Heating system
By using preheating devices and heating devices to perform multiple heating of ammonium sulfate + ammonium carbonate mixed solution in the desulfurization ash wet solid waste process, the existing heating system has solved the problems of low heating efficiency, high energy consumption, high cost and safety hazards, and achieved efficient and energy-saving heating effect.
Patent Information
- Application Number
- CN202421492949.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The existing heating systems have problems of low heating efficiency, high energy consumption, high cost and safety hazards in the desulfurization ash wet solid waste process.
A heating system is used, which includes a preheating device and a heating device. The preheating device preheats the mixed solution of ammonium sulfate + ammonium carbonate through the first heating device, and the temperature rises to above 50°C. The second inner cavity of the heating device contains the slurry unloaded from the reactor, and heat exchanges with the slurry in the second inner cavity through the upper liquid tube, and further heats the solution to increase the temperature by more than 5°C.
It realizes efficient utilization of heat energy, significantly saves energy, reduces carbon emissions, reduces production costs, and improves heating efficiency.
Smart Images
Figure CN222816813U_ABST
Abstract
Description
Technical Field
[0001] The present application is used in the field of reaction solution heating, and in particular relates to a heating system. Background Art
[0002] In the wet solid waste process of desulfurized ash, slaked lime is added to the ammonium sulfate solution to recover ammonia and synthesize calcium sulfate, and the ammonia is recycled. Since the ammonium sulfate solution is mixed with some ammonium carbonate, the solution needs to be heated to above 80 degrees to completely decompose the ammonium carbonate and allow carbon dioxide and ammonia to escape. Commonly used reactor heating methods are usually the following:
[0003] 1. Electric heating: One of the common heating methods is to install electric heaters around the reactor and heat it under the action of electric current.
[0004] 2. Steam heating: The reactor is heated by introducing steam or hot water, usually by installing steam or hot water pipes outside the reactor.
[0005] 3. Oil bath heating: Place the reactor in an oil bath filled with heating oil, and heat the reactor by transferring heat from the oil bath to the reactor for heating.
[0006] 4. Water bath heating: Place the reactor in a water bath filled with hot water and heat the reactor through heat transfer of water.
[0007] Among the above methods, electric heating requires the use of power and appropriate protection measures for the circuit, which poses certain safety hazards and energy waste. The energy efficiency of electric heating is low, which will lead to energy waste and increase costs. Steam heating requires additional equipment, which increases equipment and maintenance costs, has high energy consumption, and is difficult to control temperature. The adjustment response speed is slow, and there are certain safety hazards. Steam heating involves a high-temperature and high-pressure steam system, which poses certain safety risks. Water bath heating also has the problems of low heating efficiency and high energy consumption. Utility Model Content
[0008] The purpose of the present application is to solve at least one of the technical problems existing in the prior art and to provide a heating system with high heating efficiency and low cost.
[0009] The technical solution adopted by this application to solve its technical problem is:
[0010] A heating system, comprising:
[0011] A preheating device, the preheating device having a first inner cavity, the preheating device comprising a first heating device, the heating device being located in the first inner cavity;
[0012] A reactor, wherein the reactor has a reaction chamber;
[0013] an upper liquid pipe, wherein a liquid inlet end of the upper liquid pipe is connected to the first inner cavity, and a liquid outlet end of the upper liquid pipe is connected to the reaction chamber;
[0014] A heating device having a second inner cavity for containing liquid, at least a portion of the upper liquid pipe is located below the liquid level in the heating device.
[0015] In certain embodiments of the present application, the preheating device includes a water tank, the first inner cavity is formed in the water tank, a first liquid inlet is provided on the water tank, a first liquid outlet is provided at the bottom of the water tank, and the end of the upper liquid pipe is connected to the water tank through the first liquid outlet.
[0016] In certain embodiments of the present application, the first heating device includes a first heating coil for introducing kiln gas, one end of the first heating coil forms a first air inlet above the water tank, and the other end of the first heating coil forms a first air outlet above the water tank.
[0017] In certain embodiments of the present application, the heating device is located between the preheating device and the reactor, and the heating device includes a heating pool, in which the second inner cavity is formed, and the slurry unloaded from the reactor is arranged in the second inner cavity.
[0018] In certain embodiments of the present application, a second liquid inlet communicating with the reaction chamber is provided on the top of the reactor, and the upper liquid pipe is communicated with the reactor through the second liquid inlet.
