A waste heat utilization device for a desulfurization system

Abstract

The present application relates to the field of waste heat utilization of desulfurization system, and discloses a waste heat utilization device for desulfurization system, which comprises a base, the middle part of the upper end face of the base is fixedly connected with an intermediate cylinder, the left end face of the intermediate cylinder is fixedly installed with a waste gas inlet pipe, and the front part of the outer side wall of the intermediate cylinder is further provided with a driving mechanism; the inner cavity of the intermediate cylinder is fixedly installed with fixed supports on the left and right sides, the inner walls of the fixed supports on the left and right sides are rotatably installed with a transmission rod, the side wall of the transmission rod is provided with a purification mechanism, the inner cavity of the intermediate cylinder is fixedly installed with heat exchange plates on the front and rear sides of the lower side wall, and the inner cavity of the heat exchange plates is provided with a heat exchange mechanism. The device is matched with the purification mechanism and the like through the driving mechanism, realizes the function of absorbing and purifying harmful gases in waste gas, is matched with the heat exchange mechanism and the like, realizes efficient conversion of flue gas heat in waste gas, and significantly improves the utilization quality of waste heat in the desulfurization system.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of waste heat utilization of desulfurization system, in particular to a waste heat utilization device for desulfurization system. BACKGROUND

[0002] At present, the flue gas generated by the coal-fired boiler enters the chimney after passing through the desulfurization tower, the exhaust gas temperature is 50~60℃, contains a large amount of water vapor latent heat, accounts for about 7% of the fuel heat value, causes the waste of energy, and forms the "white smoke" phenomenon. The coal-fired boiler in the north is used as the heat source of the central heating to heat the heat network return water, and the heat network return water is generally at 50~60℃, so the flue gas heat cannot be directly recovered. The existing flue gas waste heat utilization scheme is to obtain low-temperature waste heat by adding a special spray tower or a flue gas heat exchanger after the flue gas outlet of the desulfurization tower, and then to recover the low-temperature waste heat to the heating network by using the absorption heat pump technology. The low-temperature waste heat recovery system is complex, the resistance of the flue gas system is increased, and the investment is high.

[0003] After searching, a coal-fired boiler flue gas waste heat recovery and utilization system disclosed in CN207455616U comprises a boiler body, a flue gas channel and a chimney connected in sequence, and a first heat exchanger, a second heat exchanger, a desulfurization tower, a dust remover and a flue gas reheater are sequentially arranged in the flue gas channel. The system further comprises an evaporation tower, the evaporation tower is provided with a spray pipe and a high-temperature flue gas nozzle, and the high-temperature flue gas nozzle is connected with the flue gas channel through a high-temperature flue gas outlet pipe.

[0004] The above patent mainly realizes the heat exchange of the flue gas through the cooperation of the heat carrier circulating pump and the second heat exchanger. However, the heat exchange mechanism is easy to accumulate a large amount of dust on the heat exchange plate after long-time use, so that the heat exchange efficiency of the heat exchange plate is linearly reduced, and then the heat exchange efficiency of the whole device is affected. Therefore, a waste heat utilization device for desulfurization system is needed to solve such problems. SUMMARY

[0005] (I) Technical problems solved

[0006] The purpose of the present application is to provide a waste heat utilization device for desulfurization system to solve the problem of low heat exchange efficiency of the existing waste heat utilization device in the background art.

[0007] (II) Technical scheme

[0008] In order to achieve the above purpose, the present application provides the following technical scheme: a waste heat utilization device for desulfurization system, comprising a base, a middle cylinder body is fixedly connected to the middle part of the upper end face of the base, a waste gas inlet pipe is fixedly installed on the left end face of the middle cylinder body, a waste gas outlet pipe is fixedly connected to the right end face of the middle cylinder body, and a driving mechanism is further arranged on the front part of the outer side wall of the middle cylinder body;

[0009] The inner cavity of the middle cylinder is fixedly installed with fixed supports on the left and right sides, the inner walls of the fixed supports on the left and right sides are rotationally installed with transmission rods, the side walls of the transmission rods are provided with purification mechanisms, the lower side walls of the inner cavity of the middle cylinder are fixedly installed with heat exchange plates on the front and rear sides, and the inner cavity of the heat exchange plates is provided with a heat exchange mechanism.

