Search

CN-224230018-U - Waste heat recycling system of RTO waste gas treatment device

CN224230018UCN 224230018 UCN224230018 UCN 224230018UCN-224230018-U

Abstract

The utility model belongs to the technical field of RTO waste gas treatment devices, and particularly relates to a waste heat recycling system of an RTO waste gas treatment device. The waste heat recycling system of the RTO waste gas treatment device comprises an incinerator, two flues are arranged at the hearth of the incinerator, the top of the hearth is connected with a high-temperature flue gas filter set through a high-temperature flue gas pipeline, the high-temperature flue gas filter set is connected with a primary evaporator, the primary evaporator is connected with a superheater, the superheater is connected with a secondary evaporator, the secondary evaporator is provided with a pipeline connected with a shell side inlet of a high-temperature preheater, and a shell side outlet of the high-temperature preheater is connected with a chimney. The waste heat recycling system of the RTO waste gas treatment device realizes full recycling of waste heat, the double-flue design improves the utilization rate of flue gas heat, various heat exchange pipes are designed in the equipment, the heat transfer efficiency is improved, and the stability of system operation is ensured by designing a one-on-one-standby conveying pump and filter group.

Inventors

  • SONG DIANFENG
  • Ji Laikun
  • XU RUYI
  • ZHANG YING
  • NIU RUXUE

Assignees

  • 山东仁丰特种材料股份有限公司

Dates

Publication Date
20260512
Application Date
20250522

Claims (9)

  1. 1. The waste heat recycling system of the RTO waste gas treatment device is characterized by comprising an incinerator (1), a primary evaporator (2) and a softening water tank (12), wherein the top of a hearth of the incinerator (1) is connected with a high-temperature flue gas filter group (7) through a high-temperature flue gas pipeline, the high-temperature flue gas filter group (7) is connected with the primary evaporator (2), the primary evaporator (2) is connected with a superheater (3), the superheater (3) is connected with a secondary evaporator (4), the secondary evaporator (4) is provided with a pipeline connected with a shell side inlet of a high-temperature preheater (5), and a shell side outlet of the high-temperature preheater (5) is connected with a chimney (13); The softening water tank (12) is connected with a tube side inlet of the low-temperature preheater (6) through a conveying pump set, a tube side outlet of the low-temperature preheater (6) is connected with a tube side inlet of the high-temperature preheater (5), a tube side outlet of the high-temperature preheater (5) is provided with a pipeline connected with the secondary evaporator (4), the secondary evaporator (4) is connected with the steam collector (9), the top of the steam collector (9) is provided with a pipeline which flows back to the superheater (3), and the superheater (3) is connected with the saturated steam pipeline (14).
  2. 2. The waste heat recycling system of the RTO waste gas treatment device according to claim 1, wherein a fin heat exchange tube is horizontally arranged inside the primary evaporator (2), a fin heat exchange tube inlet in the primary evaporator (2) is connected with an air pipeline (17), a pipeline which flows back to an inlet of the incinerator (1) is arranged at an outlet of the fin heat exchange tube of the primary evaporator (2), and the inlet of the incinerator (1) is connected with a fuel gas pipeline (15).
  3. 3. The waste heat recycling system of the RTO waste gas treatment device according to claim 1, wherein a middle-temperature flue gas pipeline is arranged in the middle of a hearth of the incinerator (1) and is connected with a middle-temperature flue gas filter group (8), the middle-temperature flue gas filter group (8) is connected with a shell side inlet of a low-temperature preheater (6), and a pipeline connected with a chimney (13) is arranged at a shell side outlet of the low-temperature preheater (6).
  4. 4. The waste heat recycling system of the RTO exhaust gas treatment device according to claim 3, wherein the medium-temperature flue gas filter group (8) and the high-temperature flue gas filter group (7) are composed of two filters which are connected in parallel, and the filters are on one occasion.
  5. 5. The waste heat recycling system of the RTO exhaust gas treatment device according to claim 1, wherein a serpentine drain pipe is arranged in the superheater (3), an inlet of the serpentine drain pipe is connected with an outlet at the top of the steam collector (9), and an outlet of the serpentine drain pipe is connected with a saturated steam pipeline (14).
  6. 6. The waste heat recycling system of the RTO waste gas treatment device according to claim 1, wherein a horizontal calandria is arranged in the secondary evaporator (4), an inlet of the horizontal calandria is connected with the superheater (3), an outlet of the horizontal calandria is connected with a shell side inlet of the high-temperature preheater (5), the shell side inlet of the secondary evaporator (4) is connected with a tube side outlet of the high-temperature preheater (5), and a shell side outlet of the secondary evaporator (4) is connected with the steam collector (9).
  7. 7. The waste heat recycling system of the RTO waste gas treatment device according to claim 6, wherein a water drum (901) is arranged at the bottom of the steam collector (9), a pipeline for returning to a shell side inlet of the secondary evaporator (4) is arranged on the water drum (901), and a gas-liquid separator (902) is arranged at an outlet at the top of the steam collector (9).
  8. 8. The waste heat recycling system of the RTO waste gas treatment device according to claim 1, wherein the conveying pump set consists of two conveying pumps (11) which are connected in parallel, and a control valve (10) is arranged at the inlet of each conveying pump (11).
  9. 9. The waste heat recycling system of the RTO waste gas treatment device according to claim 1, wherein the bottoms of the primary evaporator (2), the superheater (3), the secondary evaporator (4) and the high-temperature preheater (5) are respectively provided with a sewage outlet, and the sewage outlets are respectively connected with a sewage pipeline (16).

