Efficient gypsum board drying machine

Abstract

The utility model belongs to the technical field of drying machines, and particularly relates to an efficient gypsum board drying machine which comprises a drying body and a plurality of drying air sets, gypsum boards are conveyed from one end of the drying body to the other end of the drying body, the drying air sets are sequentially arranged in the length direction of the drying body, and each drying air set is connected with a residual hot air replacement assembly. The drying air set comprises a circulating air duct, a steam heat exchanger, a combustor and a circulating fan, the steam heat exchanger, the combustor and the circulating fan are sequentially connected to the circulating air duct, the two ends of the circulating air duct are the air outlet end and the air return end respectively, and the air outlet end and the air return end are connected to the drying body at intervals. The steam heat exchanger is arranged in the drying air set, steam serves as a main heat source, the combustor is further arranged, natural gas serves as an auxiliary heat source, energy consumption is lower, cost is low, drying gas is heated through the combustor, the defect that the temperature is not high enough is overcome, and the high-temperature drying gas is heated again through the combustor, so that energy is saved. Excessive natural gas resources are not needed, and the stability of energy is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of drying machine, specifically relates to a high -efficient gypsum board drying machine. BACKGROUND

[0002] With the growth of national economy, people's demand for indoor decoration gypsum board, partition, various gypsum board products expands unceasingly, thereby drives the gypsum board industry to develop rapidly, and the current international and domestic market demands high -efficient, multi -variety, high -quality gypsum board production machine unceasingly increases. At present, the energy of the gypsum board drying machine used by most gypsum board factories at home and abroad is steam, natural gas, electricity, coal or oil, but the temperature of pure steam is not high enough, and high -efficient drying of gypsum board cannot be realized, and the cost of electricity is too high, and the gypsum board production enterprise is difficult to accept, and because of the implementation of environmental protection policy, coal and oil are gradually eliminated.

[0003] The Chinese invention patent with the application number CN201910261758.3 discloses a paper-faced gypsum board drying device with a heat source of natural gas, which comprises a plurality of drying zones connected in sequence, a drying machine is arranged in the drying zone, a distribution air chamber and a conveying roller are arranged in the drying machine, the conveying roller sequentially passes through the distribution air chamber of different drying zones, a distribution air shutter for distributing heat to the roller space is arranged in the distribution air chamber; the distribution air chamber is connected with a combustion chamber, a circulating fan is arranged in the combustion chamber; a burner is further arranged in the combustion chamber, a gas inlet pipeline and an air inlet pipeline are arranged on the combustion chamber, the air inlet pipeline is connected with the circulating fan, and the gas inlet pipeline and the air inlet pipeline are both provided with an inlet shutter; a chimney is further arranged on the drying machine, and the drying process comprises the following steps: S100, upper roller; S200, sequential drying; S300, tail gas treatment; S400, lower roller. It uses natural gas combustion to generate heat for paper-faced gypsum board drying, which simplifies the production process and reduces pollution compared with coal-fired plant equipment, but uses natural gas to heat the air throughout the process, and a large amount of natural gas is needed, and natural gas cannot be used as a stable resource to maintain production in areas where natural gas resources are insufficient. UTILITARIAN CONTENT

[0004] The utility model aims at overcoming the insufficient prior art, and provides a high -efficient gypsum board drying machine, which has high drying efficiency and low energy consumption.

[0005] The utility model discloses a technical scheme that an efficient gypsum board drying machine is adopted to realize the above-mentioned purpose, which comprises a drying main body and drying air groups, the gypsum board is conveyed from one end to the other end of the drying main body, a plurality of drying air groups are sequentially arranged along the length direction of the drying main body, and each drying air group is connected with a waste heat air replacement assembly.

[0006] Preferably, the circulating air duct comprises an air return duct and an air outlet duct, the steam heat exchanger, the burner and the circulating fan are sequentially connected between the air return duct and the air outlet duct, a plurality of ovens are sequentially arranged on the drying main body along the length direction, and the ends of the air return duct and the air outlet duct are connected to adjacent two ovens respectively.

[0007] Preferably, the steam heat exchanger, the burner and the circulating fan of the first drying air group close to one end of the drying main body are sequentially arranged from the end close to the drying main body to the end far from the drying main body, the air outlet end of the circulating air duct is arranged far from the end of the drying main body, and the air return end of the circulating air duct is arranged close to the end of the drying main body; the steam heat exchanger, the burner and the circulating fan of the remaining drying air groups are sequentially arranged from the end far from the drying main body to the end close to the drying main body.

