Low nitrogen organic heat carrier boiler

Abstract

The present invention provides a low-nitrogen organic heat carrier boiler, which belongs to the technical field of heating equipment. It includes a furnace body, an air inlet pipe and an air outlet pipe. The furnace body has a heating chamber. One end of the furnace body is provided with a water inlet header fixedly connected to the furnace body, and the other end of the furnace body is provided with a water outlet header slidably connected to the heating chamber. A plurality of hot water pipes are connected between the water inlet header and the water outlet header, and the hot water pipes are spiral elastic components; from the inside to the outside, the outer diameter of each hot water pipe in the heating chamber gradually increases, so that the hot water pipe with a larger outer diameter is sleeved outside the hot water pipe with a smaller outer diameter; a control structure for intermittently discharging gas is provided at the air outlet pipe. The present invention has the advantages of high waste heat utilization rate and long maintenance cycle.

Description

Technical Field

[0001] The invention belongs to the technical field of heating equipment and relates to a low-nitrogen organic heat carrier boiler. Background Art

[0002] An organic heat carrier boiler refers to a heat energy conversion device whose heat carrier medium is high-temperature heat transfer oil. It has the advantage of high heating temperature. However, precisely because of its high medium temperature, the temperature of the flue gas is also relatively high. After the flue gas is discharged, it is condensed and cooled and then discharged from the chimney. The utilization rate is low, there is a large amount of heat energy loss, the condensation energy consumption is also high, and the cost required to meet the emission standards is also high.

[0003] Although the reuse of flue gas can achieve the goal of energy conservation and emission reduction, the presence of dust and other substances in the flue gas causes many defects in the flue gas utilization equipment, and the maintenance cycle and maintenance cost are both high. Summary of the invention

[0004] The purpose of the present invention is to provide a low-nitrogen organic heat carrier boiler in view of the above-mentioned problems existing in the prior art. The technical problem to be solved by the present invention is how to utilize the flue gas discharged from the low-nitrogen organic heat carrier boiler for heat utilization.

[0005] The object of the present invention can be achieved through the following technical solutions: a low-nitrogen organic heat carrier boiler, characterized in that it includes a furnace body, an air inlet pipe and an air outlet pipe, the furnace body has a heating chamber, one end of the furnace body is provided with an inlet collecting tank fixedly connected to the furnace body, the other end of the furnace body is provided with an outlet collecting tank slidably connected to the heating chamber, a plurality of hot water pipes are connected between the inlet collecting tank and the outlet collecting tank, and the hot water pipes are spiral elastic components; from the inside to the outside, the outer diameter of each hot water pipe in the heating chamber gradually increases, so that the hot water pipe with a larger outer diameter is arranged outside the hot water pipe with a smaller outer diameter; the air outlet pipe is provided with a control structure for intermittently discharging gas.

[0006] Furthermore, the control structure includes a valve body connected to the air outlet pipe, the valve body has an outlet, the middle part of the valve body has a mesh partition, the partition is slidably connected to a valve stem, one end of the valve stem has a valve head, a return spring is connected between the iron valve head and the partition, the valve head can block the outlet in the natural state of the return spring, the other end of the valve stem has an iron adsorption head, and a permanent magnet block capable of adsorbing the iron adsorption head is arranged in the water outlet collecting tank, and the permanent magnet block is located on the inner side of the iron valve head when the hot water pipe is under tension.

[0007] Furthermore, an inner cylinder is arranged in the furnace body, a mixed flow cavity is formed between the inner cylinder and the furnace body, and a plurality of vent holes are opened on the inner cylinder.

[0008] Furthermore, the outer side surface of the water outlet collecting box has a pull ring.

[0009] Furthermore, the heated water pipes are in a natural state and are in contact with each other.

[0010] Furthermore, each heated water pipe is connected in series between the water inlet header tank and the water outlet header tank.

