CN-122006394-A - Setting machine waste gas treatment and waste heat recovery system

CN122006394ACN 122006394 ACN122006394 ACN 122006394ACN-122006394-A

Abstract

The invention relates to a waste gas treatment and waste heat recovery system of a setting machine, which comprises a spray filtration system with suspended backwashing, wherein a venturi tube with low wind resistance is used for removing most of medium and long fibers, oil smoke, dust and the like, porous light high-temperature-resistant easy-cleaning materials are used for filtering dust and oil smoke in different forms in water during filtration and suspended backwashing, the filler is used for filtering the dust and the oil smoke in a compact state, buoyancy of the filler in the water is used for automatically dispersing during backwashing, and oil sludge is recovered by means of oil washing auxiliary agents through suspended rotary friction backwashing without manual cleaning. The heat exchange tube with large tooth pitch and large tube pitch can be cleaned, and meanwhile, the spray water washing device matched with the tooth pitch and the tube pitch can automatically spray degreasing agent and hot water when the pressure difference becomes large, so as to clean greasy dirt and dust on the surface of the heat exchange tube, avoid blockage of the heat exchanger and reduce the reduction of heat exchange efficiency.

Inventors

ZENG QINGFU
LI RONGFEI
GUAN CHAO
LUO LIANG
ZENG FANCHEN

Assignees

广州伊东科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260213

Claims (8)

1. The utility model provides a forming machine exhaust-gas treatment and waste heat recovery system, its characterized in that includes low windage venturi, spray filtration system and the heat transfer system of connecting in order, the entry linkage forming machine exhaust outlet of low windage venturi, the exit linkage of low windage venturi sprays filtration system, sprays filtration system and is used for getting rid of oil smoke, dust in the waste gas through spraying the change of the circulating water and the air current of nonionic surfactant, spray filtration system is used for utilizing porous light packing and spray system filtration waste gas big granule dust and oil smoke to with the waste gas after filtering is input to the heat transfer system, the heat transfer system is used for carrying out the heat transfer to the waste gas after filtering, is provided with suspension recoil system in the spray filtration system, suspension recoil system is used for closing the entry of low windage venturi when spraying filtration system's entry end and exit end air pressure differential is less than the threshold value, carries out the suspension to spray filtration system's porous light packing, opens the entry of low windage venturi after wasing the default time.
2. The exhaust gas treatment and waste heat recovery system of a setting machine according to claim 1, wherein the low windage venturi (2) comprises a constriction section, a throat section and a diffusion section which are sequentially arranged from top to bottom, and the lengths and diameters of the constriction section, the throat section and the diffusion section are determined and adjusted according to the fiber, dust and oil smoke contents in the exhaust gas of the setting machine.
3. The exhaust gas treatment and waste heat recovery system of the setting machine according to claim 1, wherein the spray filtration system comprises a shell, and a demisting silk screen (9), a polygonal ball filler (8), an upper filter screen, a water spray system (5), a porous lightweight filler (4) and a lower filter screen are sequentially arranged in the shell (3) from top to bottom; The upper end of the shell (3) is communicated with the inlet of the heat exchange system through an exhaust gas outlet (10), an air inlet is formed in the side face of the shell (3) and located below the lower filter screen, the air inlet is connected with a low-wind-resistance venturi tube outlet, a water spraying system (5) is arranged above the low-wind-resistance venturi tube and the shell (3), the water spraying system (5) is used for spraying water to the interior of the low-wind-resistance venturi tube and the upper surface of the porous lightweight filler (4), the low-wind-resistance venturi tube is used for guiding the sprayed exhaust gas into the lower part of the lower filter screen, the water outlet at the lower end of the shell (3) is connected with the water tank (7) through a water pipe, the porous lightweight filler (4) is used for filtering the exhaust gas, the demisting silk screen (9) and the polygonal filler (8) are both used for demisting, and the upper filter screen is used for supporting the polygonal filler (8) and limiting the limiting position of the porous lightweight filler (4) to move upwards; The porous lightweight filler is characterized in that a water outlet is formed in a shell (3) on one side of the porous lightweight filler (4), two inclined jet water inlets are formed in the shells (3) on two sides of the porous lightweight filler, the water outlet is connected with a water tank (7) through a water pipe, the jet water inlets are connected with the water tank (7) through a suspension backflushing system (6), the jet water inlets are used for jetting water flow to the porous lightweight filler (4) to clean pumice during backflushing and enable water in a tower to rotate, overflow ports are formed in the side face, above an upper filter screen, of the shell (3), and the overflow ports are communicated with the water tank (7) through water pipes.
4. The waste gas treatment and waste heat recovery system of a setting machine according to claim 1, wherein the heat exchange system comprises a heat exchanger air inlet pipe (11), a heat exchanger air outlet pipe (12), a cooling water inlet (13), a cooling water outlet (14), a spray cleaning system, an overhaul port (15) and a heat exchanger shell (16), the spray cleaning system is used for spraying an aqueous solution of an alkaline nonionic surfactant into the cooling water inlet (13) to clean the heat exchanger pipe, and the heat exchanger air inlet pipe (11) and the heat exchanger air outlet pipe (12) are positioned on the same side of the heat exchanger shell (16).
5. The system according to claim 1, further comprising a pressure detecting device, wherein the pressure detecting device is configured to detect a pressure difference between an exhaust gas inlet end and an exhaust gas outlet end of the exhaust gas recovery system, close the exhaust gas inlet of the exhaust gas recovery system if the pressure difference exceeds a preset threshold, open an inlet of the external exhaust gas treatment system to enable the exhaust gas outlet of the forming machine to be directly connected with the external exhaust gas treatment system, and start the suspension backflushing system to perform cleaning, and automatically open the exhaust gas inlet of the exhaust gas recovery system and close the inlet of the external exhaust gas treatment system after a preset time.
6. The exhaust gas treatment and waste heat recovery system for a setting machine according to any one of claims 3 and 4, wherein valves are provided at respective inlets and outlets of the air inlet pipe (1), the water pipe of the water spray system (5), the water pipe of the suspension backflushing system (6) and the housing (3).
7. The exhaust gas treatment and waste heat recovery system for a setting machine according to claim 4, wherein the water spray system employs a volute spray head.
8. The exhaust gas treatment and waste heat recovery system of the setting machine according to claim 2, wherein a degreasing agent spraying system is arranged between the demisting silk screen (9) and the polygonal ball filler (8), and the degreasing agent spraying system is used for spraying the degreasing agent onto the polygonal ball filler (8).

