter and the third filter are used as the first-stage filter and the second-stage filter respectively;

[0014] Replace the activated carbon in the first filter;

[0015] Execute the second purification strategy to purify the raw gas;

[0016] Check whether the activated carbon in the second filter meets the replacement standard;

[0017] If the replacement standard is reached, replace the activated carbon in the second filter;

[0018] The third filter and the first filter are used as the first-stage filter and the second-stage filter respectively;

[0019] Execute the third purification strategy to purify the raw gas;

[0020] Check whether the activated carbon in the third filter meets the replacement standard;

[0021] If the replacement standard is reached, replace the activated carbon in the third filter;

[0022] The first filter and the second filter are used as a first-stage filter and a second-stage filter, respectively;

[0023] Execute the fourth purification strategy to purify the raw gas;

[0024] Among them, an exhaust purification strategy is implemented to use clean gas to discharge the remaining original gas.

[0025] Optionally, executing the first purification strategy includes:

[0026] Close the first bypass valve A and the first bypass valve B;

[0027] Close the ninth and twelfth valves;

[0028] Close the second bypass valve A, the fifth valve and the tenth valve;

[0029] Open the first valve, the second valve and the third valve;

[0030] The original air is passed into the first air inlet pipe A, purified by the first filter, flows from the first connecting pipe into the second filter for purification, and finally discharged from the second air outlet pipe A.

[0031] Optionally, executing the second purification strategy includes:

[0032] Close the first valve and the second valve;

[0033] Open the first bypass valve A and the first bypass valve B;

[0034] Close the second bypass valve A and the second bypass valve B;

[0035] Close the third valve and the tenth valve;

[0036] Open the fourth valve and the fifth valve;

[0037] Close the third bypass valve A and the eighth valve;

[0038] Open the sixth valve and the seventh valve;

[0039] The raw gas is passed into the first intake pipe A, flows out from the first bypass pipe, passes through the first connecting pipe and reaches the second filter for purification;

[0040] The gas flows out from the second connecting pipe, passes through the third filter, and is discharged from the third outlet pipe A.

[0041] Optionally, executing the third purification strategy includes:

[0042] Close the first valve and the second valve;

[0043] Open the first bypass valve A and the first bypass valve B;

[0044] Close the fourth valve and the fifth valve;

[0045] Open the second bypass valve A and the second bypass valve B;

[0046] Close the sixth valve, the seventh valve, the eighth valve and the tenth valve;

[0047] Close the third bypass valve A and the third bypass valve B;

[0048] Close valve No. 12;

[0049] Open the ninth valve;

[0050] The raw gas is introduced into the first intake pipe A, flows out from the first bypass pipe, passes through the first connecting pipe, enters the second bypass pipe, enters the second connecting pipe, and then flows to the third filter;

[0051] After flowing out from the third filter, it passes through the third connecting pipe, enters the first filter, and is discharged from the first outlet pipe B.

[0052] Optionally, executing the fourth purification strategy includes:

[0053] Open valve 11;

[0054] Close the ninth and second valves;

[0055] Open valves 12 and 13;

[0056] Close the third valve;

[0057] Open the tenth valve;

[0058] Close the seventh and eighth valves;

[0059] Close the fourth valve and the fifth valve;

[0060] Open the first bypass valve A, the first bypass valve B, the second bypass valve A, the second bypass valve B, the third bypass valve A and the third bypass valve B;

[0061] The original air is passed into the first air inlet pipe C and purified by the first filter, then flows into the second filter from the fourth connecting pipe and purified, and then flows into the marking pipe;

[0062] The exhaust gas purification strategy includes:

[0063] The composition of the gas in the first air inlet end A and the first air inlet end B is constantly detected. When the gas composition reaches the emission standard, the tenth valve is closed and the third valve is opened.

[0064] A system for separating and treating industrial waste gas for atmospheric environmental protection, comprising:

[0065] 3 activated carbon filters, respectively denoted as the first filter, the second filter and the third filter;

[0066] Wherein, each activated carbon filter comprises an air inlet and an air outlet, and each air inlet is used to set a plurality of air inlet ends, and each air outlet is used to set a plurality of air outlet ends;

[0067] A first air inlet port A is provided at the air inlet of the first filter;

[0068] An air intake pipe is arranged at a first air intake end A of the first filter, which is referred to as a first air intake pipe A;

[0069] A first air outlet port A is provided at the air outlet of the first filter;

[0070] A second air inlet port A is provided at the air inlet of the second filter;

[0071] A pipeline is provided between the first gas outlet end A and the second gas inlet end A, which is denoted as a first connecting pipe;

[0072] A second air outlet port A is provided at the air outlet of the second filter;

[0073] An air outlet pipe is arranged at the second air outlet end A of the second filter, which is recorded as the second air outlet pipe A;

[0074] A second air outlet port B is provided at the air outlet of the second filter;

[0075] A third air inlet port A is provided at the air inlet of the third filter;

[0076] A pipeline is provided between the second gas outlet end B and the third gas inlet end A, which is recorded as a second connecting pipe;

[0077] A third air outlet port A is provided at the air outlet of the third filter;

[0078] An air outlet pipe is provided at the third air outlet end A of the third filter, which is referred to as the third air outlet pipe A.

