CN211552489U

CN211552489U - Water circulation cooling system of wood heat treatment kiln

Info

Publication number: CN211552489U
Application number: CN202020047449.4U
Authority: CN
Inventors: 丛德宝
Original assignee: Kaiyuan Syd Timber Drying Equipment Co ltd
Current assignee: Kaiyuan Syd Timber Drying Equipment Co ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-09-22
Anticipated expiration: 2030-01-10

Abstract

The utility model discloses a water circulative cooling system of timber heat treatment kiln, including setting up the water cooling unit in the kiln body upper circulating air duct, the water cooling unit includes along kiln body length direction sets up inlet manifold and the water header in the kiln body upper circulating air duct, is equipped with a plurality of parallelly connected finned tubes between inlet manifold and water header, is equipped with many axial-flow type forced circulation fans along the length direction of the kiln body in the kiln body upper circulating air duct, finned tube flows the direction and arranges by dredging to close unequally interval in inlet manifold along the cooling water. This water circulative cooling system of timber heat treatment kiln can accelerate the cooling rate of heat treatment back high temperature timber, improves heat treatment kiln's utilization ratio, and each regional difference in temperature on kiln body length direction is little in the cooling process, and timber cooling is even, can not distort, fracture, and this water circulative cooling system of timber heat treatment kiln has simple structure, passes advantages such as the pipeline of kiln wall is few, control is convenient.

Description

Water circulation cooling system of wood heat treatment kiln

Technical Field

The utility model relates to a wood heat treatment device, in particular to a water circulation cooling system of a wood heat treatment kiln.

Background

The wood needs to be cooled from 190 ℃ to below 40 ℃ after the heat treatment is finished, the wood can be taken out of the kiln, a long time is needed for natural ventilation cooling by opening a kiln door, the ineffective retention time of the wood in a kiln body is long, and the utilization rate of the wood heat treatment kiln is low. In order to accelerate the cooling speed of high-temperature wood, a water cooler is usually arranged in a circulating air duct on a kiln body inside the kiln body, so that the air flow output by a circulating fan is cooled by the cooler and then sweeps the wood, and the aim of accelerating the cooling of the wood is fulfilled. When the method is adopted to cool the wood, the temperature distribution of each area in the kiln body needs to be uniform, and particularly the temperature difference of each section in the length direction of the kiln body is not too large, so that the high-temperature wood is not twisted or cracked in the cooling process, and the qualified heat-treated wood is produced. CN 205537147U discloses such a wood carbonization kiln circulating water cooling system, which comprises a plurality of finned radiators arranged between the inner wall and the outer wall of a carbonization kiln, and a fan arranged opposite to each finned radiator, wherein the finned radiators are connected with a water cooling tower outside the carbonization kiln through water pipes; each finned radiator comprises a body, a water inlet, a water outlet and a finned coil pipe, wherein the finned coil pipe is wound and fixed on the outer side of the body, the water inlet and the water outlet are respectively arranged at two ends of the finned coil pipe, and then the finned coil pipe is connected with a water cooling tower outside the carbonization kiln through a water pipe. In order to ensure that the temperature of the kiln body is uniformly distributed, each finned radiator is connected with an external water cooling tower through an independent water pipe, so that a plurality of water pipes are required to be inserted into the kiln wall, and great inconvenience is brought to the manufacturing of the wood carbonization kiln and the control of cooling water circulation in the heat treatment process. In addition, the circulating water cooling system of the wood carbonization kiln disclosed in CN 205537147U has no water pumping device, when the cooling of the wood is finished, the finned radiator and the water pipe have water residue, and the water remained in the pipeline can be gasified in the heat treatment process of the next batch of wood, so that huge pressure is generated, and potential safety production hazards exist.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is: the utility model provides a water circulative cooling system of timber heat treatment kiln, this water circulative cooling system of timber heat treatment kiln can accelerate the cooling rate of heat treatment back high temperature timber, reduce the time of the invalid dwell of timber in heat treatment kiln, improve heat treatment kiln's utilization ratio, and each regional difference in temperature on kiln body length direction is little in the cooling process, the timber cooling is even, can not distort, the fracture, this water circulative cooling system of timber heat treatment kiln has simple structure, the pipeline that passes the kiln wall is few, advantages such as control is convenient.

