Portable heater

Abstract

The utility model relates to the technical field of direct heat exchange equipment, in particular to a portable heater, which comprises a gas inlet pipe, a gas-liquid mixing pipe and a jacket. The steam-liquid mixing device is reasonable and compact in structure and convenient to use, steam can be throttled and depressurized through the air inlet pipe with the inner diameter sequentially reduced from right to left, so that the outflow speed of the steam is far higher than the inflow speed of the steam, negative pressure is formed on the right portion of the steam-liquid mixing pipe, cold water is sucked into the steam-liquid mixing pipe from the jacket and mixed with the steam, and the steam-liquid mixing effect is improved. And the cold water absorbs the latent heat of vaporization to heat up and is quickly and efficiently heated into hot water, so that the caustic soda flake production workshop still has sufficient hot water to clean alkali deposits on production equipment and in pipelines during shutdown maintenance, and the device has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of direct heat exchange equipment and is a portable heater. Background Art

[0002] At present, the domestic chlor-alkali industry generally uses molten salt as a heat source for liquid alkali for heat exchange. The falling film tube of the final concentrator is heated by molten salt to concentrate the alkali solution from 62% to 98%, and finally cooled by the caustic soda flake machine to produce caustic soda flakes (i.e. sodium hydroxide). The molten salt furnace heats the molten salt with natural gas, and the molten salt is stored in the molten salt tank. The molten salt is circulated between the molten salt tank, the molten salt furnace and the final concentrator through the molten salt circulation pump. Usually, the molten salt tank is located at the lowest point of the molten salt circulation system, so that after the molten salt circulation pump stops, the molten salt in the circulation system can flow back to the molten salt tank from a high place under the action of gravity.

[0003] When the production process requires a partial shutdown for regular inspection or a complete shutdown for major overhaul, the molten salt furnace will be shut down and the hot water supply in the production workshop will be stopped. At this time, the molten salt and 98% of the alkali solution will continue to precipitate crystals as the temperature decreases. In addition, due to the water absorption of caustic soda flakes, alkali will accumulate on the caustic soda flake machine during the production process. Usually, the solubility of caustic soda flakes and cooled molten salt increases with the increase of temperature, so using hot water can quickly and effectively remove the alkali in the above-mentioned pipelines and on the production equipment.

[0004] Therefore, the existing alkali production equipment has the following shortcomings during shutdown and maintenance: during the process of stopping to clean the alkali in the pipeline and on the production equipment, the on-site workers lack a device that can quickly generate hot water because the molten salt furnace is shut down. Summary of the invention

[0005] The utility model provides a portable heater, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem that in the process of alkali formation in the existing parking cleaning pipeline and on the production equipment, the on-site workers lack a device that can quickly generate hot water due to the shutdown of the molten salt furnace.

[0006] The technical solution of the utility model is achieved through the following measures: a portable heater, comprising an air intake pipe, a gas-liquid mixing pipe and a jacket, the inner diameter of the air intake pipe decreases from right to left, a jacket capable of accommodating cold water is fixedly installed on the outer side of the middle part of the air intake pipe, the left end of the jacket is aligned with the left end of the air intake pipe, the left end of the jacket is fixedly connected with the right end of the gas-liquid mixing pipe, a flow gap capable of sucking cold water in the jacket into the gas-liquid mixing pipe is formed between the inner side of the right end of the gas-liquid mixing pipe and the outer side of the left end of the air intake pipe, and a water inlet pipe is fixedly connected to the upper side of the right part of the jacket.

[0007] The following are further optimizations and / or improvements to the above utility model technical solution:

[0008] A mixing section capable of accelerating the mixing speed of steam and cold water may be provided on the inner side of the left portion of the above-mentioned gas-liquid mixing tube. The mixing section may include a fixed ring, a cross brace, a support shaft and a mixing impeller. An inner ring groove is provided on the inner side of the left end of the gas-liquid mixing tube. A fixed ring is provided in the inner ring groove. A cross brace is fixedly installed on the inner side of the fixed ring along the diameter direction. A support shaft whose axis coincides with the axis of the gas-liquid mixing tube is fixedly installed on the right side in the middle of the cross brace. At least one mixing impeller capable of rotating by being driven by steam is provided on the outer side of the right portion of the support shaft.