[0079] Optional, for the first filter:

[0080] A connection node A is provided on the first air intake pipe A;

[0081] A connection node B is provided on the first connecting pipe;

[0082] A first bypass pipe is provided, wherein two ends of the first bypass pipe are respectively connected to a connection node A and a connection node B;

[0083] A pipeline valve is provided between the connection node A and the first air inlet end A, which is denoted as the first valve;

[0084] A pipeline valve is provided between the connection node B and the first gas outlet A, which is denoted as the second valve;

[0085] A valve is provided at one end of the first bypass pipe where the connection node A is located, which is denoted as the first bypass valve A;

[0086] A valve is provided at one end of the first bypass pipe where the connection node B is located, which is denoted as the first bypass valve B;

[0087] A pipeline valve is arranged on the second air outlet pipe A, which is marked as the third valve.

[0088] Optionally, a third air outlet port B is provided at the air outlet of the third filter;

[0089] A first air inlet port B is provided at the air inlet of the first filter;

[0090] A pipeline is provided between the third gas outlet end B and the first gas inlet end C, which is recorded as a third connecting pipe;

[0091] A first air outlet port B is provided at the air outlet of the first filter;

[0092] An air outlet pipe is arranged at the first air outlet end B of the first filter, which is referred to as the first air outlet pipe B;

[0093] For the second filter:

[0094] A connection node C is provided on the first connecting pipe;

[0095] A connection node D is provided on the second connecting pipe;

[0096] A second bypass pipeline is provided, wherein two ends of the second bypass pipeline are respectively connected to the connection node C and the connection node D;

[0097] A pipeline valve is provided between the connection node C and the second air inlet end A, which is recorded as the fourth valve;

[0098] A pipeline valve is provided between the connection node D and the second gas outlet B, which is recorded as the fifth valve;

[0099] A valve is provided at one end of the second bypass pipe where the connection node C is located, which is denoted as the second bypass valve A;

[0100] A valve is provided at one end of the second bypass pipe where the connection node D is located, which is denoted as the second bypass valve B;

[0101] A pipeline valve is arranged on the third air outlet pipe A, which is marked as the sixth valve.

[0102] Optional, for the third filter:

[0103] A connection node E is provided on the second connecting pipe;

[0104] A connection node F is provided on the third connecting pipe;

[0105] A third bypass pipe is provided, and two ends of the third bypass pipe are respectively connected to the connection node E and the connection node F;

[0106] A pipeline valve is provided between the connection node E and the third air inlet terminal A, which is recorded as the seventh valve;

[0107] A pipeline valve is provided between the connection node F and the third gas outlet end B, which is recorded as the eighth valve;

[0108] A valve is provided at one end of the third bypass pipe where the connection node E is located, which is denoted as the third bypass valve A;

[0109] A valve is provided at one end of the third bypass pipe where the connection node F is located, which is denoted as the third bypass valve B;

[0110] A pipeline valve is provided on the first air outlet pipe B, which is denoted as the ninth valve;

[0111] A first air inlet port B is provided at the air inlet of the first filter;

[0112] An air intake pipe is arranged at the first air intake end B of the first filter, which is referred to as the first air intake pipe C;

[0113] A valve is provided on the first air intake pipe C, which is denoted as the eleventh valve;

[0114] A first air outlet port C is provided at the air outlet of the first filter;

[0115] A second air inlet port B is provided at the air inlet of the second filter;

[0116] A pipe is provided between the first gas outlet end C and the second gas inlet end B, which is recorded as a fourth connecting pipe;

[0117] A valve is provided at one end of the fourth connecting pipe where the first gas outlet end C is located, which is denoted as the twelfth valve;

[0118] A valve is provided at one end of the fourth connecting pipe where the second air inlet end B is located, which is denoted as the thirteenth valve;

[0119] A valve is provided on the first air inlet pipe A, which is denoted as the fourteenth valve;

[0120] A connection node G is provided between the third valve and the second outlet end A of the second outlet pipe A of the second filter;

[0121] A connection node H is provided on the second connecting pipe;

[0122] A pipeline is set between the connection node G and the connection node H, and the pipeline is marked as a marking pipe;

[0123] A pipeline valve is set on the marked pipe and is marked as the tenth valve.

[0124] The present invention has the following beneficial effects:

[0125] 1. The industrial waste gas separation and treatment method for atmospheric environmental protection, by setting a first-stage filter and a second-stage filter, while ensuring that the waste gas can be completely purified, divides the activated carbon into two parts according to the different adsorption efficiencies, that is, the adsorption efficiency of each part of the activated carbon is assumed to be the same. In this way, in the process of replacing the activated carbon, the activated carbon in the filter that is replaced each time is saturated, thereby achieving the highest utilization efficiency of the activated carbon.