[0008] Preferably, the waste heat air replacement assembly comprises a waste heat exchanger, a waste heat exchange pipe, a suction pipe, a supplementary air pipe and an exhaust pipe, one end of the waste heat exchange pipe is connected to the circulating air duct close to the air return end, the other end of the waste heat exchange pipe is connected to the air inlet end of the waste heat exchanger, one end of the suction pipe is connected to the atmosphere, and the other end of the suction pipe is also connected to the air inlet end of the waste heat exchanger; one end of the supplementary air pipe is connected to the air outlet end after heat exchange of the suction pipe, the other end of the supplementary air pipe is connected to the circulating air duct close to the air outlet end, and one end of the exhaust pipe is connected to the air outlet end after heat exchange of the waste heat exchange pipe.

[0009] Preferably, each drying air group is connected with a waste heat air replacement assembly, one end of the waste heat exchange pipe is connected to the circulating air duct of at least two drying air groups close to one end of the drying main body, and the other end of the supplementary air pipe is connected to the circulating air duct of each drying air group.

[0010] Preferably, the other end of the exhaust pipe is connected with a heat exchange fan, and the air outlet end of the heat exchange fan is connected to a chimney.

[0011] Preferably, a preheating area is arranged on the front side of one end of the drying main body, and the preheating area is connected with an air supply assembly.

[0012] Preferably, the air supply assembly comprises a waste heat recovery pipe, one end of the waste heat recovery pipe is connected with the drying air group close to the other end of the drying main body, one end of the waste heat recovery pipe is connected at the circulating air duct close to the air outlet end, and the other end of the waste heat recovery pipe is connected at the preheating area.

[0013] Preferably, the preheating area is connected with a preheating air outlet pipe, the air outlet end of the preheating air outlet pipe is connected with a preheating fan, and the air outlet end of the preheating fan is connected with a chimney.

[0014] Compared with the prior art, the above technical scheme has the following beneficial effects:

[0015] 1、The utility model discloses a plurality of drying air groups are arranged along the length direction of the drying main body, and the drying air groups convey hot air into the drying main body, and the gypsum board is conveyed from one end of the drying main body to the other end, and is dried by each drying air group in turn in the conveying process, and the drying air group of the utility model is provided with a steam heat exchanger, the steam heat exchanger is used as a main heat source, and a burner is also arranged, and natural gas is used as an auxiliary heat source, so that energy consumption is lower, cost is low, and the drying gas is heated by the burner to make up for the defect that the drying gas temperature after passing through the steam heat exchanger is not high enough to efficiently dry the gypsum board, but the utility model heats the high-temperature drying gas from the steam heat exchanger by the burner again instead of directly heating the drying gas by the burner, so that excessive natural gas resources are not needed, and the stability of the energy source of the gypsum board drying machine is effectively ensured in the region where the natural gas resources are insufficient.

[0016] 2、The circulating fan heats the drying gas in the circulating air duct into high-temperature drying gas by the steam heat exchanger, the high-temperature drying gas is heated to the required temperature by the burner again, and is then conveyed to the drying main body for drying the gypsum board, but the water content in the drying gas increases in the drying process, so the waste heat air replacement assembly is needed to replace the drying gas with high water content, so as to ensure the drying efficiency.

[0017] 3、Part of the dried drying gas is extracted into the waste heat heat exchanger, and the drying air sucked from the outside is preheated by heat exchange with the waste heat drying gas, and then the drying air is supplemented into the circulating air duct, so as to reduce the water content in the drying gas.

[0018] 4、The preheating area is arranged on the front side of the drying main body, the drying gypsum board is heated at low heat in the preheating area first, and the gypsum board is prevented from directly entering the drying main body to cause dry cracking, and the preheating air of the preheating area directly uses the air dried by the last drying air group, the water content of the air dried by the previous drying air groups is the highest, and the water content of the air dried by the last drying air group is very low, so the last drying air group does not need to be replaced, but since part of the air is conveyed to the preheating area, the last drying air group still needs to be connected to the air conveyed after replacement.

[0019] 5. In order to prevent gypsum board from drying and cracking, the steam heat exchanger, the burner and the circulating fan of the first group of drying air groups are sequentially arranged from the end close to the drying main body to the end far from the drying main body, the air outlet end of the circulating air duct is arranged far from the end of the drying air group, and the air return end of the circulating air duct is arranged close to the end of the drying air group, so that the temperature of the drying gas contacted by the gypsum board gradually rises. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the utility model.

[0021] Figure 2 It is a schematic view of the drying air group (the arrow shows the hot air flow direction).

