Exhaust gas temperature adjusting device of heating furnace

Abstract

The utility model relates to the technical field of equipment, and discloses a heating furnace exhaust gas temperature adjusting device which comprises an adjusting shell arranged between a furnace body assembly and a chimney, a first adjusting chamber and a second adjusting chamber are symmetrically arranged in the adjusting shell, the first adjusting chamber is provided with a plurality of gas guide pipes at intervals in the smoke exhaust direction, and the second adjusting chamber is provided with a plurality of gas guide pipes. The upper end and the lower end of the second adjusting chamber are provided with opposite smoke exhaust ports, and a plurality of heat exchange pipes are arranged between the two smoke exhaust ports. Through the arrangement of the sealing part, the first adjusting chamber and the second adjusting chamber, the first adjusting chamber or the second adjusting chamber can be selected to be sealed according to the temperature difference between the temperature of the flue gas exhausted from the furnace body assembly and the temperature of the flue gas meeting the emission standard, and the circulation path of the flue gas is controlled so as to adapt to temperature adjustment of different temperature differences.

Description

TECHNICAL FIELD

[0001] The utility model relates to heating furnace equipment technical field especially relates to a heating furnace exhaust temperature adjusting device. BACKGROUND

[0002] At present, oilfield oil production gathering and transportation heating mainly uses natural gas heating furnace, due to the heating furnace load does not reach the normal load range, the exhaust temperature of the heating furnace and the air coefficient are at an unreasonable level, which will cause the heating furnace combustion flue gas NOx emission not up to standard and natural gas waste. Excessive O2 coefficient affects the emission characteristics of nitrogen oxides of gaseous fuel, with the increase of oxygen content, the NOX emission in the furnace increases, when the excess O2 coefficient increases to a certain value, the NOX emission decreases. Field investigation shows that the heating furnace flue damper is not easy to adjust, and the exhaust heat loss is large.

[0003] The Chinese utility model patent with patent No. CN216897861U discloses a heating furnace exhaust temperature control device, the heating furnace exhaust temperature control device includes a flue gas monitoring short section, a programmable controller, an adjusting mechanism, a baffle and an adjusting shaft, the flue gas monitoring short section is located above the chimney seat, the baffle and the adjusting shaft are located in the flue gas monitoring short section, the adjusting shaft is connected to the baffle, the adjusting mechanism is connected to the adjusting shaft to control the opening degree of the baffle, the programmable controller is connected to the adjusting mechanism, according to the heating demand and the flue gas index requirement, the opening degree of the baffle is set.

[0004] The above patent has at least the following problems: controlling the flue gas flow rate by controlling the baffle will greatly affect the flue gas emission efficiency, and cannot flexibly select the temperature adjusting mode according to the difference between the actual temperature and the emission specified temperature, and the practicality is poor. UTILITY MODEL CONTENTS

[0005] The utility model discloses a heating furnace exhaust temperature adjusting device in view of the deficiency of prior art.

[0006] The technical scheme for solving the technical problem of the utility model is as follows: a heating furnace exhaust temperature adjusting device, including the adjusting shell that is arranged between the furnace body assembly and the chimney, the first adjusting chamber and the second adjusting chamber are symmetrically arranged in the adjusting shell, a plurality of gas guide pipes are arranged in the first adjusting chamber along the exhaust direction, the upper end and the lower end of the second adjusting chamber are provided with oppositely arranged exhaust openings, a plurality of heat exchange pipes are arranged between the two exhaust openings, the heat exchange pipes and the first adjusting chamber can be filled with circulating heat exchange medium, the adjusting shell is provided with a sealing part, and the sealing part rotates to seal the first adjusting chamber or the second adjusting chamber.

[0007] As optimization, the first adjusting chamber is provided with a cavity, the first adjusting chamber side wall is provided with a first liquid inlet pipe and a first liquid outlet pipe penetrating into the cavity, and a booster pump is arranged on the first liquid inlet pipe or the first liquid outlet pipe.

[0008] As optimization, the two ends of the heat exchange pipes are connected with the second liquid inlet pipe and the second liquid outlet pipe respectively, the heat exchange pipes are in S shape, and a booster pump is arranged on the second liquid inlet pipe or the second liquid outlet pipe.

[0009] As optimization, the sealing part comprises a baffle, the baffle is provided with a hollow area for communicating with the first adjusting chamber or the second adjusting chamber, and the adjusting housing is provided with a driving mechanism for driving the baffle to rotate.

[0010] As optimization, the driving mechanism comprises a driving motor, and an output shaft of the driving motor is fixedly connected with the shaft of the baffle.