[0126] 2. In the method for separating and treating industrial waste gas for atmospheric environmental protection, when the first filter and the second filter are used as the first-stage filter and the second-stage filter, the raw gas flows into the first filter through the first air inlet pipe A for purification, then flows into the second filter through the first connecting pipe, and finally flows out from the second air outlet pipe A; since the two filters contact the waste gas in different orders, the activated carbon in the first filter must be saturated first. At this time, it is only necessary to detect whether the activated carbon in the first filter needs to be replaced, thereby improving the utilization rate of the activated carbon and reducing the number of operation steps.

[0127] 3. The method for separating and treating industrial waste gas for atmospheric environmental protection, during the process of replacing the first filter, a first bypass pipe is set for the first filter to prevent the original gas from passing through the first filter; in order to improve the efficiency of waste gas treatment, during the process of replacing the activated carbon in the first filter, a third filter is added to cooperate with the second filter to continue to purify the original gas. At this time, the second filter is used as the first-stage filter and the third filter is used as the second-stage filter. In this way, the activated carbon in the second filter must be saturated first. At this time, it is only necessary to detect whether the activated carbon in the second filter needs to be replaced, thereby improving the utilization rate of the activated carbon and reducing the number of operating steps.

[0128] 4. In the method for separating and treating industrial waste gas for atmospheric environmental protection, when the activated carbon in the second filter needs to be replaced, the activated carbon in the first filter has been replaced. At this time, in order to improve the efficiency of waste gas treatment and avoid stopping the waste gas treatment during the process of replacing the activated carbon, the third filter is used as the first-stage filter, and the first filter is used as the second-stage filter to continue to purify the waste gas. At the same time, a second bypass pipe is added to the second filter to avoid the waste gas passing through the second filter during the process of replacing the activated carbon. In this way, the activated carbon in the third filter must be saturated first. At this time, it is only necessary to detect whether the activated carbon in the third filter needs to be replaced, thereby improving the utilization rate of the activated carbon and reducing the number of operating steps.

[0129] 5. In the method for separating and treating industrial waste gas for atmospheric environmental protection, when the activated carbon in the third filter needs to be replaced, the activated carbon in the second filter has been replaced. At this time, in order to improve the efficiency of waste gas treatment and avoid stopping the treatment of waste gas during the process of replacing the activated carbon, the first filter is used as the first-stage filter, and the second filter is used as the second-stage filter to continue to purify the waste gas. At the same time, a third bypass pipe is added to the third filter to avoid the waste gas passing through the third filter during the process of replacing the activated carbon. In this way, the activated carbon in the first filter must be saturated first. At this time, it is only necessary to detect whether the activated carbon in the first filter needs to be replaced, thereby improving the utilization rate of the activated carbon and reducing the number of operating steps.

[0130] 6. In the method for separating and treating industrial waste gas for atmospheric environmental protection, when the first filter is used as the first-stage filter and the second filter is used as the second-stage filter again, if the first air intake pipe A continues to introduce raw gas, then waste gas will be retained in multiple pipes such as the first bypass pipe, the second bypass pipe and the third bypass pipe. Since the waste gas may contain corrosive components and adsorb on the inner surface of the pipe when the gas does not flow, it will damage the pipe. Therefore, a first air intake pipe C is added to serve as the raw gas inlet of the fourth air intake strategy. At this time, the raw gas is introduced into the first filter. After filtration, the gas flows from the fourth connecting pipe into the second filter for purification, flows out from the second outlet pipe A, and flows into the marking pipe. The clean gas in the marking pipe is divided into two paths starting from the second connecting pipe, one of which flows into the third bypass pipe and the third connecting pipe, and flows into the first filter at the first air inlet end B for purification; the other flows into the second bypass pipe, the first connecting pipe and the first bypass pipe, and flows into the first filter at the first air inlet end A for purification, so as to discharge the original gas remaining in the pipeline, until the gas composition in the first air inlet end A and the first air inlet end B is qualified, and then the clean gas is discharged to the outside to prevent the original gas from corroding the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0131] Figure 1 It is a schematic diagram of the structure of the present invention.

[0132] Figure 2 This is a schematic diagram of the first purification strategy of the present invention.

[0133] Figure 3 This is a schematic diagram of the second purification strategy of the present invention.

[0134] Figure 4 This is a schematic diagram of the third purification strategy of the present invention.

[0135] Figure 5 This is a schematic diagram of the fourth purification strategy of the present invention.