[0019] In certain embodiments of the present application, a water pump is installed on the upper liquid pipe, and the water pump is located at one end close to the second liquid inlet.
[0020] In certain embodiments of the present application, a second heating device is provided in the reactor, the second heating device is located in the reaction chamber, the second heating device includes a second heating coil, one end of the second heating coil extends to the top of the reactor to form a second air inlet, and the other end of the second heating coil forms a second air outlet above the reactor.
[0021] In certain embodiments of the present application, the reactor includes a jacket disposed on the periphery of the reaction chamber, and the jacket has a third inner cavity.
[0022] In certain embodiments of the present application, the reactor is provided with an air inlet pipe communicating with the third inner cavity, and the air inlet pipe is used to introduce kiln gas.
[0023] In certain embodiments of the present application, a discharge pipe is provided between the reactor and the heating device, a second liquid outlet connected to the reaction chamber is opened at the bottom of the reactor, one end of the discharge pipe is connected to the reaction chamber through the second liquid outlet, and the other end of the discharge pipe is connected to the second inner cavity.
[0024] One of the above technical solutions has at least one of the following advantages or beneficial effects: the preheating device of the heating system preheats the mixed solution of ammonium sulfate + ammonium carbonate in the first inner cavity through the first heating device, so that the temperature of the ammonium sulfate + ammonium carbonate solution rises to above 50°C; the second inner cavity of the heating device is filled with slurry (temperature close to 80°C) unloaded from the reactor. Since at least a part of the upper liquid pipe is located below the liquid level in the heating device, the upper liquid pipe immersed in the liquid in the heating device can exchange heat with the slurry in the second inner cavity, so as to further heat the mixed solution of ammonium sulfate + ammonium carbonate and increase its temperature by more than 5°C; the upper liquid pipe transports the mixed solution of ammonium sulfate + ammonium carbonate to the reactor for chemical reaction. The heating system adopts a combination of multiple heating methods of the preheating device and the heating device to heat the solution before the reaction, thereby realizing efficient utilization of thermal energy, significantly saving energy, reducing carbon emissions, and saving production costs.
[0025] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0027] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application. DETAILED DESCRIPTION
[0028] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.
[0029] In the present application, if there is a description of directions (up, down, left, right, front and back), it is only for the convenience of describing the technical solution of the present application, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.
[0030] In this application, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of this application, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0031] In this application, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected, detachably connected, or integrally formed; they can be mechanically connected, electrically connected, or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in this application in combination with the specific content of the technical solution.
[0032] Wet carbon fixation, also known as wet carbon fixation technology, is a technology that captures carbon dioxide from lime kiln gas and utilizes it by absorbing it in a solution state with alkaline substances such as ammonia and calcium hydroxide.
[0033] The embodiment of the present application provides a heating system, see Figure 1 ,include:
[0034] The preheating device 100 has a first inner cavity 110, and the preheating device 100 includes a first heating device 120, and the heating device 400 is located in the first inner cavity 110;
[0035] A reaction vessel 200, wherein the reaction vessel 200 has a reaction chamber 210;
[0036] An upper liquid pipe 300, wherein a liquid inlet end of the upper liquid pipe 300 is connected to the first inner cavity 110, and a liquid outlet end of the upper liquid pipe 300 is connected to the reaction chamber 210;
[0037] The heating device 400 has a second inner cavity 410 for containing liquid, and at least a portion of the upper liquid pipe 300 is located below the liquid level in the heating device 400 .
[0038] The preheating device 100 of the heating system preheats the mixed solution of ammonium sulfate + ammonium carbonate in the first inner cavity 110 through the first heating device 120, so that the temperature of the ammonium sulfate + ammonium carbonate solution rises to above 50°C; the second inner cavity 410 of the heating device 400 is filled with the slurry (temperature close to 80°C) unloaded from the reactor 200. Since at least a part of the upper liquid pipe 300 is located below the liquid level in the heating device 400, the upper liquid pipe immersed in the liquid of the heating device can exchange heat with the slurry in the second inner cavity 410 to further heat the mixed solution of ammonium sulfate + ammonium carbonate and increase its temperature by more than 5°C; the upper liquid pipe 300 transports the mixed solution of ammonium sulfate + ammonium carbonate to the reactor 200 for chemical reaction. The heating system adopts a combination of a preheating device and a heating device to perform multiple heating methods on the solution before the reaction, thereby realizing efficient utilization of thermal energy, significantly saving energy, reducing carbon emissions, and saving production costs.
