Waste gas treatment equipment for setting machine
Through the two-stage combustion technology of combustion chamber and heat storage combustion combined with the energy recovery of the steam generator, the problems of poor purification effect and high operating cost in the exhaust gas treatment equipment of the setter are solved, and the deep purification of exhaust gas and the comprehensive utilization of energy are achieved.
Patent Information
- Application Number
- CN202421164974.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The existing exhaust gas treatment equipment of the stencil machine has problems such as poor purification effect, high equipment operating costs, large energy losses and easy to lead to equipment blockage and failure, especially poor dust and VOCs treatment effects, and complex equipment maintenance.
The combustion chamber and heat storage combustion are used to purify the exhaust gas at high temperature. The heat from the high-temperature flue gas is recovered through the steam generator to generate steam for use in the factory. At the same time, the bag dust collector is used to achieve filtration and purification of dust.
The deep purification of dust and VOCs in the exhaust gas is achieved, which reduces the system operating costs, improves the purification efficiency, and saves the energy required for steam heating through energy recovery.
Smart Images
Figure CN222352340U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste gas treatment, in particular to waste gas treatment equipment for a setting machine. Background Art
[0002] At present, most printing and dyeing factories use wet electrostatic and heat recovery - spray washing - wet electrostatic treatment process to purify the exhaust gas from the setting machine, but there are many process problems during the operation, resulting in low purification effect and normal utilization rate of equipment.
[0003] Wet electrostatic waste gas treatment equipment, this waste gas environmental protection process has the following problems: it is relatively complicated, requiring a high level of transportation, installation and maintenance management of the molding machine waste gas treatment equipment; the equipment has certain requirements for the dust resistivity, so it has certain selections for dust and cannot make all dusts obtain high purification efficiency; the one-time investment is large, the electrostatic precipitator occupies a large area, and the fume particles condense and adhere in the pipeline and equipment, which can easily lead to blockage and failure of the pipeline equipment, and it is also flammable and explosive; it is greatly affected by operating conditions such as gas temperature and humidity, and the same dust will have different effects when operated at different temperatures and humidities. Utility Model Content
[0004] Fabric setting machines are needed in the printing and dyeing process. The setting machines will emit exhaust gas of a certain temperature (such as >150℃) during operation. The exhaust gas contains combustible dust and VOCs. The VOCs contained in it are difficult to handle and are easily attached to the pipes. At present, many printing and dyeing factories use condensation, spraying and demisting methods to handle them. This method has high investment costs, poor treatment effects and is easy to cause energy loss, thus causing environmental pollution. At the same time, the exhaust gas contains more heat, which is not conducive to energy conservation and emission reduction.
[0005] The present invention aims to provide a waste gas treatment device for a setting machine, which can reliably, stably and efficiently treat pollutants in the waste gas discharged by the setting machine, and at the same time, realize the comprehensive utilization of energy and reduce the system operation cost by adopting multiple measures.
[0006] The utility model provides the following technical solutions:
[0007] A waste gas treatment device for a setting machine, comprising an air intake section, a combustion section, a filtering section, and an energy recovery section;
[0008] The air intake link includes a first fan, a first valve, a second valve and a three-way pipe, one end of the three-way pipe is connected to the exhaust gas of the setting machine and the connecting pipe is provided with the first valve, one end is connected to the air and the connecting pipe is provided with the second valve, and one end is connected to the air inlet of the fan;
[0009] The combustion link includes a first burner and a combustion chamber, the combustion chamber is connected to the exhaust port of the fan, the first burner is connected to the combustion chamber, and the combustion chamber is connected to a heat storage combustion device;
[0010] The filtering process includes a steam generator and a bag dust collector, and the steam generator and the bag dust collector are connected.
[0011] The exhaust link includes a second fan and a chimney. The exhaust port of the bag filter is connected to the air inlet of the second fan, and the exhaust port of the second fan is connected to the chimney.