[0136] In the figure: 1, the first valve, 2, the second valve, 3, the third valve, 4, the fourth valve, 5, the fifth valve, 6, the sixth valve, 7, the seventh valve, 8, the eighth valve, 9, the ninth valve, 10, the tenth valve, 11, the eleventh valve, 12, the twelfth valve, 13, the thirteenth valve, 14, the first air inlet end A, 15, the first air inlet end B, 16, the first air inlet end C, 17, the first air outlet end A, 18, the first air outlet end B, 19, the first air outlet end C, 20, the second air inlet end A, 21, the second air inlet end B, 22, the second air outlet end B, 23, the second air outlet end A, 24, the third air inlet end A, 25, the third air outlet end B, 26, the third air outlet end A, 27, the first air inlet pipe C, 2 8. First intake pipe A, 29. First bypass pipe, 30. First outlet pipe B, 31. Third connecting pipe, 32. Fourth connecting pipe, 33. First connecting pipe, 34. Second bypass pipe, 35. Second outlet pipe A, 36. Second connecting pipe, 37. Third bypass pipe, 38. Third outlet pipe A, 39. Connecting node G, 40. Connecting node H, 41. Marking pipe, A-connecting node A, B-connecting node B, C-connecting node C, D-connecting node D, E-connecting node E, F-connecting node F, G-first bypass valve A, H-first bypass valve B, I-second bypass valve A, J-second bypass valve B, K-third bypass valve A, L-third bypass valve B, M-fourteenth valve. DETAILED DESCRIPTION

[0137] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical strategies in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0138] Embodiment 1, a method for separating and treating industrial waste gas for atmospheric environmental protection, comprising:

[0139] The waste gas discharged from industrial production that needs to be purified is recorded as raw gas;

[0140] The gas that reaches the emission standard after the raw gas is cleaned by activated carbon is recorded as clean gas;

[0141] The raw gas passes through two activated carbon filters successively to obtain clean gas, and the two activated carbon filters passed by the raw gas successively are respectively recorded as the first-stage filter and the second-stage filter;

[0142] By setting up the first-stage filter and the second-stage filter, while ensuring that the exhaust gas can be completely purified, the activated carbon is divided into two parts according to the different adsorption efficiency, that is, the adsorption efficiency of each part of the activated carbon is the same by default. In this way, in the process of replacing the activated carbon, the activated carbon in the filter that is replaced each time is saturated, achieving the highest utilization efficiency of the activated carbon.

[0143] Get a first filter and a second filter as a first-level filter and a second-level filter respectively;

[0144] Execute the first purification strategy to purify the raw gas;

[0145] Check whether the activated carbon in the first filter meets the replacement standard;

[0146] If the replacement criteria are met, obtain a third filter;

[0147] The second filter and the third filter are used as the first-stage filter and the second-stage filter respectively;

[0148] Replace the activated carbon in the first filter;

[0149] Execute the second purification strategy to purify the raw gas;

[0150] Check whether the activated carbon in the second filter meets the replacement standard;

[0151] If the replacement standard is reached, replace the activated carbon in the second filter;

[0152] The third filter and the first filter are used as the first-stage filter and the second-stage filter respectively;

[0153] Execute the third purification strategy to purify the raw gas;

[0154] Check whether the activated carbon in the third filter meets the replacement standard;

[0155] If the replacement standard is reached, replace the activated carbon in the third filter;

[0156] The first filter and the second filter are used as a first-stage filter and a second-stage filter, respectively;

[0157] Execute the fourth purification strategy to purify the raw gas;

[0158] Among them, an exhaust purification strategy is implemented to use clean gas to discharge the remaining original gas.

[0159] The executing of the first purification strategy comprises:

[0160] Close the first bypass valve A and the first bypass valve B;

[0161] Close the ninth and twelfth valves;

[0162] Close the second bypass valve A, the fifth valve and the tenth valve;

[0163] Open the first valve, the second valve and the third valve;

[0164] The original air is passed into the first air inlet pipe A, purified by the first filter, flows from the first connecting pipe into the second filter for purification, and finally discharged from the second air outlet pipe A.

[0165] In this embodiment, refer to Figure 2 , the first filter and the second filter serve as the first-stage filter and the second-stage filter respectively;

[0166] When the first filter and the second filter are used as the first-stage filter and the second-stage filter, the original gas flows into the first filter through the first intake pipe A for purification, then flows into the second filter through the first connecting pipe, and finally flows out from the second outlet pipe A; since the two filters contact the exhaust gas in different orders, the activated carbon in the first filter must be saturated first. At this time, it is only necessary to detect whether the activated carbon in the first filter needs to be replaced, thereby improving the utilization rate of the activated carbon and reducing the number of operating steps.

[0167] The executing the second purification strategy comprises:

[0168] Close the first valve and the second valve;

[0169] Open the first bypass valve A and the first bypass valve B;

[0170] Close the second bypass valve A and the second bypass valve B;

[0171] Close the third valve and the tenth valve;

[0172] Open the fourth valve and the fifth valve;

[0173] Close the third bypass valve A and the eighth valve;

[0174] Open the sixth valve and the seventh valve;

[0175] The raw gas is passed into the first intake pipe A, flows out from the first bypass pipe, passes through the first connecting pipe and reaches the second filter for purification;

[0176] The gas flows out from the second connecting pipe, passes through the third filter, and is discharged from the third outlet pipe A.

