Energy-saving and environment-friendly water-cooled boiler

Abstract

An energy-saving and environment-friendly water-cooled boiler relates to the new technical field of gas field development, production, operation and maintenance and comprises a boiler body, a combustion chamber, a spiral coil and a double-wall flue. The inside of the boiler body is divided into a water storage chamber and a heating chamber through a partition, a combustion chamber and a flue are arranged in the heating chamber, a combustor is arranged above the combustion chamber, a coil pipe is arranged below the combustor, the coil pipe is formed by attaching and welding a plurality of spiral pipes of the same specification, the coil pipe is horizontally arranged, and the upper end face and the lower end face of the coil pipe are sealed. The combustor is arranged above the center of the coil pipe, hot smoke is evenly diffused to the flue along the spiral gap, the problem that heat flow distribution of a traditional sleeve doll type coil pipe is uneven is solved, heat efficiency is effectively improved, and the effect of saving energy is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of boiler, especially relates to an energy -conserving and environment -friendly water -cooled boiler. BACKGROUND

[0002] Boiler heating device is the equipment commonly used in oilfield production, and hot water or steam generated by the boiler needs to be used for thawing or cleaning work in field operation. For example, the authorized announcement number: CN202709434U discloses an energy -conserving and environment -friendly water jacket furnace boiler, and the biggest feature of the application is the special design of the coil and flue direction, and the smoke is folded back up and down between four layers of coils, thereby the heat energy carried by the smoke is maximized to the heating coil, thereby the temperature of the smoke when discharging is reduced, and the heat efficiency is improved.

[0003] But the defects of the above patent in the use process are: the smoke return flow rate is different in the circumferential direction of the coil (different phase angles), wherein the smoke return flow rate between the multilayer coils close to the flue side is fast, and the smoke return flow rate between the multilayer coils away from the flue side is slow, that is, most of the hot smoke flows out from the multilayer coils close to the flue side, and the amount of hot smoke returned from the multilayer coils away from the flue side is small, so the heat efficiency of the above patent still needs to be improved. UTILITY MODEL CONTENT

[0004] In order to further improve the heat efficiency of the water-cooled boiler, the utility model provides an energy -conserving and environment -friendly water -cooled boiler, the utility model changes the design of the coil, changes the original "nested doll" type coil into spiral coil, changes the original return exhaust smoke into spiral exhaust smoke, and heat exchange is generated with the spiral coil during the discharging process, the flow rate and flow of the coil passed by the smoke during the discharging process are almost the same, so the heat transfer is more uniform, and the heat efficiency is higher.

[0005] The utility model provides a technical scheme: an energy -conserving and environment -friendly water -cooled boiler, including furnace body, combustion chamber, coil, flue, partition and water tank, the furnace body is divided into water storage chamber and heating chamber by the partition, the water storage chamber and the heating chamber are communicated through the pipeline, the combustion chamber and the flue are vertically arranged in the heating chamber, the combustion chamber is provided with the burner, the lower portion of the burner is provided with the coil, the coil is formed by the adhesion of a plurality of spiral pipes with same specification, and the coil is formed in spiral shape, the outer end of all spiral pipes is connected to the same water inlet pipe, the inner end of all spiral pipes is connected to the same water outlet pipe, the spiral coil is horizontally placed, the upper end face and the lower end face of the coil are sealed, the central portion of the upper end face of the coil is communicated with the burner, the hot smoke generated by the burner passes through the spiral gap of the coil, and the outlet of the spiral gap is communicated with the side surface of the flue.

[0006] Further technical scheme is: the spiral pipe is seamless steel pipe.

[0007] Further technical solutions are: the abutment between every two adjacent spiral tubes is sealed and welded to avoid leakage of hot gas from the abutment.

[0008] Further technical solutions are: the flue is of double-wall structure, and the chamber between the double walls is connected with the heating chamber on one hand and connected with the water inlet pipe on the other hand.

[0009] Compared with the prior art, the utility model has the beneficial effects that:

[0010] 1. The coil of the present application is formed by stacking a plurality of spiral tubes, and the coil has spiral gaps, hot smoke is discharged from the inside of the coil through the spiral, the outlet of the spiral gap is connected with the side of the flue, and the smoke flow rate and flow volume of the coil at all positions are the same during the whole smoke exhaust process, so that the coil can completely absorb heat and has higher heat efficiency.

[0011] 2. During the whole smoke exhaust process, the hot smoke is discharged spirally and does not flow back, so that the smoke exhaust is more smooth and there is no situation of choking smoke. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 is a schematic view of the facade structure of the utility model.

[0013] Fig. 2 is a top view of the coil and the flue in the utility model.

[0014] In the drawing: 1, water storage chamber; 2, water inlet; 3, flue; 4, chamber; 5, heating chamber; 6, burner; 7, water outlet pipe; 8, coil; 9, water outlet; 10, partition; 11, water inlet pipe. DETAILED DESCRIPTION

[0015] In order to make the technical problems, technical solutions and beneficial effects of the utility model clearer, the utility model is further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and do not limit the utility model.