[0022] Wherein: 1, drying main body 2, circulating air duct 201, air return duct 202, air outlet duct 3, steam heat exchanger 4, burner 5, circulating fan 6, waste heat exchanger 7, oven 8, preheating zone 9, waste heat recovery pipe 10, waste heat exchange pipe 11, air supplement pipe 12, air suction pipe 13, preheating air outlet pipe 14, preheating fan 15, chimney 16, heat exchange fan 17, air inlet pipe 18, natural gas pipe. DETAILED DESCRIPTION

[0023] Figures 1-2 It is the best embodiment of the utility model, and the following will be combined with the accompanying drawings to further illustrate the utility model. Figures 1-2 The utility model is further illustrated.

[0024] As shown in the drawings, the utility model discloses a high-efficiency gypsum board drying machine, which comprises a drying main body 1 and a drying air group. Figure 1 The gypsum board is conveyed from one end of the drying main body 1 to the other end, and is dried in the conveying process of the drying main body 1. A plurality of drying air groups are sequentially arranged along the length direction of the drying main body 1, the drying air group conveys hot air to the drying main body 1, the hot air dries the gypsum board, but the temperature of the hot air after drying the gypsum board is very high, which will affect the drying effect of the gypsum board, therefore, the drying air group is connected with a waste heat air replacement assembly, the waste heat air replacement assembly replaces the air with high water content with the drying air, so as to reduce the water content of the hot air for drying the gypsum board.

[0025] As shown in the drawings, the utility model discloses a high-efficiency gypsum board drying machine, which comprises a drying main body 1 and a drying air group. Figure 2As shown, the drying air group comprises a circulating air duct 2, and a steam heat exchanger 3, a burner 4, and a circulating fan 5 connected in sequence on the circulating air duct 2. The two ends of the circulating air duct 2 are an air outlet end and an air return end, which are connected on the drying main body 1 in a spaced manner. The drying air first passes through the steam heat exchanger 3 to be heated into high-temperature drying gas, which contains air and steam. The drying gas is combusted by the burner 4 to have a temperature sufficient to dry the gypsum board. The drying air is then delivered to the drying main body 1 by the circulating fan 5 through the circulating air duct 2. Then, the drying air follows the length direction of the drying main body 1 and returns to the drying air group through the air return end of the circulating air duct 2 to be heated again and then delivered to the drying main body 1. The burner 4 is connected with a natural gas pipe 18 and an air inlet pipe 17.

[0026] In this embodiment, three groups of drying air groups are provided, which are arranged along the length direction of the drying main body 1. The circulating air duct 2 comprises an air return duct 201 and an air outlet duct 202. The steam heat exchanger 3, the burner 4, and the circulating fan 5 are connected in sequence between the air return duct 201 and the air outlet duct 202. A plurality of ovens 7 are arranged in a spaced manner along the length direction of the drying main body 1. The ends of the air return duct 201 and the air outlet duct 202 are connected to adjacent two ovens 7. The air return duct 201 is connected to the steam heat exchanger 3. The steam heat exchanger 3 is connected to the burner 4. The burner 4 is connected to the air inlet of the circulating fan 5. The air outlet of the circulating fan 5 enters the air outlet duct 202. Finally, the air outlet of the air outlet duct 202 enters the oven 7. The oven 7 is open on both sides. The gypsum board passes between the ovens 7. Due to the continuous operation of the circulating fan 5, the air return duct 201 recovers the hot air in the drying main body 1, reheats and recirculates the drying gypsum board. The gypsum board is delivered along the drying main body 1 and is dried by the three groups of drying air groups in sequence.

[0027] The gypsum board is easy to dry crack when directly entering the high-temperature hot air zone. Therefore, the steam heat exchanger 3, the burner 4, and the circulating fan 5 of the first group of drying air groups close to one end of the drying main body 1 are arranged in sequence from close to one end of the drying main body 1 to far from one end of the drying main body 1. The air outlet duct 202 of the circulating air duct 2 is arranged far from one end of the drying main body 1. The air return duct 201 of the circulating air duct 2 is arranged close to one end of the drying main body 1. The hottest hot air first enters the drying main body 1 from the end far from the drying main body 1. The air return duct 201 is connected to a section of the drying main body 1. Therefore, the gypsum board first contacts the residual hot air in the drying main body 1 when entering the drying main body 1, and the temperature is not high, which avoids dry cracking of the gypsum board. The steam heat exchanger 3, the burner 4, and the circulating fan 5 of the remaining drying air groups are arranged in sequence from the end far from the drying main body 1 to the end close to the drying main body 1. The temperature of the gypsum board has been raised after drying by the first group of drying air groups. Therefore, the gypsum board can directly contact the drying hot air.