[0010] Preferably, the driving mechanism comprises a driving motor fixedly installed on the front side wall of the middle cylinder through a rack and a gear box fixed to the side wall of the middle cylinder through a connecting plate, the inner cavity of the gear box is rotationally installed with a first bevel gear and a second bevel gear, and the second bevel gear is fixedly installed on the side wall of the transmission rod.

[0011] Preferably, the output shaft end of the driving motor is fixedly connected with the first bevel gear through a connecting rod, the first bevel gear is meshingly connected with the second bevel gear, and the transmission rod and the connecting rod are rotationally connected with the gear box.

[0012] Preferably, the purification mechanism comprises guide rods fixedly installed on the side walls of the transmission rods, and lower clamping blocks fixedly installed on the side walls of the guide rods, the side walls of the lower clamping blocks are fixedly installed with positioning blocks, the inner cavities of the positioning blocks are rotationally installed with bidirectional screws, the side walls of the bidirectional screws are threadedly installed with moving seats at both ends, and the side walls of the lower clamping blocks are attached with upper clamping blocks.

[0013] Preferably, the guide rods are annularly and equidistantly provided with three groups on the side walls of the transmission rods, the lower clamping blocks are linearly provided with four groups along the axial center line of the transmission rod, the thread directions of the two ends of the bidirectional screw are opposite, and the two moving seats are fixedly connected with the corresponding lower clamping blocks and upper clamping blocks, respectively.

[0014] Preferably, the upper clamping blocks and the lower clamping blocks are clamped with activated carbon rods, the activated carbon rods are provided with a plurality of groups, the upper clamping blocks and the lower clamping blocks are both obliquely arranged, and the inclined surfaces face the exhaust gas inlet pipe.

[0015] Preferably, the heat exchange mechanism comprises heat exchange coils fixedly installed in the inner cavities of the heat exchange plates, and water tanks fixedly installed on the front and rear sides of the upper end face of the base, a wastewater inlet and outlet pipe is fixedly installed on the right side wall of the water tank, a reciprocating threaded groove rod is further rotationally installed between the fixed supports on the left and right sides, a scraping seat is slidingly installed on the side wall of the reciprocating threaded groove rod, and the reciprocating threaded groove rod is connected with the transmission rod through a belt pulley assembly.

[0016] Preferably, a water pump is arranged on the water tank and communicates with the input end of the heat exchange coil, the output end of the heat exchange coil communicates with the water tank, a limiting peg is slidingly installed in the inner cavity of the threaded groove wall of the reciprocating threaded groove rod, the limiting peg is fixedly installed on the side wall of the scraping seat, the scraping seat is arranged in a circular arc shape, and the scraping seat is attached to the side wall of the heat exchange plate.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1、The user in the present application will enter the waste gas in the desulfurization system into the inner cavity of the intermediate cylinder through the waste gas inlet pipe, and then start the driving motor to drive the connecting rod to rotate the first bevel gear, which will drive the second bevel gear to rotate the transmission rod. At this time, with the continuous rotation of the transmission rod, the lower clamp block fixed on the side wall of the transmission rod also rotates. Since the lower clamp block and the upper clamp block are both inclined, the high-temperature waste gas in the inner cavity of the intermediate cylinder can drive the activated carbon rod arranged in the inner cavity of the lower clamp block and the upper clamp block to rotate at this time. At this time, the contact area of the activated carbon rod with the high-temperature waste gas is significantly increased, effectively improving the efficiency of the entire device for adsorbing and purifying harmful substances in the waste gas.