[0039] In some embodiments, the preheating device 100 includes a water tank 130, a first inner cavity 110 is formed in the water tank 130, a first liquid inlet 131 is provided on the water tank 130, a first liquid outlet 132 is provided at the bottom of the water tank 130, and the end of the upper liquid pipe 300 is connected to the water tank 130 through the first liquid outlet 132.
[0040] See also Figure 1 The first heating device 120 includes a first heating coil 133 for introducing kiln gas, one end of the first heating coil 133 forms a first air inlet 131 above the water tank 130, and the other end of the first heating coil 133 forms a first air outlet 132 above the water tank 130. The first heating coil 133 can achieve large-area heating of the solution in the first inner cavity 110, and can make the solution heated evenly to avoid local overheating; and the first heating coil 133 has a high heat transfer efficiency, so that the solution in the first inner cavity 110 is quickly heated and heated, and has low energy consumption and low cost; it is installed inside the container, saving external space, reducing the risk of external heating equipment, and has good safety; the heating of the first heating coil 133 can more accurately control the heating temperature. It can be understood that the first heating device 120 can be replaced by an electric heating rod, an electric heating plate, a heat exchanger, etc. to achieve heating of the solution.
[0041] In some embodiments, the heating device 400 is located between the preheating device 100 and the reactor 200. The heating device 400 includes a heating pool 420. A second inner cavity 410 is formed in the heating pool 420. The second inner cavity 410 is provided with slurry unloaded from the reactor 200, so that the overall structure of the heating system is compact and the layout is reasonable.
[0042] See also Figure 1A second liquid inlet 211 communicating with the reaction chamber 210 is provided on the top of the reactor 200. The upper liquid pipe 300 is communicated with the reactor 200 through the second liquid inlet 211. The upper liquid pipe 300 is made of a heat-conducting and non-corrosive material, which is convenient for heat conduction and will not be corroded by the solution, such as stainless steel: with good thermal conductivity and corrosion resistance, copper: excellent thermal conductivity and good corrosion resistance, aluminum nitride: with both good thermal conductivity and corrosion resistance, etc.
[0043] See also Figure 1 A water pump 310 is installed on the upper liquid pipe 300. The water pump 310 is located at one end close to the second liquid inlet 211. The water pump 310 can introduce the solution in the first inner cavity 110 into the reactor 200, so as to realize rapid, stable and large-scale transportation of the mixed solution of ammonium sulfate + ammonium carbonate. The water pump 310 is easy to operate and maintain, has high reliability and stability, has a compact structure, and occupies little space.
[0044] See also Figure 1 , the reactor 200 is provided with a second heating device 220, which is located in the reaction chamber 210. The second heating device 220 includes a second heating coil 223, one end of which extends to the top of the reactor 200 to form a second air inlet 221, and the other end of the second heating coil 223 forms a second air outlet 222 above the reactor 200. The use of the second heating coil 233 can achieve large-area heating of the ammonium sulfate + ammonium carbonate mixed solution in the reaction chamber 210, and can make the solution heated evenly to avoid local overheating; and the second heating coil 233 has a high heat transfer efficiency, so that the solution in the reaction chamber 210 is quickly heated and heated, and has low energy consumption and low cost; it is installed inside the container, saving external space, reducing the risk of external heating equipment, and has good safety; the heating of the second heating coil 233 can more accurately control the heating temperature. It can be understood that the first heating device 120 can be replaced by an electric heating rod, an electric heating plate, a heat exchanger, etc. to achieve heating of the solution.
[0045] In some embodiments, the reactor 200 includes a jacket 230 arranged on the periphery of the reaction chamber 210, the jacket 230 has a third inner cavity 231, and the material in the reactor is heated by the heat transfer medium (such as steam, heat transfer oil, etc.) in the jacket 230 to achieve the required reaction temperature. The jacket 230 can keep the reaction solution in the reactor 200 warm; and the jacket 230 can reduce the heat exchange between the material in the reactor 200 and the external environment, and maintain the stability of the reaction temperature; the design of the jacket 230 can increase the heat transfer area, improve the heat transfer efficiency, and enable the material in the reactor 200 to reach the required temperature faster; at the same time, the jacket 230 can prevent the reactor 200 from external corrosion and wear, thereby extending the service life of the reactor.
