Energy-saving and emission-reducing system of industrial kiln

Abstract

The utility model relates to an energy-saving and emission-reducing system of an industrial kiln, which is characterized in that a smoke collecting cavity (12) is used for collecting high-temperature smoke generated in a kiln cavity (13), waste heat in the kiln cavity (13) and waste heat in the smoke collecting cavity (12) both act on a kiln body (10) after calcination is finished, a water pump (19) of a cold water tank (17) is turned on to provide cold water for a heat exchange cavity (16), the temperature of water in the heat exchange cavity (16) is measured in real time through a temperature sensor, and the temperature of water in the heat exchange cavity (16) is measured in real time. When the water temperature rises to a preset value such as boiling, a water pump (19) of the hot water tank (18) is turned on to store hot water in the heat exchange cavity (16), meanwhile, the cold water tank (17) provides cold water into the heat exchange cavity (16) to form heat exchange circulation, and the hot water in the heat exchange cavity (16) is emptied until the temperature of the furnace body (10) drops to the preset value such as room temperature, so that the heat recovery effect of the furnace body (10) is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial furnaces, in particular to an energy-saving and emission-reduction system for industrial furnaces. Background Art

[0002] An industrial furnace is a heating device used in industrial production. Its main function is to heat raw materials to a certain temperature for physical or chemical changes. It can be made into various sizes according to needs and can operate using combustible gas, oil, or electricity. The Chinese utility model patent with the authorization announcement number CN220230094U discloses a regenerative energy-saving and environmental-friendly industrial furnace. A heat exchange cavity is opened in the furnace body. Adding cold water into the heat exchange cavity can recover the heat of the furnace body and quickly cool it. The obtained hot water can be taken out for use or preheat the furnace body next time. At the same time, a purification bin is used to treat the flue gas discharged from the furnace body, which is more environmentally friendly. However, the defect of the above solution is that the heat of the high-temperature flue gas discharged from the furnace body is not recovered, and the temperature of the furnace body is relatively high after calcination. A certain amount of water has a poor heat recovery effect on it. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is that the existing industrial furnace does not recover the heat of the high-temperature flue gas discharged from the furnace body, and the temperature of the furnace body is relatively high after calcination. A certain amount of water has a poor heat recovery effect on it.

[0004] To solve the above problems, the utility model provides an energy-saving and emission-reduction system for industrial furnaces. A cavity is formed inside the furnace body and is separated by a partition into a smoke collecting cavity above and a furnace cavity below. The smoke collecting cavity and the furnace cavity are connected through smoke holes on the partition. A cleaning component communicated with the smoke collecting cavity is arranged outside the furnace body. A heat exchange cavity is arranged inside the furnace body around the smoke collecting cavity and the furnace cavity. A cold water tank and a hot water tank are respectively arranged on both sides of the furnace body. Both the cold water tank and the hot water tank are communicated with the heat exchange cavity through water pumps. A plurality of temperature sensors are arranged inside the heat exchange cavity for measuring the water temperature inside the heat exchange cavity in real time and controlling the start and stop of the two water pumps according to the water temperature.

[0005] The energy-saving and emission-reduction system for industrial furnaces provided by the utility model also has the following technical features:

[0006] A valve is arranged on the side of the water pump close to the furnace body.

[0007] The cleaning component is communicated with the smoke collecting cavity through a smoke pipe. A valve and a fan are arranged on the smoke pipe in sequence. A ventilation pipe for communicating the smoke collecting cavity with the external air is arranged on the furnace body. A valve is arranged on the ventilation pipe.

[0008] An opening is arranged on the front side of the furnace body and is covered by a cover plate. The shape of the horizontal cross-section of the heat exchange cavity is C-shaped.

[0009] A plurality of heat conducting fins are provided inside the furnace body, and both ends of the heat conducting fins extend into the furnace cavity and the heat exchange cavity respectively.

[0010] A heat insulation cover is provided outside the furnace body, and a heat preservation layer is provided inside the heat insulation cover.

[0011] A plurality of spray holes communicating with the furnace cavity are formed in the partition plate, and an oxygen supply tank is provided outside the furnace body for supplying oxygen to the spray holes.