[0011] As optimization, the side wall of the baffle is provided with a ring edge.

[0012] As optimization, temperature sensors are arranged in the upper and lower ends of the adjusting housing.

[0013] As optimization, the furnace body assembly comprises a heating furnace body and a convection bin, the convection bin is located above the heating furnace body, and the adjusting housing is located above the convection bin.

[0014] As optimization, the sum of the sectional areas of the gas guide pipes is not less than the sectional area of the chimney, and the smoke exhaust opening area of the second adjusting chamber is not less than the sectional area of the chimney.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] Firstly, the first adjusting chamber or the second adjusting chamber can be sealed according to the temperature difference between the flue gas temperature discharged from the furnace body assembly and the flue gas temperature meeting the emission standard, so as to adapt to temperature adjustment of different temperature differences.

[0017] When the temperature difference between the flue gas temperature discharged from the furnace body assembly and the flue gas temperature meeting the emission standard is large, efficient cooling of the flue gas is needed, at this time, the second adjusting chamber is sealed by the sealing part, so that the flue gas discharged from the furnace body assembly flows from the gas guide pipe in the first adjusting chamber to the chimney, at the same time, the heat exchange medium is introduced into the first adjusting chamber, the heat exchange medium cools and cools the flue gas flowing through the gas guide pipe, the arrangement of the plurality of gas guide pipes can make the flue gas and the gas guide pipe fully exchange heat, and the gas guide pipe is preferably a copper pipe, so as to increase the heat exchange efficiency and the structural strength.

[0018] When the temperature difference between the flue gas temperature discharged from the furnace body assembly and the flue gas temperature meeting the emission standard is small, small-scale adjustment is needed for the flue gas temperature, at this time, the first adjusting chamber is sealed by the sealing part, the flue gas discharged from the furnace body assembly flows into the chimney after flowing through the second adjusting chamber, the flue gas flowing through the second adjusting chamber is in contact with the heat exchange pipe to exchange heat, and the flue gas temperature flowing through the second adjusting chamber is adjusted in a small-scale range. Both adjustment modes will not affect the flow rate of the flue gas, and the efficiency of flue gas emission is ensured.

[0019] Secondly, the first liquid inlet pipe, the first liquid outlet pipe, the second liquid inlet pipe and the second liquid outlet pipe are arranged, so that the external circulating equipment is connected to make the heat exchange medium circulate, the heat exchange efficiency is further increased, the heat absorbed by the heat exchange medium can be transmitted for heat recovery, the thermal efficiency of the heating furnace is increased, and the flow rate of the heat exchange medium in the heat exchange pipe and the first adjusting chamber is controlled by changing the power of the pump, so that the heat exchange efficiency of the heat exchange medium is optimized.

[0020] Thirdly, the temperature difference between the flue gas entering the adjusting shell and the flue gas discharged from the adjusting shell can be detected by the temperature sensors arranged at the upper end and the lower end of the adjusting shell, so that the flow rate of the heat exchange medium can be flexibly controlled by the staff according to the difference, and the size of the flue gas discharge temperature can be grasped.

[0021] Fourthly, high-temperature flue gas is generated when the combustion medium in the heating furnace body burns, the flue gas enters the convection bin for primary heat exchange, the heat exchange medium circulates in the convection bin, the flue gas flowing through the convection bin is heat-recovered, when the flue gas temperature flowing out of the convection bin is higher than the specified flue gas emission temperature, the sealing part flexibly selects the flow path of the flue gas according to the difference between the actual flue gas temperature and the specified temperature, and temperature control in different temperature difference ranges is completed.

[0022] Fifthly, the sum of the cross-sectional areas of the plurality of air guide pipes is greater than the cross-sectional area of the chimney, and the smoke outlet area of the second adjusting chamber is greater than the cross-sectional area of the chimney. This design can avoid the increase of the flow rate of the flue gas flowing into the chimney from the adjusting shell, so that the flue gas is quickly discharged from the chimney. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is an assembly position schematic view of the adjusting shell in an embodiment of the utility model.

[0024] Figure 2 It is an internal structure schematic view of the adjusting shell in an embodiment of the utility model.

[0025] Figure 3 It is a structure schematic view of the sealing part in an embodiment of the utility model.

[0026] In the figure: 1, heating furnace body; 2, convection bin; 3, adjusting shell; 31, first adjusting chamber; 311, air guide pipe; 312, first liquid inlet pipe; 313, first liquid outlet pipe; 32, second adjusting chamber; 321, heat exchange pipe; 322, second liquid inlet pipe; 323, second liquid outlet pipe; 4, chimney; 5, baffle; 51, hollow area; 52, ring edge; 6, driving motor; 61, output shaft; 7, temperature sensor. DETAILED DESCRIPTION

[0027] In order to clearly illustrate the technical features of the scheme, the utility model is described in detail below through specific embodiments, and in conjunction with the drawings thereof.