Description

Setting machine waste gas treatment and waste heat recovery system Technical Field The invention relates to the technical field of clean energy heating, in particular to a waste gas treatment and waste heat recovery system of a setting machine. Background The exhaust gas generated or produced by combustion generally has a certain amount of heat, so that the waste heat in the exhaust gas can be recycled. However, since the exhaust gas generally contains particulate matters, oily matters and the like, the conventional equipment suitable for waste gas waste heat recovery and utilization is often attached to the pipe wall of the heat exchange pipe in the process of carrying out heat transfer on the exhaust gas for a long time, and dust layers formed by the relatively thick particulate matters, oily matters and the like are gradually accumulated on the pipe wall surface against the time lapse, the dust layers are difficult to clean, so that the waste heat conduction conversion rate in the exhaust gas is reduced, the risk of fire is also caused, and when the production amount of the waste gas in unit time is relatively high, the flow rate of the exhaust gas is relatively high, and the exhaust gas subjected to waste heat recovery treatment always has certain heat, so that the waste heat recovery effect is poor and the utilization rate is low. Disclosure of Invention The invention aims to solve the technical problem of providing a waste gas treatment and waste heat recovery system of a setting machine. In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a forming machine exhaust-gas treatment and waste heat recovery system, includes low windage venturi, spray filtration system and the heat transfer system of connecting in order, the entry linkage forming machine exhaust outlet of low windage venturi, the exit linkage of low windage venturi sprays filtration system, sprays filtration system and is used for getting rid of oil smoke, dust in the waste gas through spraying the change of the circulating water and the air current of nonionic surfactant, spray filtration system is used for utilizing porous lightweight filler and spraying system filtration waste gas big granule dust and oil smoke to with the waste gas after filtering is input to the heat transfer system, the heat transfer system is used for carrying out the heat transfer to the waste gas after filtering, is provided with suspension recoil system in the spray filtration system, suspension recoil system is used for closing the entry of low windage venturi when spraying filtration system's backwash entry and exit end air pressure differential is less than the threshold value, suspends the porous lightweight filler of spraying filtration system, opens the entry of low windage venturi after wasing the default time. Further, the low-wind-resistance venturi tube comprises a contraction section, a throat and a diffusion section which are sequentially arranged from top to bottom, and the lengths and the diameters of the contraction section, the throat and the diffusion section are determined and adjusted according to the contents of fiber, dust and oil smoke in waste gas of the setting machine. Further, the spray filtration system comprises a shell, wherein a demisting silk screen, a polygonal ball filler, an upper filter screen, a water spray system, a porous light filler and a lower filter screen are sequentially arranged in the shell from top to bottom; The upper end of the shell is communicated with the inlet of the heat exchange system through an exhaust gas outlet, an air inlet is arranged below a lower filter screen on the side surface of the shell, the air inlet is connected with a low-wind-resistance venturi tube outlet, a water spraying system is arranged above the low-wind-resistance venturi tube and the shell, the water spraying system is used for spraying water to the interior of the low-wind-resistance venturi tube and the upper surface of a porous lightweight filler, the low-wind-resistance venturi tube is used for guiding the sprayed exhaust gas to the lower part of the lower filter screen, a water outlet at the lower end of the shell is connected with a water tank through a water pipe, the porous lightweight filler is used for filtering the exhaust gas, the demisting silk screen and the polygonal filler are both used for demisting, and the upper filter screen is used for supporting the polygonal filler and limiting the upward movement of the porous lightweight filler; The porous lightweight filler is characterized in that a water outlet is formed in a shell on one side of the porous lightweight filler, two inclined jet flow water inlets are formed in the shells on two sides of the porous lightweight filler, the water outlet is connected with a water tank through a water pipe, the jet flow water inlet is connected with the water tank through a suspension backflushing system, the j