[0012] An oxygen collecting tank connected to the oxygen supply tank is formed inside the partition plate, and a plurality of diversion holes are formed at intervals along the circumferential direction of the oxygen collecting tank inside the partition plate. One end of each diversion hole can communicate with the oxygen collecting tank, and the other end communicates with an annular uniformly distributed hole. The plurality of spray holes communicate with the annular uniformly distributed hole and are arranged at intervals along the circumferential direction of the oxygen collecting tank.

[0013] The utility model has the following beneficial effects: the high-temperature flue gas generated in the furnace cavity is collected through the smoke collecting cavity. After the calcination is completed, the waste heat in the furnace cavity and the waste heat in the smoke collecting cavity both act on the furnace body. The water pump of the cold water tank is turned on to supply cold water to the heat exchange cavity, and the water temperature in the heat exchange cavity is measured in real time through a temperature sensor. When the water temperature rises to a preset value, such as boiling, the water pump of the hot water tank is turned on to store the hot water in the heat exchange cavity, and at the same time, the cold water tank supplies cold water to the heat exchange cavity to form a heat exchange cycle. Until the temperature of the furnace body drops to a preset value, such as room temperature, the hot water in the heat exchange cavity is drained, so as to improve the effect of heat recovery of the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a cross-sectional view of the utility model;

[0015] Figure 2 is Figure 1 the A-A cross-sectional view in

[0016] Figure 3 is Figure 1 the partial enlarged view of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments. It should be noted that, without conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0018] As Figures 1 to 3As shown in the figure, the energy-saving and emission-reduction system for industrial kilns of the present utility model has a cavity formed inside the furnace body 10, which is divided by a partition 11 into a smoke collection cavity 12 above and a furnace cavity 13 below. The smoke collection cavity 12 and the furnace cavity 13 are connected through smoke holes 14 on the partition 11. A cleaning component 15 communicating with the smoke collection cavity 12 is provided outside the furnace body 10. A heat exchange cavity 16 is provided inside the furnace body 10 around the smoke collection cavity 12 and the furnace cavity 13. A cold water tank 17 and a hot water tank 18 are respectively provided on both sides of the furnace body 10. Both the cold water tank 17 and the hot water tank 18 are connected to the heat exchange cavity 16 through water pumps 19. A plurality of temperature sensors 20 are provided in the heat exchange cavity 16 for measuring the water temperature in the heat exchange cavity 16 in real time and controlling the start and stop of the two water pumps 19 according to the water temperature.

[0019] The high-temperature flue gas generated in the furnace cavity 13 is collected through the smoke collection cavity 12. After the calcination is completed, the waste heat in the furnace cavity 13 and the waste heat in the smoke collection cavity 12 both act on the furnace body 10. The water pump 19 of the cold water tank 17 is turned on to supply cold water to the heat exchange cavity 16. The water temperature in the heat exchange cavity 16 is measured in real time through the temperature sensor. When the water temperature rises to a preset value, such as boiling, the water pump 19 of the hot water tank 18 is turned on to store the hot water in the heat exchange cavity 16. At the same time, the cold water tank 17 supplies cold water to the heat exchange cavity 16 to form a heat exchange cycle. Until the temperature of the furnace body 10 drops to a preset value, such as room temperature, the hot water in the heat exchange cavity 16 is drained, thereby improving the effect of heat recovery of the furnace body 10.

[0020] Among them, it also includes a control module electrically connected to the switches of the temperature sensors 20 and the water pumps 19 at the same time. The control module controls the start and stop of the two water pumps 19 respectively according to the water temperature in the heat exchange cavity 16 obtained in real time. The preset value to which the water temperature in the heat exchange cavity 16 can rise and the preset value to which it can drop can be selected and set according to actual applications. For example, the preset value for rising can be any temperature between 60 and 100 °C, preferably 100 °C, which is the boiling point of water. The preset value for dropping can be any temperature between 25 °C (room temperature) and 60 °C, preferably 25 °C (room temperature). Therefore, when the water temperature in the heat exchange cavity 16 rises or drops to the corresponding preset value, the control module controls the start and stop of the corresponding water pump 19.