The technical scheme for solving the technical problem is as follows: the water circulation cooling system comprises a water cooling unit arranged in a circulation air channel on a kiln body and a water circulation unit arranged outside the kiln body, wherein the water cooling unit comprises a water inlet main pipe and a water outlet main pipe which are arranged in the circulation air channel on the kiln body along the length direction of the kiln body, a plurality of parallel finned tubes are arranged between the water inlet main pipe and the water outlet main pipe, a plurality of axial flow type forced circulation fans are arranged in the circulation air channel on the kiln body along the length direction of the kiln body, fan shafts of the axial flow type forced circulation fans are horizontally arranged perpendicular to the length direction of the kiln body and are arranged at equal intervals along the flowing direction of cooling water in the water inlet main pipe, and the finned tubes are arranged on the air outlet side of the axial flow type forced circulation fans and are arranged at unequal intervals from sparse to dense along the flowing direction of the cooling water in the water inlet main pipe.

As the improvement of the utility model: the hydrologic cycle unit is including establishing ties in order cooling water tank, cooling water circulating pump, the radiator between outlet main and inlet main, the hydrologic cycle unit still includes a pumping line, pipeline tee junction between pumping line one end and cooling water circulating pump and the cooling water tank, the pumping line other end passes through the pipeline connection between three-way valve and radiator and the inlet main, is equipped with the suction pump on the pumping line.

As a further improvement of the utility model: the water inlet of the cooling water circulating pump is positioned at the bottom of the cooling water tank, the upper part of the cooling water tank is also connected with a cooling water replenishing pipe, a water replenishing valve is arranged on the cooling water replenishing pipe, and an overflow type drain pipe is arranged in the water tank.

As the utility model discloses a further improvement again: the water replenishing valve is an electromagnetic water replenishing valve, and a water temperature sensor is arranged in the cooling water tank.

As a further improvement of the utility model: the three-way valve is an electric three-way valve.

As another improvement of the utility model: the tail end of the water inlet main pipe is provided with an exhaust pipe communicated with the water inlet main pipe and the water outlet main pipe, the upper end of the exhaust pipe extends out of the kiln body, and an exhaust port of the exhaust pipe is provided with an automatic exhaust valve.

