Sulfur acid-making low-temperature waste heat recovery device
By using a preheating and stirring mechanism in the sulfuric acid production process, the problem of low combustion efficiency caused by low temperature during sulfuric acid production is solved, achieving efficient waste heat recovery and unblocking of the feed pipe, thus improving the overall efficiency of sulfuric acid production.
Patent Information
- Application Number
- CN202422653171.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In existing technologies, sulfur is directly fed into a sulfur incinerator during sulfur production, resulting in low combustion temperature, low incineration efficiency, and long combustion time.
A preheating mechanism including a sulfur incinerator and a sulfur storage tank is adopted. The sulfur is preheated by heat exchange through heat pipes, and the sulfur is stirred by the rotating shaft and stirring components of the stirring mechanism to promote uniform heating of the sulfur.
It improves the combustion efficiency of sulfuric acid production, reduces the possibility of feed pipe blockage, and effectively recovers waste heat.
Smart Images
Figure CN223499576U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of waste heat recovery devices, and in particular to a low-temperature waste heat recovery device for sulfuric acid production. Background Technology
[0002] In the production of sulfuric acid from various sulfur-containing raw materials, the three main processes—combustion of the sulfur-containing raw materials, oxidation of sulfur dioxide, and absorption of sulfur trioxide—all release a large amount of chemical energy. The utilization of high- and medium-temperature waste heat generated during the combustion of sulfur-containing raw materials and oxidation of sulfur dioxide has relatively mature technology. During the drying and absorption processes in sulfuric acid plants, a large amount of reaction heat, condensation heat, and dilution heat are generated. With the increasing prominence of international energy issues, how to efficiently use energy, recover various waste heat sources, and reduce environmental pollution from heat emissions has become a focus of attention.
[0003] Currently, some sulfur is directly burned in a sulfur incinerator during acid production. However, the sulfur temperature is low and the combustion time is long, which can easily affect the combustion efficiency. Therefore, we propose a low-temperature waste heat recovery device for sulfuric acid production to address the aforementioned problems. Utility Model Content
[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.
[0005] Therefore, the purpose of this utility model is to provide a low-temperature waste heat recovery device for sulfuric acid production, which can solve the problem that some sulfur is directly fed into the sulfur incinerator for combustion during the existing sulfuric acid production process. At this time, the temperature of sulfur is low and the combustion time of sulfur is long, which can easily affect the combustion efficiency of sulfur.
[0006] To solve the above-mentioned technical problems, this utility model provides a low-temperature waste heat recovery device for sulfuric acid production, which adopts the following technical solution: it includes a preheating mechanism, which includes a sulfur combustion furnace and a sulfur storage tank. A heat-conducting pipe is fixedly sleeved on the outer wall of the sulfur storage tank. The heat-conducting pipe is in contact with the outer wall of the sulfur storage tank for heat exchange. One end of the heat-conducting pipe is fixedly inserted into the outer wall of the sulfur combustion furnace. The sulfur storage tank and the sulfur combustion furnace are connected by a conveying pipe.
[0007] The stirring mechanism includes a vertically arranged rotating shaft inside a sulfur storage tank. Both ends of the rotating shaft pass through the sulfur storage tank and are inserted into a heat-conducting pipe and fixedly connected to blades. Several stirring components are arranged vertically in a straight line at equal intervals on the outer wall of the rotating shaft.
[0008] By adopting the above technical solution, this solution stores sulfur in a sulfur storage tank and supplies sulfur to the sulfur incinerator. When the sulfur incinerator burns sulfur, the waste heat in the sulfur incinerator is discharged through a heat pipe. When the waste heat is discharged, the sulfur in the sulfur storage tank is heated through heat exchange, thereby preheating the sulfur.
[0009] Optionally, a feed pipe is fixedly inserted into the top of the sulfur storage tank. The feed pipe includes a conical pipe and a vertical pipe. The vertical pipe is fixedly inserted into the top of the sulfur storage tank, and the conical pipe is fixedly installed at the upper end of the vertical pipe.
[0010] By adopting the above technical solution, this solution allows operators to easily add sulfur into the sulfur storage tank for storage via the feed pipe.
[0011] Optionally, a fixing component is fixedly installed inside the vertical pipe, and a drain rod is vertically inserted into the top of the fixing component. A spring is fixedly sleeved on the drain rod, and the lower end of the spring is fixedly connected to the fixing component. Several cams are provided on the uppermost stirring component. When the rotating shaft drives the stirring component to rotate, the cams abut against the lower end of the drain rod and push the drain rod upward.