[0011] Furthermore, there is a spacing between adjacent hot water pipes, and the spacing between adjacent hot water pipes gradually decreases from the inside to the outside.

[0012] Furthermore, the medium flowing in the heated water pipe is water.

[0013] The high-temperature flue gas discharged from the low-nitrogen organic heat carrier boiler enters the heating chamber from the air inlet pipe, and heats the fluid in each hot water pipe in the heating chamber. The water inlet collecting tank is connected to the cold medium source, and the water outlet collecting tank is connected to the heat-using equipment. The heat of the flue gas is utilized while the temperature of the flue gas is reduced, the condensing equipment is omitted, the structure is simplified, and the effect of energy saving and emission reduction is achieved.

[0014] Since the hot water pipe is in contact with the flue gas for a long time, the dust and other substances in the flue gas are easy to adhere to the outer wall of the hot water pipe, causing maintenance difficulties. In this regard, the present scheme adopts an elastic spiral tube, and sets a control structure for intermittently closing the outlet pipe at the outlet pipe, so that the pressure in the heating cavity fluctuates, and then the hot water pipe is in a state of continuous stretching and reset. The hot water pipe is in a dynamic state, and the scale adhered to its surface can be "exploded" or peeled off during the deformation of the hot water pipe. Moreover, since the gap between the hot water pipe's adjacent ring is in a constantly changing state, the pressure of the flue gas passing through the gap is also in a constantly changing state, which has a cleaning effect on the scale adhered to the wall of the hot water pipe. Under normal conditions, the adjacent ring of the hot water pipe abuts against each other, so that when the hot water pipe is reset and contracted, the adjacent rings collide with each other, which can further improve the descaling effect.

[0015] The mixed flow chamber can increase the flow path of the airflow in the heated chamber and prevent it from being quickly discharged from the exhaust pipe. Since the flue gas needs to pass through the adjacent gaps of each heated water pipe from the inside to the outside before it can be discharged, the utilization rate of the heat in the flue gas is higher. The heated water in each heated water pipe enters the water outlet collecting tank and is utilized after being homogenized.

[0016] There are many specific ways to control the structure. For example, an electric valve is set at the outlet pipe. Intermittent control of the opening and closing of the electric valve can also achieve intermittent exhaust of smoke.

[0017] In this solution, when the water outlet collecting tank stretches the heated water pipe due to the high pressure in the heated chamber, the valve head is in a state of blocking the outlet. When the water outlet collecting tank moves to a position corresponding to the valve stem, the permanent magnet block adsorbs the iron adsorption block at one end of the valve stem, causing the valve head to open the outlet and the smoke can be discharged.

[0018] During cleaning, the water outlet collecting box can be separated from the furnace body by connecting the pull ring through hydraulic equipment to flush the heating cavity, or the heating cavity and the hot water pipes located in the heating cavity can be cleaned by circulating the cleaning liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a flue gas cooling device for utilizing high-temperature flue gas from a low-nitrogen organic heat carrier boiler.

[0020] Figure 2 It is a structural diagram of the heated tube in its natural state.

[0021] Figure 3 It is a structural schematic diagram of the heated pipe in a stretched state.

[0022] Figure 4 yes Figure 1 Enlarged view of part A in the figure.

[0023] In the figure, 1, furnace body; 11, heating chamber; 12, water inlet collecting tank; 13, water outlet collecting tank; 14, pull ring; 21, air inlet pipe; 22, air outlet pipe; 3, hot water pipe; 41, valve body; 42, outlet; 43, partition; 44, valve stem; 45, valve head; 46, return spring; 47, iron adsorption head; 48, permanent magnet block; 51, inner cylinder; 52, mixed flow chamber; 53, vent. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1 to Figure 4 As shown, it includes a furnace body 1, an air inlet pipe 21 and an air outlet pipe 22. The furnace body 1 has a heating chamber 11. One end of the furnace body 1 is provided with a water inlet collecting tank 12 fixedly connected to the furnace body 1, and the other end of the furnace body 1 is provided with a water outlet collecting tank 13 slidably connected to the heating chamber 11. A plurality of hot water pipes 3 are connected between the water inlet collecting tank 12 and the water outlet collecting tank 13. The hot water pipes 3 are spiral elastic components. From the inside to the outside, the outer diameters of the hot water pipes 3 in the heating chamber 11 gradually increase, so that the hot water pipes 3 with larger outer diameters are arranged outside the hot water pipes 3 with smaller outer diameters. A control structure for intermittently discharging gas is provided at the air outlet pipe 22.