[0019] 2、The lower clamp block and the upper clamp block can guide the high-temperature waste gas to the side wall of the intermediate cylinder when the lower clamp block and the upper clamp block rotate. Since the front and rear side walls of the intermediate cylinder are both fixedly installed with heat exchange plates, the user can start the water pump to make the clean water in the water tank circulate in the heat exchange coil at this time. With the continuous heat conduction of the heat exchange plates, the entire device can realize the function of recycling the high-temperature heat in the waste gas. The water temperature in the water tank rises continuously, and through the cooperation of the waste water inlet and outlet pipes, the heated circulating water can be delivered to the boiler for use, which can greatly reduce the use cost of low-pressure steam of each boiler deaerator. The saved low-pressure steam helps to increase the waste heat power generation capacity, while reducing the evaporation of circulating water and reducing the consumption of tap water, saving costs. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a front view of the overall structure of the present application.

[0021] Figure 2 It is a sectional view of the present application.

[0022] Figure 3 It is a sectional view of the present application. Figure 3 It is an enlarged structure schematic view of area A in the present application.

[0023] Figure 4 It is a sectional view of the gear box of the present application.

[0024] Figure 5 It is a display structure schematic view of the purification mechanism of the present application.

[0025] Figure 6 It is a sectional view of the scraping seat of the present application.

[0026] In the figure: 1, base; 2, intermediate cylinder; 21, exhaust gas inlet pipe; 22, exhaust gas outlet pipe; 3, driving mechanism; 31, driving motor; 32, gear box; 33, first bevel gear; 34, second bevel gear; 35, connecting rod; 4, fixed support; 5, transmission rod; 6, purification mechanism; 61, guide rod; 62, lower clamping block; 63, positioning block; 64, bidirectional screw; 65, moving seat; 66, upper clamping block; 67, activated carbon rod; 7, heat exchange plate; 8, heat exchange mechanism; 81, heat exchange coil; 82, water tank; 821, wastewater inlet and outlet pipe; 822, water pump; 83, reciprocating screw groove rod; 831, limiting nail; 84, scraping seat; 85, pulley assembly. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. Embodiment one

[0028] Please refer to Figures 1-6 The present application provides a kind of for desulfurization system's waste heat utilization device technical solution: a kind of for desulfurization system's waste heat utilization device, including base 1, base 1 upper end face middle part fixedly connected with intermediate cylinder 2, the left end surface of intermediate cylinder 2 is fixedly installed with exhaust gas inlet pipe 21, the right end surface of intermediate cylinder 2 is fixedly connected with exhaust gas outlet pipe 22, the front of the outer lateral wall of intermediate cylinder 2 is further provided with driving mechanism 3;

[0029] The inner chamber of intermediate cylinder 2 left and right sides is fixedly installed with fixed support 4, and the inner wall between the left and right fixed supports 4 is rotatably installed with transmission rod 5, and the side wall of transmission rod 5 is provided with purification mechanism 6, and the inner chamber of the lower lateral wall of intermediate cylinder 2 is fixedly installed with heat exchange plate 7 on the front and back two sides, and the inner chamber of heat exchange plate 7 is provided with heat exchange mechanism 8.

[0030] Further, driving mechanism 3 includes driving motor 31 fixedly installed on the front of the lateral wall of intermediate cylinder 2 by frame, and gear box 32 fixed to the lateral wall of intermediate cylinder 2 by connecting plate, first bevel gear 33 and second bevel gear 34 are rotatably installed in the inner chamber of gear box 32, and second bevel gear 34 is fixedly installed on the side wall of transmission rod 5;

[0031] The output shaft end of driving motor 31 is fixedly connected with first bevel gear 33 through connecting rod 35, first bevel gear 33 is engagedly connected with second bevel gear 34, and transmission rod 5 and connecting rod 35 are rotatably connected with gear box 32;