[0028] The waste heat replacement assembly comprises a waste heat exchanger 6, a waste heat exchange pipe 10, a suction pipe 12, a make-up air pipe 11 and an exhaust pipe. One end of the waste heat exchange pipe 10 is connected to the return air duct 201, the other end of the waste heat exchange pipe 10 is connected to the air inlet end of the waste heat exchanger 6, one end of the suction pipe 12 is connected to the atmosphere, the other end of the suction pipe 12 is connected to the other air inlet end of the waste heat exchanger 6; one end of the make-up air pipe 11 is connected to the air outlet end of the suction pipe 12 after heat exchange, the other end of the make-up air pipe 11 is connected to the air outlet duct 202, one end of the exhaust pipe is connected to the air outlet end of the waste heat exchange pipe 10 after heat exchange. The humidity of the waste heat gas after drying the gypsum board is very high, even if it is heated again, it will affect the drying effect, so part of the waste heat gas after drying is transported to the waste heat exchanger 6, at the same time, dry air is extracted from the atmosphere and enters the waste heat exchanger 6, so that the waste heat gas and the dry air are heat exchanged in the waste heat exchanger 6, the dry air is heated, and the heated dry air is transported back to the air outlet duct 202 from the make-up air pipe 11, and is used to dry the gypsum board together, thereby reducing the humidity of the dry air in the circulating air duct 2 and ensuring the drying effect. The waste heat air after heat exchange is discharged through the exhaust pipe, the other end of the exhaust pipe is connected with a heat exchange fan 16, the air outlet end of the heat exchange fan 16 is connected with a chimney 15, and the heat exchange fan 16 transports the waste heat air after heat exchange to the chimney 15 for discharge.

[0029] In the embodiment, each group of dry air groups is connected with a group of waste heat replacement assemblies, but the humidity of the waste heat air after drying of the first two groups of dry air groups is very high, but the humidity of the waste heat air after drying of the last group of dry air groups is very low, so the humidity of the waste heat air after drying of the last group of dry air groups is not very high, so one end of the waste heat exchange pipe 10 is connected to the return air duct 201 of the two groups of dry air groups close to one end of the drying main body 1, and the waste heat exchange pipe 10 can not be connected to the third group of dry air groups. The other end of the make-up air pipe 11 is connected to the circulating air duct 2 of each group of dry air groups, and of course the make-up air pipe 11 can not be connected to the third group of dry air groups, that is, the last group of dry air groups can not be connected with the waste heat replacement assembly.

[0030] In the embodiment, a preheating area 8 is arranged at one end of the front side of the drying main body 1, and a air supply assembly is connected to the preheating area 8, which supplies air with a temperature that is not very high to the preheating area 8, so that the gypsum board is preheated in the preheating area 8 before being dried in the drying main body 1. The air supply assembly comprises a waste heat recovery pipe 9. Since the third group of dry air groups is not connected with the waste heat exchange pipe 10 but is connected with the make-up air pipe 11 in the embodiment, air is continuously supplied to the third group of dry air groups, so one end of the waste heat recovery pipe 9 is connected to the last group of dry air groups, one end of the waste heat recovery pipe 9 is connected to the air outlet duct 202, and the other end of the waste heat recovery pipe 9 is connected to the preheating area 8. The waste heat air after drying is transported to the preheating area 8 through the waste heat recovery pipe 9 to heat the gypsum board. The preheating area 8 is connected with a preheating air outlet pipe 13, the air outlet end of the preheating air outlet pipe 13 is connected with a preheating fan 14, and the air outlet end of the preheating fan 14 is also connected with the chimney 15.

[0031] The gypsum board in the embodiment is preheated by the preheating area 8 and then enters the drying main body 1, and the gypsum board is conveyed in the drying main body 1 and dried by the drying air groups, which include the circulating air duct 2 and the steam heat exchanger 3, the burner 4 and the circulating fan 5 connected in sequence on the circulating air duct 2, and the two ends of the circulating air duct 2 are connected to the drying main body 1, respectively. The drying air is heated to high-temperature and high-pressure drying gas by the steam heat exchanger 3, the high-temperature and high-pressure drying gas is burned by the burner 4 to make the temperature enough to dry the gypsum board, and then the drying air is conveyed to the drying main body 1 by the circulating fan 5 through the circulating air duct 2, and then the drying air is returned to the drying air group through the return air end of the circulating air duct 2 along the length direction of the drying main body 1 and heated again to be conveyed to the drying main body 1 again, and the gypsum board is dried by the three drying air groups in sequence to complete the drying process. The steam heat exchanger 3 and the burner 4 are arranged, natural gas is used as an auxiliary heat source, the energy consumption is lower, the cost is low, the drying gas is heated by the burner 4 to make up for the defect that the high-temperature and high-pressure drying gas through the steam heat exchanger 3 is not high enough in temperature to dry the gypsum board efficiently, and the drying gas is heated by the burner 4 again instead of directly by the burner 4, so that the natural gas resource is not needed too much, and the energy stability of the gypsum board drying machine is effectively ensured in the area where the natural gas resource is not enough.