[0026] The control structure includes a valve body 41 connected to the air outlet pipe 22, the valve body 41 has an outlet 42, the middle part of the valve body 41 has a mesh partition 43, the partition 43 is slidably connected to a valve stem 44, one end of the valve stem 44 has a valve head 45, a return spring 46 is connected between the iron valve head 45 and the partition 43, the valve head 45 can block the outlet 42 in the natural state of the return spring 46, the other end of the valve stem 44 has an iron adsorption head 47, and a permanent magnet block 48 capable of adsorbing the iron adsorption head 47 is arranged in the water outlet collecting tank 13, and the permanent magnet block 48 is located on the inner side of the iron valve head 45 when the hot water pipe 3 is under tension.

[0027] An inner cylinder 51 is disposed in the furnace body 1 , a mixing flow chamber 52 is formed between the inner cylinder 51 and the furnace body 1 , and a plurality of vent holes 53 are formed on the inner cylinder 51 .

[0028] The outer side of the water outlet collecting box 13 has a pull ring 14 .

[0029] The heated water pipes 3 are in a natural state and are in contact with each other.

[0030] Each heated water pipe 3 is connected in series between the water inlet header tank 12 and the water outlet header tank 13 .

[0031] There is a distance between adjacent hot water pipes 3 , and the distance between adjacent hot water pipes 3 decreases gradually from the inside to the outside.

[0032] The medium flowing in the heated water pipe 3 is water.

[0033] The high-temperature flue gas discharged from the low-nitrogen organic heat carrier boiler enters the heating chamber 11 from the air inlet pipe 21, and heats the fluid in each hot water pipe 3 located in the heating chamber 11. The water inlet collecting tank 12 is connected to the cold medium source, and the water outlet collecting tank 13 is connected to the heat-using equipment, so that the heat of the flue gas is utilized while reducing the temperature of the flue gas, omitting the condensing equipment, simplifying the structure, and achieving the effect of energy saving and emission reduction.

[0034] Since the hot water pipe 3 is in contact with the flue gas for a long time, the dust and other substances in the flue gas are easy to adhere to the outer wall surface of the hot water pipe 3, causing problems such as difficult maintenance. In this regard, the present scheme adopts the method of elastic spiral tube, and sets a control structure for intermittently closing the outlet pipe 22 at the outlet pipe 22, so that the pressure in the heating chamber 11 fluctuates, and then the hot water pipe 3 is in a state of continuous stretching and reset. The hot water pipe 3 is in a dynamic state, and the scale adhered to its surface can be "exploded" or peeled off during the deformation of the hot water pipe 3. Moreover, since the adjacent ring gap of the hot water pipe 3 is in a constantly changing state, the pressure of the flue gas passing through the gap is also in a constantly changing state, which has a cleaning effect on the gray scale adhered to the wall surface of the hot water pipe 3. Under normal conditions, the adjacent ring of the hot water pipe 3 abuts against each other, so that when the hot water pipe 3 is reset and contracted, the adjacent rings collide with each other, which can further improve the descaling effect.