[0009] The above-mentioned jacket may include a right end plate, a circular pipe section and a conical pipe section. The right end plate is fixedly installed on the outer side of the middle part of the air inlet pipe. A circular pipe section with its left end located on the right side of the gas-liquid mixing pipe is screwed on the outer side of the right end plate. The upper side of the right part of the circular pipe section is fixedly connected to the lower end of the water inlet pipe, and a conical pipe section with a smaller left end and a larger right end is fixedly installed between the left end of the circular pipe section and the right end of the gas-liquid mixing pipe.

[0010] The air inlet pipe may be in the shape of a cone with a small left side and a large right side. An air outlet pipe which can be fitted into the gas-liquid mixing pipe may be fixedly installed at the left end of the air inlet pipe, and a flow annulus through which cold water can flow is formed between the outer side of the air outlet pipe and the inner side of the gas-liquid mixing pipe.

[0011] A right connecting flange may be provided on the outer side of the right end of the above-mentioned air inlet pipe, and an insulation layer may be provided on the outer side of the air inlet pipe at a position between the right connecting flange and the right end of the jacket; a left connecting flange may be provided on the outer side of the left end of the gas-liquid mixing pipe, and insulation layers may be provided on the outer side of the gas-liquid mixing pipe and the outer side of the left end of the jacket; an upper connecting flange may be provided on the outer side of the upper end of the water inlet pipe.

[0012] A hand-holding part may be provided from the middle part to the lower side of the right part of the jacket.

[0013] The utility model has a reasonable and compact structure and is easy to use. Through an air inlet pipe whose inner diameter decreases from right to left, the steam can be throttled and depressurized, so that the outflow speed of the steam is much greater than the inflow speed, thereby forming a negative pressure on the right part of the gas-liquid mixing tube, and cold water is sucked into the gas-liquid mixing tube from the jacket and mixed with the steam, so that the steam releases latent heat of vaporization to condense into water, and the cold water absorbs the latent heat of vaporization to heat up, and is quickly and efficiently heated into hot water, thereby ensuring that during the shutdown and maintenance period, the caustic soda flake production workshop still has sufficient hot water to clean the alkali deposits on the production equipment and in the pipelines, and has the characteristics of safety, labor saving, simplicity and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 It is a schematic diagram of the main view and partial cross-section structure of embodiments 1-6 of the utility model.

[0015] The codes in the accompanying drawings are: 1 is an air inlet pipe, 2 is a gas-liquid mixing pipe, 3 is a flow gap, 4 is a water inlet pipe, 5 is a fixing ring, 6 is a cross brace, 7 is a support shaft, 8 is a mixing impeller, 9 is a right end plate, 10 is a circular pipe section, 11 is a conical pipe section, 12 is an air outlet pipe, 13 is a flow annulus, 14 is a right connecting flange, 15 is a heat insulation layer, 16 is a left connecting flange, 17 is a thermal insulation layer, 18 is an upper connecting flange, 19 is a hand-held part, and 20 is a sealing gasket. DETAILED DESCRIPTION

[0016] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0017] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0018] The present invention is further described below in conjunction with the embodiments and drawings:

[0019] Embodiment 1: As attached Figure 1 As shown, the portable heater includes an air intake pipe 1, a gas-liquid mixing pipe 2 and a jacket. The inner diameter of the air intake pipe 1 decreases from right to left. A jacket capable of accommodating cold water is fixedly installed on the outer side of the middle part of the air intake pipe 1. The left end of the jacket is aligned with the left end of the air intake pipe 1, and the left end of the jacket is fixedly connected to the right end of the gas-liquid mixing pipe 2. A flow gap 3 capable of sucking cold water in the jacket into the gas-liquid mixing pipe 2 is formed between the inner side of the right end of the gas-liquid mixing pipe 2 and the outer side of the left end of the air intake pipe 1. A water inlet pipe 4 is fixedly connected to the upper side of the right part of the jacket.