[0032] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content into equivalent embodiments. However, any simple modification, equivalent change and modification of the above embodiments without departing from the technical content of the present application, and according to the technical essence of the present application, still belong to the protection scope of the present application.

Claims

1. A high-efficiency gypsum board dryer, characterized in that: It includes a drying body (1) and a drying air group. The gypsum board is transported from one end of the drying body (1) to the other end. Several drying air groups are arranged in sequence along the length of the drying body (1). Each drying air group is connected to a waste heat air replacement component. The drying air group includes a circulating air duct (2) and a steam heat exchanger (3), a burner (4), and a circulating fan (5) that are connected in sequence on the circulating air duct (2). The two ends of the circulating air duct (2) are the air outlet and the air return, respectively. The air outlet and the air return are connected to the drying body (1) at intervals.

2. The high-efficiency gypsum board dryer according to claim 1, characterized in that: The circulating air duct (2) includes a return air duct (201) and an outlet air duct (202). The steam heat exchanger (3), burner (4), and circulating fan (5) are connected in sequence between the return air duct (201) and the outlet air duct (202). Several ovens (7) are arranged at intervals along the length direction on the drying body (1). The ends of the return air duct (201) and the outlet air duct (202) are respectively connected to two adjacent ovens (7).

3. The high-efficiency gypsum board dryer according to claim 1, characterized in that: The steam heat exchanger (3), burner (4), and circulating fan (5) of the first drying air group near one end of the drying body (1) are arranged in sequence from the end near the drying body (1) to the end away from the drying body (1). The air outlet of the circulating air duct (2) is arranged at the end away from the drying body (1), and the air return end of the circulating air duct (2) is arranged at the end near the drying body (1). The steam heat exchanger (3), burner (4), and circulating fan (5) of the remaining drying air groups are arranged in sequence from the end away from the drying body (1) to the end near the drying body (1).

4. The high-efficiency gypsum board dryer according to claim 1, characterized in that: The waste heat air replacement assembly includes a waste heat exchanger (6), a waste heat exchange tube (10), an air intake tube (12), a make-up air tube (11), and an exhaust tube. One end of the waste heat exchange tube (10) is connected to the circulating air duct (2) near the return air end, and the other end of the waste heat exchange tube (10) is connected to the air inlet end of the waste heat exchanger (6). One end of the air intake tube (12) is connected to the atmosphere, and the other end of the air intake tube (12) is also connected to the air inlet end of the waste heat exchanger (6). One end of the make-up air tube (11) is connected to the air outlet end of the air intake tube (12) after heat exchange, and the other end of the make-up air tube (11) is connected to the circulating air duct (2) near the air outlet end. One end of the exhaust tube is connected to the air outlet end of the waste heat exchange tube (10) after heat exchange.

5. A high-efficiency gypsum board dryer according to claim 4, characterized in that: Each group of drying air groups is connected to a group of waste heat air replacement components. One end of the waste heat exchange tube (10) is connected to the circulation air duct (2) of the two groups of drying air groups at least close to one end of the drying body (1), and the other end of the make-up air pipe (11) is connected to the circulation air duct (2) of each group of drying air groups.

6. The high-efficiency gypsum board dryer according to claim 4, characterized in that: The other end of the exhaust pipe is connected to a heat exchange fan (16), and the outlet of the heat exchange fan (16) is connected to a chimney (15).

7. The high-efficiency gypsum board dryer according to claim 1, characterized in that: A preheating zone (8) is provided on the front side of one end of the drying body (1), and the preheating zone (8) is connected to an air supply assembly.

8. A high-efficiency gypsum board dryer according to claim 7, characterized in that: The air supply assembly includes a waste heat recovery pipe (9), one end of which is connected to the drying air group near the other end of the drying body (1), one end of which is connected to the circulating air duct (2) near the air outlet, and the other end of which is connected to the preheating zone (8).

9. A high-efficiency gypsum board dryer according to claim 7 or 8, characterized in that: The preheating zone (8) is connected to a preheating air outlet pipe (13), the air outlet end of the preheating air outlet pipe (13) is connected to a preheating fan (14), and the air outlet end of the preheating fan (14) is connected to a chimney (15).

Images