White smoke elimination heat exchange environment-friendly desulfurization system

Abstract

The utility model discloses a white smoke eliminating, heat exchanging and environment-friendly desulfurization system which comprises a main desulfurization tower used for conducting primary treatment on kiln flue gas, the main desulfurization tower is longitudinally arranged, and a flue gas inlet is formed in the bottom of the outer ring face of the main desulfurization tower; the auxiliary desulfurization tower is used for carrying out secondary treatment on the flue gas of the kiln, the auxiliary desulfurization tower is longitudinally arranged, and a flue gas outlet is formed in the top of the auxiliary desulfurization tower; the connecting pipeline is longitudinally arranged, and the two ends of the connecting pipeline are communicated with the main desulfurizing tower and the auxiliary desulfurizing tower respectively. According to the utility model, the desulfurization tower is divided into two parts, and one part is subjected to conventional spraying and demisting, so that dust, sulfide and temperature in flue gas are reduced; the other part of flue gas is subjected to secondary cooling, so that the cooling efficiency is improved; the height of the split desulfurizing tower is reduced, and the mounting is convenient; and a pipeline is designed between the two desulfurization towers, so that the flowing stroke of the flue gas is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of furnace flue gas desulfurization systems, and mainly relates to a white smoke elimination, heat exchange and environmentally friendly desulfurization system. Background Art

[0002] After a series of utilization, the flue gas generated by the kiln will be sent to the desulfurization system. After cooling, dust removal and desulfurization, most of the pollutants in the flue gas will be removed and the qualified flue gas will be discharged into the ambient air. However, the following problems will arise in actual operation: 1. The flue gas contains a lot of heat energy, and the flow rate is too large to quickly reduce the temperature, so a lot of water vapor will be generated; when discharged, the white smoke will be mistaken for harmful gases, so the water vapor must be further removed and turned into invisible gas; 2. After a series of filtration and utilization, the heat energy in the flue gas is still above 200 degrees Celsius. When it is sent to the desulfurization tower for forced cooling, it is impossible to reasonably utilize this heat energy, which wastes heat energy; 3. The old desulfurization tower has the disadvantages of being too high to operate (above 40 meters), and it is impossible to add other equipment for further operation, and the flue gas travel is short and cannot be effectively cooled. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an environmentally friendly desulfurization system for eliminating white smoke, exchanging heat, and adding a secondary desulfurization tower, which accelerates the secondary cooling rate, reduces the height of the desulfurization tower and is easy to install, and connects the pipeline to increase the flow path of the flue gas.

[0004] The technical problem to be solved by the present invention can be achieved by adopting the following technical solutions:

[0005] A white smoke elimination, heat exchange and environmentally friendly desulfurization system, characterized by comprising:

[0006] A main desulfurization tower is used for primary treatment of kiln flue gas, the main desulfurization tower is arranged longitudinally, and a flue gas inlet is arranged at the bottom of the outer annular surface of the main desulfurization tower;

[0007] A secondary desulfurization tower, used for secondary treatment of kiln flue gas, the secondary desulfurization tower is arranged vertically, and a flue gas outlet is arranged at the top of the secondary desulfurization tower;

[0008] A connecting pipeline is longitudinally arranged, and two ends of the connecting pipeline are respectively connected to the main desulfurization tower and the auxiliary desulfurization tower.

[0009] In a preferred embodiment of the utility model, a heat exchanger is transversely arranged at the inner upper part of the secondary desulfurization tower, an air inlet is arranged on one side of the outer ring surface of the heat exchanger, and an air outlet is arranged on the other side of the outer ring surface of the heat exchanger.

[0010] In a preferred embodiment of the present invention, the connecting pipe includes a U-shaped pipe, a longitudinal connecting tube, and a transverse connecting tube. The longitudinal connecting tube is longitudinally arranged, and the transverse connecting tube is transversely arranged. The longitudinal section of the U-shaped pipe is an inverted U shape; the main desulfurization tower, U-shaped pipe, longitudinal connecting tube, transverse connecting tube, and auxiliary desulfurization tower are connected in sequence.