[0177] In this embodiment, refer to Figure 3 , the second filter and the third filter serve as the first-stage filter and the second-stage filter respectively;

[0178] During the process of replacing the first filter, a first bypass pipe is set for the first filter to prevent the raw gas from passing through the first filter; in order to improve the efficiency of exhaust gas treatment, during the process of replacing the activated carbon in the first filter, a third filter is added to cooperate with the second filter to continue to purify the raw gas. At this time, the second filter is used as the first-stage filter and the third filter is used as the second-stage filter. In this way, the activated carbon in the second filter must be saturated first. At this time, it is only necessary to detect whether the activated carbon in the second filter needs to be replaced, thereby improving the utilization rate of the activated carbon and reducing the number of operating steps.

[0179] The executing the third purification strategy comprises:

[0180] Close the first valve and the second valve;

[0181] Open the first bypass valve A and the first bypass valve B;

[0182] Close the fourth valve and the fifth valve;

[0183] Open the second bypass valve A and the second bypass valve B;

[0184] Close the sixth valve, the seventh valve, the eighth valve and the tenth valve;

[0185] Close the third bypass valve A and the third bypass valve B;

[0186] Close valve No. 12;

[0187] Open the ninth valve;

[0188] The raw gas is introduced into the first intake pipe A, flows out from the first bypass pipe, passes through the first connecting pipe, enters the second bypass pipe, enters the second connecting pipe, and then flows to the third filter;

[0189] After flowing out from the third filter, it passes through the third connecting pipe, enters the first filter, and is discharged from the first outlet pipe B.

[0190] In this embodiment, refer to Figure 4 , the third filter and the first filter serve as the first-stage filter and the second-stage filter respectively;

[0191] When the activated carbon in the second filter needs to be replaced, the activated carbon in the first filter has been replaced. At this time, in order to improve the efficiency of exhaust gas treatment and avoid stopping the exhaust gas treatment during the replacement of activated carbon, the third filter is used as the first-stage filter, and the first filter is used as the second-stage filter to continue to purify the exhaust gas. At the same time, a second bypass pipe is added to the second filter to avoid the exhaust gas passing through the second filter during the replacement of activated carbon. In this way, the activated carbon in the third filter must be saturated first. At this time, it is only necessary to detect whether the activated carbon in the third filter needs to be replaced, thereby improving the utilization rate of the activated carbon and reducing the number of operating steps.

[0192] The executing the fourth purification strategy comprises:

[0193] Open valve 11;

[0194] Close the ninth and second valves;

[0195] Open valves 12 and 13;

[0196] Close the third valve;

[0197] Open the tenth valve;

[0198] Close the seventh and eighth valves;

[0199] Close the fourth valve and the fifth valve;

[0200] Open the first bypass valve A, the first bypass valve B, the second bypass valve A, the second bypass valve B, the third bypass valve A and the third bypass valve B;

[0201] The original air is passed into the first air inlet pipe C and purified by the first filter, then flows into the second filter from the fourth connecting pipe and purified, and then flows into the marking pipe;

[0202] In this embodiment, refer to Figure 5 , the first filter and the second filter are used as the first-stage filter and the second-stage filter respectively; wherein the dotted arrow indicates the flow direction of the clean air;

[0203] When the activated carbon in the third filter needs to be replaced, the activated carbon in the second filter has been replaced. At this time, in order to improve the efficiency of exhaust gas treatment and avoid stopping the exhaust gas treatment during the replacement of activated carbon, the first filter is used as the first-stage filter, and the second filter is used as the second-stage filter to continue to purify the exhaust gas. At the same time, a third bypass pipe is added to the third filter to avoid the exhaust gas passing through the third filter during the replacement of activated carbon. In this way, the activated carbon in the first filter must be saturated first. At this time, it is only necessary to detect whether the activated carbon in the first filter needs to be replaced, thereby improving the utilization rate of the activated carbon and reducing the number of operating steps.

[0204] The exhaust gas purification strategy includes:

[0205] The composition of the gas in the first air inlet end A and the first air inlet end B is constantly detected. When the gas composition reaches the emission standard, the tenth valve is closed and the third valve is opened.

[0206] When the first filter is used as the first-stage filter and the second filter is used as the second-stage filter again, if the first intake pipe A continues to introduce raw gas, then waste gas will remain in multiple pipes such as the first bypass pipe, the second bypass pipe and the third bypass pipe. Since the waste gas may contain corrosive components and is adsorbed on the inner surface of the pipe when the gas is not flowing, it will cause damage to the pipe. Therefore, a first intake pipe C is added to serve as the raw gas inlet of the fourth intake strategy. At this time, after the raw gas is filtered by the first filter, it flows into the second filter from the fourth connecting pipe for purification, and flows out from the second outlet pipe A and flows into the marking pipe. The clean gas in the marking pipe is divided into two paths starting from the second connecting pipe, one of which flows into the third bypass pipe and the third connecting pipe, and flows into the first filter at the first intake end B for purification; the other flows into the second bypass pipe, the first connecting pipe and the first bypass pipe, and flows into the first filter at the first intake end A for purification, so as to discharge the raw gas remaining in the pipe until the gas components in the first intake end A and the first intake end B are qualified, and then the clean gas is discharged to the outside to prevent the raw gas from corroding the pipe.