[0032] It should be noted that the user will desulfurization system through the exhaust pipe 21 into the inner cavity of the intermediate cylinder 2 after the exhaust gas, synchronous start drive motor 31 makes the connecting rod 35 drive the first bevel gear 33 rotation, because the first bevel gear 33 and the second bevel gear 34 meshing connection, the second bevel gear 34 can drive the transmission rod 5 fixed in its inner cavity rotation, at this time, with the transmission rod 5 constantly rotating, through the guide rod 61 fixed on the side wall of the transmission rod 5 lower clamp block 62 also rotates, because the lower clamp block 62 and the upper clamp block 66 are inclined to set, at this time, through the inner cavity of the intermediate cylinder 2 high temperature exhaust gas can drive the activated carbon rod 67 set in the inner cavity of the lower clamp block 62 and the upper clamp block 66 rotation, at this time, the activated carbon rod 67 and the contact area of high temperature exhaust gas increases significantly, effectively improve the efficiency of the device for the harmful substances in the exhaust gas adsorption and purification.

[0033] The purification mechanism 6 includes a guide rod 61 fixedly installed on the side wall of the transmission rod 5, and a lower clamp block 62 fixedly installed on the side wall of the guide rod 61, the side wall of the lower clamp block 62 is fixedly installed with a positioning block 63, the inner cavity of the positioning block 63 is rotatably installed with a double screw rod 64, the side wall of the double screw rod 64 is threadedly installed with a moving seat 65, and the side wall of the lower clamp block 62 is attached with an upper clamp block 66;

[0034] The guide rod 61 is annularly and equidistantly provided with three groups on the side wall of the transmission rod 5, the lower clamp block 62 is linearly provided with four groups with the axis of the transmission rod 5, the opposite screw threads are threadedly installed at both ends of the double screw rod 64, and the two moving seats 65 are fixedly connected with the corresponding lower clamp block 62 and upper clamp block 66 respectively.

[0035] The activated carbon rod 67 is clamped between the upper clamp block 66 and the lower clamp block 62, the activated carbon rod 67 is provided with a plurality of groups, the upper clamp block 66 and the lower clamp block 62 are inclined to set, and the inclined surfaces face the exhaust pipe 21.

[0036] It should be noted that by rotating the double screw rod 64, the moving seat 65 at one end will drive the upper clamp block 66 to move away from the lower clamp block 62 under the cooperation of the opposite screw threads at both ends of the double screw rod 64, at this time, the distance between the upper clamp block 66 and the lower clamp block 62 is increased, and the user can quickly disassemble and replace the activated carbon rod 67 to ensure the effect of exhaust gas purification of the whole device. Example two

[0037] The heat exchange mechanism 8 includes a heat exchange coil 81 fixedly installed in the inner cavity of the heat exchange plate 7, and a water tank 82 fixedly installed on the front and rear sides of the upper end face of the base 1, a waste water inlet and outlet pipe 821 is fixedly installed on the right side wall of the water tank 82, a reciprocating threaded groove rod 83 is rotatably installed between the two fixed supports 4, a scraping seat 84 is slidably installed on the side wall of the reciprocating threaded groove rod 83, and the reciprocating threaded groove rod 83 is connected with the transmission rod 5 through a belt pulley assembly 85;

[0038] Further, the water tank 82 is provided with a water pump 822 connected with the input end of the heat exchange coil 81, the output end of the heat exchange coil 81 is connected with the water tank 82, the threaded groove wall inner cavity of the reciprocating threaded groove rod 83 is slidingly installed with a limiting pin 831, the limiting pin 831 is fixedly installed on the side wall of the scraping seat 84, the scraping seat 84 is arranged in a circular arc shape, and the scraping seat 84 is attached to the side wall of the heat exchange plate 7.

