Printing tail gas treatment system
By designing a printing exhaust gas treatment system including a wind reduction and concentration collection module, a water absorption tower, an adsorption module and a wastewater purification module, the problem of low organic solvent concentration in the printing workshop is solved, and efficient waste gas and wastewater treatment is achieved, reducing treatment costs and ensuring no wastewater discharge.
Patent Information
- Application Number
- CN202421924675.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The volatile organic solvent concentration in the printing workshop is low and difficult to deal with, resulting in waste of resources and pollution, and high treatment costs.
Design a printed exhaust gas treatment system, including a wind reduction and concentration collection module, a water absorption tower, an adsorption module and a wastewater purification module, and improve the treatment efficiency of waste gas and wastewater through technical means such as adsorption and steam heating.
It effectively improves the treatment efficiency of waste gas and wastewater, realizes efficient recycling of organic solvents and purification of wastewater, reduces treatment costs, and ensures no wastewater discharge.
Smart Images
Figure CN222889609U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printing tail gas treatment, in particular to a printing tail gas treatment system. Background Art
[0002] The ink tanks and other points in the printing workshop will volatilize organic solvents into the air, causing the workshop air to contain a certain concentration of organic solvents. The workshop space is large and the VOCS concentration in the space is low. Discharging it to the outside through a fan is both a waste and a pollution. Due to the low concentration, it is difficult to handle and the processing cost is very high. Summary of the invention
[0003] The utility model aims to provide a printing tail gas treatment system to solve the above technical problems.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] A printing exhaust gas treatment system, characterized in that it includes a wind reduction and concentration increase collection module, a water absorption tower, an adsorption module and a wastewater purification module, the wind reduction and concentration increase collection module is used to increase the exhaust gas concentration, the water absorption tower is used to receive the exhaust gas from the wind reduction and concentration increase collection module, and absorb the gas dissolved in water; the water absorption tower is connected to the adsorption module, the adsorption module is used to adsorb harmful substances in the exhaust gas, the water containing organic solvents generated after the adsorption by the adsorption module is purified by the wastewater purification module, the wastewater purification module includes a solvent tank and a wastewater tank, the solvent tank is connected to the wastewater tank, the solvent tank is used to receive wastewater containing organic solvents and transport it to the wastewater tank, the wastewater tank is provided with a steam coil for receiving saturated steam, and heating the wastewater to evaporate the organic solvent into the solvent tank.
[0006] The utility model is further arranged that the steam coil is connected to a steam pipeline, the steam pipeline has a steam inlet, and a temperature control valve, a filter, and a steam ball valve are sequentially arranged between the steam inlet and the steam coil, and the temperature control valve is used to control the temperature of the wastewater tank.
[0007] The utility model is further arranged that the waste water tank is connected with the solvent tank through a first pipeline and a third pipeline.
[0008] The utility model is further arranged that an aeration pipe is also arranged in the wastewater tank, the aeration pipe is connected to a ventilation pipeline, the ventilation pipeline is located outside the wastewater tank and is provided with a one-way valve and a fan, the aeration pipe aerates the gas generated by the fan, and brings the generated gas containing organic solvent to the water absorption tower and then adsorbs it through the adsorption tower.
[0009] The utility model is further arranged that the wastewater tank is connected with the solvent tank via a second pipeline, and a condenser is arranged on the second pipeline, and the condenser is used to condense the organic solvent produced in the wastewater tank and transport it to the solvent tank.
[0010] The utility model is further arranged that the waste water tank is connected to the solvent tank through a second pipeline and a third pipeline, and a pneumatic ball valve is arranged on the third pipeline near the waste water tank.
[0011] The utility model is further configured that the adsorption module comprises at least 4 adsorption towers connected in sequence, and a heat exchanger is provided between the end of the adsorption tower and the solvent tank.