[0020] During use, the structure of the right end of the air intake pipe 1 having a large inner diameter and the left end having a small inner diameter is similar to the nozzle in the prior art. Therefore, when the steam in the air intake pipe 1 flows from right to left to the gas-liquid mixing pipe 2, after being throttled by the air intake pipe 1, the pressure of the steam is reduced and the flow rate is increased after the steam is ejected from the air intake pipe 1, so that the speed of the steam flowing out of the air intake pipe 1 is much greater than the speed of flowing into the air intake pipe 1, which makes the steam able to be ejected from the left end of the air intake pipe 1, so that the outflow speed of the gas in the gas-liquid mixing pipe 2 is increased, and the right end of the gas-liquid mixing pipe 2 is It is connected to the jacket and cannot be supplemented with air intake, which will cause the vacuum degree of the right part of the gas-liquid mixing tube 2 to increase, forming a negative pressure, and the cold water in the jacket is continuously sucked into the gas-liquid mixing tube 2 through the flow gap 3, mixed with the steam, so that the steam releases the latent heat of vaporization and condenses into water, and the cold water absorbs the latent heat of vaporization and heats up, becoming hot water, and flows out from the left end of the gas-liquid mixing tube 2. At this time, it can be collected through a hot water tank according to actual needs, or it can be directly connected to a spray gun to flush the alkali on the flake caustic soda production equipment and in the pipeline. According to demand, the steam in the air intake pipe 1 can be realized by a steam generator in the prior art, or it can come from a thermal power plant used to produce chlorine-alkali.

[0021] The portable heater can be further optimized and / or improved according to actual needs:

[0022] Embodiment 2: As attached Figure 1 As shown, a mixing section capable of accelerating the mixing speed of steam and cold water is provided on the inner side of the left portion of the gas-liquid mixing tube 2, and the mixing section includes a fixed ring 5, a cross brace 6, a support shaft 7 and a mixing impeller 8. An inner ring groove is provided on the inner side of the left end of the gas-liquid mixing tube 2, and a fixed ring 5 is provided in the inner ring groove. A cross brace 6 is fixedly installed on the inner side of the fixed ring 5 along the diameter direction, and a support shaft 7 whose axis coincides with the axis of the gas-liquid mixing tube 2 is fixedly installed on the right side of the middle of the cross brace 6, and at least one mixing impeller 8 capable of rotating by being driven by steam is provided on the outer side of the right portion of the support shaft 7.

[0023] During use, when steam and cold water flow through the mixing impeller 8, the mixing impeller 8 can be driven to rotate, so that a large number of vortices are formed between the steam and the cold water, thereby accelerating the mixing speed of the steam and the cold water, making the steam and the cold water mix more evenly, thereby improving the working efficiency of steam releasing latent heat of vaporization to condense into water, and cold water absorbing latent heat of vaporization to heat up into hot water.

[0024] According to requirements, the fixing ring 5 can be tightened by the connecting end of the pipeline or equipment connected to the gas-liquid mixing tube 2 and the sealing gasket 20. Two semi-arc flow holes can be formed between the cross brace 6 and the fixing ring 5 to allow hot water to flow out of the gas-liquid mixing tube 2. The support shaft 7 and the cross brace 6 can be fixedly installed by means of threaded fasteners, screw connections, rivets, welding, etc.

[0025] Embodiment 3: As attached Figure 1As shown, the jacket includes a right end plate 9, a circular tube section 10 and a conical tube section 11. The right end plate 9 is fixedly installed on the outer side of the middle part of the air inlet pipe 1. The outer side of the right end plate 9 is screwed with a circular tube section 10 whose left end is located on the right side of the gas-liquid mixing pipe 2. The upper right side of the circular tube section 10 is fixedly connected to the lower end of the water inlet pipe 4. A conical tube section 11 with a left small and right large shape is fixedly installed between the left end of the circular tube section 10 and the right end of the gas-liquid mixing pipe 2.