[0011] In a preferred embodiment of the present invention, a main flow-balancing layer, a plurality of main spray layers, and a plurality of main demisting layers are horizontally laid in sequence from bottom to top inside the main desulfurization tower.

[0012] In a preferred embodiment of the utility model, a plurality of middle demisting layers and a plurality of middle spraying layers are horizontally laid in sequence from top to bottom inside the connecting pipe.

[0013] In a preferred embodiment of the present invention, a plurality of auxiliary spray layers and a plurality of auxiliary demisting layers are horizontally laid in sequence from bottom to top inside the auxiliary desulfurization tower.

[0014] In a preferred embodiment of the present utility model, the heat exchanger includes a heat exchange square cylinder, a heat exchange top cylinder, a heat exchange bottom cylinder, a heat exchange support plate, and a plurality of heat exchange tubes. The heat exchange top cylinder, the heat exchange square cylinder, and the heat exchange bottom cylinder are connected in sequence from top to bottom. The heat exchange support plate is longitudinally arranged in the inner middle part of the heat exchange square cylinder. The plurality of heat exchange tubes horizontally pass through the heat exchange support plate and are arranged and laid in the heat exchange square cylinder.

[0015] In a preferred embodiment of the utility model, the longitudinal sections of the pipes at the air inlet and air outlet of the heat exchanger are in the shape of a right-angled trapezoid; the shape of the heat exchange bottom tube is in the shape of a trumpet expanding downward; and the shape of the heat exchange top tube is in the shape of a quadrangular pyramid.

[0016] The beneficial effects of the utility model are: a white smoke heat exchange and environmentally friendly desulfurization system, which splits the desulfurization tower into two parts, one part performs conventional spraying and demisting to reduce dust, sulfide and temperature in the flue gas; the other part performs secondary cooling of the flue gas to improve the cooling efficiency; the height of the desulfurization tower after the split is reduced, and the installation is convenient; and a pipeline is designed between the two desulfurization towers, which increases the flow distance of the flue gas.

[0017] An air heat exchanger is installed in the upper inner part of the auxiliary desulfurization tower for heat energy replacement. When the flue gas passes through the heat exchanger, it replaces and heats the air in the heat exchanger, reduces the flue gas temperature, removes moisture from the water vapor, and eliminates white smoke. At the same time, the replaced high-temperature air heat energy can be sent to other equipment such as kilns for secondary utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a structural schematic diagram of a white smoke elimination, heat exchange and environmentally friendly desulfurization system.

[0019] Figure 2 It is a structural schematic diagram of the heat exchanger of the utility model.

[0020] Figure Number:

[0021] A main desulfurization tower 10; a flue gas inlet 11; a main uniform flow layer 12, a main spray layer 13, and a main demisting layer 14.

[0022] Connecting pipe 20; U-shaped pipe 21, longitudinal connecting tube 22, transverse connecting tube 23; middle demisting layer 24, middle spraying layer 25.

[0023] Auxiliary desulfurization tower 30; flue gas outlet 31; auxiliary spray layer 32, auxiliary demisting layer 33.

[0024] Heat exchanger 40; air inlet 41, air outlet 42; heat exchange square tube 43, heat exchange top tube 44, heat exchange bottom tube 45, heat exchange support plate 46, heat exchange tube 47. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0026] See also Figure 1 , the figure shows a white smoke heat exchange environmental protection desulfurization system, including: a main desulfurization tower 10, used for primary treatment of kiln flue gas, the main desulfurization tower 10 is arranged longitudinally, and a flue gas inlet 11 is arranged at the bottom of the outer ring surface of the main desulfurization tower 10; an auxiliary desulfurization tower 30, used for secondary treatment of kiln flue gas, the auxiliary desulfurization tower 30 is arranged longitudinally, and a flue gas outlet 31 is arranged at the top of the auxiliary desulfurization tower 30; a connecting pipe 20, the connecting pipe 20 is arranged longitudinally, and the two ends of the connecting pipe 20 are connected to the main desulfurization tower 10 and the auxiliary desulfurization tower 30 respectively. The flue gas inlet 11 is a square box. The utility model splits the desulfurization tower into two parts, one part performs conventional spraying and demisting to reduce dust, sulfide and temperature in the flue gas; the other part performs secondary cooling of the flue gas to improve the cooling efficiency; the height of the desulfurization tower after splitting is reduced, and it is easy to install; and a pipeline is designed between the two desulfurization towers, so that the flue gas flow distance is increased.