[0028] Embodiment 1

[0029] Figures 1 to 3 For an embodiment of the utility model, as shown in the figure, Figures 1 to 3 A heating furnace exhaust temperature adjusting device, comprising an adjusting shell 3 arranged between the furnace body assembly and the chimney 4, a first adjusting chamber 31 and a second adjusting chamber 32 are symmetrically arranged in the adjusting shell 3, a plurality of air guide pipes 311 are arranged in the first adjusting chamber 31 along the exhaust direction, the second adjusting chamber 32 has oppositely arranged exhaust ports at the upper and lower ends, a plurality of heat exchange pipes 321 are arranged between the two exhaust ports, the heat exchange pipes 321 and the first adjusting chamber 31 can both pass through the circulating heat exchange medium, the adjusting shell 3 is provided with a sealing part, and the sealing part is rotated to seal the first adjusting chamber 31 or the second adjusting chamber 32.

[0030] As shown in the figure, Figure 2 The first adjusting chamber 31 is provided with a cavity, the first adjusting chamber 31 is provided with a first liquid inlet pipe 312 and a first liquid outlet pipe 313 penetrating into the cavity, and a booster pump is arranged on the first liquid inlet pipe 312 or the first liquid outlet pipe 313. The two ends of the plurality of heat exchange pipes 321 are connected with the second liquid inlet pipe 322 and the second liquid outlet pipe 323 respectively, the heat exchange pipes 321 are in S shape, and a booster pump is arranged on the second liquid inlet pipe 322 or the second liquid outlet pipe 323. By arranging the first liquid inlet pipe 312, the first liquid outlet pipe 313, the second liquid inlet pipe 322 and the second liquid outlet pipe 323, the circulating equipment outside can be connected to make the heat exchange medium circulate, the heat exchange efficiency is further increased, the heat absorbed by the heat exchange medium can be transmitted out for heat recovery, the thermal efficiency of the heating furnace is increased, and the flow rate of the heat exchange medium in the heat exchange pipe 321 and the cavity of the first adjusting chamber 31 can be controlled by changing the power of the pump, thereby optimizing the heat exchange efficiency of the heat exchange medium.

[0031] As shown in the figure, Figure 2 and Figure 3As shown, the sealing part comprises a baffle 5, the baffle 5 is provided with a hollow area 51 for communicating the first adjusting chamber 31 or the second adjusting chamber 32, and the adjusting housing 3 is provided with a driving mechanism for driving the baffle 5 to rotate. Specifically, the driving mechanism comprises a driving motor 6, and the output shaft 61 of the driving motor 6 is fixedly connected with the shaft center of the baffle 5.

[0032] As shown in Figure 3 , the side wall of the baffle 5 is provided with a ring edge 52, which can strengthen the structure of the baffle 5, and also increase the contact area between the baffle 5 and the side edge and the inner wall of the adjusting housing 3, and increase the air tightness between the baffle 5 and the inner wall of the adjusting housing 3.

[0033] As shown in Figure 1 and Figure 2 , the adjusting housing 3 is provided with temperature sensors 7 at the upper and lower ends, and the temperature sensors 7 at the upper and lower ends of the adjusting housing 3 can detect the temperature difference between the flue gas entering the adjusting housing 3 and the flue gas discharged from the adjusting housing 3, so as to facilitate the operator to flexibly control the flow rate of the heat exchange medium according to the difference, and master the size of the flue gas discharge temperature.

[0034] As shown in Figure 1 , the furnace body assembly comprises a heating furnace body 1 and a convection bin 2, the convection bin 2 is located above the heating furnace body 1, and the adjusting housing 3 is located above the convection bin 2. The high-temperature flue gas is generated when the combustion medium in the heating furnace body 1 is burned, and the flue gas enters the convection bin 2 for primary heat exchange. The convection bin 2 is provided with a circulating heat exchange medium, and the flue gas flowing through the convection bin 2 is heat recovered. When the temperature of the flue gas flowing out of the convection bin 2 is higher than the specified flue gas discharge temperature, the sealing part flexibly selects the flow path of the flue gas according to the difference between the actual temperature of the flue gas and the specified temperature, and completes the temperature control in different temperature difference ranges.