Has the advantages that: the utility model discloses a water circulation cooling system of wood heat treatment kiln, the water circulation cooling system of wood heat treatment kiln includes the water cooling unit of setting in the kiln body upper circulating air duct and the water circulation unit of setting outside the kiln body, the water cooling unit includes the inlet manifold and the outlet manifold that set up in kiln body upper circulating air duct along kiln body length direction, is equipped with a plurality of finned tubes that connect in parallel between inlet manifold and outlet manifold, is equipped with many axial-flow type forced circulation fans along the length direction of kiln body in the kiln body upper circulating air duct, the fan shaft of axial-flow type forced circulation fan is perpendicular to kiln body length direction horizontal arrangement, and flow direction equidistant arrangement in inlet manifold along the cooling water, the finned tube sets up in axial-flow type forced circulation fan outlet air mouth side, and flow direction in inlet manifold along the cooling water by the technical scheme of sparse to close unequal interval arrangement, the near-end water temperature of the water inlet main pipe is low, the far-end water temperature of the water inlet main pipe is high in the cooling process, the temperature of airflow finally blown to the wood by each forced circulation fan is basically consistent by adjusting the density of the finned tubes, so that the uniformity of the temperature in the length direction of the kiln body is ensured, the wood is not twisted or cracked while the cooling speed of the wood is accelerated, and the quality of heat treatment is ensured. Owing to adopted the hydrologic cycle unit is including establishing ties in order cooling water tank, cooling water circulating pump, radiator between water outlet main and water inlet main, the hydrologic cycle unit still includes a pumping pipe way, pipeline tee junction between pumping pipe way one end and cooling water circulating pump and the cooling water tank, the pumping pipe other end passes through the pipe connection between three-way valve and radiator and the water inlet main, is equipped with the technical characterstic of suction pump on the pumping pipe way, after cooling process, thoroughly takes out water remaining in with water inlet main, finned tube, the water outlet main with the suction pump, prevents effectively that remaining water from taking place acutely to vaporize, producing the high pressure and bringing the potential safety hazard in next batch of timber heat treatment process, has improved the security performance of equipment. The water inlet of the cooling water circulating pump is arranged at the bottom of the cooling water tank, the upper part of the cooling water tank is also connected with a cooling water replenishing pipe, a water replenishing valve is arranged on the cooling water replenishing pipe, and the technical characteristic of an overflow type drain pipe is arranged in the water tank. The water replenishing valve is an electromagnetic water replenishing valve, and the cooling water tank is internally provided with a water temperature sensor, so that the electromagnetic water replenishing valve and the water temperature sensor can be connected with central control equipment of the wood heat treatment kiln, the water temperature in the cooling water tank is detected through the central control, and when the water temperature reaches a preset value, the electromagnetic water replenishing valve is started to automatically replenish water, thereby being beneficial to improving the automation degree of the equipment. Due to the technical characteristic that the three-way valve is an electric three-way valve, the operation of the cooling system is more convenient. The exhaust pipe communicated with the water inlet main pipe and the water outlet main pipe is arranged at the tail end of the water inlet main pipe, the kiln body extends out of the upper end of the exhaust pipe, and the exhaust port of the exhaust pipe is provided with the automatic exhaust valve, so that steam generated by water entering the pipeline at the initial cooling stage can be timely exhausted, air resistance and high pressure in the pipeline are prevented, and the safety of equipment and the normal circulation of cooling water are ensured.

Drawings

FIG. 1 is a schematic diagram of the water circulation cooling system of the wood heat treatment kiln of the present invention.

Detailed Description

As shown in figure 1, the water circulation cooling system of the wood heat treatment kiln of the utility model comprises a water cooling unit 1 arranged in a circulation air duct 33 on a kiln body 3 and a water circulation unit 2 arranged outside the kiln body. The kiln body upper circulating air duct is a space between a kiln body top plate 34 and an upper partition plate 32, the upper partition plate is parallel to the kiln body top plate, and a gap for circulating airflow to pass through is reserved between the upper partition plate and two side walls 31 of the kiln body.

The water cooling unit comprises a water inlet main pipe 16 and a water outlet main pipe 15 which are arranged in a circulating air duct on the kiln body along the length direction of the kiln body, the water inlet end of the water inlet main pipe, namely the near end and the water outlet end of the water outlet main pipe penetrate through the kiln wall to be connected with the water circulating unit outside the kiln body, the water outlet main pipe is arranged above the water inlet main pipe and parallel to the water inlet main pipe, a plurality of finned tubes 14 which are connected in parallel are arranged between the water inlet main pipe and the water outlet main pipe, a plurality of axial flow type forced circulating fans 13 are arranged in the circulating air duct on the kiln body along the length direction of the kiln body, the fan shafts of the axial flow type forced circulating fans are horizontally arranged vertical to the length direction of the kiln body, the forced circulating fans are arranged at equal intervals along the flowing direction of cooling water in the water inlet main pipe, the finned tubes are arranged at the air outlet side of the axial flow type forced circulating fans and are arranged, the interval of the adjacent finned tube of inlet main near-end side is big promptly, and the interval of the adjacent finned tube of inlet main distal end side is little, is equipped with the blast pipe 12 that feeds through inlet main and outlet main at inlet main's end, and the kiln body that extends of blast pipe upper end is equipped with automatic exhaust valve 11 on the gas vent of blast pipe, and the diameter of blast pipe equals with the diameter of finned tube, and all is less than inlet main and outlet main's diameter.