[0021] Among them, a heat preservation board is provided outside the hot water tank 18 for heat preservation of the hot water.

[0022] Preferably, a valve 21 is provided on the side of the water pump 19 close to the furnace body 10.

[0023] Among them, the water pump 19 of the cold water tank 17 is a one-way pump, and the specific model can be selected and set. Its setting method is: the water inlet pipe of the water pump 19 communicates with the inside of the cold water tank 17, the water outlet pipe of the water pump 19 communicates with the heat exchange cavity 16, and a valve 21 is provided on the water outlet pipe; a pipe body communicating with external cold water is provided on the cold water tank 17.

[0024] Among them, the water pump 19 of the hot water tank 18 is a two-way pump, such as a two-way gear pump, and the specific model can be selected and set. Its working principle is that two or more gears sealed in a housing transport liquid through the change in the working space volume generated during the meshing process. The pump shaft can rotate forward or backward to achieve two-way liquid transportation. Its installation method is as follows: the water pipe on one side of the water pump 19 is connected to the inside of the hot water tank 18, the water pipe on the other side of the water pump 19 is connected to the heat exchange chamber 16, and a valve 21 is provided on the water pipe on the other side; a pipe body for transporting hot water to the outside is provided on the hot water tank 18.

[0025] By setting the water pump 19 of the hot water tank 18 as a two-way pump, the hot water stored in the hot water tank 18 can be used to preheat the furnace body 10 or be transported to the outside for use.

[0026] Preferably, the cleaning assembly 15 is connected to the smoke collecting chamber 12 through a smoke pipe 22, and a valve 21 and a fan 23 are sequentially provided on the smoke pipe 22; a ventilation pipe 24 for connecting the smoke collecting chamber 12 with the outside air is provided on the furnace body 10, and a valve 21 is provided on the ventilation pipe 24.

[0027] Among them, the cleaning assembly 15 includes a structure for purifying the flue gas generated by calcination. For example, large particle dust and soot in the flue gas are removed through a filter screen to reduce the burden on subsequent treatment equipment; particulate matter and soot in the flue gas are further removed through a bag filter or an electrostatic precipitator; SO X is treated through lime milk or wet desulfurization with gypsum; NO X is treated through selective catalytic reduction SCR or selective non-catalytic reduction SNCR technology; harmful substances in the flue gas are adsorbed through activated carbon. The cleaning assembly 15 includes but is not limited to the above structures. The structure for purifying the flue gas generated by calcination is prior art and will not be elaborated here.

[0028] Preferably, referring to Figure 2 , an opening is provided on the front side of the furnace body 10 and is covered by a cover plate 25; the shape of the horizontal cross-section of the heat exchange chamber 16 is C-shaped.

[0029] Among them, one side of the cover plate 25 is hinged to the furnace body 10, and the other side is connected to the furnace body 10 through a locking structure, and the cover plate 25 can be opened or closed through a handle.

[0030] Preferably, a plurality of heat conducting fins 26 are provided inside the furnace body 10, and both ends of the heat conducting fins 26 extend into the furnace chamber 13 and the heat exchange chamber 16 respectively to increase the heat conducting area and improve the heat conducting efficiency of the water in the furnace chamber 13, the smoke collecting chamber 12 and the heat exchange chamber 16.

[0031] Preferably, a heat insulation cover 27 is provided on the outside of the furnace body 10, and a heat preservation layer 28 is provided on the inner side of the heat insulation cover 27.

[0032] Preferably, refer to Figure 1 , Figure 3 , a plurality of spray holes 31 communicating with the furnace cavity 13 are formed in the partition plate 11, and an oxygen supply tank 32 is arranged outside the furnace body 10 to supply oxygen to the spray holes 31. By introducing pure oxygen into the furnace body 10 for combustion, incomplete combustion is avoided, so as to achieve the purpose of energy saving, and at the same time, the emissions of CO, CO2, SO X , NO X and soot can be reduced.

[0033] Among them, a pressure gauge 33 is arranged on the oxygen supply tank 32.