Description

Waste heat recycling system of RTO waste gas treatment device Technical Field The utility model belongs to the technical field of RTO waste gas treatment devices, and particularly relates to a waste heat recycling system of an RTO waste gas treatment device. Background RTO has been widely used in industry as a mature waste gas treatment technology, and its working principle is to decompose organic waste gas into harmless carbon dioxide and water by high-temperature oxidation, and a large amount of flue gas is generated in the process, and in industrial production, the high-temperature flue gas (usually above 800 ℃) discharged by RTO equipment contains a large amount of waste heat. The waste heat utilization is mainly focused on the aspects that heat in high-temperature waste gas can be transferred to other mediums such as air, water and the like through a heat exchanger to be used for other technological processes or living heating after the temperature of the waste gas is raised, and the waste heat of the waste gas can be converted into electric energy by adopting an Organic Rankine Cycle (ORC) technology to realize the efficient utilization of energy. CN218120689U discloses an RTO waste gas treatment device with waste heat recovery and reutilization, the device has a partition board, a heat-conducting pipe, an exhaust pipe, an air inlet pipe and the like in a bin body of a waste heat recovery component, a radiating fin is arranged outside the heat-conducting pipe, an active carbon filter screen, a heat accumulation layer and a temperature sensor are also arranged outside the heat-conducting pipe, the waste heat recovery component can efficiently adsorb the waste heat of the RTO waste gas, the heat is convenient to reutilize, the waste gas treatment effect is improved, energy conservation and environmental protection are achieved, but the waste gas treatment on impurities in the waste gas is not mentioned, if the waste gas impurities are more, the service life of the internal structure of the device and the waste heat recovery efficiency can be influenced, and the waste heat recovery can be regulated and controlled inaccurately only by monitoring of the temperature sensor. CN222694304U discloses a waste heat recovery device for RTO exhaust-gas treatment, waste gas import department at RTO exhaust-gas treatment is with waste heat recovery case sets up filtration, filtration mechanism's filter screen filters impurity, self-driven clearance mechanism scrape sediment spiral shell area clearance filter screen, unload sediment mechanism discharge piece, can filter impurity before waste gas gets into the recovery case through filtration structure, avoid blocking up, guarantee waste heat recovery efficiency, and self-driven clearance and unload sediment function have ensured the sustainability of waste gas continuous let in and waste heat recovery, but it is mainly directed against waste gas filtration, waste heat recovery mode has not elaborated, waste heat recovery effect is limited, filtration structure has increased the device complexity, lead to the cost to use of parts such as oblique sediment motor, can increase energy consumption and maintenance cost. Therefore, the waste heat recycling system of the RTO waste gas treatment device is required to be designed, the heat exchange efficiency is improved on the basis of compact structure, and the running stability of the device is ensured. Disclosure of utility model The utility model aims to overcome the defects of the prior art, and provides a waste heat recycling system of an RTO waste gas treatment device, which realizes full recycling of waste heat through the cooperative operation of equipment such as an incinerator, a multistage evaporator, a preheater, various filters and the like, and meanwhile, the double-flue design improves the utilization rate of flue gas heat, various heat exchange pipes are designed in the equipment, the heat transfer efficiency is improved, and a one-on-one-off conveying pump and a one-on-one filter group are designed, so that the running stability of the system is ensured. The waste heat recycling system of the RTO waste gas treatment device comprises an incinerator, wherein two flues are arranged at the position of a hearth of the incinerator, the top of the hearth is connected with a high-temperature flue gas filter set through a high-temperature flue gas pipeline, the high-temperature flue gas filter set is connected with a primary evaporator, the primary evaporator is connected with a superheater, the superheater is connected with a secondary evaporator, the secondary evaporator is provided with a pipeline connected with a shell side inlet of the high-temperature preheater, an outlet of the shell side of the high-temperature preheater is connected with a chimney, a middle-temperature flue gas pipeline is arranged at the middle part of the hearth of the incinerator and is connected with a middle-temperature flue gas filter se