[0039] It should be noted that when the transmission rod 5 rotates, the reciprocating threaded groove rod 83 can be rotated through the cooperation of the belt pulley assembly 85, at this time, under the cooperation of the limiting pin 831 and the circular arc arrangement of the scraping seat 84, the scraping seat 84 can reciprocatingly move in the inner cavity of the middle cylinder 2, thereby achieving the operation of scraping the smoke dust adhered to the surface of the heat exchange plate 7, avoiding the possibility of reducing the heat transfer efficiency of the heat exchange plate 7 due to the excessive thickness of the smoke dust.

[0040] Working principle:

[0041] After the user puts the waste gas in the desulfurization system into the inner cavity of the middle cylinder 2 through the waste gas inlet pipe 21, the driving motor 31 is started synchronously to drive the connecting rod 35 to rotate the first bevel gear 33, since the first bevel gear 33 is meshed with the second bevel gear 34, the second bevel gear 34 can drive the transmission rod 5 fixed in the inner cavity thereof to rotate at this time, with the continuous rotation of the transmission rod 5, the lower clamp block 62 fixed on the side wall of the transmission rod 5 also rotates, since the lower clamp block 62 and the upper clamp block 66 are both arranged in an inclined manner, the high-temperature waste gas in the inner cavity of the middle cylinder 2 can drive the activated carbon rod 67 arranged in the inner cavities of the lower clamp block 62 and the upper clamp block 66 to rotate at this time, the contact area of the activated carbon rod 67 with the high-temperature waste gas is significantly increased, effectively improving the efficiency of the entire device in adsorbing and purifying harmful substances in the waste gas;

[0042] After the activated carbon rod 67 is used for a period of time, the user rotates the bidirectional screw rod 64, under the cooperation of the opposite threads at both ends of the bidirectional screw rod 64, the moving seat 65 at one end will drive the upper clamp block 66 to continuously move away from the lower clamp block 62, at this time, the distance between the upper clamp block 66 and the lower clamp block 62 is increased, the user can quickly disassemble and replace the activated carbon rod 67 to ensure the effect of the entire device in purifying the waste gas;

[0043] When the lower clamp block 62 and the upper clamp block 66 rotate, the lower clamp block 62 and the upper clamp block 66 can guide the high-temperature waste gas to the side wall of the intermediate cylinder 2. Since the front and rear side walls of the intermediate cylinder 2 are both fixedly installed with the heat exchange plates 7, when the user starts the water pump 822, the fresh water in the water tank 82 can flow in the heat exchange coil 81. At this time, cooperating with the continuous heat conduction of the heat exchange plates 7, the entire device can realize the function of recycling the high-temperature heat in the waste gas. At this time, the water temperature in the water tank 82 rises continuously. Through the cooperation of the waste water inlet and outlet pipe 821, the heated circulating water can be delivered to the boiler for use, which can greatly reduce the use cost of low-pressure steam of each boiler deaerator. The saved low-pressure steam helps to increase the waste heat power generation capacity, and at the same time, it can reduce the evaporation of circulating water and reduce the consumption of tap water, saving the cost.

[0044] When the transmission rod 5 rotates, through the cooperation of the belt pulley assembly 85, the reciprocating screw groove rod 83 can rotate. At this time, under the cooperation of the limiting nails 831 and the arc-shaped arrangement of the scraping seat 84, the scraping seat 84 can reciprocate in the inner cavity of the intermediate cylinder 2, realizing the operation of scraping the smoke dust adhered to the surface of the heat exchange plate 7, avoiding the possibility that the heat transfer efficiency of the heat exchange plate 7 is reduced due to the excessive thickness of the smoke dust, and further improving the heat exchange effect of the entire device.

[0045] Finally, it should be noted that the above content is only used to illustrate the technical solutions of the present application, and is not a limitation on the protection scope of the present application. Simple modifications or equivalent replacements of the technical solutions of the present application made by ordinary skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.