[0026] By such an arrangement, the detachable right end plate 9 can quickly replace and maintain the air intake pipe 1; the cold water containing chamber formed between the right end plate 9, the inner side of the circular tube section 10 and the outer side of the air intake pipe 1 enables sufficient cold water to be stored in the jacket; the conical tube section 11 can form a flow gap 3 with the air intake pipe 1 that is small on the left and large on the right, while having a diversion effect on the cold water, guiding the cold water to enter the gas-liquid mixing tube 2 faster to complete mixing with the steam.

[0027] Embodiment 4: As attached Figure 1 As shown, the air inlet pipe 1 is in the shape of a conical tube with a small left side and a large right side. An air outlet pipe 12 that can be inserted into the gas-liquid mixing pipe 2 is fixedly installed at the left end of the air inlet pipe 1, and a flow annulus 13 is formed between the outer side of the air outlet pipe 12 and the inner side of the gas-liquid mixing pipe 2 to allow cold water to flow.

[0028] By such an arrangement, the wall thickness of the air intake pipe 1 can be made more uniform while ensuring that the inner cavity of the air intake pipe 1 is still a conical cavity with a smaller left side and a larger right side, thereby effectively improving the heat transfer efficiency between steam and cold water, so that the cold water in the jacket can be preliminarily heated during the process of steam flowing through the air intake pipe 1. In addition, the conical air intake pipe 1 can guide the cold water in the outer sleeve, so that the cold water in the jacket can flow into the gas-liquid mixing tube 2 through the flow gap 3 more quickly; under the action of the narrow slit-shaped flow annulus 13, the negative pressure in the gas-liquid mixing tube 2 can better suck the cold water in the jacket into the gas-liquid mixing tube 2 for rapid mixing with the steam.

[0029] Embodiment 5: As attached Figure 1 As shown, a right connecting flange 14 is provided on the outer side of the right end of the air inlet pipe 1, and a heat insulation layer 15 is provided on the outer side of the air inlet pipe 1 at a position between the right connecting flange 14 and the right end of the jacket; a left connecting flange 16 is provided on the outer side of the left end of the gas-liquid mixing pipe 2, and a heat insulation layer 17 is provided on the outer side of the gas-liquid mixing pipe 2 and the outer side of the left end of the jacket; an upper connecting flange 18 is provided on the outer side of the upper end of the water inlet pipe 4.

[0030] This arrangement makes it easier for the air inlet pipe 1, the water inlet pipe 4 and the gas-liquid mixing pipe 2 to be fixedly connected to other pipes through the connecting flanges; the thermal insulation layer 15 can effectively prevent the operators from being scalded by the high temperature of the air inlet pipe 1, and can also greatly reduce the loss of steam heat; the thermal insulation layer 17 can reduce the heat loss in the gas-liquid mixing pipe 2, so that the cold water can absorb the heat in the steam to the maximum extent, and continuously keep the mixed hot water warm.

[0031] Embodiment 6: As attached Figure 1 As shown, a hand-held portion 19 is provided from the middle to the lower right side of the jacket.

[0032] The handheld portion 19 makes it easier to control the device, as well as to transport and carry the device. The handheld portion 19 can be implemented as a U-shaped, rod-shaped, or L-shaped handle, a pull handle, or a folding handle, etc., as required.

[0033] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A portable heater, characterized in that It includes an air intake pipe, a gas-liquid mixing pipe and a jacket. The inner diameter of the air intake pipe decreases from right to left. A jacket capable of accommodating cold water is fixedly installed on the outer side of the middle part of the air intake pipe. The left end of the jacket is aligned with the left end of the air intake pipe. The left end of the jacket is fixedly connected with the right end of the gas-liquid mixing pipe. A flow gap capable of sucking cold water in the jacket into the gas-liquid mixing pipe is formed between the inner side of the right end of the gas-liquid mixing pipe and the outer side of the left end of the air intake pipe. A water inlet pipe is fixedly connected to the upper side of the right part of the jacket.