[0035] The mixed flow chamber 52 can increase the flow path of the airflow in the heating chamber 11 to prevent it from being quickly discharged from the exhaust pipe 22. Since the smoke needs to pass through the adjacent gaps of each hot water pipe 3 from the inside to the outside in turn before it can be discharged, the utilization rate of the heat in the smoke is relatively high. The heated water in each hot water pipe 3 enters the water outlet collecting tank 13 and is utilized after being homogenized.

[0036] There are many specific ways to control the structure. For example, an electric valve is provided at the outlet pipe 22. Intermittent control of the opening and closing of the electric valve can also achieve intermittent exhaust of smoke.

[0037] In this solution, when the water outlet collecting tank 13 stretches the heated water pipe 3 due to the high pressure in the heated chamber 11, the valve head 45 is in a state of blocking the outlet 42. When the water outlet collecting tank 13 moves to a position corresponding to the valve stem 44, the permanent magnet block 48 adsorbs the iron adsorption block at one end of the valve stem 44, causing the valve head 45 to open the outlet 42, and the smoke can be discharged.

[0038] During cleaning, the pull ring 14 is connected by hydraulic equipment to separate the water outlet collecting box 13 from the furnace body 1, and the heating chamber 11 can be flushed, or the heating chamber 11 and the heated water pipe 3 located in the heating chamber 11 can be cleaned by circulating the cleaning liquid.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A low-nitrogen organic heat carrier boiler, characterized in that: The invention comprises a furnace body (1), an air inlet pipe (21) and an air outlet pipe (22) connected to a smoke exhaust pipe of a low-nitrogen organic heat carrier boiler, wherein the furnace body (1) has a heating chamber (11) therein, and one end of the furnace body (1) is provided with a water inlet collecting tank (12) fixedly connected to the furnace body (1), and the other end of the furnace body (1) is provided with a water outlet collecting tank (13) slidably connected to the heating chamber (11), and a plurality of hot water pipes (3) are connected between the water inlet collecting tank (12) and the water outlet collecting tank (13), wherein the hot water pipes (3) are spiral elastic components; from the inside to the outside, the outer diameter of each hot water pipe (3) in the heating chamber (11) gradually increases, so that the hot water pipe (3) with a larger outer diameter is sleeved outside the hot water pipe (3) with a smaller outer diameter; and a control structure for intermittently discharging gas is provided at the air outlet pipe (22); The control structure comprises a valve body (41) connected to the air outlet pipe (22), the valve body (41) having an outlet (42), a mesh partition (43) in the middle of the valve body (41), a valve stem (44) slidably connected to the partition (43), one end of the valve stem (44) having a valve head (45), a return spring (46) connected between the iron valve head (45) and the partition (43), the valve head (45) being capable of blocking the outlet (42) in the natural state of the return spring (46), the other end of the valve stem (44) having an iron adsorption head (47), a permanent magnet block (48) capable of adsorbing the iron adsorption head (47) being arranged in the water outlet collecting tank (13), the permanent magnet block (48) being located on the inner side of the valve head (45) when the heated water pipe (3) is in a tensioned state; An inner cylinder (51) is disposed in the furnace body (1), a mixed flow cavity (52) is formed between the inner cylinder (51) and the furnace body (1), and a plurality of ventilation holes (53) are provided on the inner cylinder (51); The outer side surface of the water outlet collecting box (13) is provided with a pull ring (14).

2. A low-nitrogen organic heat carrier boiler according to claim 1, characterized in that: The heated water pipes (3) are in a natural state and are in contact with each other.

3. A low-nitrogen organic heat carrier boiler according to claim 1, characterized in that: The heated water pipes (3) are connected in series between the water inlet header tank (12) and the water outlet header tank (13).

4. A low-nitrogen organic heat carrier boiler according to claim 1, characterized in that: There is a spacing between adjacent hot water pipes (3), and the spacing between adjacent hot water pipes (3) gradually decreases from the inside to the outside.

5. A low-nitrogen organic heat carrier boiler according to claim 1, characterized in that: The medium flowing in the heated water pipe (3) is water.

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