[0012] By adopting the above technical solution, when the rotating shaft drives the stirring rod to rotate, the cam abuts against the lower end of the unblocking rod and pushes the unblocking rod to move upward. When the unblocking rod moves upward, the spring is stretched and deformed. When the cam separates from the unblocking rod, the spring contracts and deforms and pulls the unblocking rod downward. This process is repeated continuously to unblock the sulfur in the feed pipe.
[0013] Optionally, the fixing component includes a ring and a plurality of connecting rods, the plurality of connecting rods being circumferentially distributed on the outer wall of the ring, and the ends of the plurality of connecting rods away from the ring being fixedly connected to the inner wall of the vertical pipe, the unblocking rod being vertically inserted into the ring.
[0014] By adopting the above technical solution, this solution uses several connecting rods to facilitate fixing the ring inside the feed pipe, and the ring facilitates the assembly of the unblocking rod.
[0015] Optionally, the unblocking rod includes a vertical rod and two diagonal rods, with the two diagonal rods supporting each other at the upper end of the vertical rod. A semicircular block is fixedly sleeved on the vertical rod, and the semicircular block is connected to a ring by a spring, which is sleeved on the vertical rod.
[0016] By adopting the above technical solution, when the rotating shaft drives the stirring component to rotate, the cam abuts against the lower end of the vertical rod and pushes the vertical rod and the two inclined rods to move upward. When the vertical rod drives the semicircular block to move upward, the spring is stretched and deformed. When the cam separates from the vertical rod, the spring contracts and deforms and pulls the semicircular block, the vertical rod and the two inclined rods to move downward.
[0017] Optionally, the heat-conducting pipe includes an outlet pipe and a spiral pipe. One end of the outlet pipe is fixedly inserted into the outer wall of the sulfur incinerator, and the other end of the outlet pipe is fixedly connected to the spiral pipe. The spiral pipe is spirally wound around the outer wall of the sulfur storage tank.
[0018] By adopting the above technical solution, when the heat flow passes through the heat pipe, the heat flow exchanges heat with the sulfur storage tank, and the sulfur in the sulfur storage tank can be preheated by the heat flow.
[0019] Optionally, the sulfur storage tank includes a tank body and several support columns. The support columns are arranged in a rectangular pattern at the bottom of the tank body, and a flow collection hood is fixedly fitted on the outer wall of the support columns. The flow collection hood is located below the tank body.
[0020] By adopting the above technical solution, the tank can be easily supported by several pillars. When the waste heat in the heat pipe is exchanged, the surface of the heat pipe is easily condensed into water. At this time, the condensate dripping from the heat pipe can be collected by the condensate collection hood.
[0021] Optionally, the stirring component includes a plurality of stirring rods, which are arranged in a circular pattern on a rotating shaft and are disposed inside a sulfur storage tank.
[0022] By adopting the above technical solution, when the rotating shaft rotates, it drives several stirring rods to rotate. At this time, the stirring rods can stir the sulfur, thereby promoting the sulfur in the sulfur storage tank to be heated evenly.
[0023] In summary, the present invention has at least one of the following beneficial effects: 1. When the waste heat is discharged, the sulfur in the sulfur storage tank is heated by heat exchange, and when the heat flow passes through the heat pipe, it drives the paddle and the rotating shaft to rotate. Subsequently, the rotating shaft drives the stirring element to rotate and stir the sulfur, thereby promoting the sulfur to be heated. The preheated sulfur is burned faster in the subsequent process, so the efficiency of sulfur acid production is higher.
[0024] 2. When the rotating shaft drives the stirring rod to rotate, the cam abuts against the lower end of the unblocking rod and pushes the unblocking rod upward. Then, the unblocking rod is pulled downward by the spring contraction and deformation. This process is repeated to continuously unblock the sulfur in the feed pipe, thereby reducing the possibility of the feed pipe becoming blocked when the operator adds sulfur. Attached Figure Description
[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0027] Figure 2 This is a partial three-dimensional structural cross-sectional view of the present invention;
[0028] Figure 3 This is a partial three-dimensional unfolded cross-sectional view of the present invention.