[0012] Beneficial effects of the utility model: The wastewater containing organic solvents generated after adsorption in the utility model is treated as follows: after desorption in the adsorption tower, the water in the solvent tank flows to the wastewater tank, and the wastewater contains organic solvents such as isopropanol, ethyl acetate, and n-propyl acetate; a steam coil is provided in the wastewater tank, and steam is introduced to heat the wastewater, heating it to above 80°C, maintaining it for about 20-40 minutes, and more than 98% of the organic solvents in the water are evaporated to the solvent tank for recycling and reuse. After the steam heating is completed, air is introduced into the wastewater through a fan, and the residual organic solvents in the water are taken out through the air gas, and then adsorbed and recovered in the adsorption tower. After about 2 hours, the organic matter in the water is basically discharged, and the COD in the water is less than 300mg / L. The water treated in the wastewater tank is used as the water source for the cooling tower to ensure that there is no wastewater discharge. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0014] Figure 1 It is a schematic diagram of an embodiment of the utility model.
[0015] Figure 2 It is a schematic diagram of the concentration-reducing and concentration-enhancing collection module of an embodiment of the utility model.
[0016] Figure 3 It is a schematic diagram of an adsorption module according to an embodiment of the utility model.
[0017] Figure 4 This is a schematic diagram of a water absorption tower according to an embodiment of the utility model.
[0018] Figure 5 This is a schematic diagram of a wastewater purification module according to an embodiment of the utility model.
[0019] Reference numerals:
[0020] 10. Subtraction and concentration collection module; 20. Water absorption tower; 30. Adsorption module; 301. Adsorption tower; 40. Wastewater purification module; 401. Solvent tank; 402. Wastewater tank; 4021. Steam coil; A-1. Steam pipeline; A-2. First pipeline; A-3. Second pipeline; A-4. Third pipeline; A-5. Ventilation pipeline; 50. Temperature control valve; 60. Filter; 70. Steam ball valve; 80. Check valve; 90. Fan; 100. Condenser; 110. Heat exchanger; DETAILED DESCRIPTION
[0021] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.
[0022] like Figure 1-5 As shown, the utility model is a printing exhaust gas treatment system, including a wind reduction and concentration increase collection module, a water absorption tower 20, an adsorption module 30 and a wastewater purification module 40, the wind reduction and concentration increase collection module is used to increase the exhaust gas concentration, the water absorption tower 20 is used to receive the exhaust gas from the wind reduction and concentration increase collection module, and absorb the gas dissolved in water; the water absorption tower 20 is connected to the adsorption module 30, the adsorption module 30 is used to adsorb harmful substances in the exhaust gas, the water containing organic solvents generated after the adsorption by the adsorption module 30 is purified by the wastewater purification module 40, the wastewater purification module 40 includes a solvent tank 401 and a wastewater tank 402, the solvent tank 401 is connected to the wastewater tank 402, the solvent tank 401 is used to receive wastewater containing organic solvents and transport it to the wastewater tank 402, the wastewater tank 402 is provided with a steam coil 4021 for receiving saturated steam, and heating the wastewater to evaporate the organic solvent into the solvent tank.
[0023] The steam coil 4021 described in the utility model is connected to a steam pipeline A-1, and the steam pipeline A-1 has a steam inlet. A temperature control valve 50, a filter 60, and a steam ball valve 70 are sequentially arranged between the steam inlet and the steam coil 4021. The temperature control valve 50 is used to control the temperature of the wastewater tank.
[0024] The waste water tank 402 and the solvent tank 401 in the present invention are connected through the first pipeline A-2 and the third pipeline A-4.
[0025] In the utility model, an aeration pipe is also provided in the wastewater tank 402, and the aeration pipe is connected to the ventilation pipe A-5. The ventilation pipe A-5 is located outside the wastewater tank 402 and is provided with a one-way valve 80 and a fan 90. The aeration pipe aerates the gas generated by the fan 90, and brings the generated gas containing organic solvents to the water absorption tower 20 and then adsorbs it through the adsorption tower 301.
[0026] The wastewater tank 402 in the present invention is connected to the solvent tank via a second pipeline A-3, and a condenser 100 is provided on the second pipeline A-3. The condenser 100 is used to condense the organic solvent generated in the wastewater tank 402 and transport it to the solvent tank.