[0012] Preferably, the heat storage combustion equipment consists of a first chamber, a second chamber and a third chamber, a second burner is installed between the first chamber and the second chamber, a third burner is installed between the second chamber and the third chamber, and an air outlet branch pipe and an air inlet branch pipe are provided at the lower end of each chamber, and each branch pipe is respectively provided with a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, and an eighth valve, each air inlet branch pipe is connected to a main air inlet pipe, and the main air inlet pipe is connected to the combustion chamber, and each air outlet branch pipe is connected to a main air outlet pipe, and the main air outlet pipe is connected to a steam generator.
[0013] Preferably, the flue gas temperature in the chamber connected to the top of the heat storage combustion equipment is greater than 800°C, and the exhaust flue gas temperature is greater than 100°C.
[0014] Preferably, the energy recovery link includes a main exhaust pipe of a heat storage combustion device connected to the flue gas inlet of a steam generator, the lower end of the working fluid side of the steam generator is connected to hot water, and the upper end is connected to a steam buffer storage tank through a steam pipe, and the heat of the high-temperature flue gas is used to heat the water into steam with certain pressure and temperature parameters for use in other steam-using links in the factory.
[0015] Preferably, the first chamber, the second chamber and the third chamber may be filled with one or more layers of honeycomb heat storage body.
[0016] Preferably, a first dust detector is installed at the air inlet front end of the bag collector to detect whether the dust concentration in the blown gas reaches the equipment startup standard during the purge link before startup, and a second dust detector is installed at the exhaust rear end of the bag collector to detect whether the dust concentration in the treated flue gas reaches the emission standard during the operation of the equipment.
[0017] Preferably, a first temperature measuring point and a first pressure measuring point are provided at the front end of the thermal storage combustion equipment, a second temperature measuring point and a second pressure measuring point are directly provided at the rear end of the thermal storage combustion equipment and the steam generator, a third temperature measuring point and a first dust detector are provided between the steam generator and the bag dust collector, and a second dust detector is provided between the second fan and the chimney. The temperature measuring point is detected by a temperature detector, and the pressure measuring point is detected by a pressure detector, which are used to detect whether the temperature and pressure of the detection area reach the set values during preheating, normal operation and shutdown.
[0018] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.
[0019] The utility model adopts a two-stage combustion method of combustion chamber combustion and heat storage combustion to perform high-temperature combustion purification treatment on the waste gas. The waste gas first enters the combustion chamber for preliminary pretreatment and heating, mainly to preliminarily purify the fluff and other combustible dust in the waste gas, and then connects to the heat storage combustion system. After high-temperature combustion, the organic gas in the waste gas is deeply decomposed. By using heat storage to recycle the high-temperature waste heat in the flue gas, the waste gas is heated to save heating fuel. The flue gas generated by the heat storage combustion system is connected to the steam generator, and the heat of the flue gas is used to generate steam through the steam generator. The flue gas outlet of the steam generator is connected to the bag filter, and the bag filter flue gas outlet is connected to the fan, and the dust-removed flue gas is discharged into the atmosphere through the chimney. The specific operation process is as follows:
[0020] The system needs to be purged before starting. The specific operation is as follows: air is introduced into the combustion chamber through the fan and blown into the heat storage combustion equipment. After the purge gas is purged, it passes through the steam generator, the second dust detector, the bag dust collector, and is blown into the chimney by the fan for discharge.
[0021] After the purge is completed, the equipment enters the preheating stage. The combustion chamber and the internal temperature of the heat storage combustion equipment are heated by the burner. When the temperature of the combustion chamber and the internal temperature of the heat storage combustion equipment reach the set temperature, the preheating is completed.
[0022] After preheating is completed, the system enters the normal operation stage. The industrial waste gas first enters the combustion chamber for preliminary pretreatment and heating, mainly to preliminarily purify the fluff and other combustible dust in the waste gas, and then connects to the heat storage combustion system to perform high-temperature combustion and deep purification of the gas phase organic matter in the waste gas. The flue gas outlet of the heat storage combustion system is connected to the steam generator, and the high-temperature flue gas enters the steam generator and exchanges heat with hot water. The heat of the high-temperature flue gas is used to heat the water into steam of a certain pressure and temperature, which is used for other steam-using links in the factory. The flue gas outlet of the steam generator is connected to the bag filter, and the flue gas cooled by the steam generator is passed into the bag filter to filter out the dust in the flue gas. The flue gas outlet of the bag filter is connected to the fan, and the dust-removed flue gas is connected to the chimney and discharged into the atmosphere.