[0046] The reactor 200 is provided with an air inlet pipe 240 connected with the third inner cavity 231. The air inlet pipe 240 is used to introduce kiln gas. The air inlet pipe 240 is used to introduce lime kiln gas for heating and heat preservation. The waste heat of the lime kiln gas is effectively used to heat the reactor, so that the temperature of the ammonium sulfate + ammonium carbonate mixed solution is quickly raised to above 80°C. At this time, the ammonium carbonate has been completely decomposed into carbon dioxide and ammonia. The mixed gas is recovered and recycled through the Roots blower.
[0047] In some embodiments, a discharge pipe 500 is provided between the reactor 200 and the heating device 400. A second liquid outlet 212 connected to the reaction chamber 210 is provided at the bottom of the reactor 200 to facilitate the discharge of the liquid in the reactor 200. One end of the discharge pipe 500 is connected to the reaction chamber 210 through the second liquid outlet 212, and the other end of the discharge pipe 500 is connected to the second inner cavity 410. After the reaction is completed, the temperature of the slurry is discharged into the heating pool 420 through the discharge pipe 500, so as to preheat the next batch of ammonium sulfate + ammonium carbonate mixed solution.
[0048] The heating system utilizes the waste heat of kiln gas and the heat storage of reaction solution to heat the solution before the reaction, achieving efficient utilization of thermal energy, increasing thermal efficiency by 60%, saving energy by 80%, and reducing production costs by more than 10%.
[0049] In the description of this specification, the description with reference to the terms "example", "embodiment" or "some embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0050] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present application, and these equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.
Claims
1. A heating system, characterized in that: include: A preheating device, the preheating device having a first inner cavity, the preheating device comprising a first heating device, the heating device being located in the first inner cavity; A reactor, wherein the reactor has a reaction chamber; an upper liquid pipe, wherein a liquid inlet end of the upper liquid pipe is connected to the first inner cavity, and a liquid outlet end of the upper liquid pipe is connected to the reaction chamber; A heating device having a second inner cavity for containing liquid, at least a portion of the upper liquid pipe is located below the liquid level in the heating device.
2. The heating system according to claim 1, characterized in that: The preheating device comprises a water tank, the first inner cavity is formed in the water tank, a first liquid inlet is arranged on the water tank, a first liquid outlet is arranged at the bottom of the water tank, and the end of the upper liquid pipe is connected to the water tank through the first liquid outlet.
3. The heating system according to claim 2, characterized in that: The first heating device comprises a first heating coil for introducing kiln gas, one end of the first heating coil forms a first air inlet above the water tank, and the other end of the first heating coil forms a first air outlet above the water tank.
4. The heating system according to claim 1, characterized in that: The heating device is located between the preheating device and the reactor, and includes a heating pool. The second inner cavity is formed in the heating pool, and the slurry unloaded from the reactor is arranged in the second inner cavity.
5. The heating system according to claim 4, characterized in that A second liquid inlet communicating with the reaction chamber is provided on the top of the reactor, and the upper liquid pipe is communicated with the reactor through the second liquid inlet.
6. The heating system according to claim 5, characterized in that A water pump is installed on the upper liquid pipe, and the water pump is located at one end close to the second liquid inlet.
7. The heating system according to claim 1, characterized in that: A second heating device is provided in the reactor, and the second heating device is located in the reaction chamber. The second heating device includes a second heating coil, one end of the second heating coil extends to the top of the reactor to form a second air inlet, and the other end of the second heating coil forms a second air outlet above the reactor.
8. The heating system according to claim 1, characterized in that: The reactor comprises a jacket arranged on the periphery of the reaction chamber, and the jacket has a third inner chamber.
9. The heating system according to claim 8, characterized in that The reactor is provided with an air inlet pipe which is in communication with the third inner cavity, and the air inlet pipe is used for introducing kiln gas.
10. The heating system according to claim 1, characterized in that A discharge pipe is provided between the reactor and the heating device, a second liquid outlet connected to the reaction chamber is provided at the bottom of the reactor, one end of the discharge pipe is connected to the reaction chamber through the second liquid outlet, and the other end of the discharge pipe is connected to the second inner cavity.