[0207] Example 2, refer to Figure 1 , a system for separating and treating industrial waste gas for atmospheric environmental protection, comprising:

[0208] 3 activated carbon filters, respectively denoted as the first filter, the second filter and the third filter;

[0209] Wherein, each activated carbon filter comprises an air inlet and an air outlet, and each air inlet is used to set a plurality of air inlet ends, and each air outlet is used to set a plurality of air outlet ends;

[0210] A first air inlet port A is provided at the air inlet of the first filter;

[0211] An air intake pipe is arranged at a first air intake end A of the first filter, which is referred to as a first air intake pipe A;

[0212] A first air outlet port A is provided at the air outlet of the first filter;

[0213] A second air inlet port A is provided at the air inlet of the second filter;

[0214] A pipeline is provided between the first gas outlet end A and the second gas inlet end A, which is denoted as a first connecting pipe;

[0215] A second air outlet port A is provided at the air outlet of the second filter;

[0216] An air outlet pipe is arranged at the second air outlet end A of the second filter, which is recorded as the second air outlet pipe A;

[0217] A second air outlet port B is provided at the air outlet of the second filter;

[0218] A third air inlet port A is provided at the air inlet of the third filter;

[0219] A pipeline is provided between the second gas outlet end B and the third gas inlet end A, which is recorded as a second connecting pipe;

[0220] A third air outlet port A is provided at the air outlet of the third filter;

[0221] An air outlet pipe is provided at the third air outlet end A of the third filter, which is referred to as the third air outlet pipe A.

[0222] For the first filter:

[0223] A connection node A is provided on the first air intake pipe A;

[0224] A connection node B is provided on the first connecting pipe;

[0225] A first bypass pipe is provided, wherein two ends of the first bypass pipe are respectively connected to a connection node A and a connection node B;

[0226] A pipeline valve is provided between the connection node A and the first air inlet end A, which is denoted as the first valve;

[0227] A pipeline valve is provided between the connection node B and the first gas outlet A, which is denoted as the second valve;

[0228] A valve is provided at one end of the first bypass pipe where the connection node A is located, which is denoted as the first bypass valve A;

[0229] A valve is provided at one end of the first bypass pipe where the connection node B is located, which is denoted as the first bypass valve B;

[0230] A pipeline valve is arranged on the second air outlet pipe A, which is marked as the third valve.

[0231] A third air outlet B is provided at the air outlet of the third filter;

[0232] A first air inlet port B is provided at the air inlet of the first filter;

[0233] A pipeline is provided between the third gas outlet end B and the first gas inlet end C, which is recorded as a third connecting pipe;

[0234] A first air outlet port B is provided at the air outlet of the first filter;

[0235] An air outlet pipe is arranged at the first air outlet end B of the first filter, which is referred to as the first air outlet pipe B;

[0236] For the second filter:

[0237] A connection node C is provided on the first connecting pipe;

[0238] A connection node D is provided on the second connecting pipe;

[0239] A second bypass pipeline is provided, wherein two ends of the second bypass pipeline are respectively connected to the connection node C and the connection node D;

[0240] A pipeline valve is provided between the connection node C and the second air inlet end A, which is recorded as the fourth valve;

[0241] A pipeline valve is provided between the connection node D and the second gas outlet B, which is recorded as the fifth valve;

[0242] A valve is provided at one end of the second bypass pipe where the connection node C is located, which is denoted as the second bypass valve A;

[0243] A valve is provided at one end of the second bypass pipe where the connection node D is located, which is denoted as the second bypass valve B;

[0244] A pipeline valve is arranged on the third air outlet pipe A, which is marked as the sixth valve.

[0245] For the third filter:

[0246] A connection node E is provided on the second connecting pipe;

[0247] A connection node F is provided on the third connecting pipe;

[0248] A third bypass pipe is provided, and two ends of the third bypass pipe are respectively connected to the connection node E and the connection node F;

[0249] A pipeline valve is provided between the connection node E and the third air inlet terminal A, which is recorded as the seventh valve;

[0250] A pipeline valve is provided between the connection node F and the third gas outlet end B, which is recorded as the eighth valve;

[0251] A valve is provided at one end of the third bypass pipe where the connection node E is located, which is denoted as the third bypass valve A;

[0252] A valve is provided at one end of the third bypass pipe where the connection node F is located, which is denoted as the third bypass valve B;

[0253] A pipeline valve is provided on the first air outlet pipe B, which is denoted as the ninth valve;

[0254] A first air inlet port B is provided at the air inlet of the first filter;

[0255] An air intake pipe is arranged at the first air intake end B of the first filter, which is denoted as the first air intake pipe C;

[0256] A valve is provided on the first air intake pipe C, which is denoted as the eleventh valve;