[0023] When the system needs to stop working, it needs to be cooled and purged first. Each burner is in the flameout state. The air is passed into the combustion chamber and the heat storage combustion equipment in turn through the fan to cool the system. The heated air then flows through the steam generator. The hot water is passed into the steam generator through the pipeline. The high-temperature air transfers heat to the hot water to generate steam for use in other steam-using links in the factory. The air is blown into the bag filter to filter out the dust in the air. The air is blown into the chimney and discharged from the chimney. When the outlet air temperature of the heat storage combustion system and the dust concentration before the bag filter are stably below the set value, it means that the shutdown cooling is completed, and finally the fans and valves in the system are closed.
[0024] The beneficial effects are:
[0025] The first-stage combustion chamber can purify dust such as fluff in the exhaust gas, and the second-stage heat storage combustion can deeply purify VOCs in the exhaust gas. Through two-stage combustion, deep purification of combustibles in the exhaust gas can be achieved stably and reliably.
[0026] By installing a bag dust collector, the dust in the exhaust gas after combustion can be filtered and purified to meet the emission standards.
[0027] The heat storage combustion method saves the fuel consumed in heating the exhaust gas to a higher temperature, such as >800°C, and reduces the system operation cost.
[0028] The steam generator can be used to exchange energy with the waste gas after high-temperature burning to produce steam, which can be used in other steam-using links in the factory. This can greatly save the energy required for steam heating. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 A structural schematic diagram of an exhaust gas treatment device for a setting machine provided by an embodiment of the utility model is shown in the figure:
[0030] 1. First valve; 2. Second valve; 3. First fan; 4. First burner; 5. Combustion chamber; 6. First temperature measuring point; 7. First pressure measuring point; 8. Third valve; 9. Fourth valve; 10. Fifth valve; 11. Sixth valve; 12. Seventh valve; 13. Eighth valve; 14. Second burner; 15. Third burner; 16. Second temperature measuring point; 17. Second pressure measuring point; 18. Ninth valve; 19. Tenth valve; 20. Steam generator; 21. Third temperature measuring point; 23. First dust detector; 24. Bag filter; 25. Second fan; 26. Second dust detector; 27. Chimney; 28. First chamber; 29. Second chamber; 30. Third chamber. DETAILED DESCRIPTION
[0031] The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0032] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model.
[0033] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.
[0034] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.
[0035] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the utility model include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.
[0036] Example 1
[0037] Combined with Figure 1 The waste gas is purified by high-temperature combustion in a two-stage combustion mode of combustion chamber combustion and heat storage combustion. The waste gas is the waste gas produced by the setting machine in the printing and dyeing factory. The waste gas first enters the combustion chamber 5 for preliminary pretreatment and heating, mainly for preliminary purification of combustible dust such as fluff in the waste gas, and then is connected to the heat storage combustion equipment. The flue gas outlet of the heat storage combustion equipment is connected to the steam generator 20, and the flue gas outlet of the steam generator 20 is connected to the bag filter 24. The flue gas outlet of the bag filter 24 is connected to the fan 25, and the dust-removed flue gas is connected to the chimney 27 and discharged into the atmosphere.
[0038] The thermal storage combustion equipment needs to be purged before starting. The specific operation is as follows: the V1 valve is closed, the V2 valve is opened, and the air enters the system through the second valve 2, and then flows through the thermal storage combustion equipment, the steam generator 20, and the bag filter 24 in sequence through the first fan 3, and finally blown into the chimney and discharged into the atmosphere through the second fan 25. When the first dust detector 23 detects that the dust meets the standard, it means that the purge is completed;
[0039] After the purging is completed, the equipment enters the preheating stage, the combustion chamber 5 is heated by combustion through the first burner 4, B2 and B3 are started to heat the inside of the heat storage combustion equipment, and when the temperature reaches the requirement, the preheating is completed.