[0035] As shown in Figure 2 , the sum of the cross-sectional areas of the plurality of gas guide pipes 311 is greater than the cross-sectional area of the chimney 4, and the smoke exhaust opening area of the second adjusting chamber 32 is greater than the cross-sectional area of the chimney 4. This design can avoid the increase of the flue gas flow rate flowing into the chimney 4 from the adjusting housing 3, so that the flue gas can be quickly discharged from the chimney 4.

[0036] In use, the flue gas generated by combustion inside the furnace body assembly is discharged to the outside from the chimney 4 after passing through the adjusting housing 3, and the sealing part can select to seal the first adjusting chamber 31 or the second adjusting chamber 32 according to the temperature difference between the flue gas temperature discharged from the furnace body assembly and the flue gas temperature meeting the emission standard, so as to adapt to temperature adjustment of different temperature differences. Specifically, when the temperature difference between the flue gas temperature discharged from the furnace body assembly and the flue gas temperature meeting the emission standard is large, for example, the temperature difference is 100-150 degrees Celsius, efficient cooling of the flue gas is required, at this time, the second adjusting chamber 32 is sealed by the sealing part, so that the flue gas discharged from the furnace body assembly flows from the gas guide pipe 311 in the first adjusting chamber 31 to the chimney 4, and at the same time, the heat exchange medium such as heat conducting oil, water, etc. is introduced into the cavity of the first adjusting chamber 31, and the heat exchange medium cools and reduces the temperature of the flue gas flowing through the gas guide pipe 311. The arrangement of the plurality of gas guide pipes 311 can make the flue gas passing through the gas guide pipes 311 fully exchange heat with the gas guide pipes 311, and the gas guide pipes 311 are preferably copper pipes to increase the heat exchange efficiency and structural strength.

[0037] In the utility model, the description of the orientation or relative position relation of structure, such as the orientation or relative position relation indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer" and the like, is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated structure must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

Claims

1. A heating grate smoke temperature regulating device, characterized by: The adjusting shell (3) is provided between the furnace body assembly and the chimney (4), the first adjusting chamber (31) and the second adjusting chamber (32) are symmetrically arranged in the adjusting shell (3), the first adjusting chamber (31) is provided with a plurality of air guide pipes (311) in the smoke exhaust direction, the second adjusting chamber (32) is provided with a plurality of heat exchange pipes (321) between the upper and lower smoke exhaust openings, the heat exchange pipes (321) and the first adjusting chamber (31) can be connected with the circulating heat exchange medium, the adjusting shell (3) is provided with a sealing part, and the sealing part is rotated to seal the first adjusting chamber (31) or the second adjusting chamber (32).

2. The heating grate smoke temperature regulating device according to claim 1, characterized in that: The first adjusting chamber (31) is provided with a cavity, the side wall of the first adjusting chamber (31) is provided with a first liquid inlet pipe (312) and a first liquid outlet pipe (313) penetrating into the cavity, and the first liquid inlet pipe (312) or the first liquid outlet pipe (313) is provided with a booster pump.

3. The heating grate smoke temperature regulating device of claim 2, wherein: The two ends of the plurality of heat exchange pipes (321) are connected with the second liquid inlet pipe (322) and the second liquid outlet pipe (323), the heat exchange pipes (321) are in S shape, and the second liquid inlet pipe (322) or the second liquid outlet pipe (323) is provided with a booster pump.

4. The heating grate smoke temperature regulating device of claim 1, wherein: The sealing part comprises a baffle (5), the baffle (5) is provided with a hollow area (51) for connecting the first adjusting chamber (31) or the second adjusting chamber (32), and the adjusting shell (3) is provided with a driving mechanism for driving the baffle (5) to rotate.

5. The heating grate smoke temperature regulating device of claim 4, wherein: The driving mechanism comprises a driving motor (6), and the output shaft (61) of the driving motor (6) is fixedly connected with the shaft of the baffle (5).

6. The heating grate smoke temperature regulating device of claim 5, wherein: The side wall of the baffle (5) is provided with a ring edge (52).

7. The heating grate smoke temperature regulating device of claim 1, wherein: The temperature sensor (7) is arranged in the upper and lower ends of the adjusting shell (3).

8. The flue gas temperature adjusting device for a heating furnace according to any one of claims 1 to 7, characterized by: The furnace body assembly comprises a heating furnace body (1) and a convection bin (2), the convection bin (2) is located above the heating furnace body (1), and the adjusting shell (3) is located above the convection bin (2).

9. The flue gas temperature adjusting device according to any one of claims 1 to 7, characterized by: The sum of the sectional areas of the plurality of air guide pipes (311) is not less than the sectional area of the chimney (4), and the smoke exhaust opening area of the second adjusting chamber (32) is not less than the sectional area of the chimney (4).

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