[0257] A first air outlet port C is provided at the air outlet of the first filter;

[0258] A second air inlet port B is provided at the air inlet of the second filter;

[0259] A pipe is provided between the first gas outlet end C and the second gas inlet end B, which is recorded as a fourth connecting pipe;

[0260] A valve is provided at one end of the fourth connecting pipe where the first gas outlet end C is located, which is denoted as the twelfth valve;

[0261] A valve is provided at one end of the fourth connecting pipe where the second air inlet end B is located, which is denoted as the thirteenth valve;

[0262] A valve is provided on the first air inlet pipe A, which is denoted as the fourteenth valve;

[0263] A connection node G is provided between the third valve and the second outlet end A of the second outlet pipe A of the second filter;

[0264] A connection node H is provided on the second connecting pipe;

[0265] A pipeline is set between the connection node G and the connection node H, and the pipeline is marked as a marking pipe;

[0266] A pipeline valve is set on the marked pipe and is marked as the tenth valve.

[0267] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0268] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for separating and treating industrial waste gas for atmospheric environmental protection, characterized in that: include: The waste gas discharged from industrial production that needs to be purified is recorded as raw gas; The gas that reaches the emission standard after the raw gas is cleaned by activated carbon is recorded as clean gas; The raw gas passes through two activated carbon filters successively to obtain clean gas, and the two activated carbon filters passed by the raw gas successively are respectively recorded as the first-stage filter and the second-stage filter; Get a first filter and a second filter as a first-level filter and a second-level filter respectively; Execute the first purification strategy to purify the raw gas; Check whether the activated carbon in the first filter meets the replacement standard; If the replacement criteria are met, obtain a third filter; The second filter and the third filter are used as the first-stage filter and the second-stage filter respectively; Replace the activated carbon in the first filter; Execute the second purification strategy to purify the original gas; Check whether the activated carbon in the second filter meets the replacement standard; If the replacement standard is reached, replace the activated carbon in the second filter; The third filter and the first filter are used as the first-stage filter and the second-stage filter respectively; Execute the third purification strategy to purify the raw gas; Check whether the activated carbon in the third filter meets the replacement standard; If the replacement standard is reached, replace the activated carbon in the third filter; The first filter and the second filter are used as a first-stage filter and a second-stage filter, respectively; Execute the fourth purification strategy to purify the raw gas; Among them, an exhaust purification strategy is implemented to use clean air to discharge the remaining raw air; Wherein, each activated carbon filter comprises an air inlet and an air outlet, and each air inlet is used to set a plurality of air inlet ends, and each air outlet is used to set a plurality of air outlet ends; A first air inlet port A is provided at the air inlet of the first filter; An air intake pipe is arranged at a first air intake end A of the first filter, which is referred to as a first air intake pipe A; A first air outlet port A is provided at the air outlet of the first filter; A second air inlet port A is provided at the air inlet of the second filter; A pipeline is provided between the first gas outlet end A and the second gas inlet end A, which is denoted as a first connecting pipe; A second air outlet port A is provided at the air outlet of the second filter; An air outlet pipe is arranged at the second air outlet end A of the second filter, which is recorded as the second air outlet pipe A; A second air outlet port B is provided at the air outlet of the second filter; A third air inlet port A is provided at the air inlet of the third filter; A pipeline is provided between the second gas outlet end B and the third gas inlet end A, which is recorded as a second connecting pipe; A third air outlet port A is provided at the air outlet of the third filter; An air outlet pipe is provided at the third air outlet end A of the third filter, which is referred to as the third air outlet pipe A; For the first filter: A connection node A is provided on the first air intake pipe A; A connection node B is provided on the first connecting pipe; A first bypass pipe is provided, wherein two ends of the first bypass pipe are respectively connected to a connection node A and a connection node B; A pipeline valve is provided between the connection node A and the first air inlet end A, which is denoted as the first valve; A pipeline valve is provided between the connection node B and the first gas outlet A, which is denoted as the second valve; A valve is provided at one end of the first bypass pipe where the connection node A is located, which is denoted as the first bypass valve A; A valve is provided at one end of the first bypass pipe where the connection node B is located, which is denoted as the first bypass valve B; A pipeline valve is provided on the second air outlet pipe A, which is recorded as the third valve; A third air outlet B is provided at the air outlet of the third filter; A first air inlet port B is provided at the air inlet of the first filter; A pipeline is provided between the third gas outlet end B and the first gas inlet end C, which is recorded as a third connecting pipe; A first air outlet port B is provided at the air outlet of the first filter; An air outlet pipe is arranged at the first air outlet end B of the first filter, which is referred to as the first air outlet pipe B; For the second filter: A connection node C is provided on the first connecting pipe; A connection node D is provided on the second connecting pipe; A second bypass pipeline is provided, wherein two ends of the second bypass pipeline are respectively connected to the connection node C and the connection node D; A pipeline valve is provided between the connection node C and the second air inlet end A, which is recorded as the fourth valve; A pipeline valve is provided between the connection node D and the second gas outlet B, which is recorded as the fifth valve; A valve is provided at one end of the second bypass pipe where the connection node C is located, which is denoted as the second bypass valve A; A valve is provided at one end of the second bypass pipe where the connection node D is located, which is denoted as the second bypass valve B; A pipeline valve is provided on the third air outlet pipe A, which is recorded as the sixth valve; For the third filter: A connection node E is provided on the second connecting pipe; A connection node F is provided on the third connecting pipe; A third bypass pipe is provided, and two ends of the third bypass pipe are respectively connected to the connection node E and the connection node F; A pipeline valve is provided between the connection node E and the third air inlet terminal A, which is recorded as the seventh valve; A pipeline valve is provided between the connection node F and the third gas outlet end B, which is recorded as the eighth valve; A valve is provided at one end of the third bypass pipe where the connection node E is located, which is denoted as the third bypass valve A; A valve is provided at one end of the third bypass pipe where the connection node F is located, which is denoted as the third bypass valve B; A pipeline valve is provided on the first air outlet pipe B, which is denoted as the ninth valve; A first air inlet port B is provided at the air inlet of the first filter; An air intake pipe is arranged at the first air intake end B of the first filter, which is denoted as the first air intake pipe C; A valve is provided on the first air intake pipe C, which is denoted as the eleventh valve; A first air outlet port C is provided at the air outlet of the first filter; A second air inlet port B is provided at the air inlet of the second filter; A pipe is provided between the first gas outlet end C and the second gas inlet end B, which is recorded as a fourth connecting pipe; A valve is provided at one end of the fourth connecting pipe where the first gas outlet end C is located, which is denoted as the twelfth valve; A valve is provided at one end of the fourth connecting pipe where the second air inlet end B is located, which is denoted as the thirteenth valve; A valve is provided on the first air inlet pipe A, which is denoted as the fourteenth valve; A connection node G is provided between the third valve and the second outlet end A of the second outlet pipe A of the second filter; A connection node H is provided on the second connecting pipe; A pipeline is set between the connection node G and the connection node H, and the pipeline is marked as a marking pipe; A pipeline valve is set on the marked pipe and is marked as the tenth valve.