The water circulation unit includes cooling water tank 24, cooling water circulating pump 29, radiator 26 of establishing ties between water outlet main and water inlet main in order, connects through connecting water pipe and necessary pipe fitting, valve between cooling water tank, cooling water circulating pump, the radiator is fin fan radiator, the water circulation unit still includes a suction line 27, pipeline tee junction between suction line one end and cooling water circulating pump and the cooling water tank, the suction line other end passes through the pipeline connection between three-way valve 21 and radiator and the water inlet main, is equipped with suction pump 28 on the suction line, and the water inlet of cooling water circulating pump is located cooling water tank's bottom, has still connect cooling water moisturizing pipe 22 on cooling water tank upper portion, is equipped with moisturizing valve 23 on the cooling water moisturizing pipe, is equipped with overflow formula drain pipe 25 in the water tank, the moisturizing valve is the electromagnetism moisturizing valve, a water temperature sensor is provided in the cooling water tank, the three-way valve is preferably an electric three-way valve, and an electric valve 20 is preferably provided at a drain port of the overflow drain pipe and a water inlet of the cooling water circulation pump.

The utility model discloses a timber heat treatment kiln's water circulative cooling system during operation, the cooling water circulating pump makes the cooling water in the cooling water tank loop through the radiator, the three-way valve, the water inlet manifold, the finned tube, return water manifold returns cooling water tank, in the circulation process, forced circulation fan in the kiln body upper circulation wind channel makes the internal air current of kiln circulate in the kiln after the finned tube cooling, sweep the cooling to high temperature timber, after cooling process ends, close the cooling water circulating pump, switch over the relation of switching on of three-way valve, open the suction pump with water inlet manifold, the finned tube, residual cooling water takes out cooling water tank completely in the return water manifold, can get into next batch of timber heat treatment.

Claims

1. The utility model provides a water circulating cooling system of timber heat treatment kiln, is including setting up the water cooling unit in the kiln body upper circulating air duct and setting up the water circulating unit outside the kiln body, characterized by: the water cooling unit comprises a water inlet main pipe and a water outlet main pipe which are arranged in a circulating air duct on the kiln body along the length direction of the kiln body, a plurality of finned tubes which are connected in parallel are arranged between the water inlet main pipe and the water outlet main pipe, a plurality of axial flow type forced circulation fans are arranged in the circulating air duct on the kiln body along the length direction of the kiln body, fan shafts of the axial flow type forced circulation fans are horizontally arranged perpendicular to the length direction of the kiln body and are arranged at equal intervals along the flowing direction of cooling water in the water inlet main pipe, and the finned tubes are arranged on the air outlet side of the axial flow type forced circulation fans and are arranged at unequal intervals from sparse to dense along the flowing direction of the cooling water in the water inlet main pipe.

2. The water circulation cooling system of wood heat treatment kiln according to claim 1, characterized in that: the hydrologic cycle unit is including establishing ties in order cooling water tank, cooling water circulating pump, the radiator between outlet main and inlet main, the hydrologic cycle unit still includes a pumping line, pipeline tee junction between pumping line one end and cooling water circulating pump and the cooling water tank, the pumping line other end passes through the pipeline connection between three-way valve and radiator and the inlet main, is equipped with the suction pump on the pumping line.

3. The water circulation cooling system of wood heat treatment kiln according to claim 2, characterized in that: the water inlet of the cooling water circulating pump is positioned at the bottom of the cooling water tank, the upper part of the cooling water tank is also connected with a cooling water replenishing pipe, a water replenishing valve is arranged on the cooling water replenishing pipe, and an overflow type drain pipe is arranged in the water tank.

4. The water circulation cooling system of wood heat treatment kiln according to claim 3, characterized in that: the water replenishing valve is an electromagnetic water replenishing valve, and a water temperature sensor is arranged in the cooling water tank.

5. The water circulation cooling system of wood heat treatment kiln according to any one of claims 2 to 4, characterized in that: the three-way valve is an electric three-way valve.

6. The water circulation cooling system of wood heat treatment kiln according to any one of claims 1 to 4, characterized in that: the tail end of the water inlet main pipe is provided with an exhaust pipe communicated with the water inlet main pipe and the water outlet main pipe, the upper end of the exhaust pipe extends out of the kiln body, and an exhaust port of the exhaust pipe is provided with an automatic exhaust valve.