[0016] REFERENCE Figs. 1-2The embodiment includes a furnace body, a combustion chamber, a coil 8, a flue 3, a partition 10 and a water tank. The furnace body is divided into a water storage chamber 1 and a heating chamber 5 by the partition 10. The water storage chamber 1 and the heating chamber 5 are connected through a pipeline. A water pump can be arranged on the pipeline to send water in the water storage chamber 1 into the heating chamber 5. The combustion chamber and the flue 3 are vertically arranged in the heating chamber 5. The water level in the heating chamber 5 is always kept at a certain height, so that more heat of the flue 3 is absorbed. The combustion chamber is provided with a burner 6 above. The burner 6 promotes combustion by mixing oxygen through a fan. The coil 8 is arranged below the burner 6. The coil 8 is formed by sequentially adhering and stacking a plurality of spiral pipes with the same specification, and has a spiral shape (as shown in the top view of the coil 8). Fig. 2 The outer ends of all the spiral pipes are connected to the same water inlet pipe 11, and the inner ends of all the spiral pipes are connected to the same water outlet pipe 7. The spiral coil 8 is horizontally placed. The upper end surface and the lower end surface of the coil 8 are sealed. The central part of the upper end surface of the coil 8 is communicated with the burner 6. The hot smoke generated by the burner 6 passes through the spiral gaps of the coil 8. The outlet of the spiral gaps is communicated with the side surface of the flue 3.

[0017] In the prior art, the flue 3 is arranged on one side of the “nested doll” type coil 8. The flow rate of the hot smoke near the flue 3 is the fastest, and the flow rate of the hot smoke far from the flue 3 is not so fast. Therefore, the flow of the hot smoke is uneven, and the heat exchange rate is high in some places and low in some places. In the present application, the flue 3 is spiral. The flow rates of the hot smoke at different positions are almost the same, and the heat exchange rates at different positions are consistent. Therefore, the overall heat exchange rate of the present application is as high as 94%, which is better than the prior art.

[0018] The spiral pipe is a seamless steel pipe, which has low failure rate and strong pressure resistance.

[0019] The adhering parts between every two adjacent spiral pipes are sealingly welded and connected, so as to avoid leakage of hot gas from the adhering parts, thereby reducing the discharge path of part of the hot gas.

[0020] The flue 3 has a double-wall structure. The upper part of the chamber 4 between the double walls is provided with a water inlet 2. The water inlet 2 is connected with the heating chamber 5. The water in the heating chamber 5 is introduced into the chamber 4 through a water pump. The lower part of the chamber 4 between the double walls is provided with a water outlet 9. The water outlet 9 is connected with the water inlet pipe 11. The purpose of this design is to increase the flow rate of the water outside the flue 3, so as to absorb more heat of the flue 3 and reduce heat loss.

[0021] The working process of the present application is as follows: the burner 6 is ignited, and the combustion-supporting air mixing fan of the burner 6 is turned on. The hot smoke generated by the burner 6 enters from the spiral gaps on the inner side of the coil 8 and is discharged from the spiral gaps on the outer side of the coil 8 into the flue 3. Fig. 2The arrow direction in the figure is the exhaust path of the hot flue gas, at the same time, the water in the water storage chamber 1 is pumped to the heating chamber 5, the water in the heating chamber 5 is pumped to the cavity 4 of the double-wall flue 3, the water in the cavity 4 enters the water inlet pipe 11 connected with the outside end of each spiral pipe, and then the water enters each spiral pipe, the heat of the hot flue gas exchanges with the water in each spiral pipe, so that the water temperature in each spiral pipe continuously rises, until the water temperature entering the water outlet pipe 7 reaches the highest.

[0022] As known from the above, the smoke exhaust process of the present application is without a turning-back path, so the flue gas exhaust is more smooth, and there is no situation of choking smoke. Due to the smooth flue gas exhaust (without turning-back smoke exhaust), the amount of black dust accumulated on the coil pipe 8 due to the combustion of the diesel burner 6 is greatly reduced, and the energy saving is better.

Claims

1. An energy-saving and environmentally friendly water-cooled boiler, comprising a boiler body, a combustion chamber, a coil (8), a flue (3), a partition (10), and a water tank, wherein the boiler body is divided into a water storage chamber (1) and a heating chamber (5) by the partition (10), the water storage chamber (1) and the heating chamber (5) are connected by a pipeline, the combustion chamber and the flue (3) are vertically arranged in the heating chamber (5), a burner (6) is arranged above the combustion chamber, and a coil (8) is arranged below the burner (6), characterized in that: The coil pipe (8) is formed by several spiral pipes with same specification which are stacked in sequence, and the coil pipe (8) is formed in spiral shape, the outer ends of all the spiral pipes are connected to the same water inlet pipe (11), the inner ends of all the spiral pipes are connected to the same water outlet pipe (7), the spiral coil pipe (8) is horizontally placed, the upper end surface and the lower end surface of the coil pipe (8) are sealed, the central part of the upper end surface of the coil pipe (8) is communicated with the burner (6), the hot smoke generated by the burner (6) passes through the spiral gaps of the coil pipe (8), and the outlet of the spiral gaps is communicated with the side surface of the flue (3).

2. The energy-saving and environment-friendly water-cooled boiler according to claim 1, characterized in that: The spiral pipe is a seamless steel pipe.

3. The energy-saving and environment-friendly water-cooled boiler according to claim 1, characterized in that: The abutment between every two adjacent spiral pipes is sealed and welded.

4. The energy-saving and environment-friendly water-cooled boiler according to claim 1, characterized in that: The flue (3) is a double-wall structure, the chamber (4) between the double walls is connected with the heating chamber (5) on one hand, and connected with the water inlet pipe (11) on the other hand.

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