[0029] Explanation of reference numerals in the attached drawings: 100, preheating mechanism; 101, sulfur incinerator; 102, sulfur storage tank; 102a, tank body; 102b, support column; 102c, manifold; 103, heat conduction pipe; 103a, exhaust pipe; 103b, spiral pipe; 104, conveying pipe; 105, feed pipe; 105a, conical pipe; 105b, vertical pipe; 105c, fixing component; 105c1, ring; 105c2, connecting rod; 105d, unblocking rod; 105d1, vertical rod; 105d2, diagonal rod; 105d3, semicircular block; 105e, spring;
[0030] 200, stirring mechanism; 201, rotating shaft; 202, impeller; 203, stirring component; 203a, cam. Detailed Implementation
[0031] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in further detail below.
[0032] Example 1, refer to Figure 1-3 In this embodiment, to address the problem that some sulfur is directly fed into the sulfur incinerator for combustion during acid production, resulting in low sulfur temperature and long combustion time, thus affecting combustion efficiency, this invention discloses a low-temperature waste heat recovery device for sulfuric acid production.
[0033] The system includes a preheating mechanism 100, which comprises a sulfur incinerator 101 and a sulfur storage tank 102. A heat-conducting pipe 103 is fixedly sleeved on the outer wall of the sulfur storage tank 102. The heat-conducting pipe 103 is in contact with the outer wall of the sulfur storage tank 102 for heat exchange. When the sulfur incinerator 101 burns sulfur, the residual heat in the sulfur incinerator 101 is discharged through the heat-conducting pipe 103. When the residual heat is discharged, the sulfur in the sulfur storage tank 102 is heated through heat exchange, thereby preheating the sulfur.
[0034] One end of the heat pipe 103 is fixedly inserted into the outer wall of the sulfur incinerator 101. The heat pipe 103 includes an outlet pipe 103a and a spiral pipe 103b. One end of the outlet pipe 103a is fixedly inserted into the outer wall of the sulfur incinerator 101, and the other end of the outlet pipe 103a is fixedly connected to the spiral pipe 103b. The spiral pipe 103b is spirally wound around the outer wall of the sulfur storage tank 102. When the heat flow passes through the heat pipe 103, the heat flow exchanges heat with the sulfur storage tank 102. At this time, the sulfur in the sulfur storage tank 102 can be preheated by the heat flow.
[0035] The sulfur storage tank 102 is connected to the sulfur incinerator 101 via a conveying pipe 104. The sulfur is stored in the sulfur storage tank 102 and supplied to the sulfur incinerator 101 via the conveying pipe 104.
[0036] The stirring mechanism 200 includes a vertically arranged rotating shaft 201 inside the sulfur storage tank 102. Both ends of the rotating shaft 201 pass through the sulfur storage tank 102 and are inserted into the heat conduction pipe 103 and fixedly connected to the blades 202. When the heat flow passes through the heat conduction pipe 103, it drives the blades 202 and the rotating shaft 201 to rotate. Subsequently, the rotating shaft 201 drives the stirring component 203 to rotate and stir the sulfur, thereby promoting the sulfur to be heated.
[0037] A number of stirring components 203 are arranged vertically in a straight line at equal intervals on the outer wall of the rotating shaft 201. The stirring components 203 include a number of stirring rods, which are arranged in a circular pattern on the rotating shaft 201. The stirring rods are located inside the sulfur storage tank 102. When the rotating shaft 201 rotates, it drives the stirring rods to rotate. At this time, the stirring rods can stir the sulfur, thereby promoting the uniform heating of the sulfur in the sulfur storage tank 102, which facilitates the acceleration of the subsequent sulfur combustion efficiency.
[0038] The specific working principle is as follows: sulfur is stored in the sulfur storage tank 102 and supplied to the sulfur incinerator 101. When the sulfur incinerator 101 burns the sulfur, the waste heat in the sulfur incinerator 101 is discharged through the heat pipe 103. When the waste heat is discharged, the sulfur in the sulfur storage tank 102 is heated through heat exchange, thereby preheating the sulfur. When the heat flow passes through the heat pipe 103, it drives the paddle 202 and the rotating shaft 201 to rotate. Subsequently, the rotating shaft 201 drives the stirring element 203 to rotate and stir the sulfur, thereby promoting the sulfur to be heated. The preheated sulfur is burned faster in the subsequent process, so the efficiency of sulfur to acid production is higher.