[0040] After preheating is completed, it enters the combustion stage. The exhaust gas from the setting machine is blown into the combustion chamber through the fan 3 for heating and then enters the heat storage combustion equipment for further combustion treatment. After combustion, the high-temperature flue gas enters the steam generator. The flue gas uses the heat to generate and heat up steam. The flue gas temperature drops, and the steam temperature rises to 300°C. The steam flows to the setting machine, and the flue gas temperature drops to 160°C. The bag filter 24 is opened, and the flue gas is blown into the bag filter 24 to filter out large particles of dust in the flue gas. After dust removal, the flue gas passes through the second dust detector 26. After reaching the set standard, the flue gas is discharged from the chimney 27.
[0041] When the equipment needs to stop working, it enters the shutdown cooling phase, and the air is passed into the heat storage combustion equipment through the first fan 3. The high-temperature air flows from the heat storage combustion equipment to the steam generator 20. The steam generator 20 is connected to the external water pipe. The water inlet of the water pipe is provided with a ninth valve 18, and the water outlet of the water pipe is provided with a tenth valve 19. 80°C hot water is passed into the steam generator 20 through the ninth valve 18. The high-temperature air uses the heat to generate and heat up the steam. The temperature of the high-temperature air drops, and the steam temperature rises to 300°C. The air is blown into the bag filter 24 to filter out large particles of dust in the air, and the air is blown into the chimney 27 and discharged from the chimney 27. After the cooling is completed, the purge fan is turned off, and then the inlet and outlet valves of the system are closed.
[0042] Based on the above principles, the technical solution structure of the utility model is as follows:
[0043] Including intake link, combustion link, filtration link, and energy recovery link;
[0044] The air intake link includes a first fan 3, a first valve 1, a second valve 2 and a three-way pipe, one end of the three-way pipe is connected to the exhaust gas of the setting machine and the connecting pipe is provided with the first valve 1, one end is connected to the air and the connecting pipe is provided with the second valve 2, and one end is connected to the air inlet of the fan 3;
[0045] The combustion link includes a first burner 4, a combustion chamber 5, the combustion chamber 5 is connected to the exhaust port of the fan 3, the first burner 4 is connected to the combustion chamber 5, and the combustion chamber 5 is connected to a heat storage combustion device;
[0046] The filtering process includes a steam generator 20 and a bag dust collector 24. The steam generator 20 and the bag dust collector 24 are connected.
[0047] The exhaust link includes a second fan 25 and a chimney 27 . The exhaust port of the bag filter 24 is connected to the air inlet of the second fan 25 , and the exhaust port of the second fan 25 is connected to the chimney 27 .
[0048] In the utility model, the heat storage combustion equipment is composed of a first chamber 28, a second chamber 29 and a third chamber 30. A second burner 14 is installed between the first chamber 28 and the second chamber 29, and a third burner 15 is installed between the second chamber 29 and the third chamber 30. An air outlet branch pipe and an air inlet branch pipe are provided at the lower end of each chamber. Each branch pipe is respectively provided with a third valve 8, a fourth valve 9, a fifth valve 10, a sixth valve 11, a seventh valve 12, and an eighth valve 13. Each air inlet branch pipe is connected to a main air inlet pipe, and the main air inlet pipe is connected to the combustion chamber 5. Each air outlet branch pipe is connected to a main air outlet pipe, and the main air outlet pipe is connected to the steam generator 20.
[0049] In the utility model, the temperature of the smoke in the chamber connected to the top of the heat storage combustion equipment is greater than 800°C, and the temperature of the discharged smoke is greater than 100°C.
[0050] In the utility model, the energy recovery link includes connecting the main exhaust pipe of the heat storage combustion equipment with the flue gas side inlet of the steam generator 20, the lower end of the working medium side of the steam generator 20 is connected to hot water, and the upper end is connected to the steam buffer storage tank through a steam pipe. The heat of the high-temperature flue gas is used to heat the water into steam with certain pressure and temperature parameters for use in other steam-using links in the factory.
[0051] In the present invention, one or more layers of honeycomb heat storage bodies can be filled inside the first chamber 28 , the second chamber 29 and the third chamber 30 .
[0052] In the utility model, a first dust detector 23 is installed at the air inlet front end of the bag dust collector 24, which is used to detect whether the dust concentration in the blown gas reaches the equipment startup standard in the purge link before startup, and a second dust detector 26 is installed at the exhaust rear end of the bag dust collector 24, which is used to detect whether the dust concentration in the treated flue gas reaches the emission standard during the operation of the equipment.