[0027] Inside the main desulfurization tower 10, a main flow-balancing layer 12, a plurality of main spray layers 13, and a plurality of main demisting layers 14 are horizontally laid in sequence from bottom to top. Specifically, three layers of main spray layers 13 are laid in sequence above the main flow-balancing layer 12, and each layer of the main spray layer 13 is evenly spaced with 8 spray heads for spraying water or biomass. Three layers of main demisting layers 14 are laid in sequence above the main spray layer 13, and each layer of the main demisting layer 14 is evenly spaced horizontally with 4 demisting pipes. The main demisting layer 14 is a ridge-type demister or a tubular demister. In this embodiment, the main demisting layer 14 is a tubular demister.

[0028] The connecting pipe 20 includes a U-shaped pipe 21, a longitudinal connecting tube 22, and a transverse connecting tube 23. The longitudinal connecting tube 22 is longitudinally arranged, and the transverse connecting tube 23 is transversely arranged. The longitudinal section of the U-shaped pipe 21 is an inverted U shape; the main desulfurization tower 10, the U-shaped pipe 21, the longitudinal connecting tube 22, the transverse connecting tube 23, and the auxiliary desulfurization tower 30 are connected in sequence.

[0029] Several middle demisting layers 24 and several middle spraying layers 25 are horizontally laid in sequence from top to bottom inside the longitudinal connecting tube 22 of the connecting pipe 20. Specifically, two layers of middle demisting layers 24 are horizontally laid evenly at intervals above the inside of the longitudinal connecting tube 22, and three demisting pipes are horizontally evenly arranged in each layer of middle demisting layer 24, and the main demisting layer 14 is a tubular demister. A middle spraying layer 25 is laid below the middle demisting layer 24, and four spraying heads are evenly arranged in the middle spraying layer 25 for spraying water or biomass.

[0030] Several auxiliary spray layers 32 and several auxiliary demisting layers 33 are horizontally laid in sequence from bottom to top inside the auxiliary desulfurization tower 30. Specifically, one auxiliary demisting layer 33 is evenly laid in the lower part of the auxiliary desulfurization tower 30, and the auxiliary demisting layer 33 is a ridge-type demisting device. Two auxiliary spray layers 32 are evenly laid below the auxiliary demisting layer 33, and one auxiliary spray layer 32 is laid above the auxiliary demisting layer 33. Each auxiliary spray layer 32 is evenly spaced with 20 spray heads for spraying water or biomass.

[0031] The main desulfurization tower 10, the connecting pipe 20, and the auxiliary desulfurization tower 30 are respectively provided with spraying and demisting facilities to further enhance the desulfurization efficiency and the cooling efficiency.

[0032] Combination Figure 2 A heat exchanger 40 is disposed transversely in the upper inner part of the secondary desulfurization tower 30. An air inlet 41 is disposed on one side of the outer ring surface of the heat exchanger 40, and an air outlet 42 is disposed on the other side of the outer ring surface of the heat exchanger 40. The heat exchanger 40 includes a heat exchange square tube 43, a heat exchange top tube 44, a heat exchange bottom tube 45, a heat exchange support plate 46, and a plurality of heat exchange tubes 47. The heat exchange top tube 44, the heat exchange square tube 43, and the heat exchange bottom tube 45 are connected in sequence from top to bottom. The heat exchange support plate 46 is longitudinally disposed in the inner middle part of the heat exchange square tube 43. A plurality of heat exchange tubes 47 horizontally pass through the heat exchange support plate 46 and are arranged and laid in the heat exchange square tube 43.