2. The method for separating and treating industrial waste gas for atmospheric environmental protection according to claim 1, characterized in that: The executing of the first purification strategy comprises: Close the first bypass valve A and the first bypass valve B; Close the ninth and twelfth valves; Close the second bypass valve A, the fifth valve and the tenth valve; Open the first valve, the second valve and the third valve; The original air is passed into the first air inlet pipe A, purified by the first filter, flows from the first connecting pipe into the second filter for purification, and finally discharged from the second air outlet pipe A.

3. The method for separating and treating industrial waste gas for atmospheric environmental protection according to claim 1, characterized in that: The executing the second purification strategy comprises: Close the first valve and the second valve; Open the first bypass valve A and the first bypass valve B; Close the second bypass valve A and the second bypass valve B; Close the third valve and the tenth valve; Open the fourth valve and the fifth valve; Close the third bypass valve A and the eighth valve; Open the sixth valve and the seventh valve; The raw gas is passed into the first intake pipe A, flows out from the first bypass pipe, passes through the first connecting pipe and reaches the second filter for purification; The gas flows out from the second connecting pipe, passes through the third filter, and is discharged from the third outlet pipe A.

4. The method for separating and treating industrial waste gas for atmospheric environmental protection according to claim 1, characterized in that: The executing the third purification strategy comprises: Close the first valve and the second valve; Open the first bypass valve A and the first bypass valve B; Close the fourth valve and the fifth valve; Open the second bypass valve A and the second bypass valve B; Close the sixth valve, the seventh valve, the eighth valve and the tenth valve; Close the third bypass valve A and the third bypass valve B; Close valve No. 12; Open the ninth valve; The raw gas is introduced into the first intake pipe A, flows out from the first bypass pipe, passes through the first connecting pipe, enters the second bypass pipe, enters the second connecting pipe, and then flows to the third filter; After flowing out from the third filter, it passes through the third connecting pipe, enters the first filter, and is discharged from the first outlet pipe B.

5. The method for separating and treating industrial waste gas for atmospheric environmental protection according to claim 1, characterized in that: The executing the fourth purification strategy comprises: Open valve 11; Close the ninth and second valves; Open valves 12 and 13; Close the third valve; Open the tenth valve; Close the seventh and eighth valves; Close the fourth valve and the fifth valve; Open the first bypass valve A, the first bypass valve B, the second bypass valve A, the second bypass valve B, the third bypass valve A and the third bypass valve B; The original air is passed into the first air inlet pipe C and purified by the first filter, then flows into the second filter from the fourth connecting pipe and purified, and then flows into the marking pipe; The exhaust gas purification strategy includes: The composition of the gas in the first air inlet end A and the first air inlet end B is constantly detected. When the gas composition reaches the emission standard, the tenth valve is closed and the third valve is opened.

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