[0034] Preferably, an oxygen collecting tank 34 connected to the oxygen supply tank 32 is formed in the partition plate 11. A plurality of diversion holes 35 are arranged at intervals along the circumferential direction of the oxygen collecting tank 34 in the partition plate 11. One end of the diversion hole 35 can communicate with the oxygen collecting tank 34, and the other end communicates with an annular distribution hole 36. A plurality of spray holes 31 communicate with the annular distribution hole 36 and are arranged at intervals along the circumferential direction of the oxygen collecting tank 34.

[0035] Oxygen is collected in the oxygen collecting tank 34 from the oxygen supply tank 32, flows into the annular distribution hole 36 through a plurality of diversion holes 35, and is finally evenly sprayed into the furnace cavity 13 through the spray holes 31, avoiding the phenomenon of local incomplete combustion in the furnace cavity 13 caused by uneven oxygen supply.

[0036] Preferably, an oxygen pipe 37 penetrating through the smoke collecting cavity 12 is arranged in the furnace body 10. One end of the oxygen pipe 37 communicates with the oxygen collecting tank 34, and the other end communicates with the oxygen supply tank 32. A heat insulation pipe 38 is arranged in the smoke collecting cavity 12, and the heat insulation pipe 38 is arranged outside the oxygen pipe 37; the bottom of the oxygen collecting tank 34 penetrates through the partition plate 11 and is sealed to the oxygen collecting tank 34 through a buckle plate 39. A push plate 40 is slidably arranged in the oxygen collecting tank 34, and the push plate 40 is connected to the buckle plate 39 through a spring 41.

[0037] When oxygen is not supplied, the spring 41 is in a free state, and the lower surface of the push plate 40 is higher than the diversion hole 35, so that the oxygen pipe 37 is disconnected from the diversion hole 35, thereby disconnecting the communication between the furnace cavity 13 and the oxygen pipe 37. When oxygen is supplied, oxygen is collected in the oxygen collecting tank 34 from the oxygen supply tank 32 through the oxygen pipe 37. Under the action of its pressure, the oxygen pushes the push plate 40 to slide downward along the oxygen collecting tank 34 against the elastic force of the spring 41, so that the oxygen pipe 37 is communicated with the diversion hole 35 through the oxygen collecting tank 34, and thus oxygen is supplied to the furnace cavity 13 through the spray holes 31, further avoiding the phenomenon of local incomplete combustion in the furnace cavity 13 caused by uneven oxygen supply.

[0038] Among them, a valve 21 is arranged on the oxygen pipe 37 outside the furnace body 10.

[0039] Among them, the buckle plate 39 is detachably and sealingly connected to the partition plate 11 to realize the sealing of the oxygen collecting tank 34.

[0040] The working principle of the present utility model is as follows:

[0041] The high-temperature flue gas generated by calcination in the furnace chamber 13 is collected through the smoke collecting chamber 12. After the calcination is completed, the waste heat in the furnace chamber 13 and the waste heat in the smoke collecting chamber 12 both act on the furnace body 10. The water pump 19 and the valve 21 of the cold water tank 17 are opened to supply cold water to the heat exchange chamber 16. The heat of the furnace body 10 will cause the water temperature in the heat exchange chamber 16 to rise. The water temperature in the heat exchange chamber 16 is measured in real time by a temperature sensor. When the water temperature rises to boiling, the water pump 19 and the valve 21 of the hot water tank 18 are opened, and the hot water in the heat exchange chamber 16 flows into the hot water tank 18 for storage. At the same time, the cold water tank 17 is continuously controlled to supply cold water to the heat exchange chamber 16, so as to form a heat exchange cycle. Until the temperature of the furnace body 10 drops to room temperature, the cold water tank 17 is controlled to stop supplying cold water, and the hot water in the heat exchange chamber 16 is drained, so as to improve the effect of heat recovery of the furnace body 10; Since the water pump 19 on the hot water tank 18 is a two-way pump, the hot water in the hot water tank 18 can preheat the furnace chamber 16 or be transported to the outside for use;