[0033] Specifically, the longitudinal sections of the pipes at the air inlet 41 and the air outlet 42 of the heat exchanger 40 are in the shape of a right-angled trapezoid; the shape of the heat exchange bottom tube 45 is in the shape of a trumpet that expands downward and outward; the shape of the heat exchange top tube 44 is in the shape of a quadrangular pyramid, the top of the heat exchange top tube 44 is round, and the bottom of the heat exchange top tube 44 is square. In the above, the air heat exchanger 40 is installed in the upper part of the auxiliary desulfurization tower 30 for heat energy replacement. When the flue gas passes through the heat exchanger 40, the air in the heat exchanger 40 is replaced and heated, the flue gas temperature is reduced, the moisture in the water vapor is removed, and the white smoke is eliminated; at the same time, the replaced high-temperature air heat energy can be sent to other equipment such as kilns for secondary utilization.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A white smoke elimination, heat exchange and environmentally friendly desulfurization system, characterized in that: include, A main desulfurization tower is used for primary treatment of kiln flue gas, the main desulfurization tower is arranged longitudinally, and a flue gas inlet is arranged at the bottom of the outer annular surface of the main desulfurization tower; A secondary desulfurization tower, used for secondary treatment of kiln flue gas, the secondary desulfurization tower is arranged vertically, and a flue gas outlet is arranged at the top of the secondary desulfurization tower; A connecting pipeline is longitudinally arranged, and two ends of the connecting pipeline are respectively connected to the main desulfurization tower and the auxiliary desulfurization tower.

2. The white smoke elimination, heat exchange and environmentally friendly desulfurization system according to claim 1, characterized in that: A heat exchanger is transversely arranged at the inner upper part of the auxiliary desulfurization tower, an air inlet is arranged on one side of the outer ring surface of the heat exchanger, and an air outlet is arranged on the other side of the outer ring surface of the heat exchanger.

3. The white smoke elimination, heat exchange and environmentally friendly desulfurization system according to claim 1, characterized in that: The connecting pipeline includes a U-shaped pipeline, a longitudinal connecting tube, and a transverse connecting tube. The longitudinal connecting tube is longitudinally arranged, and the transverse connecting tube is transversely arranged. The longitudinal section of the U-shaped pipeline is an inverted U shape; the main desulfurization tower, U-shaped pipeline, longitudinal connecting tube, transverse connecting tube, and auxiliary desulfurization tower are connected in sequence.

4. The white smoke elimination, heat exchange and environmentally friendly desulfurization system according to claim 3, characterized in that: A main flow-balancing layer, a plurality of main spray layers, and a plurality of main demisting layers are horizontally laid in sequence from bottom to top inside the main desulfurization tower.

5. The white smoke elimination, heat exchange and environmentally friendly desulfurization system according to claim 3, characterized in that: A plurality of middle demisting layers and a plurality of middle spraying layers are horizontally laid in sequence from top to bottom inside the connecting pipe.

6. The white smoke elimination, heat exchange and environmentally friendly desulfurization system according to claim 2, characterized in that: A plurality of auxiliary spray layers and a plurality of auxiliary demisting layers are horizontally laid in sequence from bottom to top inside the auxiliary desulfurization tower.

7. The white smoke elimination, heat exchange and environmentally friendly desulfurization system according to claim 2, characterized in that: The heat exchanger includes a heat exchange square cylinder, a heat exchange top cylinder, a heat exchange bottom cylinder, a heat exchange support plate, and a plurality of heat exchange tubes. The heat exchange top cylinder, the heat exchange square cylinder, and the heat exchange bottom cylinder are connected in sequence from top to bottom. The heat exchange support plate is longitudinally arranged in the inner middle part of the heat exchange square cylinder. The plurality of heat exchange tubes horizontally pass through the heat exchange support plate and are arranged and laid in the heat exchange square cylinder.

8. The white smoke elimination, heat exchange and environmentally friendly desulfurization system according to claim 7, characterized in that: The longitudinal sections of the pipes at the air inlet and the air outlet of the heat exchanger are in the shape of a right-angled trapezoid; the shape of the heat exchange bottom tube is in the shape of a trumpet expanding downward; and the shape of the heat exchange top tube is in the shape of a quadrangular pyramid.

Images