[0039] Example 2, refer to Figure 2-3 In this embodiment, to address the problem that some existing devices easily clog the feed pipe when adding too much sulfur at once, based on the same concept as in Embodiment 1 above, this low-temperature waste heat recovery device for sulfuric acid production further includes:
[0040] A feed pipe 105 is fixedly inserted into the top of the sulfur storage tank 102. The feed pipe 105 includes a conical pipe 105a and a vertical pipe 105b. The vertical pipe 105b is fixedly inserted into the top of the sulfur storage tank 102, and the conical pipe 105a is fixedly installed at the upper end of the vertical pipe 105b. The feed pipe 105 facilitates the operator to put sulfur into the sulfur storage tank 102 for storage, and the conical pipe 105a reduces the possibility of sulfur spilling when the operator adds sulfur.
[0041] A fixing member 105c is fixedly installed inside the vertical pipe 105b. A drain rod 105d is vertically inserted into the top of the fixing member 105c. A spring 105e is fixedly sleeved on the drain rod 105d. The lower end of the spring 105e is fixedly connected to the fixing member 105c. Several cams 203a are provided on the uppermost stirring member 203. When the rotating shaft 201 drives the stirring member 203 to rotate, the cams 203a abut against the lower end of the drain rod 105d and push the drain rod 105d upward. When the rotating shaft 201 drives the stirring rod to rotate, the cam 203a abuts against the lower end of the unblocking rod 105d and pushes the unblocking rod 105d upward. When the unblocking rod 105d moves upward, the spring 105e stretches and deforms. When the cam 203a separates from the unblocking rod 105d, the spring 105e contracts and deforms and pulls the unblocking rod 105d downward. This process is repeated continuously to unblock the sulfur in the feed pipe 105, thereby reducing the possibility of blockage in the feed pipe 105 when the operator adds sulfur.
[0042] The fastener 105c includes a ring 105c1 and several connecting rods 105c2. The connecting rods 105c2 are circumferentially distributed on the outer wall of the ring 105c1. The ends of the connecting rods 105c2 away from the ring 105c1 are fixedly connected to the inner wall of the vertical pipe 105b. The unblocking rod 105d is vertically inserted into the ring 105c1. The ring 105c1 is fixed in the feed pipe 105 by the cooperation of the connecting rods 105c2, and the unblocking rod 105d is assembled by the ring 105c1.
[0043] The unblocking rod 105d includes a vertical rod 105d1 and two inclined rods 105d2. The two inclined rods 105d2 are supported on the upper end of the vertical rod 105d1. A semi-circular block 105d3 is fixedly sleeved on the vertical rod 105d1. The semi-circular block 105d3 is connected to the ring 105c1 by a spring 105e. The spring 105e is sleeved on the vertical rod 105d1. When the rotating shaft 201 drives the stirring component 203 to rotate, the cam 203a and the vertical rod 105d1... The lower end of 05d1 abuts against and pushes the vertical rod 105d1 and the two inclined rods 105d2 upward. When the vertical rod 105d1 drives the semicircular block 105d3 upward, the spring 105e stretches and deforms. When the cam 203a separates from the vertical rod 105d1, the spring 105e contracts and deforms, pulling the semicircular block 105d3, the vertical rod 105d1 and the two inclined rods 105d2 downward. This process is repeated continuously to clear the sulfur in the feed pipe 105.
[0044] The specific working principle is as follows: When the rotating shaft 201 drives the stirring rod to rotate, the cam 203a abuts against the lower end of the unblocking rod 105d and pushes the unblocking rod 105d upward. When the unblocking rod 105d moves upward, the spring 105e stretches and deforms. When the cam 203a separates from the unblocking rod 105d, the spring 105e contracts and deforms and pulls the unblocking rod 105d downward. This process is repeated continuously to unblock the sulfur in the feed pipe 105, thereby reducing the possibility of blockage in the feed pipe 105 when the operator adds sulfur.
[0045] Example 3, referring to Figure 1 In this embodiment, to address the problem that some existing preheating recovery devices easily generate condensate during heat exchange, which then drips onto the ground, based on the same concept as in Embodiment 1, this low-temperature waste heat recovery device for sulfuric acid production further includes:
[0046] The sulfur storage tank 102 includes a tank body 102a and several support columns 102b. The support columns 102b are arranged in a rectangular shape at the bottom of the tank body 102a. A flow collector 102c is fixedly fitted on the outer wall of the support columns 102b. The flow collector 102c is located below the tank body 102a. The support columns 102b facilitate the support of the tank body 102a.