2. The portable heater according to claim 1, characterized in that A mixing section capable of accelerating the mixing speed of steam and cold water is provided on the inner side of the left portion of the gas-liquid mixing tube, and the mixing section includes a fixed ring, a cross brace, a support shaft and a mixing impeller. An inner ring groove is provided on the inner side of the left end of the gas-liquid mixing tube, a fixed ring is provided in the inner ring groove, a cross brace is fixedly installed on the inner side of the fixed ring along the diameter direction, a support shaft whose axis coincides with the axis of the gas-liquid mixing tube is fixedly installed on the right side in the middle of the cross brace, and at least one mixing impeller capable of rotating by being driven by steam is provided on the outer side of the right portion of the support shaft.

3. The portable heater according to claim 1 or 2, characterized in that The jacket includes a right end plate, a circular pipe section and a conical pipe section. The right end plate is fixedly installed on the outer side of the middle part of the air inlet pipe. A circular pipe section with its left end located on the right side of the gas-liquid mixing pipe is screwed on the outer side of the right end plate. The upper right side of the circular pipe section is fixedly connected to the lower end of the water inlet pipe. A conical pipe section with a left small size and a right large size is fixedly installed between the left end of the circular pipe section and the right end of the gas-liquid mixing pipe.

4. The portable heater according to claim 1 or 2, characterized in that The air inlet pipe is in the shape of a cone with a small left side and a large right side. An air outlet pipe that can be fitted into the gas-liquid mixing pipe is fixedly installed at the left end of the air inlet pipe, and a flow annulus that allows cold water to flow is formed between the outer side of the air outlet pipe and the inner side of the gas-liquid mixing pipe.

5. The portable heater according to claim 3, characterized in that The air inlet pipe is in the shape of a cone with a small left side and a large right side. An air outlet pipe that can be fitted into the gas-liquid mixing pipe is fixedly installed at the left end of the air inlet pipe, and a flow annulus that allows cold water to flow is formed between the outer side of the air outlet pipe and the inner side of the gas-liquid mixing pipe.

6. The portable heater according to claim 1, 2 or 5, characterized in that A right connecting flange is provided on the outer side of the right end of the air inlet pipe, and an insulation layer is provided on the outer side of the air inlet pipe between the right connecting flange and the right end of the jacket; a left connecting flange is provided on the outer side of the left end of the gas-liquid mixing pipe, and insulation layers are provided on the outer side of the gas-liquid mixing pipe and the outer side of the left end of the jacket; an upper connecting flange is provided on the outer side of the upper end of the water inlet pipe.

7. The portable heater according to claim 3, characterized in that A right connecting flange is provided on the outer side of the right end of the air inlet pipe, and an insulation layer is provided on the outer side of the air inlet pipe between the right connecting flange and the right end of the jacket; a left connecting flange is provided on the outer side of the left end of the gas-liquid mixing pipe, and insulation layers are provided on the outer side of the gas-liquid mixing pipe and the outer side of the left end of the jacket; an upper connecting flange is provided on the outer side of the upper end of the water inlet pipe.

8. The portable heater according to claim 4, characterized in that A right connecting flange is provided on the outer side of the right end of the air inlet pipe, and an insulation layer is provided on the outer side of the air inlet pipe between the right connecting flange and the right end of the jacket; a left connecting flange is provided on the outer side of the left end of the gas-liquid mixing pipe, and insulation layers are provided on the outer side of the gas-liquid mixing pipe and the outer side of the left end of the jacket; an upper connecting flange is provided on the outer side of the upper end of the water inlet pipe.

9. The portable heater according to claim 1 or 2 or 5 or 7 or 8, characterized in that A hand-holding part is arranged from the middle part to the lower right side of the jacket.

10. The portable heater according to claim 6, characterized in that A hand-holding part is arranged from the middle part to the lower right side of the jacket.

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