[0053] In the utility model, a first temperature measuring point 6 and a first pressure measuring point 7 are arranged at the front section of the heat storage combustion equipment, a second temperature measuring point 16 and a second pressure measuring point 17 are directly arranged at the rear end of the heat storage combustion equipment and the steam generator 20, a third temperature measuring point 21 and a first dust detector 23 are arranged between the steam generator 20 and the bag filter 24, a second dust detector 26 is arranged between the second fan 25 and the chimney 27, a temperature measuring point is detected by a temperature detector, and a pressure measuring point is detected by a pressure detector, which are used for detecting whether the temperature and pressure of the detection area reach the set values during preheating, normal operation and shutdown.
[0054] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model; in the absence of conflicts, the embodiments of the utility model and the features in the embodiments can be combined with each other. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.
Claims
1. A waste gas treatment device for a setting machine, characterized in that: Including intake link, combustion link, filtration link, and energy recovery link; The air intake link comprises a first fan (3), a first valve (1), a second valve (2) and a three-way pipe, wherein one end of the three-way pipe is connected to the exhaust gas of the setting machine and the connecting pipe is provided with the first valve (1), one end is connected to the air and the connecting pipe is provided with the second valve (2), and one end is connected to the air inlet of the fan (3); The combustion link comprises a first burner (4) and a combustion chamber (5), wherein the combustion chamber (5) is connected to an exhaust port of a fan (3), the first burner (4) and the combustion chamber (5) are connected, and the combustion chamber (5) is connected to a heat storage combustion device; The filtering link comprises a steam generator (20) and a bag dust collector (24), wherein the steam generator (20) and the bag dust collector (24) are connected to each other. The exhaust link comprises a second fan (25) and a chimney (27); the exhaust port of the bag filter (24) is connected to the air inlet of the second fan (25); and the exhaust port of the second fan (25) is connected to the chimney (27).
2. The waste gas treatment equipment of a setting machine according to claim 1, characterized in that: The heat storage combustion device is composed of a first chamber (28), a second chamber (29) and a third chamber (30). A second burner (14) is installed between the first chamber (28) and the second chamber (29), and a third burner (15) is installed between the second chamber (29) and the third chamber (30). An outlet branch pipe and an inlet branch pipe are provided at the lower end of each chamber. A third valve (8), a fourth valve (9), a fifth valve (10), a sixth valve (11), a seventh valve (12) and an eighth valve (13) are provided on each branch pipe. Each inlet branch pipe is connected to a main inlet pipe, and the main inlet pipe is connected to the combustion chamber (5). Each outlet branch pipe is connected to a main outlet pipe, and the main outlet pipe is connected to a steam generator (20).
3. The waste gas treatment equipment of a setting machine according to claim 2, characterized in that: The temperature of the flue gas in the chamber connected to the top of the heat storage combustion equipment is greater than 800°C, and the temperature of the discharged flue gas is greater than 100°C.
4. The waste gas treatment equipment of a setting machine according to claim 3, characterized in that: The energy recovery link includes connecting the main exhaust pipe of the heat storage combustion equipment to the flue gas side inlet of the steam generator (20); the lower end of the working medium side of the steam generator (20) is connected to hot water, and the upper end is connected to the steam buffer storage tank through a steam pipeline, and the heat of the high-temperature flue gas is used to heat the water into steam with certain pressure and temperature parameters for use in other steam-using links in the factory.
5. The waste gas treatment equipment of a setting machine according to claim 4, characterized in that: The first chamber (28), the second chamber (29) and the third chamber (30) may be filled with one or more layers of honeycomb heat storage body.
6. The waste gas treatment equipment of a setting machine according to claim 5, characterized in that: The bag filter (24) is provided with a first dust detector (23) at the air inlet front end for detecting whether the dust concentration in the blown gas reaches the equipment startup standard in the purge process before startup. The bag filter (24) is provided with a second dust detector (26) at the exhaust rear end for detecting whether the dust concentration in the treated flue gas reaches the emission standard during the operation of the equipment.