[0047] The specific working principle is as follows: when the residual heat in the heat pipe 103 undergoes heat exchange, the surface of the heat pipe 103 is prone to condensation into water. At this time, the condensate dripping from the heat pipe 103 can be collected through the collector shroud 102c.
[0048] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.
Claims
1. A low-temperature waste heat recovery device for sulfuric acid production, characterized in that: include, The preheating mechanism (100) includes a sulfur combustion furnace (101) and a sulfur storage tank (102). A heat-conducting pipe (103) is fixedly sleeved on the outer wall of the sulfur storage tank (102). The heat-conducting pipe (103) is in contact with the outer wall of the sulfur storage tank (102) for heat exchange. One end of the heat-conducting pipe (103) is fixedly inserted into the outer wall of the sulfur combustion furnace (101). The sulfur storage tank (102) and the sulfur combustion furnace (101) are connected by a conveying pipe (104). The stirring mechanism (200) includes a rotating shaft (201) vertically arranged inside a sulfur storage tank (102). Both ends of the rotating shaft (201) pass through the sulfur storage tank (102) and are inserted into a heat-conducting pipe (103) and fixedly connected to a blade (202). Several stirring components (203) are arranged vertically in a straight line at equal intervals on the outer wall of the rotating shaft (201).
2. The low-temperature waste heat recovery device for sulfuric acid production according to claim 1, characterized in that: A feed pipe (105) is fixedly inserted into the top of the sulfur storage tank (102). The feed pipe (105) includes a conical pipe (105a) and a vertical pipe (105b). The vertical pipe (105b) is fixedly inserted into the top of the sulfur storage tank (102), and the conical pipe (105a) is fixedly installed at the upper end of the vertical pipe (105b).
3. The low-temperature waste heat recovery device for sulfuric acid production according to claim 2, characterized in that: A fixing member (105c) is fixedly installed inside the vertical pipe (105b). A drain rod (105d) is vertically inserted into the top of the fixing member (105c). A spring (105e) is fixedly sleeved on the drain rod (105d). The lower end of the spring (105e) is fixedly connected to the fixing member (105c). Several cams (203a) are provided on the uppermost stirring member (203). When the rotating shaft (201) drives the stirring member (203) to rotate, the cams (203a) abut against the lower end of the drain rod (105d) and push the drain rod (105d) to move upward.
4. The low-temperature waste heat recovery device for sulfuric acid production according to claim 3, characterized in that: The fixing component (105c) includes a ring (105c1) and a plurality of connecting rods (105c2). The plurality of connecting rods (105c2) are circumferentially distributed on the outer wall of the ring (105c1). The ends of the plurality of connecting rods (105c2) away from the ring (105c1) are all fixedly connected to the inner wall of the vertical pipe (105b). The unblocking rod (105d) is vertically inserted into the ring (105c1).
5. The low-temperature waste heat recovery device for sulfuric acid production according to claim 4, characterized in that: The unblocking rod (105d) includes a vertical rod (105d1) and two diagonal rods (105d2). The two diagonal rods (105d2) are supported on the upper end of the vertical rod (105d1). A semicircular block (105d3) is fixedly sleeved on the vertical rod (105d1). The semicircular block (105d3) is connected to the ring (105c1) by a spring (105e). The spring (105e) is sleeved on the vertical rod (105d1).
6. The low-temperature waste heat recovery device for sulfuric acid production according to claim 1, characterized in that: The heat-conducting pipe (103) includes an outlet pipe (103a) and a spiral pipe (103b). One end of the outlet pipe (103a) is fixedly inserted into the outer wall of the sulfur combustion furnace (101), and the other end of the outlet pipe (103a) is fixedly connected to the spiral pipe (103b). The spiral pipe (103b) is spirally wound around the outer wall of the sulfur storage tank (102).
7. The low-temperature waste heat recovery device for sulfuric acid production according to claim 1, characterized in that: The sulfur storage tank (102) includes a tank body (102a) and several support columns (102b). The support columns (102b) are arranged in a rectangular shape at the bottom of the tank body (102a). A flow collector (102c) is fixedly fitted on the outer wall of the support columns (102b) and is located below the tank body (102a).
8. The low-temperature waste heat recovery device for sulfuric acid production according to claim 1, characterized in that: The stirring component (203) includes a plurality of stirring rods, which are arranged in a circular pattern on the rotating shaft (201) and are located inside the sulfur storage tank (102).