[0042] During the above-mentioned calcination process, the valve 21 on the oxygen pipe 37 is opened, so that oxygen is collected in the oxygen collecting tank 34 from the oxygen supply tank 32 through the oxygen pipe 37. Under the action of its pressure, the oxygen pushes the push plate 40 to slide downward along the oxygen collecting tank 34 against the elastic force of the spring 41, so that the oxygen pipe 37 is communicated with the diversion hole 35 through the oxygen collecting tank 34. The oxygen in the oxygen collecting tank 34 passes through the diversion hole 35 and the annular evenly distributed holes 36 and is finally evenly sprayed into the furnace chamber 13 through the spray holes 31, avoiding the phenomenon of local incomplete combustion in the furnace chamber 13 caused by incomplete combustion and uneven oxygen supply, so as to achieve the purpose of energy saving, and at the same time can reduce the emissions of CO, CO2, SO X , NO X and soot.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An industrial furnace energy-saving and emission-reduction system, characterized in that, The interior of the furnace body (10) forms a cavity, which is divided by a partition plate (11) into a smoke collecting cavity (12) above and a furnace cavity (13) below. The smoke collecting cavity (12) is communicated with the furnace cavity (13) through a smoke hole (14) on the partition plate (11). A cleaning component (15) communicated with the smoke collecting cavity (12) is arranged outside the furnace body (10); a heat exchange cavity (16) is arranged inside the furnace body (10) around the smoke collecting cavity (12) and the furnace cavity (13). A cold water tank (17) and a hot water tank (18) are respectively arranged on two sides of the furnace body (10). The cold water tank (17) and the hot water tank (18) are both communicated with the heat exchange cavity (16) through water pumps (19). A plurality of temperature sensors (20) are arranged in the heat exchange cavity (16) for measuring the water temperature in the heat exchange cavity (16) in real time and controlling the start and stop of the two water pumps (19) according to the water temperature.

2. The energy conservation and emission reduction system for industrial kilns according to claim 1, wherein A valve (21) is arranged on one side of the water pump (19) close to the furnace body (10).

3. The energy-saving and emission-reduction system for industrial kilns according to claim 1, wherein The cleaning component (15) is communicated with the smoke collecting cavity (12) through a smoke pipe (22). A valve (21) and a fan (23) are successively arranged on the smoke pipe (22); a ventilation pipe (24) for communicating the smoke collecting cavity (12) with the external air is arranged on the furnace body (10), and a valve (21) is arranged on the ventilation pipe (24).

4. The energy-saving and emission-reduction system for industrial kilns according to claim 1, wherein, An opening is arranged on the front side of the furnace body (10) and is covered by a cover plate (25); the shape of the horizontal cross-section of the heat exchange cavity (16) is C-shaped.

5. The energy-saving and emission-reduction system for industrial kilns according to claim 1, characterized in that, A plurality of heat conducting fins (26) are arranged inside the furnace body (10), and both ends of the heat conducting fins (26) respectively extend into the furnace cavity (13) and the heat exchange cavity (16).

6. The energy-saving and emission-reduction system for industrial kilns according to claim 1, wherein A heat insulation cover (27) is arranged outside the furnace body (10), and a heat preservation layer (28) is arranged on the inner side of the heat insulation cover (27).

7. The energy conservation and emission reduction system for industrial kilns according to claim 1, characterized in that, A plurality of spray holes (31) communicated with the furnace cavity (13) are formed in the partition plate (11), and an oxygen supply tank (32) is arranged outside the furnace body (10) for supplying oxygen to the spray holes (31).

8. The industrial furnace energy conservation and emission reduction system according to claim 7, characterized in that, An oxygen collecting groove (34) connected with the oxygen supply tank (32) is formed in the partition plate (11). A plurality of diversion holes (35) are arranged at intervals along the circumferential direction of the oxygen collecting groove (34) inside the partition plate (11). One end of each diversion hole (35) can be communicated with the oxygen collecting groove (34), and the other end is communicated with an annular uniformly distributed hole (36). The plurality of spray holes (31) are communicated with the annular uniformly distributed hole (36) and are arranged at intervals along the circumferential direction of the oxygen collecting groove (34).

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