[0027] The wastewater tank 402 in the present invention is connected to the solvent tank through the second pipeline A-3 and the third pipeline A-4, and a pneumatic ball valve is arranged near the wastewater tank 402 on the third pipeline A-4.
[0028] The adsorption module 30 in the present invention includes at least four adsorption towers 301 connected in sequence, and a heat exchanger 110 is provided between the end of the adsorption tower 301 and the solvent tank 401 .
[0029] The wastewater containing organic solvents generated after adsorption in the utility model is treated as follows: after desorption in the adsorption tower 301, the water in the solvent tank 401 flows to the wastewater tank 402, and the wastewater contains organic solvents such as isopropanol, ethyl acetate, and n-propyl acetate; a steam coil 4021 is provided in the wastewater tank 402, and steam is introduced to heat the wastewater to above 80°C, which is maintained for about 20-40 minutes, and more than 98% of the organic solvents in the water are evaporated to the solvent tank 401 for recycling. After the steam heating is completed, air is introduced into the wastewater through the fan 90, and the residual organic solvents in the water are taken out through the air gas, and then adsorbed and recovered in the adsorption tower 301. After about 2 hours, the organic matter in the water is basically discharged, and the COD in the water is less than 300mg / L. The water treated in the wastewater tank 402 is used as the water source for the cooling tower to ensure that there is no wastewater discharge.
[0030] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.
[0031] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.
[0032] The above description shows and describes several preferred embodiments of the utility model, but as before, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention and creation of this article through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.
Claims
1. A printing exhaust gas treatment system, characterized in that: It includes a wind reduction and concentration increase collection module, a water absorption tower, an adsorption module and a wastewater purification module. The wind reduction and concentration increase collection module is used to increase the exhaust gas concentration. The water absorption tower is used to receive the exhaust gas from the wind reduction and concentration increase module and absorb the gas dissolved in water. The water absorption tower is connected to the adsorption module. The adsorption module is used to adsorb harmful substances in the exhaust gas. The water containing organic solvents generated after adsorption by the adsorption module is purified by the wastewater purification module. The wastewater purification module includes a solvent tank and a wastewater tank. The solvent tank is connected to the wastewater tank. The solvent tank is used to receive wastewater containing organic solvents and transport it to the wastewater tank. A steam coil is provided in the wastewater tank to receive saturated steam, heat the wastewater, and evaporate the organic solvent into the solvent tank.
2. A printing exhaust gas treatment system as claimed in claim 1, characterized in that: The steam coil is connected to a steam pipeline, the steam pipeline has a steam inlet, and a temperature control valve, a filter, and a steam ball valve are sequentially arranged between the steam inlet and the steam coil. The temperature control valve is used to control the temperature of the wastewater tank.
3. A printing exhaust gas treatment system as claimed in claim 1, characterized in that: The waste water tank is connected to the solvent tank through a first pipeline and a third pipeline.
4. A printing exhaust gas treatment system as claimed in claim 1, characterized in that: An aeration pipe is also provided in the wastewater tank, and the aeration pipe is connected to a ventilation pipeline. The ventilation pipeline is located outside the wastewater tank and is provided with a one-way valve and a fan. The aeration pipe aerates the gas generated by the fan, and brings the generated gas containing organic solvents to the water absorption tower and then adsorbs it through the adsorption tower.
5. A printing exhaust gas treatment system as claimed in claim 1, characterized in that: The wastewater tank is connected to the solvent tank via a second pipeline, and a condenser is provided on the second pipeline. The condenser is used to condense the organic solvent generated in the wastewater tank and transport it to the solvent tank.
6. A printing exhaust gas treatment system as claimed in claim 1, characterized in that: The wastewater tank is connected to the solvent tank through a second pipeline and a third pipeline, and a pneumatic ball valve is arranged on the third pipeline near the wastewater tank.
7. A printing exhaust gas treatment system as claimed in claim 1, characterized in that: The adsorption module comprises at least four adsorption towers connected in sequence, and a heat exchanger is arranged between the end of the adsorption tower and the solvent tank.