Claims

1. A waste heat utilization device for a desulfurization system, comprising a base (1), characterized in that, The middle part of the upper end face of the base (1) is fixedly connected with an intermediate cylinder (2), the left end face of the intermediate cylinder (2) is fixedly installed with a waste gas inlet pipe (21), the right end face of the intermediate cylinder (2) is fixedly connected with a waste gas outlet pipe (22), and the front part of the outer lateral wall of the intermediate cylinder (2) is further provided with a driving mechanism (3). The inner cavities of the left and right sides of the intermediate cylinder (2) are fixedly installed with fixed supports (4), the inner walls of the left and right fixed supports (4) are rotatably installed with a transmission rod (5), and the lateral wall of the transmission rod (5) is provided with a purification mechanism (6). The purification mechanism (6) comprises a guide rod (61) fixedly installed on the lateral wall of the transmission rod (5), a lower clamping block (62) fixedly installed on the lateral wall of the guide rod (61), a positioning block (63) fixedly installed on the lateral wall of the lower clamping block (62), a double-way screw rod (64) rotatably installed in the inner cavity of the positioning block (63), and a moving seat (65) threadedly installed at the two ends of the lateral wall of the double-way screw rod (64). The guide rod (61) is annularly and equidistantly provided with three groups on the lateral wall of the transmission rod (5), the lower clamping block (62) is linearly provided with four groups along the axis of the transmission rod (5), the thread directions of the two ends of the double-way screw rod (64) are opposite, and the two moving seats (65) are fixedly connected with the corresponding lower clamping block (62) and upper clamping block (66), respectively. The active carbon rods (67) are clamped between the upper clamping block (66) and the lower clamping block (62), the active carbon rods (67) are provided with several groups, and the upper clamping block (66) and the lower clamping block (62) are both provided in an inclined manner, and the inclined surfaces thereof face the waste gas inlet pipe (21). The inner cavities of the front and rear sides of the lower lateral wall of the intermediate cylinder (2) are fixedly installed with heat exchange plates (7), and the inner cavities of the heat exchange plates (7) are provided with heat exchange mechanisms (8).

2. A waste heat utilization device for a desulphurization system according to claim 1, characterized in that: The driving mechanism (3) comprises a driving motor (31) fixedly installed on the front part of the lateral wall of the intermediate cylinder (2) through a rack, a gear box (32) fixed to the lateral wall of the intermediate cylinder (2) through a connecting plate, a first bevel gear (33) and a second bevel gear (34) rotatably installed in the inner cavity of the gear box (32), and the second bevel gear (34) fixedly installed on the lateral wall of the transmission rod (5).

3. A waste heat utilization device for a desulphurization system according to claim 2, characterized in that: The output shaft end of the driving motor (31) is fixedly connected with the first bevel gear (33) through a connecting rod (35), the first bevel gear (33) is meshingly connected with the second bevel gear (34), and the transmission rod (5) and the connecting rod (35) are both rotatably connected with the gear box (32).

4. A waste heat utilization device for a desulphurization system according to claim 1, characterized in that: The heat exchange mechanism (8) comprises a heat exchange coil (81) fixedly installed in the inner cavity of the heat exchange plate (7), and a water tank (82) fixedly installed on the front and back sides of the upper end face of the base (1), a waste water inlet and outlet pipe (821) is fixedly installed on the right side wall of the water tank (82), a reciprocating screw groove rod (83) is further rotatably installed between the two fixed supports (4), a scraping seat (84) is slidably installed on the side wall of the reciprocating screw groove rod (83), and the reciprocating screw groove rod (83) is connected with the transmission rod (5) through a belt pulley assembly (85).

5. A waste heat utilization device for a desulphurization system according to claim 4, characterized in that: A water pump (822) is arranged on the water tank (82) and communicates with the input end of the heat exchange coil (81), the output end of the heat exchange coil (81) communicates with the water tank (82), a limiting pin (831) is slidably installed in the inner cavity of the screw groove wall of the reciprocating screw groove rod (83), the limiting pin (831) is fixedly installed on the side wall of the scraping seat (84), the scraping seat (84) is arranged in a circular arc shape, and the scraping seat (84) is attached to the side wall of the heat exchange plate (7).

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